OriginX, OriginY, and OriginZ properties renamed to TransformOriginX, TransformOriginY, and TransformOriginZ. GetOrigin function renamed to GetTransformOrigin

CHANGELOG.md

@@ -1,4 +1,7 @@
 # v0.18.0
+
+* OriginX, OriginY, and OriginZ properties renamed to TransformOriginX, TransformOriginY, and TransformOriginZ
+* GetOrigin function renamed to GetTransformOrigin
 * Added LineJoin type. Type of constants MiterJoin, RoundJoin, and BevelJoin changed to LineJoin. Type of Canvas.SetLineJoin function argument changed to LineJoin.
 * Added LineCap type. Type of constants ButtCap, RoundCap, and SquareCap changed to LineCap. Type of Canvas.SetLineCap function argument changed to LineCap.
 

animationEvents.go

@@ -157,7 +157,7 @@ const (
 
 /*
 func setTransitionListener(properties Properties, tag PropertyName, value any) bool {
-	if listeners, ok := valueToEventListeners[View, string](value); ok {
+	if listeners, ok := valueToOneArgEventListeners[View, string](value); ok {
 		if len(listeners) == 0 {
 			properties.setRaw(tag, nil)
 		} else {
@@ -206,7 +206,7 @@ func (view *viewData) handleTransitionEvents(tag PropertyName, data DataObject)
 			}
 		}
 
-		for _, listener := range getEventListeners[View, PropertyName](view, nil, tag) {
+		for _, listener := range getOneArgEventListeners[View, PropertyName](view, nil, tag) {
 			listener(view, property)
 		}
 	}
@@ -214,7 +214,7 @@ func (view *viewData) handleTransitionEvents(tag PropertyName, data DataObject)
 
 /*
 	func setAnimationListener(properties Properties, tag PropertyName, value any) bool {
-		if listeners, ok := valueToEventListeners[View, string](value); ok {
+		if listeners, ok := valueToOneArgEventListeners[View, string](value); ok {
 			if len(listeners) == 0 {
 				properties.setRaw(tag, nil)
 			} else {
@@ -252,7 +252,7 @@ func animationEventsHtml(view View, buffer *strings.Builder) {
 */
 
 func (view *viewData) handleAnimationEvents(tag PropertyName, data DataObject) {
-	if listeners := getEventListeners[View, string](view, nil, tag); len(listeners) > 0 {
+	if listeners := getOneArgEventListeners[View, string](view, nil, tag); len(listeners) > 0 {
 		id := ""
 		if name, ok := data.PropertyValue("name"); ok {
 			for _, animation := range GetAnimation(view) {
@@ -271,54 +271,54 @@ func (view *viewData) handleAnimationEvents(tag PropertyName, data DataObject) {
 // If there are no listeners then the empty list is returned.
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetTransitionRunListeners(view View, subviewID ...string) []func(View, string) {
-	return getEventListeners[View, string](view, subviewID, TransitionRunEvent)
+	return getOneArgEventListeners[View, string](view, subviewID, TransitionRunEvent)
 }
 
 // GetTransitionStartListeners returns the "transition-start-event" listener list.
 // If there are no listeners then the empty list is returned.
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetTransitionStartListeners(view View, subviewID ...string) []func(View, string) {
-	return getEventListeners[View, string](view, subviewID, TransitionStartEvent)
+	return getOneArgEventListeners[View, string](view, subviewID, TransitionStartEvent)
 }
 
 // GetTransitionEndListeners returns the "transition-end-event" listener list.
 // If there are no listeners then the empty list is returned.
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetTransitionEndListeners(view View, subviewID ...string) []func(View, string) {
-	return getEventListeners[View, string](view, subviewID, TransitionEndEvent)
+	return getOneArgEventListeners[View, string](view, subviewID, TransitionEndEvent)
 }
 
 // GetTransitionCancelListeners returns the "transition-cancel-event" listener list.
 // If there are no listeners then the empty list is returned.
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetTransitionCancelListeners(view View, subviewID ...string) []func(View, string) {
-	return getEventListeners[View, string](view, subviewID, TransitionCancelEvent)
+	return getOneArgEventListeners[View, string](view, subviewID, TransitionCancelEvent)
 }
 
 // GetAnimationStartListeners returns the "animation-start-event" listener list.
 // If there are no listeners then the empty list is returned.
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetAnimationStartListeners(view View, subviewID ...string) []func(View, string) {
-	return getEventListeners[View, string](view, subviewID, AnimationStartEvent)
+	return getOneArgEventListeners[View, string](view, subviewID, AnimationStartEvent)
 }
 
 // GetAnimationEndListeners returns the "animation-end-event" listener list.
 // If there are no listeners then the empty list is returned.
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetAnimationEndListeners(view View, subviewID ...string) []func(View, string) {
-	return getEventListeners[View, string](view, subviewID, AnimationEndEvent)
+	return getOneArgEventListeners[View, string](view, subviewID, AnimationEndEvent)
 }
 
 // GetAnimationCancelListeners returns the "animation-cancel-event" listener list.
 // If there are no listeners then the empty list is returned.
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetAnimationCancelListeners(view View, subviewID ...string) []func(View, string) {
-	return getEventListeners[View, string](view, subviewID, AnimationCancelEvent)
+	return getOneArgEventListeners[View, string](view, subviewID, AnimationCancelEvent)
 }
 
 // GetAnimationIterationListeners returns the "animation-iteration-event" listener list.
 // If there are no listeners then the empty list is returned.
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetAnimationIterationListeners(view View, subviewID ...string) []func(View, string) {
-	return getEventListeners[View, string](view, subviewID, AnimationIterationEvent)
+	return getOneArgEventListeners[View, string](view, subviewID, AnimationIterationEvent)
 }

app_scripts.js

@@ -623,21 +623,10 @@ function listItemClickEvent(element, event) {
 		return
 	}
 
-	let selected = false;
-	if (element.classList) {
-		const focusStyle = getListFocusedItemStyle(element);
-		const blurStyle = getListSelectedItemStyle(element);
-		selected = (element.classList.contains(focusStyle) || element.classList.contains(blurStyle));
-	} 
-
 	const list = element.parentNode.parentNode
 	if (list) {
-		if (!selected) {
+		const number = getListItemNumber(element.id)
-			selectListItem(list, element, true)
+		sendMessage("itemClick{session=" + sessionID + ",id=" + list.id + ",number=" + number + "}");
-		}
-
-		const message = "itemClick{session=" + sessionID + ",id=" + list.id + "}"
-		sendMessage(message);
 	}
 }
 
@@ -664,7 +653,7 @@ function getListSelectedItemStyle(element) {
 	return getStyleAttribute(element, "data-bluritemstyle", "ruiListItemSelected");
 }
 
-function selectListItem(element, item, needSendMessage) {
+function selectListItem(element, item) {
 	const currentId = element.getAttribute("data-current");
 	let message;
 	const focusStyle = getListFocusedItemStyle(element);
@@ -676,11 +665,9 @@ function selectListItem(element, item, needSendMessage) {
 			if (current.classList) {
 				current.classList.remove(focusStyle, blurStyle);
 			}
-			if (sendMessage) {
 			message = "itemUnselected{session=" + sessionID + ",id=" + element.id + "}";
 		}
 	}
-	}
 
 	if (item) {
 		if (element === document.activeElement) {
@@ -694,41 +681,20 @@ function selectListItem(element, item, needSendMessage) {
 		}
 
 		element.setAttribute("data-current", item.id);		
-		if (sendMessage) {
 		const number = getListItemNumber(item.id)
 		if (number != undefined) {
 			message = "itemSelected{session=" + sessionID + ",id=" + element.id + ",number=" + number + "}";
 		}
-		}
+		
 
 		if (item.scrollIntoViewIfNeeded) {
 			item.scrollIntoViewIfNeeded()
 		} else {
 			item.scrollIntoView({block: "nearest", inline: "nearest"});
 		}
-	/*
-		let left = item.offsetLeft - element.offsetLeft;
-		if (left < element.scrollLeft) {
-			element.scrollLeft = left;
 	}
 
-		let top = item.offsetTop - element.offsetTop;
+	if (message != undefined) {
-		if (top < element.scrollTop) {
-			element.scrollTop = top;
-		}
-		
-		let right = left + item.offsetWidth;
-		if (right > element.scrollLeft + element.clientWidth) {
-			element.scrollLeft = right - element.clientWidth;
-		}
-
-		let bottom = top + item.offsetHeight
-		if (bottom > element.scrollTop + element.clientHeight) {
-			element.scrollTop = bottom - element.clientHeight;
-		}*/
-	}
-
-	if (needSendMessage && message != undefined) {
 		sendMessage(message);
 	}
 	scanElementsSize();
@@ -857,7 +823,7 @@ function listViewKeyDownEvent(element, event) {
 			switch (key) {
 				case " ": 
 				case "Enter":
-					const message = "itemClick{session=" + sessionID + ",id=" + element.id + "}";
+					const message = "itemClick{session=" + sessionID + ",id=" + element.id + ",number=" + getListItemNumber(currentId) + "}";
 					sendMessage(message);
 					break;
 
@@ -897,7 +863,7 @@ function listViewKeyDownEvent(element, event) {
 					return;
 			}
 			if (item && item !== current) {
-				selectListItem(element, item, true);
+				selectListItem(element, item);
 			}
 		} else {
 			switch (key) {
@@ -916,7 +882,7 @@ function listViewKeyDownEvent(element, event) {
 						if (item.getAttribute("data-disabled") == "1") {
 							continue;
 						}
-						selectListItem(element, item, true);
+						selectListItem(element, item);
 						return;
 					}
 					break;

canvasView.go

@@ -37,8 +37,8 @@ func (canvasView *canvasViewData) init(session Session) {
 	canvasView.viewData.init(session)
 	canvasView.tag = "CanvasView"
 	canvasView.normalize = normalizeCanvasViewTag
-	canvasView.set = canvasViewSet
+	canvasView.set = canvasView.setFunc
-	canvasView.remove = canvasViewRemove
+	canvasView.remove = canvasView.removeFunc
 
 }
 
@@ -51,36 +51,32 @@ func normalizeCanvasViewTag(tag PropertyName) PropertyName {
 	return tag
 }
 
-func canvasViewRemove(view View, tag PropertyName) []PropertyName {
+func (canvasView *canvasViewData) removeFunc(tag PropertyName) []PropertyName {
 	if tag == DrawFunction {
-		if view.getRaw(DrawFunction) != nil {
+		if canvasView.getRaw(DrawFunction) != nil {
-			view.setRaw(DrawFunction, nil)
+			canvasView.setRaw(DrawFunction, nil)
-			if canvasView, ok := view.(CanvasView); ok {
 			canvasView.Redraw()
-			}
 			return []PropertyName{DrawFunction}
 		}
 		return []PropertyName{}
 	}
 
-	return viewRemove(view, tag)
+	return canvasView.viewData.removeFunc(tag)
 }
 
-func canvasViewSet(view View, tag PropertyName, value any) []PropertyName {
+func (canvasView *canvasViewData) setFunc(tag PropertyName, value any) []PropertyName {
 	if tag == DrawFunction {
 		if fn, ok := value.(func(Canvas)); ok {
-			view.setRaw(DrawFunction, fn)
+			canvasView.setRaw(DrawFunction, fn)
 		} else {
 			notCompatibleType(tag, value)
 			return nil
 		}
-		if canvasView, ok := view.(CanvasView); ok {
 		canvasView.Redraw()
-		}
 		return []PropertyName{DrawFunction}
 	}
 
-	return viewSet(view, tag, value)
+	return canvasView.viewData.setFunc(tag, value)
 }
 
 func (canvasView *canvasViewData) htmlTag() string {

checkbox.go

@@ -49,117 +49,98 @@ func (button *checkboxData) init(session Session) {
 	button.systemClass = "ruiGridLayout ruiCheckbox"
 	button.set = button.setFunc
 	button.remove = button.removeFunc
-	button.changed = checkboxPropertyChanged
+	button.changed = button.propertyChanged
 
-	button.setRaw(ClickEvent, checkboxClickListener)
+	button.setRaw(ClickEvent, []func(View, MouseEvent){checkboxClickListener})
-	button.setRaw(KeyDownEvent, checkboxKeyListener)
+	button.setRaw(KeyDownEvent, []func(View, KeyEvent){checkboxKeyListener})
 }
 
 func (button *checkboxData) Focusable() bool {
 	return true
 }
 
-func checkboxPropertyChanged(view View, tag PropertyName) {
+func (button *checkboxData) propertyChanged(tag PropertyName) {
 	switch tag {
 
 	case Checked:
-		session := view.Session()
+		session := button.Session()
-		checked := IsCheckboxChecked(view)
+		checked := IsCheckboxChecked(button)
-		if listeners := GetCheckboxChangedListeners(view); len(listeners) > 0 {
+		if listeners := GetCheckboxChangedListeners(button); len(listeners) > 0 {
-			if checkbox, ok := view.(Checkbox); ok {
 			for _, listener := range listeners {
-					listener(checkbox, checked)
+				listener(button, checked)
-				}
 			}
 		}
 
 		buffer := allocStringBuilder()
 		defer freeStringBuilder(buffer)
 
-		checkboxHtml(view, buffer, checked)
+		checkboxHtml(button, buffer, checked)
-		session.updateInnerHTML(view.htmlID()+"checkbox", buffer.String())
+		session.updateInnerHTML(button.htmlID()+"checkbox", buffer.String())
 
 	case CheckboxHorizontalAlign, CheckboxVerticalAlign:
-		htmlID := view.htmlID()
+		htmlID := button.htmlID()
-		session := view.Session()
+		session := button.Session()
 		updateCSSStyle(htmlID, session)
 		updateInnerHTML(htmlID, session)
 
 	case VerticalAlign:
-		view.Session().updateCSSProperty(view.htmlID()+"content", "align-items", checkboxVerticalAlignCSS(view))
+		button.Session().updateCSSProperty(button.htmlID()+"content", "align-items", checkboxVerticalAlignCSS(button))
 
 	case HorizontalAlign:
-		view.Session().updateCSSProperty(view.htmlID()+"content", "justify-items", checkboxHorizontalAlignCSS(view))
+		button.Session().updateCSSProperty(button.htmlID()+"content", "justify-items", checkboxHorizontalAlignCSS(button))
 
 	case AccentColor:
-		updateInnerHTML(view.htmlID(), view.Session())
+		updateInnerHTML(button.htmlID(), button.Session())
 
 	default:
-		viewsContainerPropertyChanged(view, tag)
+		button.viewsContainerData.propertyChanged(tag)
 	}
 }
 
-func (button *checkboxData) setFunc(view View, tag PropertyName, value any) []PropertyName {
+func (button *checkboxData) setFunc(tag PropertyName, value any) []PropertyName {
 	switch tag {
 	case ClickEvent:
-		if button.viewsContainerData.setFunc(view, ClickEvent, value) != nil {
+		if listeners, ok := valueToOneArgEventListeners[View, MouseEvent](value); ok && listeners != nil {
-			if value := view.getRaw(ClickEvent); value != nil {
-				if listeners, ok := value.([]func(View, MouseEvent)); ok {
 			listeners = append(listeners, checkboxClickListener)
-					view.setRaw(ClickEvent, listeners)
+			button.setRaw(tag, listeners)
-					return []PropertyName{ClickEvent}
+			return []PropertyName{tag}
-				}
-			}
-
-			return button.viewsContainerData.setFunc(view, ClickEvent, checkboxClickListener)
 		}
 		return nil
 
 	case KeyDownEvent:
-		if button.viewsContainerData.setFunc(view, KeyDownEvent, value) != nil {
+		if listeners, ok := valueToOneArgEventListeners[View, KeyEvent](value); ok && listeners != nil {
-			if value := view.getRaw(KeyDownEvent); value != nil {
-				if listeners, ok := value.([]func(View, KeyEvent)); ok {
 			listeners = append(listeners, checkboxKeyListener)
-					view.setRaw(KeyDownEvent, listeners)
+			button.setRaw(tag, listeners)
-					return []PropertyName{KeyDownEvent}
+			return []PropertyName{tag}
-				}
-			}
-
-			return button.viewsContainerData.setFunc(view, KeyDownEvent, checkboxKeyListener)
 		}
 		return nil
 
 	case CheckboxChangedEvent:
-		return setViewEventListener[Checkbox, bool](view, tag, value)
+		return setOneArgEventListener[Checkbox, bool](button, tag, value)
 
 	case Checked:
-		return setBoolProperty(view, Checked, value)
+		return setBoolProperty(button, Checked, value)
 
 	case CellVerticalAlign, CellHorizontalAlign, CellWidth, CellHeight:
 		ErrorLogF(`"%s" property is not compatible with the BoundsProperty`, string(tag))
 		return nil
 	}
 
-	return button.viewsContainerData.setFunc(view, tag, value)
+	return button.viewsContainerData.setFunc(tag, value)
 }
 
-func (button *checkboxData) removeFunc(view View, tag PropertyName) []PropertyName {
+func (button *checkboxData) removeFunc(tag PropertyName) []PropertyName {
 	switch tag {
 	case ClickEvent:
-		button.setRaw(ClickEvent, checkboxClickListener)
+		button.setRaw(ClickEvent, []func(View, MouseEvent){checkboxClickListener})
 		return []PropertyName{ClickEvent}
 
 	case KeyDownEvent:
-		button.setRaw(KeyDownEvent, checkboxKeyListener)
+		button.setRaw(KeyDownEvent, []func(View, KeyEvent){checkboxKeyListener})
 		return []PropertyName{ClickEvent}
 	}
 
-	return button.viewsContainerData.removeFunc(view, tag)
+	return button.viewsContainerData.removeFunc(tag)
-}
-
-func (button *checkboxData) checked() bool {
-	checked, _ := boolProperty(button, Checked, button.Session())
-	return checked
 }
 
 /*
@@ -340,5 +321,5 @@ func GetCheckboxHorizontalAlign(view View, subviewID ...string) int {
 // If there are no listeners then the empty list is returned
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetCheckboxChangedListeners(view View, subviewID ...string) []func(Checkbox, bool) {
-	return getEventListeners[Checkbox, bool](view, subviewID, CheckboxChangedEvent)
+	return getOneArgEventListeners[Checkbox, bool](view, subviewID, CheckboxChangedEvent)
 }

colorPicker.go

@@ -66,8 +66,8 @@ func (picker *colorPickerData) init(session Session) {
 	picker.hasHtmlDisabled = true
 	picker.properties[Padding] = Px(0)
 	picker.normalize = normalizeColorPickerTag
-	picker.set = colorPickerSet
+	picker.set = picker.setFunc
-	picker.changed = colorPickerPropertyChanged
+	picker.changed = picker.propertyChanged
 }
 
 func normalizeColorPickerTag(tag PropertyName) PropertyName {
@@ -80,44 +80,44 @@ func normalizeColorPickerTag(tag PropertyName) PropertyName {
 	return normalizeDataListTag(tag)
 }
 
-func colorPickerSet(view View, tag PropertyName, value any) []PropertyName {
+func (picker *colorPickerData) setFunc(tag PropertyName, value any) []PropertyName {
 	switch tag {
 	case ColorChangedEvent:
-		return setEventWithOldListener[ColorPicker, Color](view, tag, value)
+		return setTwoArgEventListener[ColorPicker, Color](picker, tag, value)
 
 	case ColorPickerValue:
-		oldColor := GetColorPickerValue(view)
+		oldColor := GetColorPickerValue(picker)
-		result := setColorProperty(view, ColorPickerValue, value)
+		result := setColorProperty(picker, ColorPickerValue, value)
 		if result != nil {
-			view.setRaw("old-color", oldColor)
+			picker.setRaw("old-color", oldColor)
 		}
 		return result
 
 	case DataList:
-		return setDataList(view, value, "")
+		return setDataList(picker, value, "")
 	}
 
-	return viewSet(view, tag, value)
+	return picker.viewData.setFunc(tag, value)
 }
 
-func colorPickerPropertyChanged(view View, tag PropertyName) {
+func (picker *colorPickerData) propertyChanged(tag PropertyName) {
 	switch tag {
 	case ColorPickerValue:
-		color := GetColorPickerValue(view)
+		color := GetColorPickerValue(picker)
-		view.Session().callFunc("setInputValue", view.htmlID(), color.rgbString())
+		picker.Session().callFunc("setInputValue", picker.htmlID(), color.rgbString())
 
-		if listeners := GetColorChangedListeners(view); len(listeners) > 0 {
+		if listeners := GetColorChangedListeners(picker); len(listeners) > 0 {
 			oldColor := Color(0)
-			if value := view.getRaw("old-color"); value != nil {
+			if value := picker.getRaw("old-color"); value != nil {
 				oldColor = value.(Color)
 			}
 			for _, listener := range listeners {
-				listener(view, color, oldColor)
+				listener(picker, color, oldColor)
 			}
 		}
 
 	default:
-		viewPropertyChanged(view, tag)
+		picker.viewData.propertyChanged(tag)
 	}
 
 }
@@ -196,5 +196,5 @@ func GetColorPickerValue(view View, subviewID ...string) Color {
 // If there are no listeners then the empty list is returned
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetColorChangedListeners(view View, subviewID ...string) []func(ColorPicker, Color, Color) {
-	return getEventWithOldListeners[ColorPicker, Color](view, subviewID, ColorChangedEvent)
+	return getTwoArgEventListeners[ColorPicker, Color](view, subviewID, ColorChangedEvent)
 }

columnLayout.go

@@ -141,7 +141,7 @@ func (columnLayout *columnLayoutData) init(session Session) {
 	columnLayout.viewsContainerData.init(session)
 	columnLayout.tag = "ColumnLayout"
 	columnLayout.normalize = normalizeColumnLayoutTag
-	columnLayout.changed = columnLayoutPropertyChanged
+	columnLayout.changed = columnLayout.propertyChanged
 	//columnLayout.systemClass = "ruiColumnLayout"
 }
 
@@ -154,27 +154,27 @@ func normalizeColumnLayoutTag(tag PropertyName) PropertyName {
 	return tag
 }
 
-func columnLayoutPropertyChanged(view View, tag PropertyName) {
+func (columnLayout *columnLayoutData) propertyChanged(tag PropertyName) {
 	switch tag {
 	case ColumnSeparator:
 		css := ""
-		session := view.Session()
+		session := columnLayout.Session()
-		if value := view.getRaw(ColumnSeparator); value != nil {
+		if value := columnLayout.getRaw(ColumnSeparator); value != nil {
 			separator := value.(ColumnSeparatorProperty)
-			css = separator.cssValue(view.Session())
+			css = separator.cssValue(session)
 		}
-		session.updateCSSProperty(view.htmlID(), "column-rule", css)
+		session.updateCSSProperty(columnLayout.htmlID(), "column-rule", css)
 
 	case ColumnCount:
-		session := view.Session()
+		session := columnLayout.Session()
-		if count, ok := intProperty(view, tag, session, 0); ok && count > 0 {
+		if count := GetColumnCount(columnLayout); count > 0 {
-			session.updateCSSProperty(view.htmlID(), string(ColumnCount), strconv.Itoa(count))
+			session.updateCSSProperty(columnLayout.htmlID(), string(ColumnCount), strconv.Itoa(count))
 		} else {
-			session.updateCSSProperty(view.htmlID(), string(ColumnCount), "auto")
+			session.updateCSSProperty(columnLayout.htmlID(), string(ColumnCount), "auto")
 		}
 
 	default:
-		viewsContainerPropertyChanged(view, tag)
+		columnLayout.viewsContainerData.propertyChanged(tag)
 	}
 }
 

columnSeparator.go

@@ -82,6 +82,7 @@ func NewColumnSeparator(params Params) ColumnSeparatorProperty {
 func (separator *columnSeparatorProperty) init() {
 	separator.dataProperty.init()
 	separator.normalize = normalizeVolumnSeparatorTag
+	separator.set = columnSeparatorSet
 	separator.supportedProperties = []PropertyName{Style, Width, ColorTag}
 }
 
@@ -171,3 +172,10 @@ func (separator *columnSeparatorProperty) cssValue(session Session) string {
 
 	return buffer.String()
 }
+
+func columnSeparatorSet(properties Properties, tag PropertyName, value any) []PropertyName {
+	if tag == Style {
+		return setEnumProperty(properties, Style, value, enumProperties[BorderStyle].values)
+	}
+	return propertiesSet(properties, tag, value)
+}

dataList.go

@@ -120,7 +120,7 @@ func normalizeDataListTag(tag PropertyName) PropertyName {
 }
 
 func setDataList(properties Properties, value any, dateTimeFormat string) []PropertyName {
-	if items, ok := anyToStringArray(value, timeFormat); ok {
+	if items, ok := anyToStringArray(value, dateTimeFormat); ok {
 		properties.setRaw(DataList, items)
 		return []PropertyName{DataList}
 	}

datePicker.go

@@ -138,8 +138,8 @@ func (picker *datePickerData) init(session Session) {
 	picker.tag = "DatePicker"
 	picker.hasHtmlDisabled = true
 	picker.normalize = normalizeDatePickerTag
-	picker.set = datePickerSet
+	picker.set = picker.setFunc
-	picker.changed = datePickerPropertyChanged
+	picker.changed = picker.propertyChanged
 }
 
 func (picker *datePickerData) Focusable() bool {
@@ -198,22 +198,22 @@ func stringToDate(value string) (time.Time, bool) {
 	return time.Now(), false
 }
 
-func datePickerSet(view View, tag PropertyName, value any) []PropertyName {
+func (picker *datePickerData) setFunc(tag PropertyName, value any) []PropertyName {
 
 	setDateValue := func(tag PropertyName) []PropertyName {
 		switch value := value.(type) {
 		case time.Time:
-			view.setRaw(tag, value)
+			picker.setRaw(tag, value)
 			return []PropertyName{tag}
 
 		case string:
 			if isConstantName(value) {
-				view.setRaw(tag, value)
+				picker.setRaw(tag, value)
 				return []PropertyName{tag}
 			}
 
 			if date, ok := stringToDate(value); ok {
-				view.setRaw(tag, date)
+				picker.setRaw(tag, date)
 				return []PropertyName{tag}
 			}
 		}
@@ -227,67 +227,67 @@ func datePickerSet(view View, tag PropertyName, value any) []PropertyName {
 		return setDateValue(tag)
 
 	case DatePickerStep:
-		return setIntProperty(view, DatePickerStep, value)
+		return setIntProperty(picker, DatePickerStep, value)
 
 	case DatePickerValue:
-		view.setRaw("old-date", GetDatePickerValue(view))
+		picker.setRaw("old-date", GetDatePickerValue(picker))
 		return setDateValue(tag)
 
 	case DateChangedEvent:
-		return setEventWithOldListener[DatePicker, time.Time](view, tag, value)
+		return setTwoArgEventListener[DatePicker, time.Time](picker, tag, value)
 
 	case DataList:
-		return setDataList(view, value, dateFormat)
+		return setDataList(picker, value, dateFormat)
 	}
 
-	return viewSet(view, tag, value)
+	return picker.viewData.setFunc(tag, value)
 }
 
-func datePickerPropertyChanged(view View, tag PropertyName) {
+func (picker *datePickerData) propertyChanged(tag PropertyName) {
 
-	session := view.Session()
+	session := picker.Session()
 
 	switch tag {
 
 	case DatePickerMin:
-		if date, ok := GetDatePickerMin(view); ok {
+		if date, ok := GetDatePickerMin(picker); ok {
-			session.updateProperty(view.htmlID(), "min", date.Format(dateFormat))
+			session.updateProperty(picker.htmlID(), "min", date.Format(dateFormat))
 		} else {
-			session.removeProperty(view.htmlID(), "min")
+			session.removeProperty(picker.htmlID(), "min")
 		}
 
 	case DatePickerMax:
-		if date, ok := GetDatePickerMax(view); ok {
+		if date, ok := GetDatePickerMax(picker); ok {
-			session.updateProperty(view.htmlID(), "max", date.Format(dateFormat))
+			session.updateProperty(picker.htmlID(), "max", date.Format(dateFormat))
 		} else {
-			session.removeProperty(view.htmlID(), "max")
+			session.removeProperty(picker.htmlID(), "max")
 		}
 
 	case DatePickerStep:
-		if step := GetDatePickerStep(view); step > 0 {
+		if step := GetDatePickerStep(picker); step > 0 {
-			session.updateProperty(view.htmlID(), "step", strconv.Itoa(step))
+			session.updateProperty(picker.htmlID(), "step", strconv.Itoa(step))
 		} else {
-			session.removeProperty(view.htmlID(), "step")
+			session.removeProperty(picker.htmlID(), "step")
 		}
 
 	case DatePickerValue:
-		date := GetDatePickerValue(view)
+		date := GetDatePickerValue(picker)
-		session.callFunc("setInputValue", view.htmlID(), date.Format(dateFormat))
+		session.callFunc("setInputValue", picker.htmlID(), date.Format(dateFormat))
 
-		if listeners := GetDateChangedListeners(view); len(listeners) > 0 {
+		if listeners := GetDateChangedListeners(picker); len(listeners) > 0 {
 			oldDate := time.Now()
-			if value := view.getRaw("old-date"); value != nil {
+			if value := picker.getRaw("old-date"); value != nil {
 				if date, ok := value.(time.Time); ok {
 					oldDate = date
 				}
 			}
 			for _, listener := range listeners {
-				listener(view, date, oldDate)
+				listener(picker, date, oldDate)
 			}
 		}
 
 	default:
-		viewPropertyChanged(view, tag)
+		picker.viewData.propertyChanged(tag)
 	}
 }
 
@@ -447,5 +447,5 @@ func GetDatePickerValue(view View, subviewID ...string) time.Time {
 // If there are no listeners then the empty list is returned
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetDateChangedListeners(view View, subviewID ...string) []func(DatePicker, time.Time, time.Time) {
-	return getEventWithOldListeners[DatePicker, time.Time](view, subviewID, DateChangedEvent)
+	return getTwoArgEventListeners[DatePicker, time.Time](view, subviewID, DateChangedEvent)
 }

detailsView.go

@@ -54,7 +54,7 @@ func (detailsView *detailsViewData) init(session Session) {
 	detailsView.viewsContainerData.init(session)
 	detailsView.tag = "DetailsView"
 	detailsView.set = detailsView.setFunc
-	detailsView.changed = detailsViewPropertyChanged
+	detailsView.changed = detailsView.propertyChanged
 	//detailsView.systemClass = "ruiDetailsView"
 }
 
@@ -69,7 +69,7 @@ func (detailsView *detailsViewData) Views() []View {
 	return views
 }
 
-func (detailsView *detailsViewData) setFunc(self View, tag PropertyName, value any) []PropertyName {
+func (detailsView *detailsViewData) setFunc(tag PropertyName, value any) []PropertyName {
 	switch tag {
 	case Summary:
 		switch value := value.(type) {
@@ -95,26 +95,26 @@ func (detailsView *detailsViewData) setFunc(self View, tag PropertyName, value a
 		return []PropertyName{tag}
 	}
 
-	return detailsView.viewsContainerData.setFunc(detailsView, tag, value)
+	return detailsView.viewsContainerData.setFunc(tag, value)
 }
 
-func detailsViewPropertyChanged(view View, tag PropertyName) {
+func (detailsView *detailsViewData) propertyChanged(tag PropertyName) {
 	switch tag {
 	case Summary:
-		updateInnerHTML(view.htmlID(), view.Session())
+		updateInnerHTML(detailsView.htmlID(), detailsView.Session())
 
 	case Expanded:
-		if IsDetailsExpanded(view) {
+		if IsDetailsExpanded(detailsView) {
-			view.Session().updateProperty(view.htmlID(), "open", "")
+			detailsView.Session().updateProperty(detailsView.htmlID(), "open", "")
 		} else {
-			view.Session().removeProperty(view.htmlID(), "open")
+			detailsView.Session().removeProperty(detailsView.htmlID(), "open")
 		}
 
 	case NotTranslate:
-		updateInnerHTML(view.htmlID(), view.Session())
+		updateInnerHTML(detailsView.htmlID(), detailsView.Session())
 
 	default:
-		viewsContainerPropertyChanged(view, tag)
+		detailsView.viewsContainerData.propertyChanged(tag)
 	}
 }
 
@@ -155,8 +155,8 @@ func (detailsView *detailsViewData) handleCommand(self View, command PropertyNam
 	if command == "details-open" {
 		if n, ok := dataIntProperty(data, "open"); ok {
 			detailsView.properties[Expanded] = (n != 0)
-			if listener, ok := detailsView.changeListener[Current]; ok {
+			if listener, ok := detailsView.changeListener[Expanded]; ok {
-				listener(detailsView, Current)
+				listener(detailsView, Expanded)
 			}
 		}
 		return true

dropDownList.go

@@ -46,8 +46,8 @@ func (list *dropDownListData) init(session Session) {
 	list.tag = "DropDownList"
 	list.hasHtmlDisabled = true
 	list.normalize = normalizeDropDownListTag
-	list.set = dropDownListSet
+	list.set = list.setFunc
-	list.changed = dropDownListPropertyChanged
+	list.changed = list.propertyChanged
 }
 
 func (list *dropDownListData) Focusable() bool {
@@ -62,59 +62,49 @@ func normalizeDropDownListTag(tag PropertyName) PropertyName {
 	return tag
 }
 
-func dropDownListSet(view View, tag PropertyName, value any) []PropertyName {
+func (list *dropDownListData) setFunc(tag PropertyName, value any) []PropertyName {
 	switch tag {
 	case Items:
 		if items, ok := anyToStringArray(value, ""); ok {
-			return setArrayPropertyValue(view, tag, items)
+			return setArrayPropertyValue(list, tag, items)
 		}
 		notCompatibleType(Items, value)
 		return nil
 
 	case DisabledItems, ItemSeparators:
 		if items, ok := parseIndicesArray(value); ok {
-			return setArrayPropertyValue(view, tag, items)
+			return setArrayPropertyValue(list, tag, items)
 		}
 		notCompatibleType(tag, value)
 		return nil
 
 	case DropDownEvent:
-		return setEventWithOldListener[DropDownList, int](view, tag, value)
+		return setTwoArgEventListener[DropDownList, int](list, tag, value)
 
 	case Current:
-		if view, ok := view.(View); ok {
+		list.setRaw("old-current", GetCurrent(list))
-			view.setRaw("old-current", GetCurrent(view))
+		return setIntProperty(list, Current, value)
-		}
-		return setIntProperty(view, Current, value)
 	}
 
-	return viewSet(view, tag, value)
+	return list.viewData.setFunc(tag, value)
 }
 
-func dropDownListPropertyChanged(view View, tag PropertyName) {
+func (list *dropDownListData) propertyChanged(tag PropertyName) {
 	switch tag {
 	case Items, DisabledItems, ItemSeparators:
-		updateInnerHTML(view.htmlID(), view.Session())
+		updateInnerHTML(list.htmlID(), list.Session())
 
 	case Current:
-		current := GetCurrent(view)
+		current := GetCurrent(list)
-		view.Session().callFunc("selectDropDownListItem", view.htmlID(), current)
+		list.Session().callFunc("selectDropDownListItem", list.htmlID(), current)
 
-		if list, ok := view.(DropDownList); ok {
+		oldCurrent, _ := intProperty(list, "old-current", list.Session(), -1)
-			oldCurrent := -1
+		for _, listener := range GetDropDownListeners(list) {
-			if value := view.getRaw("old-current"); value != nil {
-				if n, ok := value.(int); ok {
-					oldCurrent = n
-				}
-			}
-
-			for _, listener := range GetDropDownListeners(view) {
 			listener(list, current, oldCurrent)
 		}
-		}
 
 	default:
-		viewPropertyChanged(view, tag)
+		list.viewData.propertyChanged(tag)
 	}
 }
 
@@ -253,6 +243,9 @@ func (list *dropDownListData) handleCommand(self View, command PropertyName, dat
 					for _, listener := range GetDropDownListeners(list) {
 						listener(list, number, old)
 					}
+					if listener, ok := list.changeListener[Current]; ok {
+						listener(list, Current)
+					}
 				}
 			} else {
 				ErrorLog(err.Error())
@@ -268,7 +261,7 @@ func (list *dropDownListData) handleCommand(self View, command PropertyName, dat
 // GetDropDownListeners returns the "drop-down-event" listener list. If there are no listeners then the empty list is returned.
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetDropDownListeners(view View, subviewID ...string) []func(DropDownList, int, int) {
-	return getEventWithOldListeners[DropDownList, int](view, subviewID, DropDownEvent)
+	return getTwoArgEventListeners[DropDownList, int](view, subviewID, DropDownEvent)
 }
 
 // GetDropDownItems return the DropDownList items list.

editView.go

@@ -121,8 +121,8 @@ func (edit *editViewData) init(session Session) {
 	edit.hasHtmlDisabled = true
 	edit.tag = "EditView"
 	edit.normalize = normalizeEditViewTag
-	edit.set = editViewSet
+	edit.set = edit.setFunc
-	edit.changed = editViewPropertyChanged
+	edit.changed = edit.propertyChanged
 }
 
 func (edit *editViewData) Focusable() bool {
@@ -148,18 +148,18 @@ func normalizeEditViewTag(tag PropertyName) PropertyName {
 	return normalizeDataListTag(tag)
 }
 
-func editViewSet(view View, tag PropertyName, value any) []PropertyName {
+func (edit *editViewData) setFunc(tag PropertyName, value any) []PropertyName {
 	switch tag {
 	case Text:
 		if text, ok := value.(string); ok {
 			old := ""
-			if val := view.getRaw(Text); val != nil {
+			if val := edit.getRaw(Text); val != nil {
 				if txt, ok := val.(string); ok {
 					old = txt
 				}
 			}
-			view.setRaw("old-text", old)
+			edit.setRaw("old-text", old)
-			view.setRaw(tag, text)
+			edit.setRaw(tag, text)
 			return []PropertyName{tag}
 		}
 
@@ -168,85 +168,83 @@ func editViewSet(view View, tag PropertyName, value any) []PropertyName {
 
 	case Hint:
 		if text, ok := value.(string); ok {
-			return setStringPropertyValue(view, tag, strings.Trim(text, " \t\n"))
+			return setStringPropertyValue(edit, tag, strings.Trim(text, " \t\n"))
 		}
 		notCompatibleType(tag, value)
 		return nil
 
 	case DataList:
-		setDataList(view, value, "")
+		setDataList(edit, value, "")
 
 	case EditTextChangedEvent:
-		return setEventWithOldListener[EditView, string](view, tag, value)
+		return setTwoArgEventListener[EditView, string](edit, tag, value)
 	}
 
-	return viewSet(view, tag, value)
+	return edit.viewData.setFunc(tag, value)
 }
 
-func editViewPropertyChanged(view View, tag PropertyName) {
+func (edit *editViewData) propertyChanged(tag PropertyName) {
-	session := view.Session()
+	session := edit.Session()
 
 	switch tag {
 	case Text:
-		text := GetText(view)
+		text := GetText(edit)
-		session.callFunc("setInputValue", view.htmlID(), text)
+		session.callFunc("setInputValue", edit.htmlID(), text)
 
-		if edit, ok := view.(EditView); ok {
 		old := ""
-			if val := view.getRaw("old-text"); val != nil {
+		if val := edit.getRaw("old-text"); val != nil {
 			if txt, ok := val.(string); ok {
 				old = txt
 			}
 		}
 		edit.textChanged(text, old)
-		}
 
 	case Hint:
-		if text := GetHint(view); text != "" {
+		if text := GetHint(edit); text != "" {
-			session.updateProperty(view.htmlID(), "placeholder", text)
+			session.updateProperty(edit.htmlID(), "placeholder", text)
 		} else {
-			session.removeProperty(view.htmlID(), "placeholder")
+			session.removeProperty(edit.htmlID(), "placeholder")
 		}
 
 	case MaxLength:
-		if maxLength := GetMaxLength(view); maxLength > 0 {
+		if maxLength := GetMaxLength(edit); maxLength > 0 {
-			session.updateProperty(view.htmlID(), "maxlength", strconv.Itoa(maxLength))
+			session.updateProperty(edit.htmlID(), "maxlength", strconv.Itoa(maxLength))
 		} else {
-			session.removeProperty(view.htmlID(), "maxlength")
+			session.removeProperty(edit.htmlID(), "maxlength")
 		}
 
 	case ReadOnly:
-		if IsReadOnly(view) {
+		if IsReadOnly(edit) {
-			session.updateProperty(view.htmlID(), "readonly", "")
+			session.updateProperty(edit.htmlID(), "readonly", "")
 		} else {
-			session.removeProperty(view.htmlID(), "readonly")
+			session.removeProperty(edit.htmlID(), "readonly")
 		}
 
 	case Spellcheck:
-		session.updateProperty(view.htmlID(), "spellcheck", IsSpellcheck(view))
+		session.updateProperty(edit.htmlID(), "spellcheck", IsSpellcheck(edit))
 
 	case EditViewPattern:
-		if text := GetEditViewPattern(view); text != "" {
+		if text := GetEditViewPattern(edit); text != "" {
-			session.updateProperty(view.htmlID(), "pattern", text)
+			session.updateProperty(edit.htmlID(), "pattern", text)
 		} else {
-			session.removeProperty(view.htmlID(), "pattern")
+			session.removeProperty(edit.htmlID(), "pattern")
 		}
 
 	case EditViewType:
-		updateInnerHTML(view.parentHTMLID(), session)
+		updateInnerHTML(edit.parentHTMLID(), session)
 
 	case EditWrap:
-		if wrap := IsEditViewWrap(view); wrap {
+		if wrap := IsEditViewWrap(edit); wrap {
-			session.updateProperty(view.htmlID(), "wrap", "soft")
+			session.updateProperty(edit.htmlID(), "wrap", "soft")
 		} else {
-			session.updateProperty(view.htmlID(), "wrap", "off")
+			session.updateProperty(edit.htmlID(), "wrap", "off")
 		}
 
 	case DataList:
-		updateInnerHTML(view.htmlID(), session)
+		updateInnerHTML(edit.htmlID(), session)
 
 	default:
-		viewPropertyChanged(view, tag)
+		edit.viewData.propertyChanged(tag)
 	}
 }
 
@@ -467,7 +465,7 @@ func IsSpellcheck(view View, subviewID ...string) bool {
 // If there are no listeners then the empty list is returned
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetTextChangedListeners(view View, subviewID ...string) []func(EditView, string, string) {
-	return getEventWithOldListeners[EditView, string](view, subviewID, EditTextChangedEvent)
+	return getTwoArgEventListeners[EditView, string](view, subviewID, EditTextChangedEvent)
 }
 
 // GetEditViewType returns a value of the Type property of EditView.

events.go

@@ -35,7 +35,7 @@ var eventJsFunc = map[PropertyName]struct{ jsEvent, jsFunc string }{
 	AnimationCancelEvent:    {jsEvent: "onanimationcancel", jsFunc: "animationCancelEvent"},
 }
 
-func valueToNoParamListeners[V any](value any) ([]func(V), bool) {
+func valueToNoArgEventListeners[V any](value any) ([]func(V), bool) {
 	if value == nil {
 		return nil, true
 	}
@@ -106,7 +106,7 @@ func valueToNoParamListeners[V any](value any) ([]func(V), bool) {
 	return nil, false
 }
 
-func valueToEventListeners[V View, E any](value any) ([]func(V, E), bool) {
+func valueToOneArgEventListeners[V View, E any](value any) ([]func(V, E), bool) {
 	if value == nil {
 		return nil, true
 	}
@@ -231,7 +231,7 @@ func valueToEventListeners[V View, E any](value any) ([]func(V, E), bool) {
 	return nil, false
 }
 
-func valueToEventWithOldListeners[V View, E any](value any) ([]func(V, E, E), bool) {
+func valueToTwoArgEventListeners[V View, E any](value any) ([]func(V, E, E), bool) {
 	if value == nil {
 		return nil, true
 	}
@@ -410,7 +410,7 @@ func valueToEventWithOldListeners[V View, E any](value any) ([]func(V, E, E), bo
 	return nil, false
 }
 
-func getNoParamEventListeners[V View](view View, subviewID []string, tag PropertyName) []func(V) {
+func getNoArgEventListeners[V View](view View, subviewID []string, tag PropertyName) []func(V) {
 	if len(subviewID) > 0 && subviewID[0] != "" {
 		view = ViewByID(view, subviewID[0])
 	}
@@ -424,7 +424,7 @@ func getNoParamEventListeners[V View](view View, subviewID []string, tag Propert
 	return []func(V){}
 }
 
-func getEventListeners[V View, E any](view View, subviewID []string, tag PropertyName) []func(V, E) {
+func getOneArgEventListeners[V View, E any](view View, subviewID []string, tag PropertyName) []func(V, E) {
 	if len(subviewID) > 0 && subviewID[0] != "" {
 		view = ViewByID(view, subviewID[0])
 	}
@@ -438,7 +438,7 @@ func getEventListeners[V View, E any](view View, subviewID []string, tag Propert
 	return []func(V, E){}
 }
 
-func getEventWithOldListeners[V View, E any](view View, subviewID []string, tag PropertyName) []func(V, E, E) {
+func getTwoArgEventListeners[V View, E any](view View, subviewID []string, tag PropertyName) []func(V, E, E) {
 	if len(subviewID) > 0 && subviewID[0] != "" {
 		view = ViewByID(view, subviewID[0])
 	}
@@ -452,8 +452,8 @@ func getEventWithOldListeners[V View, E any](view View, subviewID []string, tag
 	return []func(V, E, E){}
 }
 
-func setNoParamEventListener[V View](properties Properties, tag PropertyName, value any) []PropertyName {
+func setNoArgEventListener[V View](properties Properties, tag PropertyName, value any) []PropertyName {
-	if listeners, ok := valueToNoParamListeners[V](value); ok {
+	if listeners, ok := valueToNoArgEventListeners[V](value); ok {
 		if len(listeners) > 0 {
 			properties.setRaw(tag, listeners)
 		} else if properties.getRaw(tag) != nil {
@@ -467,8 +467,8 @@ func setNoParamEventListener[V View](properties Properties, tag PropertyName, va
 	return nil
 }
 
-func setViewEventListener[V View, T any](properties Properties, tag PropertyName, value any) []PropertyName {
+func setOneArgEventListener[V View, T any](properties Properties, tag PropertyName, value any) []PropertyName {
-	if listeners, ok := valueToEventListeners[V, T](value); ok {
+	if listeners, ok := valueToOneArgEventListeners[V, T](value); ok {
 		if len(listeners) > 0 {
 			properties.setRaw(tag, listeners)
 		} else if properties.getRaw(tag) != nil {
@@ -482,8 +482,8 @@ func setViewEventListener[V View, T any](properties Properties, tag PropertyName
 	return nil
 }
 
-func setEventWithOldListener[V View, T any](properties Properties, tag PropertyName, value any) []PropertyName {
+func setTwoArgEventListener[V View, T any](properties Properties, tag PropertyName, value any) []PropertyName {
-	listeners, ok := valueToEventWithOldListeners[V, T](value)
+	listeners, ok := valueToTwoArgEventListeners[V, T](value)
 	if !ok {
 		notCompatibleType(tag, value)
 		return nil
@@ -498,7 +498,7 @@ func setEventWithOldListener[V View, T any](properties Properties, tag PropertyN
 }
 
 func viewEventsHtml[T any](view View, events []PropertyName, buffer *strings.Builder) {
-	for _, tag := range []PropertyName{AnimationStartEvent, AnimationEndEvent, AnimationIterationEvent, AnimationCancelEvent} {
+	for _, tag := range events {
 		if value := view.getRaw(tag); value != nil {
 			if js, ok := eventJsFunc[tag]; ok {
 				if listeners, ok := value.([]func(View, T)); ok && len(listeners) > 0 {

filePicker.go

@@ -123,8 +123,8 @@ func (picker *filePickerData) init(session Session) {
 	picker.hasHtmlDisabled = true
 	picker.files = []FileInfo{}
 	picker.loader = map[int]func(FileInfo, []byte){}
-	picker.set = filePickerSet
+	picker.set = picker.setFunc
-	picker.changed = filePickerPropertyChanged
+	picker.changed = picker.propertyChanged
 
 }
 
@@ -150,27 +150,16 @@ func (picker *filePickerData) LoadFile(file FileInfo, result func(FileInfo, []by
 	}
 }
 
-func filePickerSet(view View, tag PropertyName, value any) []PropertyName {
+func (picker *filePickerData) setFunc(tag PropertyName, value any) []PropertyName {
-
-	setAccept := func(value string) []PropertyName {
-		if value != "" {
-			view.setRaw(tag, value)
-		} else if view.getRaw(tag) != nil {
-			view.setRaw(tag, nil)
-		} else {
-			return []PropertyName{}
-		}
-		return []PropertyName{Accept}
-	}
 
 	switch tag {
 	case FileSelectedEvent:
-		return setViewEventListener[FilePicker, []FileInfo](view, tag, value)
+		return setOneArgEventListener[FilePicker, []FileInfo](picker, tag, value)
 
 	case Accept:
 		switch value := value.(type) {
 		case string:
-			return setAccept(strings.Trim(value, " \t\n"))
+			return setStringPropertyValue(picker, Accept, strings.Trim(value, " \t\n"))
 
 		case []string:
 			buffer := allocStringBuilder()
@@ -184,27 +173,27 @@ func filePickerSet(view View, tag PropertyName, value any) []PropertyName {
 					buffer.WriteString(val)
 				}
 			}
-			return setAccept(buffer.String())
+			return setStringPropertyValue(picker, Accept, buffer.String())
 		}
 		notCompatibleType(tag, value)
 		return nil
 	}
 
-	return viewSet(view, tag, value)
+	return picker.viewData.setFunc(tag, value)
 }
 
-func filePickerPropertyChanged(view View, tag PropertyName) {
+func (picker *filePickerData) propertyChanged(tag PropertyName) {
 	switch tag {
 	case Accept:
-		session := view.Session()
+		session := picker.Session()
-		if css := acceptPropertyCSS(view); css != "" {
+		if css := acceptPropertyCSS(picker); css != "" {
-			session.updateProperty(view.htmlID(), "accept", css)
+			session.updateProperty(picker.htmlID(), "accept", css)
 		} else {
-			session.removeProperty(view.htmlID(), "accept")
+			session.removeProperty(picker.htmlID(), "accept")
 		}
 
 	default:
-		viewPropertyChanged(view, tag)
+		picker.viewData.propertyChanged(tag)
 	}
 }
 
@@ -381,5 +370,5 @@ func GetFilePickerAccept(view View, subviewID ...string) []string {
 // If there are no listeners then the empty list is returned.
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetFileSelectedListeners(view View, subviewID ...string) []func(FilePicker, []FileInfo) {
-	return getEventListeners[FilePicker, []FileInfo](view, subviewID, FileSelectedEvent)
+	return getOneArgEventListeners[FilePicker, []FileInfo](view, subviewID, FileSelectedEvent)
 }

focusEvents.go

@@ -51,11 +51,11 @@ func focusEventsHtml(view View, buffer *strings.Builder) {
 // GetFocusListeners returns a FocusListener list. If there are no listeners then the empty list is returned
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetFocusListeners(view View, subviewID ...string) []func(View) {
-	return getNoParamEventListeners[View](view, subviewID, FocusEvent)
+	return getNoArgEventListeners[View](view, subviewID, FocusEvent)
 }
 
 // GetLostFocusListeners returns a LostFocusListener list. If there are no listeners then the empty list is returned
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetLostFocusListeners(view View, subviewID ...string) []func(View) {
-	return getNoParamEventListeners[View](view, subviewID, LostFocusEvent)
+	return getNoArgEventListeners[View](view, subviewID, LostFocusEvent)
 }

gridLayout.go

@@ -137,10 +137,10 @@ func (gridLayout *gridLayoutData) init(session Session) {
 	gridLayout.systemClass = "ruiGridLayout"
 	gridLayout.adapter = nil
 	gridLayout.normalize = normalizeGridLayoutTag
-	gridLayout.getFunc = gridLayout.get
+	gridLayout.get = gridLayout.getFunc
 	gridLayout.set = gridLayout.setFunc
 	gridLayout.remove = gridLayout.removeFunc
-
+	gridLayout.changed = gridLayout.propertyChanged
 }
 
 func setGridCellSize(properties Properties, tag PropertyName, value any) []PropertyName {
@@ -303,7 +303,7 @@ func normalizeGridLayoutTag(tag PropertyName) PropertyName {
 	return tag
 }
 
-func (gridLayout *gridLayoutData) get(self View, tag PropertyName) any {
+func (gridLayout *gridLayoutData) getFunc(tag PropertyName) any {
 	switch tag {
 	case Gap:
 		rowGap := GetGridRowGap(gridLayout)
@@ -319,10 +319,10 @@ func (gridLayout *gridLayoutData) get(self View, tag PropertyName) any {
 		}
 	}
 
-	return gridLayout.viewsContainerData.get(gridLayout, tag)
+	return gridLayout.viewsContainerData.getFunc(tag)
 }
 
-func (gridLayout *gridLayoutData) removeFunc(self View, tag PropertyName) []PropertyName {
+func (gridLayout *gridLayoutData) removeFunc(tag PropertyName) []PropertyName {
 	switch tag {
 	case Gap:
 		result := []PropertyName{}
@@ -343,13 +343,13 @@ func (gridLayout *gridLayoutData) removeFunc(self View, tag PropertyName) []Prop
 		return []PropertyName{}
 	}
 
-	return gridLayout.viewsContainerData.removeFunc(gridLayout, tag)
+	return gridLayout.viewsContainerData.removeFunc(tag)
 }
 
-func (gridLayout *gridLayoutData) setFunc(self View, tag PropertyName, value any) []PropertyName {
+func (gridLayout *gridLayoutData) setFunc(tag PropertyName, value any) []PropertyName {
 	switch tag {
 	case Gap:
-		result := gridLayout.setFunc(gridLayout, GridRowGap, value)
+		result := gridLayout.setFunc(GridRowGap, value)
 		if result != nil {
 			if gap := gridLayout.getRaw(GridRowGap); gap != nil {
 				gridLayout.setRaw(GridColumnGap, gap)
@@ -370,21 +370,23 @@ func (gridLayout *gridLayoutData) setFunc(self View, tag PropertyName, value any
 		return []PropertyName{Content}
 	}
 
-	return gridLayout.viewsContainerData.setFunc(gridLayout, tag, value)
+	return gridLayout.viewsContainerData.setFunc(tag, value)
 }
 
-func gridLayoutPropertyChanged(view View, tag PropertyName) {
+func (gridLayout *gridLayoutData) propertyChanged(tag PropertyName) {
 	switch tag {
 	case CellWidth:
-		view.Session().updateCSSProperty(view.htmlID(), `grid-template-columns`,
+		session := gridLayout.Session()
-			gridCellSizesCSS(view, CellWidth, view.Session()))
+		session.updateCSSProperty(gridLayout.htmlID(), `grid-template-columns`,
+			gridCellSizesCSS(gridLayout, CellWidth, session))
 
 	case CellHeight:
-		view.Session().updateCSSProperty(view.htmlID(), `grid-template-rows`,
+		session := gridLayout.Session()
-			gridCellSizesCSS(view, CellHeight, view.Session()))
+		session.updateCSSProperty(gridLayout.htmlID(), `grid-template-rows`,
+			gridCellSizesCSS(gridLayout, CellHeight, session))
 
 	default:
-		viewsContainerPropertyChanged(view, tag)
+		gridLayout.viewsContainerData.propertyChanged(tag)
 	}
 }
 

imageView.go

@@ -97,8 +97,8 @@ func (imageView *imageViewData) init(session Session) {
 	imageView.tag = "ImageView"
 	imageView.systemClass = "ruiImageView"
 	imageView.normalize = normalizeImageViewTag
-	imageView.set = imageViewSet
+	imageView.set = imageView.setFunc
-	imageView.changed = imageViewPropertyChanged
+	imageView.changed = imageView.propertyChanged
 }
 
 func normalizeImageViewTag(tag PropertyName) PropertyName {
@@ -122,30 +122,30 @@ func normalizeImageViewTag(tag PropertyName) PropertyName {
 	return tag
 }
 
-func imageViewSet(view View, tag PropertyName, value any) []PropertyName {
+func (imageView *imageViewData) setFunc(tag PropertyName, value any) []PropertyName {
 
 	switch tag {
 	case Source, SrcSet, AltText:
 		if text, ok := value.(string); ok {
-			return setStringPropertyValue(view, tag, text)
+			return setStringPropertyValue(imageView, tag, text)
 		}
 		notCompatibleType(tag, value)
 		return nil
 
 	case LoadedEvent, ErrorEvent:
-		return setNoParamEventListener[ImageView](view, tag, value)
+		return setNoArgEventListener[ImageView](imageView, tag, value)
 	}
 
-	return viewSet(view, tag, value)
+	return imageView.viewData.setFunc(tag, value)
 }
 
-func imageViewPropertyChanged(view View, tag PropertyName) {
+func (imageView *imageViewData) propertyChanged(tag PropertyName) {
-	session := view.Session()
+	session := imageView.Session()
-	htmlID := view.htmlID()
+	htmlID := imageView.htmlID()
 
 	switch tag {
 	case Source:
-		src, srcset := imageViewSrc(view, GetImageViewSource(view))
+		src, srcset := imageViewSrc(imageView, GetImageViewSource(imageView))
 		session.updateProperty(htmlID, "src", src)
 		if srcset != "" {
 			session.updateProperty(htmlID, "srcset", srcset)
@@ -154,7 +154,7 @@ func imageViewPropertyChanged(view View, tag PropertyName) {
 		}
 
 	case SrcSet:
-		_, srcset := imageViewSrc(view, GetImageViewSource(view))
+		_, srcset := imageViewSrc(imageView, GetImageViewSource(imageView))
 		if srcset != "" {
 			session.updateProperty(htmlID, "srcset", srcset)
 		} else {
@@ -168,7 +168,7 @@ func imageViewPropertyChanged(view View, tag PropertyName) {
 		updateCSSStyle(htmlID, session)
 
 	default:
-		viewPropertyChanged(view, tag)
+		imageView.viewData.propertyChanged(tag)
 	}
 }
 
@@ -256,7 +256,7 @@ func (imageView *imageViewData) htmlProperties(self View, buffer *strings.Builde
 
 	buffer.WriteString(` onload="imageLoaded(this, event)"`)
 
-	if len(getNoParamEventListeners[ImageView](imageView, nil, ErrorEvent)) > 0 {
+	if len(getNoArgEventListeners[ImageView](imageView, nil, ErrorEvent)) > 0 {
 		buffer.WriteString(` onerror="imageError(this, event)"`)
 	}
 }
@@ -299,7 +299,7 @@ func (imageView *imageViewData) cssStyle(self View, builder cssBuilder) {
 func (imageView *imageViewData) handleCommand(self View, command PropertyName, data DataObject) bool {
 	switch command {
 	case "imageViewError":
-		for _, listener := range getNoParamEventListeners[ImageView](imageView, nil, ErrorEvent) {
+		for _, listener := range getNoArgEventListeners[ImageView](imageView, nil, ErrorEvent) {
 			listener(imageView)
 		}
 
@@ -308,7 +308,7 @@ func (imageView *imageViewData) handleCommand(self View, command PropertyName, d
 		imageView.naturalHeight = dataFloatProperty(data, "natural-height")
 		imageView.currentSrc, _ = data.PropertyValue("current-src")
 
-		for _, listener := range getNoParamEventListeners[ImageView](imageView, nil, LoadedEvent) {
+		for _, listener := range getNoArgEventListeners[ImageView](imageView, nil, LoadedEvent) {
 			listener(imageView)
 		}
 

keyEvents.go

@@ -431,7 +431,7 @@ func (event *KeyEvent) init(data DataObject) {
 
 /*
 func setKeyListener(properties Properties, tag PropertyName, value any) bool {
-	if listeners, ok := valueToEventListeners[View, KeyEvent](value); ok {
+	if listeners, ok := valueToOneArgEventListeners[View, KeyEvent](value); ok {
 		if len(listeners) == 0 {
 			properties.setRaw(tag, nil)
 		} else {
@@ -460,15 +460,15 @@ func (view *viewData) removeKeyListener(tag PropertyName) {
 */
 
 func keyEventsHtml(view View, buffer *strings.Builder) {
-	if len(getEventListeners[View, KeyEvent](view, nil, KeyDownEvent)) > 0 {
+	if len(getOneArgEventListeners[View, KeyEvent](view, nil, KeyDownEvent)) > 0 {
 		buffer.WriteString(`onkeydown="keyDownEvent(this, event)" `)
 	} else if view.Focusable() {
-		if len(getEventListeners[View, MouseEvent](view, nil, ClickEvent)) > 0 {
+		if len(getOneArgEventListeners[View, MouseEvent](view, nil, ClickEvent)) > 0 {
 			buffer.WriteString(`onkeydown="keyDownEvent(this, event)" `)
 		}
 	}
 
-	if listeners := getEventListeners[View, KeyEvent](view, nil, KeyUpEvent); len(listeners) > 0 {
+	if listeners := getOneArgEventListeners[View, KeyEvent](view, nil, KeyUpEvent); len(listeners) > 0 {
 		buffer.WriteString(`onkeyup="keyUpEvent(this, event)" `)
 	}
 }
@@ -476,7 +476,7 @@ func keyEventsHtml(view View, buffer *strings.Builder) {
 func handleKeyEvents(view View, tag PropertyName, data DataObject) {
 	var event KeyEvent
 	event.init(data)
-	listeners := getEventListeners[View, KeyEvent](view, nil, tag)
+	listeners := getOneArgEventListeners[View, KeyEvent](view, nil, tag)
 
 	if len(listeners) > 0 {
 		for _, listener := range listeners {
@@ -486,7 +486,7 @@ func handleKeyEvents(view View, tag PropertyName, data DataObject) {
 	}
 
 	if tag == KeyDownEvent && view.Focusable() && (event.Key == " " || event.Key == "Enter") && !IsDisabled(view) {
-		if listeners := getEventListeners[View, MouseEvent](view, nil, ClickEvent); len(listeners) > 0 {
+		if listeners := getOneArgEventListeners[View, MouseEvent](view, nil, ClickEvent); len(listeners) > 0 {
 			clickEvent := MouseEvent{
 				TimeStamp: event.TimeStamp,
 				Button:    PrimaryMouseButton,
@@ -512,11 +512,11 @@ func handleKeyEvents(view View, tag PropertyName, data DataObject) {
 // GetKeyDownListeners returns the "key-down-event" listener list. If there are no listeners then the empty list is returned.
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetKeyDownListeners(view View, subviewID ...string) []func(View, KeyEvent) {
-	return getEventListeners[View, KeyEvent](view, subviewID, KeyDownEvent)
+	return getOneArgEventListeners[View, KeyEvent](view, subviewID, KeyDownEvent)
 }
 
 // GetKeyUpListeners returns the "key-up-event" listener list. If there are no listeners then the empty list is returned.
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetKeyUpListeners(view View, subviewID ...string) []func(View, KeyEvent) {
-	return getEventListeners[View, KeyEvent](view, subviewID, KeyUpEvent)
+	return getOneArgEventListeners[View, KeyEvent](view, subviewID, KeyUpEvent)
 }

listLayout.go

@@ -64,10 +64,10 @@ func (listLayout *listLayoutData) init(session Session) {
 	listLayout.tag = "ListLayout"
 	listLayout.systemClass = "ruiListLayout"
 	listLayout.normalize = normalizeListLayoutTag
-	listLayout.getFunc = listLayout.get
+	listLayout.get = listLayout.getFunc
 	listLayout.set = listLayout.setFunc
 	listLayout.remove = listLayout.removeFunc
-	listLayout.changed = listLayoutPropertyChanged
+	listLayout.changed = listLayout.propertyChanged
 
 }
 
@@ -86,7 +86,7 @@ func normalizeListLayoutTag(tag PropertyName) PropertyName {
 	return tag
 }
 
-func (listLayout *listLayoutData) get(self View, tag PropertyName) any {
+func (listLayout *listLayoutData) getFunc(tag PropertyName) any {
 	switch tag {
 	case Gap:
 		if rowGap := GetListRowGap(listLayout); rowGap.Equal(GetListColumnGap(listLayout)) {
@@ -100,10 +100,10 @@ func (listLayout *listLayoutData) get(self View, tag PropertyName) any {
 		}
 	}
 
-	return listLayout.viewsContainerData.get(listLayout, tag)
+	return listLayout.viewsContainerData.getFunc(tag)
 }
 
-func (listLayout *listLayoutData) removeFunc(self View, tag PropertyName) []PropertyName {
+func (listLayout *listLayoutData) removeFunc(tag PropertyName) []PropertyName {
 	switch tag {
 	case Gap:
 		result := []PropertyName{}
@@ -116,18 +116,18 @@ func (listLayout *listLayoutData) removeFunc(self View, tag PropertyName) []Prop
 		return result
 
 	case Content:
-		listLayout.viewsContainerData.removeFunc(listLayout, Content)
+		listLayout.viewsContainerData.removeFunc(Content)
 		listLayout.adapter = nil
 		return []PropertyName{Content}
 	}
 
-	return listLayout.viewsContainerData.removeFunc(listLayout, tag)
+	return listLayout.viewsContainerData.removeFunc(tag)
 }
 
-func (listLayout *listLayoutData) setFunc(self View, tag PropertyName, value any) []PropertyName {
+func (listLayout *listLayoutData) setFunc(tag PropertyName, value any) []PropertyName {
 	switch tag {
 	case Gap:
-		result := listLayout.setFunc(listLayout, ListRowGap, value)
+		result := listLayout.setFunc(ListRowGap, value)
 		if result != nil {
 			if gap := listLayout.getRaw(ListRowGap); gap != nil {
 				listLayout.setRaw(ListColumnGap, gap)
@@ -147,16 +147,16 @@ func (listLayout *listLayoutData) setFunc(self View, tag PropertyName, value any
 		}
 		return []PropertyName{Content}
 	}
-	return listLayout.viewsContainerData.setFunc(listLayout, tag, value)
+	return listLayout.viewsContainerData.setFunc(tag, value)
 }
 
-func listLayoutPropertyChanged(view View, tag PropertyName) {
+func (listLayout *listLayoutData) propertyChanged(tag PropertyName) {
 	switch tag {
 	case Orientation, ListWrap, HorizontalAlign, VerticalAlign:
-		updateCSSStyle(view.htmlID(), view.Session())
+		updateCSSStyle(listLayout.htmlID(), listLayout.Session())
 
 	default:
-		viewsContainerPropertyChanged(view, tag)
+		listLayout.viewsContainerData.propertyChanged(tag)
 	}
 }
 

listView.go

@@ -148,11 +148,10 @@ func (listView *listViewData) init(session Session) {
 	listView.items = []View{}
 	listView.itemFrame = []Frame{}
 	listView.normalize = normalizeListViewTag
-	listView.getFunc = listView.get
+	listView.get = listView.getFunc
-	listView.set = listViewSet
+	listView.set = listView.setFunc
-	listView.changed = listViewPropertyChanged
+	listView.remove = listView.removeFunc
-	listView.remove = listViewRemove
+	listView.changed = listView.propertyChanged
-
 }
 
 func (listView *listViewData) Views() []View {
@@ -183,36 +182,36 @@ func normalizeListViewTag(tag PropertyName) PropertyName {
 	return tag
 }
 
-func listViewRemove(view View, tag PropertyName) []PropertyName {
+func (listView *listViewData) removeFunc(tag PropertyName) []PropertyName {
 	switch tag {
 	case Gap:
-		result := viewRemove(view, ListRowGap)
+		result := listView.removeFunc(ListRowGap)
 		if result != nil {
-			if result2 := viewRemove(view, ListColumnGap); result2 != nil {
+			if result2 := listView.removeFunc(ListColumnGap); result2 != nil {
 				result = append(result, result2...)
 			}
 		}
 		return result
 	}
-	return viewRemove(view, tag)
+	return listView.viewData.removeFunc(tag)
 }
 
-func listViewSet(view View, tag PropertyName, value any) []PropertyName {
+func (listView *listViewData) setFunc(tag PropertyName, value any) []PropertyName {
 	switch tag {
 	case Gap:
-		result := listViewSet(view, ListRowGap, value)
+		result := listView.setFunc(ListRowGap, value)
 		if result != nil {
-			if result2 := listViewSet(view, ListColumnGap, value); result2 != nil {
+			if result2 := listView.setFunc(ListColumnGap, value); result2 != nil {
 				result = append(result, result2...)
 			}
 		}
 		return result
 
 	case ListItemClickedEvent, ListItemSelectedEvent:
-		return setViewEventListener[ListView, int](view, tag, value)
+		return setOneArgEventListener[ListView, int](listView, tag, value)
 
 	case ListItemCheckedEvent:
-		return setViewEventListener[ListView, []int](view, tag, value)
+		return setOneArgEventListener[ListView, []int](listView, tag, value)
 
 	case Checked:
 		var checked []int
@@ -243,69 +242,65 @@ func listViewSet(view View, tag PropertyName, value any) []PropertyName {
 			return nil
 		}
 
-		return setArrayPropertyValue(view, Checked, checked)
+		return setArrayPropertyValue(listView, Checked, checked)
 
 	case Items:
-		return listViewSetItems(view, value)
+		return listView.setItems(value)
 
 	case ListItemStyle, CurrentStyle, CurrentInactiveStyle:
 		if text, ok := value.(string); ok {
-			return setStringPropertyValue(view, tag, text)
+			return setStringPropertyValue(listView, tag, text)
 		}
 		notCompatibleType(tag, value)
 		return nil
 
 	case Current:
-		return setIntProperty(view, Current, value)
+		return setIntProperty(listView, Current, value)
 	}
 
-	return viewSet(view, tag, value)
+	return listView.viewData.setFunc(tag, value)
 
 }
 
-func listViewPropertyChanged(view View, tag PropertyName) {
+func (listView *listViewData) propertyChanged(tag PropertyName) {
 	switch tag {
 
 	case Current:
-		updateInnerHTML(view.htmlID(), view.Session())
+		updateInnerHTML(listView.htmlID(), listView.Session())
-		if listeners := getEventListeners[ListView, int](view, nil, ListItemSelectedEvent); len(listeners) > 0 {
+		if listeners := getOneArgEventListeners[ListView, int](listView, nil, ListItemSelectedEvent); len(listeners) > 0 {
-			if listView, ok := view.(ListView); ok {
+			current := GetCurrent(listView)
-				current := GetCurrent(view)
 			for _, listener := range listeners {
 				listener(listView, current)
 			}
 		}
-		}
 
 	case Checked:
-		updateInnerHTML(view.htmlID(), view.Session())
+		updateInnerHTML(listView.htmlID(), listView.Session())
-		if listeners := getEventListeners[ListView, []int](view, nil, ListItemCheckedEvent); len(listeners) > 0 {
+		if listeners := getOneArgEventListeners[ListView, []int](listView, nil, ListItemCheckedEvent); len(listeners) > 0 {
-			if listView, ok := view.(ListView); ok {
+			checked := GetListViewCheckedItems(listView)
-				checked := GetListViewCheckedItems(view)
 			for _, listener := range listeners {
 				listener(listView, checked)
 			}
 		}
-		}
 
 	case Items, Orientation, ListWrap, ListRowGap, ListColumnGap, VerticalAlign, HorizontalAlign, Style, StyleDisabled, ItemWidth, ItemHeight,
 		ItemHorizontalAlign, ItemVerticalAlign, ItemCheckbox, CheckboxHorizontalAlign, CheckboxVerticalAlign, ListItemStyle, AccentColor:
-		updateInnerHTML(view.htmlID(), view.Session())
+		updateInnerHTML(listView.htmlID(), listView.Session())
 
 	case CurrentStyle:
-		view.Session().updateProperty(view.htmlID(), "data-focusitemstyle", listViewCurrentStyle(view))
+		listView.Session().updateProperty(listView.htmlID(), "data-focusitemstyle", listViewCurrentStyle(listView))
-		updateInnerHTML(view.htmlID(), view.Session())
+		updateInnerHTML(listView.htmlID(), listView.Session())
 
 	case CurrentInactiveStyle:
-		view.Session().updateProperty(view.htmlID(), "data-bluritemstyle", listViewCurrentInactiveStyle(view))
+		listView.Session().updateProperty(listView.htmlID(), "data-bluritemstyle", listViewCurrentInactiveStyle(listView))
-		updateInnerHTML(view.htmlID(), view.Session())
+		updateInnerHTML(listView.htmlID(), listView.Session())
 
 	default:
-		viewPropertyChanged(view, tag)
+		listView.viewData.propertyChanged(tag)
 	}
 }
 
-func (listView *listViewData) get(self View, tag PropertyName) any {
+func (listView *listViewData) getFunc(tag PropertyName) any {
 	switch tag {
 	case Gap:
 		if rowGap := GetListRowGap(listView); rowGap.Equal(GetListColumnGap(listView)) {
@@ -313,16 +308,13 @@ func (listView *listViewData) get(self View, tag PropertyName) any {
 		}
 		return AutoSize()
 	}
-	return viewGet(self, tag)
+	return listView.viewData.getFunc(tag)
 }
 
-func listViewSetItems(properties Properties, value any) []PropertyName {
+func (listView *listViewData) setItems(value any) []PropertyName {
 	var adapter ListAdapter = nil
 
-	var session Session = nil
+	session := listView.session
-	if view, ok := properties.(View); ok {
-		session = view.Session()
-	}
 
 	switch value := value.(type) {
 	case []string:
@@ -400,7 +392,7 @@ func listViewSetItems(properties Properties, value any) []PropertyName {
 		return nil
 	}
 
-	properties.setRaw(Items, adapter)
+	listView.setRaw(Items, adapter)
 	return []PropertyName{Items}
 }
 
@@ -951,7 +943,9 @@ func (listView *listViewData) handleCommand(self View, command PropertyName, dat
 		}
 
 	case "itemClick":
-		listView.onItemClick()
+		if number, ok := dataIntProperty(data, `number`); ok {
+			listView.onItemClick(number)
+		}
 
 	default:
 		return listView.viewData.handleCommand(self, command, data)
@@ -962,7 +956,7 @@ func (listView *listViewData) handleCommand(self View, command PropertyName, dat
 
 func (listView *listViewData) handleCurrent(number int) {
 	listView.properties[Current] = number
-	for _, listener := range getEventListeners[ListView, int](listView, nil, ListItemSelectedEvent) {
+	for _, listener := range getOneArgEventListeners[ListView, int](listView, nil, ListItemSelectedEvent) {
 		listener(listView, number)
 	}
 	if listener, ok := listView.changeListener[Current]; ok {
@@ -970,33 +964,37 @@ func (listView *listViewData) handleCurrent(number int) {
 	}
 }
 
-func (listView *listViewData) onItemClick() {
+func (listView *listViewData) onItemClick(number int) {
-	checkbox := GetListViewCheckbox(listView)
+
-	if checkbox == NoneCheckbox {
+	if IsDisabled(listView) {
 		return
 	}
 
-	if current := GetCurrent(listView); current >= 0 && !IsDisabled(listView) {
+	if current := GetCurrent(listView); current != number {
+		listView.Set(Current, number)
+	}
+
+	if checkbox := GetListViewCheckbox(listView); checkbox != NoneCheckbox {
 		checkedItem := GetListViewCheckedItems(listView)
 
 		switch checkbox {
 		case SingleCheckbox:
 			if len(checkedItem) == 0 {
-				checkedItem = []int{current}
+				checkedItem = []int{number}
-				listView.updateCheckboxItem(current, true)
+				listView.updateCheckboxItem(number, true)
-			} else if checkedItem[0] != current {
+			} else if checkedItem[0] != number {
 				listView.updateCheckboxItem(checkedItem[0], false)
-				checkedItem = []int{current}
+				checkedItem = []int{number}
-				listView.updateCheckboxItem(current, true)
+				listView.updateCheckboxItem(number, true)
 			} else {
 				checkedItem = []int{}
-				listView.updateCheckboxItem(current, false)
+				listView.updateCheckboxItem(number, false)
 			}
 
 		case MultipleCheckbox:
 			uncheck := false
 			for i, index := range checkedItem {
-				if index == current {
+				if index == number {
 					uncheck = true
 					listView.updateCheckboxItem(index, false)
 					count := len(checkedItem)
@@ -1014,8 +1012,8 @@ func (listView *listViewData) onItemClick() {
 			}
 
 			if !uncheck {
-				listView.updateCheckboxItem(current, true)
+				listView.updateCheckboxItem(number, true)
-				checkedItem = append(checkedItem, current)
+				checkedItem = append(checkedItem, number)
 			}
 		}
 
@@ -1024,10 +1022,15 @@ func (listView *listViewData) onItemClick() {
 			listener(listView, Checked)
 		}
 
-		for _, listener := range getEventListeners[ListView, []int](listView, nil, ListItemCheckedEvent) {
+		for _, listener := range getOneArgEventListeners[ListView, []int](listView, nil, ListItemCheckedEvent) {
 			listener(listView, checkedItem)
 		}
 	}
+
+	for _, listener := range getOneArgEventListeners[ListView, int](listView, nil, ListItemClickedEvent) {
+		listener(listView, number)
+	}
+
 }
 
 func (listView *listViewData) onItemResize(self View, index string, x, y, width, height float64) {
@@ -1057,21 +1060,21 @@ func GetHorizontalAlign(view View, subviewID ...string) int {
 // If there are no listeners then the empty list is returned
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetListItemClickedListeners(view View, subviewID ...string) []func(ListView, int) {
-	return getEventListeners[ListView, int](view, subviewID, ListItemClickedEvent)
+	return getOneArgEventListeners[ListView, int](view, subviewID, ListItemClickedEvent)
 }
 
 // GetListItemSelectedListeners returns a ListItemSelectedListener of the ListView.
 // If there are no listeners then the empty list is returned
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetListItemSelectedListeners(view View, subviewID ...string) []func(ListView, int) {
-	return getEventListeners[ListView, int](view, subviewID, ListItemSelectedEvent)
+	return getOneArgEventListeners[ListView, int](view, subviewID, ListItemSelectedEvent)
 }
 
 // GetListItemCheckedListeners returns a ListItemCheckedListener of the ListView.
 // If there are no listeners then the empty list is returned
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetListItemCheckedListeners(view View, subviewID ...string) []func(ListView, []int) {
-	return getEventListeners[ListView, []int](view, subviewID, ListItemCheckedEvent)
+	return getOneArgEventListeners[ListView, []int](view, subviewID, ListItemCheckedEvent)
 }
 
 // GetListItemWidth returns the width of a ListView item.

mediaPlayer.go

@@ -907,46 +907,39 @@ type MediaSource struct {
 func (player *mediaPlayerData) init(session Session) {
 	player.viewData.init(session)
 	player.tag = "MediaPlayer"
-	player.set = mediaPlayerSet
+	player.set = player.setFunc
-	player.changed = mediaPlayerPropertyChanged
+	player.changed = player.propertyChanged
 }
 
 func (player *mediaPlayerData) Focusable() bool {
 	return true
 }
 
-func mediaPlayerSet(view View, tag PropertyName, value any) []PropertyName {
+func (player *mediaPlayerData) setFunc(tag PropertyName, value any) []PropertyName {
 	switch tag {
 
 	case AbortEvent, CanPlayEvent, CanPlayThroughEvent, CompleteEvent, EmptiedEvent, LoadStartEvent,
 		EndedEvent, LoadedDataEvent, LoadedMetadataEvent, PauseEvent, PlayEvent, PlayingEvent,
 		ProgressEvent, SeekedEvent, SeekingEvent, StalledEvent, SuspendEvent, WaitingEvent:
 
-		return setNoParamEventListener[MediaPlayer](view, tag, value)
+		return setNoArgEventListener[MediaPlayer](player, tag, value)
 
 	case DurationChangedEvent, RateChangedEvent, TimeUpdateEvent, VolumeChangedEvent:
 
-		return setViewEventListener[MediaPlayer, float64](view, tag, value)
+		return setOneArgEventListener[MediaPlayer, float64](player, tag, value)
 
 	case PlayerErrorEvent:
 		if listeners, ok := valueToPlayerErrorListeners(value); ok {
-			if len(listeners) > 0 {
+			return setArrayPropertyValue(player, tag, listeners)
-				view.setRaw(tag, listeners)
-			} else if view.getRaw(tag) != nil {
-				view.setRaw(tag, nil)
-			} else {
-				return []PropertyName{}
-			}
-			return []PropertyName{tag}
 		}
 		notCompatibleType(tag, value)
 		return nil
 
 	case Source:
-		return setMediaPlayerSource(view, value)
+		return setMediaPlayerSource(player, value)
 	}
 
-	return viewSet(view, tag, value)
+	return player.viewData.setFunc(tag, value)
 }
 
 func setMediaPlayerSource(properties Properties, value any) []PropertyName {
@@ -1151,26 +1144,26 @@ func mediaPlayerEvents() map[PropertyName]string {
 	}
 }
 
-func mediaPlayerPropertyChanged(view View, tag PropertyName) {
+func (player *mediaPlayerData) propertyChanged(tag PropertyName) {
-	session := view.Session()
+	session := player.Session()
 
 	switch tag {
 	case Controls, Loop:
-		value, _ := boolProperty(view, tag, session)
+		value, _ := boolProperty(player, tag, session)
 		if value {
-			session.updateProperty(view.htmlID(), string(tag), value)
+			session.updateProperty(player.htmlID(), string(tag), value)
 		} else {
-			session.removeProperty(view.htmlID(), string(tag))
+			session.removeProperty(player.htmlID(), string(tag))
 		}
 
 	case Muted:
-		value, _ := boolProperty(view, Muted, session)
+		value, _ := boolProperty(player, Muted, session)
-		session.callFunc("setMediaMuted", view.htmlID(), value)
+		session.callFunc("setMediaMuted", player.htmlID(), value)
 
 	case Preload:
-		value, _ := enumProperty(view, Preload, session, 0)
+		value, _ := enumProperty(player, Preload, session, 0)
 		values := enumProperties[Preload].values
-		session.updateProperty(view.htmlID(), string(Preload), values[value])
+		session.updateProperty(player.htmlID(), string(Preload), values[value])
 
 	case AbortEvent, CanPlayEvent, CanPlayThroughEvent, CompleteEvent, EmptiedEvent,
 		EndedEvent, LoadedDataEvent, LoadedMetadataEvent, PauseEvent, PlayEvent, PlayingEvent, ProgressEvent,
@@ -1178,54 +1171,54 @@ func mediaPlayerPropertyChanged(view View, tag PropertyName) {
 
 		if cssTag, ok := mediaPlayerEvents()[tag]; ok {
 			fn := ""
-			if value := view.getRaw(tag); value != nil {
+			if value := player.getRaw(tag); value != nil {
 				if listeners, ok := value.([]func(MediaPlayer)); ok && len(listeners) > 0 {
 					fn = fmt.Sprintf(`viewEvent(this, "%s")`, string(tag))
 				}
 			}
-			session.updateProperty(view.htmlID(), cssTag, fn)
+			session.updateProperty(player.htmlID(), cssTag, fn)
 		}
 
 	case TimeUpdateEvent:
-		if value := view.getRaw(tag); value != nil {
+		if value := player.getRaw(tag); value != nil {
-			session.updateProperty(view.htmlID(), "ontimeupdate", "viewTimeUpdatedEvent(this)")
+			session.updateProperty(player.htmlID(), "ontimeupdate", "viewTimeUpdatedEvent(this)")
 		} else {
-			session.updateProperty(view.htmlID(), "ontimeupdate", "")
+			session.updateProperty(player.htmlID(), "ontimeupdate", "")
 		}
 
 	case VolumeChangedEvent:
-		if value := view.getRaw(tag); value != nil {
+		if value := player.getRaw(tag); value != nil {
-			session.updateProperty(view.htmlID(), "onvolumechange", "viewVolumeChangedEvent(this)")
+			session.updateProperty(player.htmlID(), "onvolumechange", "viewVolumeChangedEvent(this)")
 		} else {
-			session.updateProperty(view.htmlID(), "onvolumechange", "")
+			session.updateProperty(player.htmlID(), "onvolumechange", "")
 		}
 
 	case DurationChangedEvent:
-		if value := view.getRaw(tag); value != nil {
+		if value := player.getRaw(tag); value != nil {
-			session.updateProperty(view.htmlID(), "ondurationchange", "viewDurationChangedEvent(this)")
+			session.updateProperty(player.htmlID(), "ondurationchange", "viewDurationChangedEvent(this)")
 		} else {
-			session.updateProperty(view.htmlID(), "ondurationchange", "")
+			session.updateProperty(player.htmlID(), "ondurationchange", "")
 		}
 
 	case RateChangedEvent:
-		if value := view.getRaw(tag); value != nil {
+		if value := player.getRaw(tag); value != nil {
-			session.updateProperty(view.htmlID(), "onratechange", "viewRateChangedEvent(this)")
+			session.updateProperty(player.htmlID(), "onratechange", "viewRateChangedEvent(this)")
 		} else {
-			session.updateProperty(view.htmlID(), "onratechange", "")
+			session.updateProperty(player.htmlID(), "onratechange", "")
 		}
 
 	case PlayerErrorEvent:
-		if value := view.getRaw(tag); value != nil {
+		if value := player.getRaw(tag); value != nil {
-			session.updateProperty(view.htmlID(), "onerror", "viewErrorEvent(this)")
+			session.updateProperty(player.htmlID(), "onerror", "viewErrorEvent(this)")
 		} else {
-			session.updateProperty(view.htmlID(), "onerror", "")
+			session.updateProperty(player.htmlID(), "onerror", "")
 		}
 
 	case Source:
-		updateInnerHTML(view.htmlID(), session)
+		updateInnerHTML(player.htmlID(), session)
 
 	default:
-		viewPropertyChanged(view, tag)
+		player.viewData.propertyChanged(tag)
 	}
 
 }

mouseEvents.go

@@ -230,7 +230,7 @@ type MouseEvent struct {
 
 /*
 func setMouseListener(properties Properties, tag PropertyName, value any) bool {
-	if listeners, ok := valueToEventListeners[View, MouseEvent](value); ok {
+	if listeners, ok := valueToOneArgEventListeners[View, MouseEvent](value); ok {
 		if len(listeners) == 0 {
 			properties.setRaw(tag, nil)
 		} else {
@@ -302,7 +302,7 @@ func (event *MouseEvent) init(data DataObject) {
 }
 
 func handleMouseEvents(view View, tag PropertyName, data DataObject) {
-	listeners := getEventListeners[View, MouseEvent](view, nil, tag)
+	listeners := getOneArgEventListeners[View, MouseEvent](view, nil, tag)
 	if len(listeners) > 0 {
 		var event MouseEvent
 		event.init(data)
@@ -316,48 +316,48 @@ func handleMouseEvents(view View, tag PropertyName, data DataObject) {
 // GetClickListeners returns the "click-event" listener list. If there are no listeners then the empty list is returned.
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetClickListeners(view View, subviewID ...string) []func(View, MouseEvent) {
-	return getEventListeners[View, MouseEvent](view, subviewID, ClickEvent)
+	return getOneArgEventListeners[View, MouseEvent](view, subviewID, ClickEvent)
 }
 
 // GetDoubleClickListeners returns the "double-click-event" listener list. If there are no listeners then the empty list is returned.
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetDoubleClickListeners(view View, subviewID ...string) []func(View, MouseEvent) {
-	return getEventListeners[View, MouseEvent](view, subviewID, DoubleClickEvent)
+	return getOneArgEventListeners[View, MouseEvent](view, subviewID, DoubleClickEvent)
 }
 
 // GetContextMenuListeners returns the "context-menu" listener list.
 // If there are no listeners then the empty list is returned.
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetContextMenuListeners(view View, subviewID ...string) []func(View, MouseEvent) {
-	return getEventListeners[View, MouseEvent](view, subviewID, ContextMenuEvent)
+	return getOneArgEventListeners[View, MouseEvent](view, subviewID, ContextMenuEvent)
 }
 
 // GetMouseDownListeners returns the "mouse-down" listener list. If there are no listeners then the empty list is returned.
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetMouseDownListeners(view View, subviewID ...string) []func(View, MouseEvent) {
-	return getEventListeners[View, MouseEvent](view, subviewID, MouseDown)
+	return getOneArgEventListeners[View, MouseEvent](view, subviewID, MouseDown)
 }
 
 // GetMouseUpListeners returns the "mouse-up" listener list. If there are no listeners then the empty list is returned.
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetMouseUpListeners(view View, subviewID ...string) []func(View, MouseEvent) {
-	return getEventListeners[View, MouseEvent](view, subviewID, MouseUp)
+	return getOneArgEventListeners[View, MouseEvent](view, subviewID, MouseUp)
 }
 
 // GetMouseMoveListeners returns the "mouse-move" listener list. If there are no listeners then the empty list is returned.
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetMouseMoveListeners(view View, subviewID ...string) []func(View, MouseEvent) {
-	return getEventListeners[View, MouseEvent](view, subviewID, MouseMove)
+	return getOneArgEventListeners[View, MouseEvent](view, subviewID, MouseMove)
 }
 
 // GetMouseOverListeners returns the "mouse-over" listener list. If there are no listeners then the empty list is returned.
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetMouseOverListeners(view View, subviewID ...string) []func(View, MouseEvent) {
-	return getEventListeners[View, MouseEvent](view, subviewID, MouseOver)
+	return getOneArgEventListeners[View, MouseEvent](view, subviewID, MouseOver)
 }
 
 // GetMouseOutListeners returns the "mouse-out" listener list. If there are no listeners then the empty list is returned.
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetMouseOutListeners(view View, subviewID ...string) []func(View, MouseEvent) {
-	return getEventListeners[View, MouseEvent](view, subviewID, MouseOut)
+	return getOneArgEventListeners[View, MouseEvent](view, subviewID, MouseOut)
 }

numberPicker.go

@@ -1,6 +1,7 @@
 package rui
 
 import (
+	"fmt"
 	"math"
 	"strconv"
 	"strings"
@@ -79,6 +80,16 @@ const (
 	//
 	// Internal type is `float`, other types converted to it during assignment.
 	NumberPickerValue PropertyName = "number-picker-value"
+
+	// NumberPickerValue is the constant for "number-picker-value" property tag.
+	//
+	// Used by `NumberPicker`.
+	// Precision of displaying fractional part in editor. The default value is 0 (not used).
+	//
+	// Supported types: `int`, `int8`...`int64`, `uint`, `uint8`...`uint64`, `string`.
+	//
+	// Internal type is `float`, other types converted to it during assignment.
+	NumberPickerPrecision PropertyName = "number-picker-precision"
 )
 
 // Constants which describe values of the "number-picker-type" property of a [NumberPicker]
@@ -116,8 +127,8 @@ func (picker *numberPickerData) init(session Session) {
 	picker.tag = "NumberPicker"
 	picker.hasHtmlDisabled = true
 	picker.normalize = normalizeNumberPickerTag
-	picker.set = numberPickerSet
+	picker.set = picker.setFunc
-	picker.changed = numberPickerPropertyChanged
+	picker.changed = picker.propertyChanged
 }
 
 func (picker *numberPickerData) Focusable() bool {
@@ -127,73 +138,83 @@ func (picker *numberPickerData) Focusable() bool {
 func normalizeNumberPickerTag(tag PropertyName) PropertyName {
 	tag = defaultNormalize(tag)
 	switch tag {
-	case Type, Min, Max, Step, Value:
+	case Type, Min, Max, Step, Value, "precision":
 		return "number-picker-" + tag
 	}
 
 	return normalizeDataListTag(tag)
 }
 
-func numberPickerSet(view View, tag PropertyName, value any) []PropertyName {
+func (picker *numberPickerData) setFunc(tag PropertyName, value any) []PropertyName {
 	switch tag {
 	case NumberChangedEvent:
-		return setEventWithOldListener[NumberPicker, float64](view, tag, value)
+		return setTwoArgEventListener[NumberPicker, float64](picker, tag, value)
 
 	case NumberPickerValue:
-		view.setRaw("old-number", GetNumberPickerValue(view))
+		picker.setRaw("old-number", GetNumberPickerValue(picker))
-		min, max := GetNumberPickerMinMax(view)
+		min, max := GetNumberPickerMinMax(picker)
 
-		return setFloatProperty(view, NumberPickerValue, value, min, max)
+		return setFloatProperty(picker, NumberPickerValue, value, min, max)
 
 	case DataList:
-		return setDataList(view, value, "")
+		return setDataList(picker, value, "")
 	}
 
-	return viewSet(view, tag, value)
+	return picker.viewData.setFunc(tag, value)
 }
 
-func numberPickerPropertyChanged(view View, tag PropertyName) {
+func (picker *numberPickerData) numberFormat() string {
+	if precission := GetNumberPickerPrecision(picker); precission > 0 {
+		return fmt.Sprintf("%%.%df", precission)
+	}
+	return "%g"
+}
+
+func (picker *numberPickerData) propertyChanged(tag PropertyName) {
 	switch tag {
 	case NumberPickerType:
-		if GetNumberPickerType(view) == NumberSlider {
+		if GetNumberPickerType(picker) == NumberSlider {
-			view.Session().updateProperty(view.htmlID(), "type", "range")
+			picker.Session().updateProperty(picker.htmlID(), "type", "range")
 		} else {
-			view.Session().updateProperty(view.htmlID(), "type", "number")
+			picker.Session().updateProperty(picker.htmlID(), "type", "number")
 		}
 
 	case NumberPickerMin:
-		min, _ := GetNumberPickerMinMax(view)
+		min, _ := GetNumberPickerMinMax(picker)
-		view.Session().updateProperty(view.htmlID(), "min", strconv.FormatFloat(min, 'f', -1, 32))
+		picker.Session().updateProperty(picker.htmlID(), "min", fmt.Sprintf(picker.numberFormat(), min))
 
 	case NumberPickerMax:
-		_, max := GetNumberPickerMinMax(view)
+		_, max := GetNumberPickerMinMax(picker)
-		view.Session().updateProperty(view.htmlID(), "max", strconv.FormatFloat(max, 'f', -1, 32))
+		picker.Session().updateProperty(picker.htmlID(), "max", fmt.Sprintf(picker.numberFormat(), max))
 
 	case NumberPickerStep:
-		if step := GetNumberPickerStep(view); step > 0 {
+		if step := GetNumberPickerStep(picker); step > 0 {
-			view.Session().updateProperty(view.htmlID(), "step", strconv.FormatFloat(step, 'f', -1, 32))
+			picker.Session().updateProperty(picker.htmlID(), "step", fmt.Sprintf(picker.numberFormat(), step))
 		} else {
-			view.Session().updateProperty(view.htmlID(), "step", "any")
+			picker.Session().updateProperty(picker.htmlID(), "step", "any")
 		}
 
-	case TimePickerValue:
+	case NumberPickerValue:
-		value := GetNumberPickerValue(view)
+		value := GetNumberPickerValue(picker)
-		view.Session().callFunc("setInputValue", view.htmlID(), value)
+		format := picker.numberFormat()
+		picker.Session().callFunc("setInputValue", picker.htmlID(), fmt.Sprintf(format, value))
 
-		if listeners := GetNumberChangedListeners(view); len(listeners) > 0 {
+		if listeners := GetNumberChangedListeners(picker); len(listeners) > 0 {
 			old := 0.0
-			if val := view.getRaw("old-number"); val != nil {
+			if val := picker.getRaw("old-number"); val != nil {
 				if n, ok := val.(float64); ok {
 					old = n
 				}
 			}
+			if old != value {
 				for _, listener := range listeners {
-				listener(view, value, old)
+					listener(picker, value, old)
+				}
 			}
 		}
 
 	default:
-		viewPropertyChanged(view, tag)
+		picker.viewData.propertyChanged(tag)
 	}
 }
 
@@ -217,30 +238,31 @@ func (picker *numberPickerData) htmlProperties(self View, buffer *strings.Builde
 		buffer.WriteString(` type="number"`)
 	}
 
+	format := picker.numberFormat()
 	min, max := GetNumberPickerMinMax(picker)
 	if min != math.Inf(-1) {
 		buffer.WriteString(` min="`)
-		buffer.WriteString(strconv.FormatFloat(min, 'f', -1, 64))
+		buffer.WriteString(fmt.Sprintf(format, min))
 		buffer.WriteByte('"')
 	}
 
 	if max != math.Inf(1) {
 		buffer.WriteString(` max="`)
-		buffer.WriteString(strconv.FormatFloat(max, 'f', -1, 64))
+		buffer.WriteString(fmt.Sprintf(format, max))
 		buffer.WriteByte('"')
 	}
 
 	step := GetNumberPickerStep(picker)
 	if step != 0 {
 		buffer.WriteString(` step="`)
-		buffer.WriteString(strconv.FormatFloat(step, 'f', -1, 64))
+		buffer.WriteString(fmt.Sprintf(format, step))
 		buffer.WriteByte('"')
 	} else {
 		buffer.WriteString(` step="any"`)
 	}
 
 	buffer.WriteString(` value="`)
-	buffer.WriteString(strconv.FormatFloat(GetNumberPickerValue(picker), 'f', -1, 64))
+	buffer.WriteString(fmt.Sprintf(format, GetNumberPickerValue(picker)))
 	buffer.WriteByte('"')
 
 	buffer.WriteString(` oninput="editViewInputEvent(this)"`)
@@ -342,5 +364,11 @@ func GetNumberPickerValue(view View, subviewID ...string) float64 {
 // If there are no listeners then the empty list is returned
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetNumberChangedListeners(view View, subviewID ...string) []func(NumberPicker, float64, float64) {
-	return getEventWithOldListeners[NumberPicker, float64](view, subviewID, NumberChangedEvent)
+	return getTwoArgEventListeners[NumberPicker, float64](view, subviewID, NumberChangedEvent)
+}
+
+// GetNumberPickerPrecision returns the precision of displaying fractional part in editor of NumberPicker subview.
+// If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
+func GetNumberPickerPrecision(view View, subviewID ...string) int {
+	return intStyledProperty(view, subviewID, NumberPickerPrecision, 0)
 }

pointerEvents.go

@@ -156,7 +156,7 @@ type PointerEvent struct {
 
 /*
 func setPointerListener(properties Properties, tag PropertyName, value any) bool {
-	if listeners, ok := valueToEventListeners[View, PointerEvent](value); ok {
+	if listeners, ok := valueToOneArgEventListeners[View, PointerEvent](value); ok {
 		if len(listeners) == 0 {
 			properties.setRaw(tag, nil)
 		} else {
@@ -210,7 +210,7 @@ func (event *PointerEvent) init(data DataObject) {
 }
 
 func handlePointerEvents(view View, tag PropertyName, data DataObject) {
-	listeners := getEventListeners[View, PointerEvent](view, nil, tag)
+	listeners := getOneArgEventListeners[View, PointerEvent](view, nil, tag)
 	if len(listeners) == 0 {
 		return
 	}
@@ -226,35 +226,35 @@ func handlePointerEvents(view View, tag PropertyName, data DataObject) {
 // GetPointerDownListeners returns the "pointer-down" listener list. If there are no listeners then the empty list is returned.
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetPointerDownListeners(view View, subviewID ...string) []func(View, PointerEvent) {
-	return getEventListeners[View, PointerEvent](view, subviewID, PointerDown)
+	return getOneArgEventListeners[View, PointerEvent](view, subviewID, PointerDown)
 }
 
 // GetPointerUpListeners returns the "pointer-up" listener list. If there are no listeners then the empty list is returned.
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetPointerUpListeners(view View, subviewID ...string) []func(View, PointerEvent) {
-	return getEventListeners[View, PointerEvent](view, subviewID, PointerUp)
+	return getOneArgEventListeners[View, PointerEvent](view, subviewID, PointerUp)
 }
 
 // GetPointerMoveListeners returns the "pointer-move" listener list. If there are no listeners then the empty list is returned.
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetPointerMoveListeners(view View, subviewID ...string) []func(View, PointerEvent) {
-	return getEventListeners[View, PointerEvent](view, subviewID, PointerMove)
+	return getOneArgEventListeners[View, PointerEvent](view, subviewID, PointerMove)
 }
 
 // GetPointerCancelListeners returns the "pointer-cancel" listener list. If there are no listeners then the empty list is returned.
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetPointerCancelListeners(view View, subviewID ...string) []func(View, PointerEvent) {
-	return getEventListeners[View, PointerEvent](view, subviewID, PointerCancel)
+	return getOneArgEventListeners[View, PointerEvent](view, subviewID, PointerCancel)
 }
 
 // GetPointerOverListeners returns the "pointer-over" listener list. If there are no listeners then the empty list is returned.
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetPointerOverListeners(view View, subviewID ...string) []func(View, PointerEvent) {
-	return getEventListeners[View, PointerEvent](view, subviewID, PointerOver)
+	return getOneArgEventListeners[View, PointerEvent](view, subviewID, PointerOver)
 }
 
 // GetPointerOutListeners returns the "pointer-out" listener list. If there are no listeners then the empty list is returned.
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetPointerOutListeners(view View, subviewID ...string) []func(View, PointerEvent) {
-	return getEventListeners[View, PointerEvent](view, subviewID, PointerOut)
+	return getOneArgEventListeners[View, PointerEvent](view, subviewID, PointerOut)
 }

popup.go

@@ -560,7 +560,7 @@ func (popup *popupData) init(view View, popupParams Params) {
 				}
 
 			case DismissEvent:
-				if listeners, ok := valueToNoParamListeners[Popup](value); ok {
+				if listeners, ok := valueToNoArgEventListeners[Popup](value); ok {
 					if listeners != nil {
 						popup.dismissListener = listeners
 					}

progressBar.go

@@ -53,7 +53,7 @@ func (progress *progressBarData) init(session Session) {
 	progress.viewData.init(session)
 	progress.tag = "ProgressBar"
 	progress.normalize = normalizeProgressBarTag
-	progress.changed = progressBarPropertyChanged
+	progress.changed = progress.propertyChanged
 }
 
 func normalizeProgressBarTag(tag PropertyName) PropertyName {
@@ -68,19 +68,19 @@ func normalizeProgressBarTag(tag PropertyName) PropertyName {
 	return tag
 }
 
-func progressBarPropertyChanged(view View, tag PropertyName) {
+func (progress *progressBarData) propertyChanged(tag PropertyName) {
 
 	switch tag {
 	case ProgressBarMax:
-		view.Session().updateProperty(view.htmlID(), "max",
+		progress.Session().updateProperty(progress.htmlID(), "max",
-			strconv.FormatFloat(GetProgressBarMax(view), 'f', -1, 32))
+			strconv.FormatFloat(GetProgressBarMax(progress), 'f', -1, 32))
 
 	case ProgressBarValue:
-		view.Session().updateProperty(view.htmlID(), "value",
+		progress.Session().updateProperty(progress.htmlID(), "value",
-			strconv.FormatFloat(GetProgressBarValue(view), 'f', -1, 32))
+			strconv.FormatFloat(GetProgressBarValue(progress), 'f', -1, 32))
 
 	default:
-		viewPropertyChanged(view, tag)
+		progress.viewData.propertyChanged(tag)
 	}
 }
 

propertySet.go

@@ -19,6 +19,7 @@ var colorProperties = []PropertyName{
 	OutlineColor,
 	TextLineColor,
 	ColorPickerValue,
+	AccentColor,
 }
 
 func isPropertyInList(tag PropertyName, list []PropertyName) bool {
@@ -74,6 +75,7 @@ var intProperties = []PropertyName{
 	Order,
 	TabIndex,
 	MaxLength,
+	NumberPickerPrecision,
 }
 
 var floatProperties = map[PropertyName]struct{ min, max float64 }{
@@ -136,9 +138,9 @@ var sizeProperties = map[PropertyName]string{
 	Perspective:        string(Perspective),
 	PerspectiveOriginX: string(PerspectiveOriginX),
 	PerspectiveOriginY: string(PerspectiveOriginY),
-	OriginX:            string(OriginX),
+	TransformOriginX:   string(TransformOriginX),
-	OriginY:            string(OriginY),
+	TransformOriginY:   string(TransformOriginY),
-	OriginZ:            string(OriginZ),
+	TransformOriginZ:   string(TransformOriginZ),
 	Radius:             string(Radius),
 	RadiusX:            string(RadiusX),
 	RadiusY:            string(RadiusY),

resizable.go

@@ -80,8 +80,8 @@ func (resizable *resizableData) init(session Session) {
 	resizable.viewData.init(session)
 	resizable.tag = "Resizable"
 	resizable.systemClass = "ruiGridLayout"
-	resizable.set = resizableSet
+	resizable.set = resizable.setFunc
-	resizable.changed = resizablePropertyChanged
+	resizable.changed = resizable.propertyChanged
 }
 
 func (resizable *resizableData) Views() []View {
@@ -100,25 +100,25 @@ func (resizable *resizableData) content() View {
 	return nil
 }
 
-func resizableSet(view View, tag PropertyName, value any) []PropertyName {
+func (resizable *resizableData) setFunc(tag PropertyName, value any) []PropertyName {
 	switch tag {
 	case Side:
-		return resizableSetSide(view, value)
+		return resizableSetSide(resizable, value)
 
 	case ResizeBorderWidth:
-		return setSizeProperty(view, tag, value)
+		return setSizeProperty(resizable, tag, value)
 
 	case Content:
 		var newContent View = nil
 		switch value := value.(type) {
 		case string:
-			newContent = NewTextView(view.Session(), Params{Text: value})
+			newContent = NewTextView(resizable.Session(), Params{Text: value})
 
 		case View:
 			newContent = value
 
 		case DataObject:
-			if newContent = CreateViewFromObject(view.Session(), value); newContent == nil {
+			if newContent = CreateViewFromObject(resizable.Session(), value); newContent == nil {
 				return nil
 			}
 
@@ -127,7 +127,7 @@ func resizableSet(view View, tag PropertyName, value any) []PropertyName {
 			return nil
 		}
 
-		view.setRaw(Content, newContent)
+		resizable.setRaw(Content, newContent)
 		return []PropertyName{}
 
 	case CellWidth, CellHeight, GridRowGap, GridColumnGap, CellVerticalAlign, CellHorizontalAlign:
@@ -135,28 +135,28 @@ func resizableSet(view View, tag PropertyName, value any) []PropertyName {
 		return nil
 	}
 
-	return viewSet(view, tag, value)
+	return resizable.viewData.setFunc(tag, value)
 }
 
-func resizablePropertyChanged(view View, tag PropertyName) {
+func (resizable *resizableData) propertyChanged(tag PropertyName) {
 	switch tag {
 	case Side:
-		updateInnerHTML(view.htmlID(), view.Session())
+		updateInnerHTML(resizable.htmlID(), resizable.Session())
 		fallthrough
 
 	case ResizeBorderWidth:
-		htmlID := view.htmlID()
+		htmlID := resizable.htmlID()
-		session := view.Session()
+		session := resizable.Session()
-		column, row := resizableCellSizeCSS(view)
+		column, row := resizableCellSizeCSS(resizable)
 
 		session.updateCSSProperty(htmlID, "grid-template-columns", column)
 		session.updateCSSProperty(htmlID, "grid-template-rows", row)
 
 	case Content:
-		updateInnerHTML(view.htmlID(), view.Session())
+		updateInnerHTML(resizable.htmlID(), resizable.Session())
 
 	default:
-		viewPropertyChanged(view, tag)
+		resizable.viewData.propertyChanged(tag)
 	}
 
 }

resizeEvent.go

@@ -33,7 +33,7 @@ func (view *viewData) onItemResize(self View, index string, x, y, width, height
 
 /*
 func setFrameListener(properties Properties, tag PropertyName, value any) bool {
-	if listeners, ok := valueToEventListeners[View, Frame](value); ok {
+	if listeners, ok := valueToOneArgEventListeners[View, Frame](value); ok {
 		if len(listeners) == 0 {
 			properties.setRaw(tag, nil)
 		} else {
@@ -85,5 +85,5 @@ func GetViewFrame(view View, subviewID ...string) Frame {
 // GetResizeListeners returns the list of "resize-event" listeners. If there are no listeners then the empty list is returned
 // If the second argument (subviewID) is not specified or it is "" then the listeners list of the first argument (view) is returned
 func GetResizeListeners(view View, subviewID ...string) []func(View, Frame) {
-	return getEventListeners[View, Frame](view, subviewID, ResizeEvent)
+	return getOneArgEventListeners[View, Frame](view, subviewID, ResizeEvent)
 }

scrollEvent.go

@@ -54,7 +54,7 @@ func GetViewScroll(view View, subviewID ...string) Frame {
 // GetScrollListeners returns the list of "scroll-event" listeners. If there are no listeners then the empty list is returned
 // If the second argument (subviewID) is not specified or it is "" then the listeners list of the first argument (view) is returned
 func GetScrollListeners(view View, subviewID ...string) []func(View, Frame) {
-	return getEventListeners[View, Frame](view, subviewID, ResizeEvent)
+	return getOneArgEventListeners[View, Frame](view, subviewID, ResizeEvent)
 }
 
 // ScrollTo scrolls the view's content to the given position.

stackLayout.go

@@ -81,9 +81,10 @@ func (layout *stackLayoutData) init(session Session) {
 	layout.tag = "StackLayout"
 	layout.systemClass = "ruiStackLayout"
 	layout.properties[TransitionEndEvent] = []func(View, string){layout.pushFinished, layout.popFinished}
-	layout.getFunc = layout.get
+	layout.get = layout.getFunc
 	layout.set = layout.setFunc
 	layout.remove = layout.removeFunc
+	layout.changed = layout.propertyChanged
 }
 
 func (layout *stackLayoutData) pushFinished(view View, tag string) {
@@ -121,14 +122,14 @@ func (layout *stackLayoutData) popFinished(view View, tag string) {
 	}
 }
 
-func (layout *stackLayoutData) setFunc(view View, tag PropertyName, value any) []PropertyName {
+func (layout *stackLayoutData) setFunc(tag PropertyName, value any) []PropertyName {
 	switch tag {
 	case TransitionEndEvent:
-		listeners, ok := valueToEventListeners[View, string](value)
+		listeners, ok := valueToOneArgEventListeners[View, string](value)
 		if ok && listeners != nil {
 			listeners = append(listeners, layout.pushFinished)
 			listeners = append(listeners, layout.popFinished)
-			view.setRaw(TransitionEndEvent, listeners)
+			layout.setRaw(TransitionEndEvent, listeners)
 			return []PropertyName{tag}
 		}
 		return nil
@@ -170,42 +171,42 @@ func (layout *stackLayoutData) setFunc(view View, tag PropertyName, value any) [
 		layout.peek = newCurrent
 		return []PropertyName{tag}
 	}
-	return layout.viewsContainerData.setFunc(view, tag, value)
+	return layout.viewsContainerData.setFunc(tag, value)
 }
 
-func (layout *stackLayoutData) propertyChanged(view View, tag PropertyName) {
+func (layout *stackLayoutData) propertyChanged(tag PropertyName) {
 	switch tag {
 	case Current:
 		if layout.prevPeek != layout.peek {
 			if layout.prevPeek < len(layout.views) {
 				layout.Session().updateCSSProperty(layout.htmlID()+"page"+strconv.Itoa(layout.prevPeek), "visibility", "hidden")
 			}
-			layout.Session().updateCSSProperty(layout.htmlID()+"page"+strconv.Itoa(layout.prevPeek), "visibility", "visible")
+			layout.Session().updateCSSProperty(layout.htmlID()+"page"+strconv.Itoa(layout.peek), "visibility", "visible")
 			layout.prevPeek = layout.peek
 		}
 	default:
-		viewsContainerPropertyChanged(view, tag)
+		layout.viewsContainerData.propertyChanged(tag)
 	}
 }
 
-func (layout *stackLayoutData) removeFunc(view View, tag PropertyName) []PropertyName {
+func (layout *stackLayoutData) removeFunc(tag PropertyName) []PropertyName {
 	switch tag {
 	case TransitionEndEvent:
-		view.setRaw(TransitionEndEvent, []func(View, string){layout.pushFinished, layout.popFinished})
+		layout.setRaw(TransitionEndEvent, []func(View, string){layout.pushFinished, layout.popFinished})
 		return []PropertyName{tag}
 
 	case Current:
-		view.setRaw(Current, 0)
+		layout.setRaw(Current, 0)
 		return []PropertyName{tag}
 	}
-	return layout.viewsContainerData.removeFunc(view, tag)
+	return layout.viewsContainerData.removeFunc(tag)
 }
 
-func (layout *stackLayoutData) get(view View, tag PropertyName) any {
+func (layout *stackLayoutData) getFunc(tag PropertyName) any {
 	if tag == Current {
 		return layout.peek
 	}
-	return layout.viewsContainerData.get(view, tag)
+	return layout.viewsContainerData.getFunc(tag)
 }
 
 func (layout *stackLayoutData) Peek() View {

svgImageView.go

@@ -34,8 +34,8 @@ func (imageView *svgImageViewData) init(session Session) {
 	imageView.tag = "SvgImageView"
 	imageView.systemClass = "ruiSvgImageView"
 	imageView.normalize = normalizeSvgImageViewTag
-	imageView.set = svgImageViewSet
+	imageView.set = imageView.setFunc
-	imageView.changed = svgImageViewPropertyChanged
+	imageView.changed = imageView.propertyChanged
 
 }
 
@@ -54,28 +54,28 @@ func normalizeSvgImageViewTag(tag PropertyName) PropertyName {
 	return tag
 }
 
-func svgImageViewSet(view View, tag PropertyName, value any) []PropertyName {
+func (imageView *svgImageViewData) setFunc(tag PropertyName, value any) []PropertyName {
 	switch tag {
 	case Content:
 		if text, ok := value.(string); ok {
-			view.setRaw(Content, text)
+			imageView.setRaw(Content, text)
 			return []PropertyName{tag}
 		}
 		notCompatibleType(Source, value)
 		return nil
 
 	default:
-		return viewSet(view, tag, value)
+		return imageView.viewData.setFunc(tag, value)
 	}
 }
 
-func svgImageViewPropertyChanged(view View, tag PropertyName) {
+func (imageView *svgImageViewData) propertyChanged(tag PropertyName) {
 	switch tag {
 	case Content:
-		updateInnerHTML(view.htmlID(), view.Session())
+		updateInnerHTML(imageView.htmlID(), imageView.Session())
 
 	default:
-		viewPropertyChanged(view, tag)
+		imageView.viewData.propertyChanged(tag)
 	}
 }
 

tableView.go

@@ -593,8 +593,8 @@ func (table *tableViewData) init(session Session) {
 		table.current.Column = -1
 	*/
 	table.normalize = normalizeTableViewTag
-	table.set = tableViewSet
+	table.set = table.setFunc
-	table.changed = tableViewPropertyChanged
+	table.changed = table.propertyChanged
 }
 
 func normalizeTableViewTag(tag PropertyName) PropertyName {
@@ -618,7 +618,7 @@ func (table *tableViewData) Focusable() bool {
 	return GetTableSelectionMode(table) != NoneSelection
 }
 
-func tableViewSet(view View, tag PropertyName, value any) []PropertyName {
+func (table *tableViewData) setFunc(tag PropertyName, value any) []PropertyName {
 
 	setLineStyle := func() []PropertyName {
 		params := []Params{}
@@ -637,9 +637,9 @@ func tableViewSet(view View, tag PropertyName, value any) []PropertyName {
 		if len(params) > 0 {
 			style := new(simpleTableLineStyle)
 			style.params = params
-			view.setRaw(tag, style)
+			table.setRaw(tag, style)
-		} else if view.getRaw(tag) != nil {
+		} else if table.getRaw(tag) != nil {
-			view.setRaw(tag, nil)
+			table.setRaw(tag, nil)
 		} else {
 			return []PropertyName{}
 		}
@@ -650,13 +650,13 @@ func tableViewSet(view View, tag PropertyName, value any) []PropertyName {
 	case Content:
 		switch val := value.(type) {
 		case TableAdapter:
-			view.setRaw(Content, value)
+			table.setRaw(Content, value)
 
 		case [][]any:
-			view.setRaw(Content, NewSimpleTableAdapter(val))
+			table.setRaw(Content, NewSimpleTableAdapter(val))
 
 		case [][]string:
-			view.setRaw(Content, NewTextTableAdapter(val))
+			table.setRaw(Content, NewTextTableAdapter(val))
 
 		default:
 			notCompatibleType(tag, value)
@@ -665,14 +665,14 @@ func tableViewSet(view View, tag PropertyName, value any) []PropertyName {
 		return []PropertyName{tag}
 
 	case TableCellClickedEvent, TableCellSelectedEvent:
-		return setEventWithOldListener[TableView, int](view, tag, value)
+		return setTwoArgEventListener[TableView, int](table, tag, value)
 
 	case TableRowClickedEvent, TableRowSelectedEvent:
-		return setViewEventListener[TableView, int](view, tag, value)
+		return setOneArgEventListener[TableView, int](table, tag, value)
 
 	case CellStyle:
 		if style, ok := value.(TableCellStyle); ok {
-			view.setRaw(tag, style)
+			table.setRaw(tag, style)
 			return []PropertyName{tag}
 		}
 		notCompatibleType(tag, value)
@@ -680,14 +680,14 @@ func tableViewSet(view View, tag PropertyName, value any) []PropertyName {
 
 	case RowStyle:
 		if style, ok := value.(TableRowStyle); ok {
-			view.setRaw(tag, style)
+			table.setRaw(tag, style)
 			return []PropertyName{tag}
 		}
 		return setLineStyle()
 
 	case ColumnStyle:
 		if style, ok := value.(TableColumnStyle); ok {
-			view.setRaw(tag, style)
+			table.setRaw(tag, style)
 			return []PropertyName{tag}
 		}
 		return setLineStyle()
@@ -696,9 +696,9 @@ func tableViewSet(view View, tag PropertyName, value any) []PropertyName {
 		switch value := value.(type) {
 		case string:
 			if isConstantName(value) {
-				view.setRaw(tag, value)
+				table.setRaw(tag, value)
 			} else if n, err := strconv.Atoi(value); err == nil {
-				view.setRaw(tag, n)
+				table.setRaw(tag, n)
 			} else {
 				ErrorLog(err.Error())
 				notCompatibleType(tag, value)
@@ -707,7 +707,7 @@ func tableViewSet(view View, tag PropertyName, value any) []PropertyName {
 
 		default:
 			if n, ok := isInt(value); ok {
-				view.setRaw(tag, n)
+				table.setRaw(tag, n)
 			} else {
 				notCompatibleType(tag, value)
 				return nil
@@ -718,13 +718,13 @@ func tableViewSet(view View, tag PropertyName, value any) []PropertyName {
 	case HeadStyle, FootStyle:
 		switch value := value.(type) {
 		case string:
-			view.setRaw(tag, value)
+			table.setRaw(tag, value)
 
 		case Params:
 			if len(value) > 0 {
-				view.setRaw(tag, value)
+				table.setRaw(tag, value)
-			} else if view.getRaw(tag) != nil {
+			} else if table.getRaw(tag) != nil {
-				view.setRaw(tag, nil)
+				table.setRaw(tag, nil)
 			} else {
 				return []PropertyName{}
 			}
@@ -736,15 +736,15 @@ func tableViewSet(view View, tag PropertyName, value any) []PropertyName {
 					params[PropertyName(prop.Tag())] = prop.Text()
 				}
 			}
-			return tableViewSet(view, tag, params)
+			return table.setFunc(tag, params)
 
 		case DataNode:
 			switch value.Type() {
 			case ObjectNode:
-				return tableViewSet(view, tag, value.Object())
+				return table.setFunc(tag, value.Object())
 
 			case TextNode:
-				view.setRaw(tag, value.Text())
+				table.setRaw(tag, value.Text())
 
 			default:
 				notCompatibleType(tag, value)
@@ -760,10 +760,10 @@ func tableViewSet(view View, tag PropertyName, value any) []PropertyName {
 	case AllowSelection:
 		switch value.(type) {
 		case TableAllowCellSelection:
-			view.setRaw(tag, value)
+			table.setRaw(tag, value)
 
 		case TableAllowRowSelection:
-			view.setRaw(tag, value)
+			table.setRaw(tag, value)
 
 		default:
 			notCompatibleType(tag, value)
@@ -819,17 +819,17 @@ func tableViewSet(view View, tag PropertyName, value any) []PropertyName {
 				return nil
 			}
 		}
-		view.setRaw(Current, current)
+		table.setRaw(Current, current)
 		return []PropertyName{tag}
 	}
 
-	return viewSet(view, tag, value)
+	return table.viewData.setFunc(tag, value)
 }
 
-func tableViewPropertyChanged(view View, tag PropertyName) {
+func (table *tableViewData) propertyChanged(tag PropertyName) {
 
-	htmlID := view.htmlID()
+	htmlID := table.htmlID()
-	session := view.Session()
+	session := table.Session()
 
 	switch tag {
 	case Content, TableVerticalAlign, RowStyle, ColumnStyle, CellStyle, CellPadding,
@@ -837,20 +837,20 @@ func tableViewPropertyChanged(view View, tag PropertyName) {
 		CellPaddingTop, CellPaddingRight, CellPaddingBottom, CellPaddingLeft,
 		TableCellClickedEvent, TableCellSelectedEvent, TableRowClickedEvent,
 		TableRowSelectedEvent, AllowSelection, AccentColor:
-		ReloadTableViewData(view)
+		ReloadTableViewData(table)
 
 	case Current:
-		switch GetTableSelectionMode(view) {
+		switch GetTableSelectionMode(table) {
 		case CellSelection:
-			current := tableViewCurrent(view)
+			current := tableViewCurrent(table)
 			session.callFunc("setTableCellCursorByID", htmlID, current.Row, current.Column)
 
 		case RowSelection:
-			session.callFunc("setTableRowCursorByID", htmlID, tableViewCurrent(view).Row)
+			session.callFunc("setTableRowCursorByID", htmlID, tableViewCurrent(table).Row)
 		}
 
 	case Gap:
-		gap, ok := sizeProperty(view, Gap, session)
+		gap, ok := sizeProperty(table, Gap, session)
 		if !ok || gap.Type == Auto || gap.Value <= 0 {
 			session.updateCSSProperty(htmlID, "border-spacing", "0")
 			session.updateCSSProperty(htmlID, "border-collapse", "collapse")
@@ -860,43 +860,43 @@ func tableViewPropertyChanged(view View, tag PropertyName) {
 		}
 
 	case SelectionMode:
-		switch GetTableSelectionMode(view) {
+		switch GetTableSelectionMode(table) {
 		case CellSelection:
-			tabIndex, _ := intProperty(view, TabIndex, session, 0)
+			tabIndex, _ := intProperty(table, TabIndex, session, 0)
 			session.updateProperty(htmlID, "tabindex", tabIndex)
 			session.updateProperty(htmlID, "onfocus", "tableViewFocusEvent(this, event)")
 			session.updateProperty(htmlID, "onblur", "tableViewBlurEvent(this, event)")
 			session.updateProperty(htmlID, "data-selection", "cell")
-			session.updateProperty(htmlID, "data-focusitemstyle", tableViewCurrentStyle(view))
+			session.updateProperty(htmlID, "data-focusitemstyle", tableViewCurrentStyle(table))
-			session.updateProperty(htmlID, "data-bluritemstyle", tableViewCurrentInactiveStyle(view))
+			session.updateProperty(htmlID, "data-bluritemstyle", tableViewCurrentInactiveStyle(table))
 
-			current := tableViewCurrent(view)
+			current := tableViewCurrent(table)
 			if current.Row >= 0 && current.Column >= 0 {
-				session.updateProperty(htmlID, "data-current", tableViewCellID(view, current.Row, current.Column))
+				session.updateProperty(htmlID, "data-current", tableViewCellID(table, current.Row, current.Column))
 			} else {
 				session.removeProperty(htmlID, "data-current")
 			}
 			session.updateProperty(htmlID, "onkeydown", "tableViewCellKeyDownEvent(this, event)")
 
 		case RowSelection:
-			tabIndex, _ := intProperty(view, TabIndex, session, 0)
+			tabIndex, _ := intProperty(table, TabIndex, session, 0)
 			session.updateProperty(htmlID, "tabindex", tabIndex)
 			session.updateProperty(htmlID, "onfocus", "tableViewFocusEvent(this, event)")
 			session.updateProperty(htmlID, "onblur", "tableViewBlurEvent(this, event)")
 			session.updateProperty(htmlID, "data-selection", "row")
-			session.updateProperty(htmlID, "data-focusitemstyle", tableViewCurrentStyle(view))
+			session.updateProperty(htmlID, "data-focusitemstyle", tableViewCurrentStyle(table))
-			session.updateProperty(htmlID, "data-bluritemstyle", tableViewCurrentInactiveStyle(view))
+			session.updateProperty(htmlID, "data-bluritemstyle", tableViewCurrentInactiveStyle(table))
 
-			current := tableViewCurrent(view)
+			current := tableViewCurrent(table)
 			if current.Row >= 0 {
-				session.updateProperty(htmlID, "data-current", tableViewRowID(view, current.Row))
+				session.updateProperty(htmlID, "data-current", tableViewRowID(table, current.Row))
 			} else {
 				session.removeProperty(htmlID, "data-current")
 			}
 			session.updateProperty(htmlID, "onkeydown", "tableViewRowKeyDownEvent(this, event)")
 
 		default: // NoneSelection
-			if tabIndex, ok := intProperty(view, TabIndex, session, -1); !ok || tabIndex < 0 {
+			if tabIndex, ok := intProperty(table, TabIndex, session, -1); !ok || tabIndex < 0 {
 				session.removeProperty(htmlID, "tabindex")
 			}
 
@@ -907,7 +907,7 @@ func tableViewPropertyChanged(view View, tag PropertyName) {
 		updateInnerHTML(htmlID, session)
 
 	default:
-		viewPropertyChanged(view, tag)
+		table.viewData.propertyChanged(tag)
 	}
 }
 

tableViewUtils.go

@@ -152,28 +152,28 @@ func GetTableCurrent(view View, subviewID ...string) CellIndex {
 // If there are no listeners then the empty list is returned.
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetTableCellClickedListeners(view View, subviewID ...string) []func(TableView, int, int) {
-	return getEventWithOldListeners[TableView, int](view, subviewID, TableCellClickedEvent)
+	return getTwoArgEventListeners[TableView, int](view, subviewID, TableCellClickedEvent)
 }
 
 // GetTableCellSelectedListeners returns listeners of event which occurs when a table cell becomes selected.
 // If there are no listeners then the empty list is returned.
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetTableCellSelectedListeners(view View, subviewID ...string) []func(TableView, int, int) {
-	return getEventWithOldListeners[TableView, int](view, subviewID, TableCellSelectedEvent)
+	return getTwoArgEventListeners[TableView, int](view, subviewID, TableCellSelectedEvent)
 }
 
 // GetTableRowClickedListeners returns listeners of event which occurs when the user clicks on a table row.
 // If there are no listeners then the empty list is returned.
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetTableRowClickedListeners(view View, subviewID ...string) []func(TableView, int) {
-	return getEventListeners[TableView, int](view, subviewID, TableRowClickedEvent)
+	return getOneArgEventListeners[TableView, int](view, subviewID, TableRowClickedEvent)
 }
 
 // GetTableRowSelectedListeners returns listeners of event which occurs when a table row becomes selected.
 // If there are no listeners then the empty list is returned.
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetTableRowSelectedListeners(view View, subviewID ...string) []func(TableView, int) {
-	return getEventListeners[TableView, int](view, subviewID, TableRowSelectedEvent)
+	return getOneArgEventListeners[TableView, int](view, subviewID, TableRowSelectedEvent)
 }
 
 // ReloadTableViewData updates TableView

tabsLayout.go

@@ -168,69 +168,69 @@ func tabsLayoutCurrent(view View, defaultValue int) int {
 	return result
 }
 
-func (tabsLayout *tabsLayoutData) setFunc(view View, tag PropertyName, value any) []PropertyName {
+func (tabsLayout *tabsLayoutData) setFunc(tag PropertyName, value any) []PropertyName {
 	switch tag {
 	case CurrentTabChangedEvent:
-		return setEventWithOldListener[TabsLayout, int](view, tag, value)
+		return setTwoArgEventListener[TabsLayout, int](tabsLayout, tag, value)
 
 	case TabCloseEvent:
-		return setViewEventListener[TabsLayout, int](view, tag, value)
+		return setOneArgEventListener[TabsLayout, int](tabsLayout, tag, value)
 
 	case Current:
-		view.setRaw("old-current", tabsLayoutCurrent(view, -1))
+		tabsLayout.setRaw("old-current", tabsLayoutCurrent(tabsLayout, -1))
 
 		if current, ok := value.(int); ok && current < 0 {
-			view.setRaw(Current, nil)
+			tabsLayout.setRaw(Current, nil)
 			return []PropertyName{tag}
 		}
 
-		return setIntProperty(view, Current, value)
+		return setIntProperty(tabsLayout, Current, value)
 
 	case TabStyle, CurrentTabStyle, TabBarStyle:
 		if text, ok := value.(string); ok {
-			return setStringPropertyValue(view, tag, text)
+			return setStringPropertyValue(tabsLayout, tag, text)
 		}
 		notCompatibleType(tag, value)
 		return nil
 	}
 
-	return tabsLayout.viewsContainerData.setFunc(tabsLayout, tag, value)
+	return tabsLayout.viewsContainerData.setFunc(tag, value)
 }
 
-func (tabsLayout *tabsLayoutData) propertyChanged(view View, tag PropertyName) {
+func (tabsLayout *tabsLayoutData) propertyChanged(tag PropertyName) {
 	switch tag {
 	case Current:
-		session := view.Session()
+		session := tabsLayout.Session()
-		current := GetCurrent(view)
+		current := GetCurrent(tabsLayout)
-		session.callFunc("activateTab", view.htmlID(), current)
+		session.callFunc("activateTab", tabsLayout.htmlID(), current)
 
-		if listeners := getEventWithOldListeners[TabsLayout, int](view, nil, CurrentTabChangedEvent); len(listeners) > 0 {
+		if listeners := getTwoArgEventListeners[TabsLayout, int](tabsLayout, nil, CurrentTabChangedEvent); len(listeners) > 0 {
-			oldCurrent, _ := intProperty(view, "old-current", session, -1)
+			oldCurrent, _ := intProperty(tabsLayout, "old-current", session, -1)
 			for _, listener := range listeners {
 				listener(tabsLayout, current, oldCurrent)
 			}
 		}
 
 	case Tabs:
-		htmlID := view.htmlID()
+		htmlID := tabsLayout.htmlID()
-		session := view.Session()
+		session := tabsLayout.Session()
-		session.updateProperty(htmlID, inactiveTabStyle, tabsLayoutInactiveTabStyle(view))
+		session.updateProperty(htmlID, inactiveTabStyle, tabsLayoutInactiveTabStyle(tabsLayout))
-		session.updateProperty(htmlID, activeTabStyle, tabsLayoutActiveTabStyle(view))
+		session.updateProperty(htmlID, activeTabStyle, tabsLayoutActiveTabStyle(tabsLayout))
 		updateCSSStyle(htmlID, session)
 		updateInnerHTML(htmlID, session)
 
 	case TabStyle, CurrentTabStyle, TabBarStyle:
-		htmlID := view.htmlID()
+		htmlID := tabsLayout.htmlID()
-		session := view.Session()
+		session := tabsLayout.Session()
-		session.updateProperty(htmlID, inactiveTabStyle, tabsLayoutInactiveTabStyle(view))
+		session.updateProperty(htmlID, inactiveTabStyle, tabsLayoutInactiveTabStyle(tabsLayout))
-		session.updateProperty(htmlID, activeTabStyle, tabsLayoutActiveTabStyle(view))
+		session.updateProperty(htmlID, activeTabStyle, tabsLayoutActiveTabStyle(tabsLayout))
 		updateInnerHTML(htmlID, session)
 
 	case TabCloseButton:
-		updateInnerHTML(view.htmlID(), view.Session())
+		updateInnerHTML(tabsLayout.htmlID(), tabsLayout.Session())
 
 	default:
-		viewsContainerPropertyChanged(view, tag)
+		tabsLayout.viewsContainerData.propertyChanged(tag)
 	}
 }
 
@@ -499,7 +499,7 @@ func (tabsLayout *tabsLayoutData) ListItem(index int, session Session) View {
 			Column:  2,
 			Content: "✕",
 			ClickEvent: func() {
-				for _, listener := range getEventListeners[TabsLayout, int](tabsLayout, nil, TabCloseEvent) {
+				for _, listener := range getOneArgEventListeners[TabsLayout, int](tabsLayout, nil, TabCloseEvent) {
 					listener(tabsLayout, index)
 				}
 			},
@@ -565,7 +565,7 @@ func (tabsLayout *tabsLayoutData) Insert(view View, index int) {
 	if view != nil {
 		if current := GetCurrent(tabsLayout); current >= index {
 			tabsLayout.setRaw(Current, current+1)
-			defer tabsLayout.currentChanged()
+			defer tabsLayout.currentChanged(current+1, current)
 		}
 		tabsLayout.viewsContainerData.Insert(view, index)
 		view.SetChangeListener(Title, tabsLayout.updateTitle)
@@ -574,7 +574,10 @@ func (tabsLayout *tabsLayoutData) Insert(view View, index int) {
 	}
 }
 
-func (tabsLayout *tabsLayoutData) currentChanged() {
+func (tabsLayout *tabsLayoutData) currentChanged(newCurrent, oldCurrent int) {
+	for _, listener := range getTwoArgEventListeners[TabsLayout, int](tabsLayout, nil, CurrentTabChangedEvent) {
+		listener(tabsLayout, newCurrent, oldCurrent)
+	}
 	if listener, ok := tabsLayout.changeListener[Current]; ok {
 		listener(tabsLayout, Current)
 	}
@@ -600,7 +603,7 @@ func (tabsLayout *tabsLayoutData) RemoveView(index int) View {
 
 		if newCurrent != oldCurrent {
 			tabsLayout.setRaw(Current, newCurrent)
-			tabsLayout.currentChanged()
+			tabsLayout.currentChanged(newCurrent, oldCurrent)
 		}
 	}
 	return nil
@@ -871,10 +874,8 @@ func (tabsLayout *tabsLayoutData) handleCommand(self View, command PropertyName,
 				current := GetCurrent(tabsLayout)
 				if current != number {
 					tabsLayout.setRaw(Current, number)
-					for _, listener := range getEventWithOldListeners[TabsLayout, int](tabsLayout, nil, CurrentTabChangedEvent) {
+
-						listener(tabsLayout, number, current)
+					tabsLayout.currentChanged(number, current)
-					}
-					tabsLayout.currentChanged()
 				}
 			}
 		}
@@ -883,7 +884,7 @@ func (tabsLayout *tabsLayoutData) handleCommand(self View, command PropertyName,
 	case "tabCloseClick":
 		if numberText, ok := data.PropertyValue("number"); ok {
 			if number, err := strconv.Atoi(numberText); err == nil {
-				for _, listener := range getEventListeners[TabsLayout, int](tabsLayout, nil, TabCloseEvent) {
+				for _, listener := range getOneArgEventListeners[TabsLayout, int](tabsLayout, nil, TabCloseEvent) {
 					listener(tabsLayout, number)
 				}
 			}

textView.go

@@ -30,63 +30,63 @@ func newTextView(session Session) View {
 func (textView *textViewData) init(session Session) {
 	textView.viewData.init(session)
 	textView.tag = "TextView"
-	textView.set = textViewSet
+	textView.set = textView.setFunc
-	textView.changed = textViewPropertyChanged
+	textView.changed = textView.propertyChanged
 }
 
-func textViewPropertyChanged(view View, tag PropertyName) {
+func (textView *textViewData) propertyChanged(tag PropertyName) {
 	switch tag {
 	case Text:
-		updateInnerHTML(view.htmlID(), view.Session())
+		updateInnerHTML(textView.htmlID(), textView.Session())
 
 	case TextOverflow:
-		session := view.Session()
+		session := textView.Session()
-		if n, ok := enumProperty(view, TextOverflow, session, 0); ok {
+		if n, ok := enumProperty(textView, TextOverflow, session, 0); ok {
 			values := enumProperties[TextOverflow].cssValues
 			if n >= 0 && n < len(values) {
-				session.updateCSSProperty(view.htmlID(), string(TextOverflow), values[n])
+				session.updateCSSProperty(textView.htmlID(), string(TextOverflow), values[n])
 				return
 			}
 		}
-		session.updateCSSProperty(view.htmlID(), string(TextOverflow), "")
+		session.updateCSSProperty(textView.htmlID(), string(TextOverflow), "")
 
 	case NotTranslate:
-		updateInnerHTML(view.htmlID(), view.Session())
+		updateInnerHTML(textView.htmlID(), textView.Session())
 
 	default:
-		viewPropertyChanged(view, tag)
+		textView.viewData.propertyChanged(tag)
 	}
 }
 
-func textViewSet(view View, tag PropertyName, value any) []PropertyName {
+func (textView *textViewData) setFunc(tag PropertyName, value any) []PropertyName {
 	switch tag {
 	case Text:
 		switch value := value.(type) {
 		case string:
-			view.setRaw(Text, value)
+			textView.setRaw(Text, value)
 
 		case fmt.Stringer:
-			view.setRaw(Text, value.String())
+			textView.setRaw(Text, value.String())
 
 		case float32:
-			view.setRaw(Text, fmt.Sprintf("%g", float64(value)))
+			textView.setRaw(Text, fmt.Sprintf("%g", float64(value)))
 
 		case float64:
-			view.setRaw(Text, fmt.Sprintf("%g", value))
+			textView.setRaw(Text, fmt.Sprintf("%g", value))
 
 		case []rune:
-			view.setRaw(Text, string(value))
+			textView.setRaw(Text, string(value))
 
 		case bool:
 			if value {
-				view.setRaw(Text, "true")
+				textView.setRaw(Text, "true")
 			} else {
-				view.setRaw(Text, "false")
+				textView.setRaw(Text, "false")
 			}
 
 		default:
 			if n, ok := isInt(value); ok {
-				view.setRaw(Text, fmt.Sprintf("%d", n))
+				textView.setRaw(Text, fmt.Sprintf("%d", n))
 			} else {
 				notCompatibleType(tag, value)
 				return nil
@@ -95,7 +95,7 @@ func textViewSet(view View, tag PropertyName, value any) []PropertyName {
 		return []PropertyName{Text}
 	}
 
-	return viewSet(view, tag, value)
+	return textView.viewData.setFunc(tag, value)
 }
 
 func (textView *textViewData) htmlSubviews(self View, buffer *strings.Builder) {

timePicker.go

@@ -120,8 +120,8 @@ func (picker *timePickerData) init(session Session) {
 	picker.tag = "TimePicker"
 	picker.hasHtmlDisabled = true
 	picker.normalize = normalizeTimePickerTag
-	picker.set = timePickerSet
+	picker.set = picker.setFunc
-	picker.changed = timePickerPropertyChanged
+	picker.changed = picker.propertyChanged
 }
 
 func (picker *timePickerData) Focusable() bool {
@@ -167,22 +167,22 @@ func stringToTime(value string) (time.Time, bool) {
 	return result, true
 }
 
-func timePickerSet(view View, tag PropertyName, value any) []PropertyName {
+func (picker *timePickerData) setFunc(tag PropertyName, value any) []PropertyName {
 
 	setTimeValue := func(tag PropertyName) []PropertyName {
 		switch value := value.(type) {
 		case time.Time:
-			view.setRaw(tag, value)
+			picker.setRaw(tag, value)
 			return []PropertyName{tag}
 
 		case string:
 			if isConstantName(value) {
-				view.setRaw(tag, value)
+				picker.setRaw(tag, value)
 				return []PropertyName{tag}
 			}
 
 			if time, ok := stringToTime(value); ok {
-				view.setRaw(tag, time)
+				picker.setRaw(tag, time)
 				return []PropertyName{tag}
 			}
 		}
@@ -199,67 +199,67 @@ func timePickerSet(view View, tag PropertyName, value any) []PropertyName {
 		return setTimeValue(TimePickerMax)
 
 	case TimePickerStep:
-		return setIntProperty(view, TimePickerStep, value)
+		return setIntProperty(picker, TimePickerStep, value)
 
 	case TimePickerValue:
-		view.setRaw("old-time", GetTimePickerValue(view))
+		picker.setRaw("old-time", GetTimePickerValue(picker))
 		return setTimeValue(tag)
 
 	case TimeChangedEvent:
-		return setEventWithOldListener[TimePicker, time.Time](view, tag, value)
+		return setTwoArgEventListener[TimePicker, time.Time](picker, tag, value)
 
 	case DataList:
-		return setDataList(view, value, timeFormat)
+		return setDataList(picker, value, timeFormat)
 	}
 
-	return viewSet(view, tag, value)
+	return picker.viewData.setFunc(tag, value)
 }
 
-func timePickerPropertyChanged(view View, tag PropertyName) {
+func (picker *timePickerData) propertyChanged(tag PropertyName) {
 
-	session := view.Session()
+	session := picker.Session()
 
 	switch tag {
 
 	case TimePickerMin:
-		if time, ok := GetTimePickerMin(view); ok {
+		if time, ok := GetTimePickerMin(picker); ok {
-			session.updateProperty(view.htmlID(), "min", time.Format(timeFormat))
+			session.updateProperty(picker.htmlID(), "min", time.Format(timeFormat))
 		} else {
-			session.removeProperty(view.htmlID(), "min")
+			session.removeProperty(picker.htmlID(), "min")
 		}
 
 	case TimePickerMax:
-		if time, ok := GetTimePickerMax(view); ok {
+		if time, ok := GetTimePickerMax(picker); ok {
-			session.updateProperty(view.htmlID(), "max", time.Format(timeFormat))
+			session.updateProperty(picker.htmlID(), "max", time.Format(timeFormat))
 		} else {
-			session.removeProperty(view.htmlID(), "max")
+			session.removeProperty(picker.htmlID(), "max")
 		}
 
 	case TimePickerStep:
-		if step := GetTimePickerStep(view); step > 0 {
+		if step := GetTimePickerStep(picker); step > 0 {
-			session.updateProperty(view.htmlID(), "step", strconv.Itoa(step))
+			session.updateProperty(picker.htmlID(), "step", strconv.Itoa(step))
 		} else {
-			session.removeProperty(view.htmlID(), "step")
+			session.removeProperty(picker.htmlID(), "step")
 		}
 
 	case TimePickerValue:
-		value := GetTimePickerValue(view)
+		value := GetTimePickerValue(picker)
-		session.callFunc("setInputValue", view.htmlID(), value.Format(timeFormat))
+		session.callFunc("setInputValue", picker.htmlID(), value.Format(timeFormat))
 
-		if listeners := GetTimeChangedListeners(view); len(listeners) > 0 {
+		if listeners := GetTimeChangedListeners(picker); len(listeners) > 0 {
 			oldTime := time.Now()
-			if val := view.getRaw("old-time"); val != nil {
+			if val := picker.getRaw("old-time"); val != nil {
 				if time, ok := val.(time.Time); ok {
 					oldTime = time
 				}
 			}
 			for _, listener := range listeners {
-				listener(view, value, oldTime)
+				listener(picker, value, oldTime)
 			}
 		}
 
 	default:
-		viewPropertyChanged(view, tag)
+		picker.viewData.propertyChanged(tag)
 	}
 }
 
@@ -420,5 +420,5 @@ func GetTimePickerValue(view View, subviewID ...string) time.Time {
 // If there are no listeners then the empty list is returned
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetTimeChangedListeners(view View, subviewID ...string) []func(TimePicker, time.Time, time.Time) {
-	return getEventWithOldListeners[TimePicker, time.Time](view, subviewID, TimeChangedEvent)
+	return getTwoArgEventListeners[TimePicker, time.Time](view, subviewID, TimeChangedEvent)
 }

touchEvents.go

@@ -144,7 +144,7 @@ type TouchEvent struct {
 
 /*
 func setTouchListener(properties Properties, tag PropertyName, value any) bool {
-	if listeners, ok := valueToEventListeners[View, TouchEvent](value); ok {
+	if listeners, ok := valueToOneArgEventListeners[View, TouchEvent](value); ok {
 		if len(listeners) == 0 {
 			properties.setRaw(tag, nil)
 		} else {
@@ -215,7 +215,7 @@ func (event *TouchEvent) init(data DataObject) {
 }
 
 func handleTouchEvents(view View, tag PropertyName, data DataObject) {
-	listeners := getEventListeners[View, TouchEvent](view, nil, tag)
+	listeners := getOneArgEventListeners[View, TouchEvent](view, nil, tag)
 	if len(listeners) == 0 {
 		return
 	}
@@ -231,23 +231,23 @@ func handleTouchEvents(view View, tag PropertyName, data DataObject) {
 // GetTouchStartListeners returns the "touch-start" listener list. If there are no listeners then the empty list is returned.
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetTouchStartListeners(view View, subviewID ...string) []func(View, TouchEvent) {
-	return getEventListeners[View, TouchEvent](view, subviewID, TouchStart)
+	return getOneArgEventListeners[View, TouchEvent](view, subviewID, TouchStart)
 }
 
 // GetTouchEndListeners returns the "touch-end" listener list. If there are no listeners then the empty list is returned.
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetTouchEndListeners(view View, subviewID ...string) []func(View, TouchEvent) {
-	return getEventListeners[View, TouchEvent](view, subviewID, TouchEnd)
+	return getOneArgEventListeners[View, TouchEvent](view, subviewID, TouchEnd)
 }
 
 // GetTouchMoveListeners returns the "touch-move" listener list. If there are no listeners then the empty list is returned.
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetTouchMoveListeners(view View, subviewID ...string) []func(View, TouchEvent) {
-	return getEventListeners[View, TouchEvent](view, subviewID, TouchMove)
+	return getOneArgEventListeners[View, TouchEvent](view, subviewID, TouchMove)
 }
 
 // GetTouchCancelListeners returns the "touch-cancel" listener list. If there are no listeners then the empty list is returned.
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
 func GetTouchCancelListeners(view View, subviewID ...string) []func(View, TouchEvent) {
-	return getEventListeners[View, TouchEvent](view, subviewID, TouchCancel)
+	return getOneArgEventListeners[View, TouchEvent](view, subviewID, TouchCancel)
 }

videoPlayer.go

@@ -61,22 +61,22 @@ func newVideoPlayer(session Session) View {
 func (player *videoPlayerData) init(session Session) {
 	player.mediaPlayerData.init(session)
 	player.tag = "VideoPlayer"
-	player.changed = videoPlayerPropertyChanged
+	player.changed = player.propertyChanged
 }
 
 func (player *videoPlayerData) htmlTag() string {
 	return "video"
 }
 
-func videoPlayerPropertyChanged(view View, tag PropertyName) {
+func (player *videoPlayerData) propertyChanged(tag PropertyName) {
 
-	session := view.Session()
+	session := player.Session()
 	updateSize := func(cssTag string) {
-		if size, ok := floatTextProperty(view, tag, session, 0); ok {
+		if size, ok := floatTextProperty(player, tag, session, 0); ok {
 			if size != "0" {
-				session.updateProperty(view.htmlID(), cssTag, size)
+				session.updateProperty(player.htmlID(), cssTag, size)
 			} else {
-				session.removeProperty(view.htmlID(), cssTag)
+				session.removeProperty(player.htmlID(), cssTag)
 			}
 		}
 	}
@@ -89,14 +89,14 @@ func videoPlayerPropertyChanged(view View, tag PropertyName) {
 		updateSize("height")
 
 	case Poster:
-		if url, ok := stringProperty(view, Poster, session); ok {
+		if url, ok := stringProperty(player, Poster, session); ok {
-			session.updateProperty(view.htmlID(), string(Poster), url)
+			session.updateProperty(player.htmlID(), string(Poster), url)
 		} else {
-			session.removeProperty(view.htmlID(), string(Poster))
+			session.removeProperty(player.htmlID(), string(Poster))
 		}
 
 	default:
-		mediaPlayerPropertyChanged(view, tag)
+		player.mediaPlayerData.propertyChanged(tag)
 	}
 }
 

view.go

@@ -110,10 +110,10 @@ type viewData struct {
 	created          bool
 	hasFocus         bool
 	hasHtmlDisabled  bool
-	getFunc          func(view View, tag PropertyName) any
+	get              func(tag PropertyName) any
-	set              func(view View, tag PropertyName, value any) []PropertyName
+	set              func(tag PropertyName, value any) []PropertyName
-	remove           func(view View, tag PropertyName) []PropertyName
+	remove           func(tag PropertyName) []PropertyName
-	changed          func(view View, tag PropertyName)
+	changed          func(tag PropertyName)
 }
 
 func newView(session Session) View {
@@ -145,10 +145,11 @@ func setInitParams(view View, params Params) {
 
 func (view *viewData) init(session Session) {
 	view.viewStyle.init()
-	view.getFunc = viewGet
+	view.get = view.getFunc
-	view.set = viewSet
+	view.set = view.setFunc
+	view.remove = view.removeFunc
 	view.normalize = normalizeViewTag
-	view.changed = viewPropertyChanged
+	view.changed = view.propertyChanged
 	view.tag = "View"
 	view.session = session
 	view.changeListener = map[PropertyName]func(View, PropertyName){}
@@ -213,35 +214,11 @@ func (view *viewData) Focusable() bool {
 }
 
 func (view *viewData) Remove(tag PropertyName) {
-	tag = view.normalize(tag)
+	changedTags := view.removeFunc(view.normalize(tag))
-	var changedTags []PropertyName = nil
-
-	switch tag {
-	case ID:
-		if view.viewID != "" {
-			view.viewID = ""
-			changedTags = []PropertyName{ID}
-		}
-
-	case AnimationTag:
-		if val := view.getRaw(AnimationTag); val != nil {
-			if animations, ok := val.([]Animation); ok {
-				for _, animation := range animations {
-					animation.unused(view.session)
-				}
-			}
-
-			view.setRaw(AnimationTag, nil)
-			changedTags = []PropertyName{AnimationTag}
-		}
-
-	default:
-		changedTags = view.remove(view, tag)
-	}
 
 	if view.created && len(changedTags) > 0 {
 		for _, tag := range changedTags {
-			view.changed(view, tag)
+			view.changed(tag)
 		}
 
 		for _, tag := range changedTags {
@@ -252,6 +229,15 @@ func (view *viewData) Remove(tag PropertyName) {
 	}
 }
 
+func (view *viewData) Get(tag PropertyName) any {
+	switch tag {
+	case ID:
+		return view.ID()
+	}
+	return view.get(view.normalize(tag))
+
+}
+
 func (view *viewData) Set(tag PropertyName, value any) bool {
 	if value == nil {
 		view.Remove(tag)
@@ -259,42 +245,11 @@ func (view *viewData) Set(tag PropertyName, value any) bool {
 	}
 
 	tag = view.normalize(tag)
-	var changedTags []PropertyName = nil
+	changedTags := view.set(tag, value)
-
-	switch tag {
-	case ID:
-		text, ok := value.(string)
-		if !ok {
-			notCompatibleType(ID, value)
-			return false
-		}
-		view.viewID = text
-		changedTags = []PropertyName{ID}
-
-	case AnimationTag:
-		oldAnimations := []Animation{}
-		if val := view.getRaw(AnimationTag); val != nil {
-			if animation, ok := val.([]Animation); ok {
-				oldAnimations = animation
-			}
-		}
-
-		if !setAnimationProperty(view, tag, value) {
-			return false
-		}
-
-		for _, animation := range oldAnimations {
-			animation.unused(view.session)
-		}
-		changedTags = []PropertyName{AnimationTag}
-
-	default:
-		changedTags = viewSet(view, tag, value)
-	}
 
 	if view.created && len(changedTags) > 0 {
 		for _, tag := range changedTags {
-			view.changed(view, tag)
+			view.changed(tag)
 		}
 
 		for _, tag := range changedTags {
@@ -316,67 +271,78 @@ func normalizeViewTag(tag PropertyName) PropertyName {
 	return tag
 }
 
-/*
+func (view *viewData) getFunc(tag PropertyName) any {
-func (view *viewData) propertyChangedEvent(tag PropertyName) {
+	if tag == ID {
-	if listener, ok := view.changeListener[tag]; ok {
+		if id := view.ID(); id != "" {
-		listener(view, tag)
+			return id
+		} else {
+			return nil
+		}
+	}
+	return viewStyleGet(view, tag)
 }
 
+func (view *viewData) removeFunc(tag PropertyName) []PropertyName {
+	var changedTags []PropertyName = nil
+
 	switch tag {
-	case BorderLeft, BorderRight, BorderTop, BorderBottom,
+	case ID:
-		BorderStyle, BorderLeftStyle, BorderRightStyle, BorderTopStyle, BorderBottomStyle,
+		if view.viewID != "" {
-		BorderColor, BorderLeftColor, BorderRightColor, BorderTopColor, BorderBottomColor,
+			view.viewID = ""
-		BorderWidth, BorderLeftWidth, BorderRightWidth, BorderTopWidth, BorderBottomWidth:
+			changedTags = []PropertyName{ID}
-		tag = Border
+		} else {
+			changedTags = []PropertyName{}
+		}
 
-	case CellBorderStyle, CellBorderColor, CellBorderWidth,
+	case AnimationTag:
-		CellBorderLeft, CellBorderLeftStyle, CellBorderLeftColor, CellBorderLeftWidth,
+		if val := view.getRaw(AnimationTag); val != nil {
-		CellBorderRight, CellBorderRightStyle, CellBorderRightColor, CellBorderRightWidth,
+			if animations, ok := val.([]Animation); ok {
-		CellBorderTop, CellBorderTopStyle, CellBorderTopColor, CellBorderTopWidth,
+				for _, animation := range animations {
-		CellBorderBottom, CellBorderBottomStyle, CellBorderBottomColor, CellBorderBottomWidth:
+					animation.unused(view.session)
-		tag = CellBorder
+				}
+			}
 
-	case OutlineColor, OutlineStyle, OutlineWidth:
+			view.setRaw(AnimationTag, nil)
-		tag = Outline
+			changedTags = []PropertyName{AnimationTag}
-
+		}
-	case RadiusX, RadiusY, RadiusTopLeft, RadiusTopLeftX, RadiusTopLeftY,
-		RadiusTopRight, RadiusTopRightX, RadiusTopRightY,
-		RadiusBottomLeft, RadiusBottomLeftX, RadiusBottomLeftY,
-		RadiusBottomRight, RadiusBottomRightX, RadiusBottomRightY:
-		tag = Radius
-
-	case MarginTop, MarginRight, MarginBottom, MarginLeft,
-		"top-margin", "right-margin", "bottom-margin", "left-margin":
-		tag = Margin
-
-	case PaddingTop, PaddingRight, PaddingBottom, PaddingLeft,
-		"top-padding", "right-padding", "bottom-padding", "left-padding":
-		tag = Padding
-
-	case CellPaddingTop, CellPaddingRight, CellPaddingBottom, CellPaddingLeft:
-		tag = CellPadding
-
-	case ColumnSeparatorStyle, ColumnSeparatorWidth, ColumnSeparatorColor:
-		tag = ColumnSeparator
 
 	default:
-		return
+		changedTags = viewStyleRemove(view, tag)
 	}
 
-	if listener, ok := view.changeListener[tag]; ok {
+	return changedTags
-		listener(view, tag)
-	}
-}
-*/
-
-func viewRemove(properties Properties, tag PropertyName) []PropertyName {
-	return viewStyleRemove(properties, tag)
 }
 
-func viewSet(view View, tag PropertyName, value any) []PropertyName {
+func (view *viewData) setFunc(tag PropertyName, value any) []PropertyName {
 
 	switch tag {
 
+	case ID:
+		if text, ok := value.(string); ok {
+			view.viewID = text
+			view.setRaw(ID, text)
+			return []PropertyName{ID}
+		}
+		notCompatibleType(ID, value)
+		return nil
+
+	case AnimationTag:
+		oldAnimations := []Animation{}
+		if val := view.getRaw(AnimationTag); val != nil {
+			if animation, ok := val.([]Animation); ok {
+				oldAnimations = animation
+			}
+		}
+
+		if !setAnimationProperty(view, tag, value) {
+			return nil
+		}
+
+		for _, animation := range oldAnimations {
+			animation.unused(view.session)
+		}
+		return []PropertyName{AnimationTag}
+
 	case TabIndex, "tab-index":
 		return setIntProperty(view, TabIndex, value)
 
@@ -393,29 +359,46 @@ func viewSet(view View, tag PropertyName, value any) []PropertyName {
 		return nil
 
 	case FocusEvent, LostFocusEvent:
-		return setNoParamEventListener[View](view, tag, value)
+		return setNoArgEventListener[View](view, tag, value)
 
 	case KeyDownEvent, KeyUpEvent:
-		return setViewEventListener[View, KeyEvent](view, tag, value)
+		return setOneArgEventListener[View, KeyEvent](view, tag, value)
 
 	case ClickEvent, DoubleClickEvent, MouseDown, MouseUp, MouseMove, MouseOut, MouseOver, ContextMenuEvent:
-		return setViewEventListener[View, MouseEvent](view, tag, value)
+		return setOneArgEventListener[View, MouseEvent](view, tag, value)
 
 	case PointerDown, PointerUp, PointerMove, PointerOut, PointerOver, PointerCancel:
-		return setViewEventListener[View, PointerEvent](view, tag, value)
+		return setOneArgEventListener[View, PointerEvent](view, tag, value)
 
 	case TouchStart, TouchEnd, TouchMove, TouchCancel:
-		return setViewEventListener[View, TouchEvent](view, tag, value)
+		return setOneArgEventListener[View, TouchEvent](view, tag, value)
 
-	case TransitionRunEvent, TransitionStartEvent, TransitionEndEvent, TransitionCancelEvent,
+	case TransitionRunEvent, TransitionStartEvent, TransitionEndEvent, TransitionCancelEvent:
-		AnimationStartEvent, AnimationEndEvent, AnimationIterationEvent, AnimationCancelEvent:
+		result := setOneArgEventListener[View, PropertyName](view, tag, value)
-		return setViewEventListener[View, string](view, tag, value)
+		if result == nil {
-		//return setTransitionListener(view, tag, value), tag
+			result = setOneArgEventListener[View, string](view, tag, value)
-		//return setAnimationListener(view, tag, value), tag
+			if result != nil {
+				if listeners, ok := view.getRaw(tag).([]func(View, string)); ok {
+					newListeners := make([]func(View, PropertyName), len(listeners))
+					for i, listener := range listeners {
+						newListeners[i] = func(view View, name PropertyName) {
+							listener(view, string(name))
+						}
+					}
+					view.setRaw(tag, newListeners)
+					return result
+				}
+				view.setRaw(tag, nil)
+				return nil
+			}
+		}
+		return result
+
+	case AnimationStartEvent, AnimationEndEvent, AnimationIterationEvent, AnimationCancelEvent:
+		return setOneArgEventListener[View, string](view, tag, value)
 
 	case ResizeEvent, ScrollEvent:
-		return setViewEventListener[View, Frame](view, tag, value)
+		return setOneArgEventListener[View, Frame](view, tag, value)
-		//return setFrameListener(view, tag, value), tag
 	}
 
 	return viewStyleSet(view, tag, value)
@@ -439,12 +422,7 @@ func (view *viewData) SetParams(params Params) bool {
 	return result
 }
 
-func viewPropertyChanged(view View, tag PropertyName) {
+func (view *viewData) propertyChanged(tag PropertyName) {
-	/*
-		if view.updateTransformProperty(tag) {
-			return
-		}
-	*/
 
 	htmlID := view.htmlID()
 	session := view.Session()
@@ -645,9 +623,11 @@ func viewPropertyChanged(view View, tag PropertyName) {
 
 	case Strikethrough, Overline, Underline:
 		session.updateCSSProperty(htmlID, "text-decoration", textDecorationCSS(view, session))
+		/*
 			for _, tag2 := range []PropertyName{TextLineColor, TextLineStyle, TextLineThickness} {
-			viewPropertyChanged(view, tag2)
+				view.propertyChanged(tag2)
 			}
+		*/
 
 	case Transition:
 		session.updateCSSProperty(htmlID, "transition", transitionCSS(view, session))
@@ -711,34 +691,19 @@ func viewPropertyChanged(view View, tag PropertyName) {
 		}
 
 	case PerspectiveOriginX, PerspectiveOriginY:
-		if getTransform3D(view, session) {
 		x, y := GetPerspectiveOrigin(view)
-			value := ""
+		session.updateCSSProperty(htmlID, "perspective-origin", transformOriginCSS(x, y, AutoSize(), view.Session()))
-			if x.Type != Auto || y.Type != Auto {
-				value = x.cssString("50%", session) + " " + y.cssString("50%", session)
-			}
-			session.updateCSSProperty(htmlID, "perspective-origin", value)
-		}
 
 	case BackfaceVisible:
-		if getTransform3D(view, session) {
 		if GetBackfaceVisible(view) {
 			session.updateCSSProperty(htmlID, string(BackfaceVisible), "visible")
 		} else {
 			session.updateCSSProperty(htmlID, string(BackfaceVisible), "hidden")
 		}
-		}
 
-	case OriginX, OriginY, OriginZ:
+	case TransformOriginX, TransformOriginY, TransformOriginZ:
-		x, y, z := getOrigin(view, session)
+		x, y, z := getTransformOrigin(view, session)
-		value := ""
+		session.updateCSSProperty(htmlID, "transform-origin", transformOriginCSS(x, y, z, view.Session()))
-
-		if z.Type != Auto {
-			value = x.cssString("50%", session) + " " + y.cssString("50%", session) + " " + z.cssString("50%", session)
-		} else if x.Type != Auto || y.Type != Auto {
-			value = x.cssString("50%", session) + " " + y.cssString("50%", session)
-		}
-		session.updateCSSProperty(htmlID, "transform-origin", value)
 
 	case TransformTag, Perspective, SkewX, SkewY, TranslateX, TranslateY, TranslateZ,
 		ScaleX, ScaleY, ScaleZ, Rotate, RotateX, RotateY, RotateZ:
@@ -803,17 +768,6 @@ func viewPropertyChanged(view View, tag PropertyName) {
 	}
 }
 
-func viewGet(view View, tag PropertyName) any {
-	if tag == ID {
-		if id := view.ID(); id != "" {
-			return id
-		} else {
-			return nil
-		}
-	}
-	return viewStyleGet(view, tag)
-}
-
 func (view *viewData) htmlTag() string {
 	if semantics := GetSemantics(view); semantics > DefaultSemantics {
 		values := enumProperties[Semantics].cssValues
@@ -999,13 +953,13 @@ func (view *viewData) handleCommand(self View, command PropertyName, data DataOb
 
 	case FocusEvent:
 		view.hasFocus = true
-		for _, listener := range getNoParamEventListeners[View](view, nil, command) {
+		for _, listener := range getNoArgEventListeners[View](view, nil, command) {
 			listener(self)
 		}
 
 	case LostFocusEvent:
 		view.hasFocus = false
-		for _, listener := range getNoParamEventListeners[View](view, nil, command) {
+		for _, listener := range getNoArgEventListeners[View](view, nil, command) {
 			listener(self)
 		}
 

viewStyle.go

@@ -497,6 +497,16 @@ func normalizeViewStyleTag(tag PropertyName) PropertyName {
 
 	case "left-padding":
 		return PaddingLeft
+
+	case "origin-x":
+		return TransformOriginX
+
+	case "origin-y":
+		return TransformOriginY
+
+	case "origin-z":
+		return TransformOriginZ
+
 	}
 	return tag
 }
@@ -868,7 +878,8 @@ func writeViewStyle(name string, view Properties, buffer *strings.Builder, inden
 	}
 
 	finalTags := []PropertyName{
-		Perspective, PerspectiveOriginX, PerspectiveOriginY, BackfaceVisible, OriginX, OriginY, OriginZ,
+		PerspectiveOriginX, PerspectiveOriginY, BackfaceVisible,
+		TransformOriginX, TransformOriginY, TransformOriginZ,
 		TransformTag, Clip, Filter, BackdropFilter, Summary, Content, Transition}
 	for _, tag := range finalTags {
 		removeTag(tag)

viewTransform.go

@@ -79,7 +79,7 @@ const (
 	//
 	// Internal type is `SizeUnit`, other types converted to it during assignment.
 	// See `SizeUnit` description for more details.
-	OriginX PropertyName = "origin-x"
+	TransformOriginX PropertyName = "transform-origin-x"
 
 	// OriginY is the constant for "origin-y" property tag.
 	//
@@ -90,7 +90,7 @@ const (
 	//
 	// Internal type is `SizeUnit`, other types converted to it during assignment.
 	// See `SizeUnit` description for more details.
-	OriginY PropertyName = "origin-y"
+	TransformOriginY PropertyName = "transform-origin-y"
 
 	// OriginZ is the constant for "origin-z" property tag.
 	//
@@ -101,7 +101,7 @@ const (
 	//
 	// Internal type is `SizeUnit`, other types converted to it during assignment.
 	// See `SizeUnit` description for more details.
-	OriginZ PropertyName = "origin-z"
+	TransformOriginZ PropertyName = "transform-origin-z"
 
 	// TranslateX is the constant for "translate-x" property tag.
 	//
@@ -527,29 +527,31 @@ func getTransformProperty(properties Properties) Transform {
 func setTransformPropertyElement(properties Properties, tag PropertyName, value any) []PropertyName {
 	switch tag {
 	case Perspective, RotateX, RotateY, RotateZ, Rotate, SkewX, SkewY, ScaleX, ScaleY, ScaleZ, TranslateX, TranslateY, TranslateZ:
+		var result []PropertyName = nil
 		if transform := getTransformProperty(properties); transform != nil {
-			if result := transformSet(transform, tag, value); result != nil {
+			if result = transformSet(transform, tag, value); result != nil {
 				result = append(result, TransformTag)
 			}
 		} else {
 			transform := NewTransform(nil)
-			if result := transformSet(transform, tag, value); result != nil {
+			if result = transformSet(transform, tag, value); result != nil {
 				properties.setRaw(TransformTag, transform)
 				result = append(result, TransformTag)
 			}
 		}
-
+		return result
-	default:
-		ErrorLogF(`"Transform" interface does not support the "%s" property`, tag)
 	}
 
+	ErrorLogF(`"Transform" interface does not support the "%s" property`, tag)
 	return nil
 }
 
+/*
 func getTransform3D(style Properties, session Session) bool {
 	perspective, ok := sizeProperty(style, Perspective, session)
 	return ok && perspective.Type != Auto && perspective.Value != 0
 }
+*/
 
 func getPerspectiveOrigin(style Properties, session Session) (SizeUnit, SizeUnit) {
 	x, _ := sizeProperty(style, PerspectiveOriginX, session)
@@ -557,10 +559,10 @@ func getPerspectiveOrigin(style Properties, session Session) (SizeUnit, SizeUnit
 	return x, y
 }
 
-func getOrigin(style Properties, session Session) (SizeUnit, SizeUnit, SizeUnit) {
+func getTransformOrigin(style Properties, session Session) (SizeUnit, SizeUnit, SizeUnit) {
-	x, _ := sizeProperty(style, OriginX, session)
+	x, _ := sizeProperty(style, TransformOriginX, session)
-	y, _ := sizeProperty(style, OriginY, session)
+	y, _ := sizeProperty(style, TransformOriginY, session)
-	z, _ := sizeProperty(style, OriginZ, session)
+	z, _ := sizeProperty(style, TransformOriginZ, session)
 	return x, y, z
 }
 
@@ -674,8 +676,9 @@ func (transform *transformData) transformCSS(session Session) string {
 
 func (style *viewStyle) writeViewTransformCSS(builder cssBuilder, session Session) {
 	x, y := getPerspectiveOrigin(style, session)
-	if x.Type != Auto || y.Type != Auto {
+	z := AutoSize()
-		builder.addValues(`perspective-origin`, ` `, x.cssString("50%", session), y.cssString("50%", session))
+	if css := transformOriginCSS(x, y, z, session); css != "" {
+		builder.add(`perspective-origin`, css)
 	}
 
 	if backfaceVisible, ok := boolProperty(style, BackfaceVisible, session); ok {
@@ -686,11 +689,9 @@ func (style *viewStyle) writeViewTransformCSS(builder cssBuilder, session Sessio
 		}
 	}
 
-	x, y, z := getOrigin(style, session)
+	x, y, z = getTransformOrigin(style, session)
-	if z.Type != Auto && z.Value != 0 {
+	if css := transformOriginCSS(x, y, z, session); css != "" {
-		builder.addValues(`transform-origin`, ` `, x.cssString("50%", session), y.cssString("50%", session), z.cssString("0", session))
+		builder.add(`transform-origin`, css)
-	} else if x.Type != Auto || y.Type != Auto {
-		builder.addValues(`transform-origin`, ` `, x.cssString("50%", session), y.cssString("50%", session))
 	}
 
 	if transform := getTransformProperty(style); transform != nil {
@@ -698,6 +699,56 @@ func (style *viewStyle) writeViewTransformCSS(builder cssBuilder, session Sessio
 	}
 }
 
+func transformOriginCSS(x, y, z SizeUnit, session Session) string {
+	if z.Type == Auto && x.Type == Auto && y.Type == Auto {
+		return ""
+	}
+
+	buffer := allocStringBuilder()
+	defer freeStringBuilder(buffer)
+
+	if x.Type == SizeInPercent {
+		switch x.Value {
+		case 0:
+			buffer.WriteString("left")
+		case 50:
+			buffer.WriteString("center")
+		case 100:
+			buffer.WriteString("right")
+
+		default:
+			buffer.WriteString(x.cssString("center", session))
+		}
+	} else {
+		buffer.WriteString(x.cssString("center", session))
+	}
+
+	buffer.WriteRune(' ')
+
+	if y.Type == SizeInPercent {
+		switch y.Value {
+		case 0:
+			buffer.WriteString("top")
+		case 50:
+			buffer.WriteString("center")
+		case 100:
+			buffer.WriteString("bottom")
+
+		default:
+			buffer.WriteString(y.cssString("center", session))
+		}
+	} else {
+		buffer.WriteString(y.cssString("center", session))
+	}
+
+	if z.Type != Auto && z.Value != 0 {
+		buffer.WriteRune(' ')
+		buffer.WriteString(z.cssString("0", session))
+	}
+
+	return buffer.String()
+}
+
 /*
 func (view *viewData) updateTransformProperty(tag PropertyName) bool {
 	htmlID := view.htmlID()

viewUtils.go

@@ -613,17 +613,17 @@ func GetBackfaceVisible(view View, subviewID ...string) bool {
 	return boolStyledProperty(view, subviewID, BackfaceVisible, false)
 }
 
-// GetOrigin returns a x-, y-, and z-coordinate of the point around which a view transformation is applied.
+// GetTransformOrigin returns a x-, y-, and z-coordinate of the point around which a view transformation is applied.
 // The default value is (50%, 50%, 50%).
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
-func GetOrigin(view View, subviewID ...string) (SizeUnit, SizeUnit, SizeUnit) {
+func GetTransformOrigin(view View, subviewID ...string) (SizeUnit, SizeUnit, SizeUnit) {
 	if len(subviewID) > 0 && subviewID[0] != "" {
 		view = ViewByID(view, subviewID[0])
 	}
 	if view == nil {
 		return AutoSize(), AutoSize(), AutoSize()
 	}
-	return getOrigin(view, view.Session())
+	return getTransformOrigin(view, view.Session())
 }
 
 // GetTranslate returns a x-, y-, and z-axis translation value of a 2D/3D translation

viewsContainer.go

@@ -38,10 +38,10 @@ func (container *viewsContainerData) init(session Session) {
 	container.viewData.init(session)
 	container.tag = "ViewsContainer"
 	container.views = []View{}
-	container.getFunc = container.get
+	container.get = container.getFunc
 	container.set = container.setFunc
 	container.remove = container.removeFunc
-	container.changed = viewsContainerPropertyChanged
+	container.changed = container.propertyChanged
 }
 
 func (container *viewsContainerData) setParentID(parentID string) {
@@ -163,7 +163,7 @@ func viewFromTextValue(text string, session Session) View {
 	return NewTextView(session, Params{Text: text})
 }
 
-func (container *viewsContainerData) removeFunc(view View, tag PropertyName) []PropertyName {
+func (container *viewsContainerData) removeFunc(tag PropertyName) []PropertyName {
 	switch tag {
 	case Content:
 		if len(container.views) > 0 {
@@ -173,18 +173,18 @@ func (container *viewsContainerData) removeFunc(view View, tag PropertyName) []P
 		return []PropertyName{}
 
 	case Disabled:
-		if view.getRaw(Disabled) != nil {
+		if container.getRaw(Disabled) != nil {
-			view.setRaw(Disabled, nil)
+			container.setRaw(Disabled, nil)
 			for _, view := range container.views {
 				view.Remove(Disabled)
 			}
 			return []PropertyName{tag}
 		}
 	}
-	return viewRemove(view, tag)
+	return container.viewData.removeFunc(tag)
 }
 
-func (container *viewsContainerData) setFunc(self View, tag PropertyName, value any) []PropertyName {
+func (container *viewsContainerData) setFunc(tag PropertyName, value any) []PropertyName {
 	switch tag {
 	case Content:
 		if container.setContent(value) {
@@ -194,7 +194,7 @@ func (container *viewsContainerData) setFunc(self View, tag PropertyName, value
 
 	case Disabled:
 		oldDisabled := IsDisabled(container)
-		result := viewSet(self, Disabled, value)
+		result := container.viewData.setFunc(Disabled, value)
 		if result != nil {
 			disabled := IsDisabled(container)
 			if oldDisabled != disabled {
@@ -206,16 +206,16 @@ func (container *viewsContainerData) setFunc(self View, tag PropertyName, value
 		return result
 	}
 
-	return viewSet(self, tag, value)
+	return container.viewData.setFunc(tag, value)
 }
 
-func viewsContainerPropertyChanged(view View, tag PropertyName) {
+func (container *viewsContainerData) propertyChanged(tag PropertyName) {
 	switch tag {
 	case Content:
-		updateInnerHTML(view.htmlID(), view.Session())
+		updateInnerHTML(container.htmlID(), container.Session())
 
 	default:
-		viewPropertyChanged(view, tag)
+		container.viewData.propertyChanged(tag)
 	}
 }
 
@@ -292,13 +292,13 @@ func (container *viewsContainerData) setContent(value any) bool {
 	return true
 }
 
-func (container *viewsContainerData) get(view View, tag PropertyName) any {
+func (container *viewsContainerData) getFunc(tag PropertyName) any {
 	switch tag {
 	case Content:
 		return container.views
 
 	default:
-		return viewGet(view, tag)
+		return container.viewData.getFunc(tag)
 	}
 }