Added: "focusable" and "user-data" properties, ConstantTags and ColorTags function to Session, ReloadTableViewData function. Bug fixing

.vscode/launch.json

@@ -9,8 +9,8 @@
             "type": "go",
             "request": "launch",
             "mode": "auto",
-            "program": "${workspaceRoot}/demo",
+            //"program": "${workspaceRoot}/demo",
-            //"program": "${workspaceRoot}/editor",
+            "program": "${workspaceRoot}/ruiEditor",
             "env": {},
             "args": []
         }

CHANGELOG.md

@@ -1,3 +1,9 @@
+# v0.6.0
+
+* Added "user-data" property
+* Added "focusable" property
+* Added ReloadTableViewData function
+
 # v0.5.0
 
 * NewApplication function and  Start function of the Application interface were replaced by StartApp function

README-ru.md

@@ -1679,6 +1679,10 @@ radius необходимо передать nil
 
 	func GetSkew(view View, subviewID string) (AngleUnit, AngleUnit)
 
+### Пользовательские данные
+
+Вы можете сохранить любые ваши данные в виде свойства "user-data" (константа UserData)
+
 ### События клавиатуры
 
 Для View получившего фокус ввода могут генерироваться два вида событий клавиатуры
@@ -2682,16 +2686,16 @@ EditTextChangedEvent). Основной слушатель события име
 	func NewNumberPicker(session Session, params Params) NumberPicker
 
 NumberPicker может работать в двух режимах: редактор текста и слайдер.
-Режим устанавливает int свойство "date-picker-type" (константа NumberPickerType).
+Режим устанавливает int свойство "number-picker-type" (константа NumberPickerType).
-Свойство "date-picker-type" может принимать следующие значения:
+Свойство "number-picker-type" может принимать следующие значения:
 
 | Значение | Константа    | Имя      | Тип редактора                          |
 |:--------:|--------------|----------|----------------------------------------|
 | 0	       | NumberEditor | "editor" | Редактор текста. Значение по умолчанию |
 | 1	       | NumberSlider | "slider" | Слайдер                                |
 
-Установить/прочитать текущее значение можно с помощью свойства "date-picker-value"
+Установить/прочитать текущее значение можно с помощью свойства "number-picker-value"
-(константа NumberPickerValue). В качестве значения свойству "date-picker-value" могут быть переданы:
+(константа NumberPickerValue). В качестве значения свойству "number-picker-value" могут быть переданы:
 
 * float64
 * float32
@@ -2702,7 +2706,7 @@ NumberPicker может работать в двух режимах: редак
 * текстовое представление любых из выше перечисленых типов
 
 Все эти типы приводятся к float64. Соответственно функция Get всегда возвращает float64 значение.
-Прочитано значение свойства "date-picker-value" может быть также с помощью функции:
+Прочитано значение свойства "number-picker-value" может быть также с помощью функции:
 
 	func GetNumberPickerValue(view View, subviewID string) float64
 
@@ -2710,14 +2714,14 @@ NumberPicker может работать в двух режимах: редак
 
 | Свойство             | Константа        | Ограничение |
 |----------------------|------------------|------------------------|
-| "date-picker-min"  | NumberPickerMin  | Минимальное значение   |
+| "number-picker-min"  | NumberPickerMin  | Минимальное значение   |
-| "date-picker-max"  | NumberPickerMax  | Максимальное значение  |
+| "number-picker-max"  | NumberPickerMax  | Максимальное значение  |
-| "date-picker-step" | NumberPickerStep | Шаг изменения значения |
+| "number-picker-step" | NumberPickerStep | Шаг изменения значения |
 
-Присвоины данным свойствам могут те же типы значений, что и "date-picker-value".
+Присвоины данным свойствам могут те же типы значений, что и "number-picker-value".
 
-По умолчанию, в случае если "date-picker-type" равно NumberSlider, минимальное значение равно 0,
+По умолчанию, в случае если "number-picker-type" равно NumberSlider, минимальное значение равно 0,
-максимальное - 1. Если же "date-picker-type" равно NumberEditor то вводимые числа, по умолчанию,
+максимальное - 1. Если же "number-picker-type" равно NumberEditor то вводимые числа, по умолчанию,
 ограничены лишь диапазоном значений float64.
 
 Прочитать значения данных свойств можно с помощью функций:
@@ -2725,7 +2729,7 @@ NumberPicker может работать в двух режимах: редак
 	func GetNumberPickerMinMax(view View, subviewID string) (float64, float64)
 	func GetNumberPickerStep(view View, subviewID string) float64
 
-Для отслеживания изменения вводимого значения используется событие "date-changed" (константа
+Для отслеживания изменения вводимого значения используется событие "number-changed" (константа
 NumberChangedEvent).  Основной слушатель события имеет следующий формат:
 
 	func(picker NumberPicker, newValue float64)

README.md

@@ -1654,6 +1654,10 @@ You can get the value of these properties using the function
 
 	func GetSkew(view View, subviewID string) (AngleUnit, AngleUnit)
 
+### User data
+
+You can save any of your data as "user-data" property (UserData constant)
+
 ### Keyboard events
 
 Two kinds of keyboard events can be generated for a View that has received input focus.
@@ -2648,16 +2652,16 @@ To create a NumberPicker, the function is used:
 	func NewNumberPicker(session Session, params Params) NumberPicker
 
 NumberPicker can work in two modes: text editor and slider.
-The mode sets the int property "date-picker-type" (NumberPickerType constant).
+The mode sets the int property "number-picker-type" (NumberPickerType constant).
-The "date-picker-type" property can take the following values:
+The "number-picker-type" property can take the following values:
 
 | Value | Constant     | Name     | Editor type                |
 |:-----:|--------------|----------|----------------------------|
 | 0     | NumberEditor | "editor" | Text editor. Default value |
 | 1     | NumberSlider | "slider" | Slider                     |
 
-You can set/get the current value using the "date-picker-value" property (NumberPickerValue constant). 
+You can set/get the current value using the "number-picker-value" property (NumberPickerValue constant). 
-The following can be passed as a value to the "date-picker-value" property:
+The following can be passed as a value to the "number-picker-value" property:
 
 * float64
 * float32
@@ -2668,29 +2672,29 @@ The following can be passed as a value to the "date-picker-value" property:
 * textual representation of any of the above types
 
 All of these types are cast to float64. Accordingly, the Get function always returns a float64 value.
-The value of the "date-picker-value" property can also be read using the function:
+The value of the "number-picker-value" property can also be read using the function:
 
 	func GetNumberPickerValue(view View, subviewID string) float64
 
 The entered values may be subject to restrictions. For this, the following properties are used:
 
-| Property           | Constant         | Restriction       |
+| Property             | Constant         | Restriction       |
-|--------------------|------------------|-------------------|
+|----------------------|------------------|-------------------|
-| "date-picker-min"  | NumberPickerMin  | Minimum value     |
+| "number-picker-min"  | NumberPickerMin  | Minimum value     |
-| "date-picker-max"  | NumberPickerMax  | Maximum value     |
+| "number-picker-max"  | NumberPickerMax  | Maximum value     |
-| "date-picker-step" | NumberPickerStep | Value change step |
+| "number-picker-step" | NumberPickerStep | Value change step |
 
-Assignments to these properties can be the same value types as "date-picker-value".
+Assignments to these properties can be the same value types as "number-picker-value".
 
-By default, if "date-picker-type" is equal to NumberSlider, the minimum value is 0, maximum is 1. 
+By default, if "number-picker-type" is equal to NumberSlider, the minimum value is 0, maximum is 1. 
-If "date-picker-type" is equal to NumberEditor, then the entered numbers, by default, are limited only by the range of float64 values.
+If "number-picker-type" is equal to NumberEditor, then the entered numbers, by default, are limited only by the range of float64 values.
 
 You can read the values of these properties using the functions:
 
 	func GetNumberPickerMinMax(view View, subviewID string) (float64, float64)
 	func GetNumberPickerStep(view View, subviewID string) float64
 
-The "date-changed" event (NumberChangedEvent constant) is used to track the change in the entered value. 
+The "number-changed" event (NumberChangedEvent constant) is used to track the change in the entered value. 
 The main event listener has the following format:
 
 	func(picker NumberPicker, newValue float64)

app_scripts.js

@@ -1759,7 +1759,7 @@ function tableRowClickEvent(element, event) {
 	const table = document.getElementById(tableID);
 	if (table) {
 		const selection = table.getAttribute("data-selection");
-		if (selection == "cell") {
+		if (selection == "row") {
 			const currentID = table.getAttribute("data-current");
 			if (!currentID || currentID != element.ID) {
 				setTableRowCursor(table, row)

app_styles.css

@@ -21,13 +21,25 @@ div:focus {
 }
 
 input {
-  padding: 4px;
+  margin: 2px;
-  overflow: auto;
+  padding: 1px;
+  font-size: inherit;
+}
+
+select {
+  margin: 2px;
+  font-size: inherit;
+}
+
+button {
+  font-size: inherit;
 }
 
 textarea {
-  padding: 4px;
+  margin: 2px;
+  padding: 1px;
   overflow: auto;
+  font-size: inherit;
 }
 
 ul:focus {

defaultTheme.rui

@@ -65,7 +65,7 @@ theme {
 	styles = [
 		ruiApp {
 			font-name = "Arial, Helvetica, sans-serif",
-			text-size = 12pt,
+			text-size = 10pt,
 			text-color = @ruiTextColor,
 			background-color = @ruiBackgroundColor,
 		},

propertyNames.go

@@ -9,6 +9,9 @@ const (
 	StyleDisabled = "style-disabled"
 	// Disabled is the constant for the "disabled" property tag.
 	Disabled = "disabled"
+	// Focusable is the constant for the "disabled" property tag.
+	// The bool "focusable" determines whether the view will receive focus.
+	Focusable = "focusable"
 	// Semantics is the constant for the "semantics" property tag.
 	Semantics = "semantics"
 	// Visibility is the constant for the "visibility" property tag.
@@ -440,4 +443,7 @@ const (
 	// The "float" property places a View on the left or right side of its container,
 	// allowing text and inline Views to wrap around it.
 	Float = "float"
+	// UsetData is the constant for the "user-data" property tag.
+	// This property can contain any user data
+	UserData = "user-data"
 )

propertySet.go

@@ -37,6 +37,7 @@ var angleProperties = []string{
 
 var boolProperties = []string{
 	Disabled,
+	Focusable,
 	Inset,
 	BackfaceVisible,
 	ReadOnly,

session.go

@@ -29,8 +29,12 @@ type Session interface {
 	TextDirection() int
 	// Constant returns the constant with "tag" name or "" if it is not exists
 	Constant(tag string) (string, bool)
+	// ConstantTags returns the list of all available constants
+	ConstantTags() []string
 	// Color returns the color with "tag" name or 0 if it is not exists
 	Color(tag string) (Color, bool)
+	// ColorTags returns the list of all available color constants
+	ColorTags() []string
 	// SetCustomTheme set the custom theme
 	SetCustomTheme(name string) bool
 	// UserAgent returns the "user-agent" text of the client browser
@@ -106,6 +110,7 @@ type Session interface {
 
 type sessionData struct {
 	customTheme      *theme
+	currentTheme     *theme
 	darkTheme        bool
 	touchScreen      bool
 	textDirection    int
@@ -146,6 +151,7 @@ func newSession(app Application, id int, customTheme string, params DataObject)
 	if customTheme != "" {
 		if theme, ok := newTheme(customTheme); ok {
 			session.customTheme = theme
+			session.currentTheme = nil
 		}
 	}
 
@@ -206,18 +212,11 @@ func (session *sessionData) close() {
 }
 
 func (session *sessionData) styleProperty(styleTag, propertyTag string) (string, bool) {
-	var style DataObject
+	if style, ok := session.getCurrentTheme().styles[styleTag]; ok {
-	ok := false
+		if value, ok := style[propertyTag]; ok {
-	if session.customTheme != nil {
+			if text, ok := value.(string); ok {
-		style, ok = session.customTheme.styles[styleTag]
+				return session.resolveConstants(text)
-	}
+			}
-	if !ok {
-		style, ok = defaultTheme.styles[styleTag]
-	}
-
-	if ok {
-		if node := style.PropertyWithTag(propertyTag); node != nil && node.Type() == TextNode {
-			return session.resolveConstants(node.Text())
 		}
 	}
 
@@ -226,17 +225,12 @@ func (session *sessionData) styleProperty(styleTag, propertyTag string) (string,
 }
 
 func (session *sessionData) stylePropertyNode(styleTag, propertyTag string) DataNode {
-	var style DataObject
+	if style, ok := session.getCurrentTheme().styles[styleTag]; ok {
-	ok := false
+		if value, ok := style[propertyTag]; ok {
-	if session.customTheme != nil {
+			if node, ok := value.(DataNode); ok {
-		style, ok = session.customTheme.styles[styleTag]
+				return node
-	}
+			}
-	if !ok {
+		}
-		style, ok = defaultTheme.styles[styleTag]
-	}
-
-	if ok {
-		return style.PropertyWithTag(propertyTag)
 	}
 
 	return nil
@@ -280,17 +274,7 @@ func (session *sessionData) RootView() View {
 }
 
 func (session *sessionData) writeInitScript(writer *strings.Builder) {
-	var workTheme *theme
+	if css := session.getCurrentTheme().cssText(session); css != "" {
-	if session.customTheme == nil {
-		workTheme = defaultTheme
-	} else {
-		workTheme = new(theme)
-		workTheme.init()
-		workTheme.concat(defaultTheme)
-		workTheme.concat(session.customTheme)
-	}
-
-	if css := workTheme.cssText(session); css != "" {
 		writer.WriteString(`document.querySelector('style').textContent += "`)
 		writer.WriteString(css)
 		writer.WriteString("\";\n")

sessionTheme.go

@@ -2,24 +2,10 @@ package rui
 
 import (
 	"fmt"
+	"sort"
 	"strings"
 )
 
-/*
-type Session struct {
-	customTheme    *theme
-	darkTheme      bool
-	touchScreen    bool
-	textDirection  int
-	pixelRatio     float64
-	language       string
-	languages      []string
-	checkboxOff    string
-	checkboxOn     string
-	radiobuttonOff string
-	radiobuttonOn  string
-}
-*/
 func (session *sessionData) DarkTheme() bool {
 	return session.darkTheme
 }
@@ -39,27 +25,17 @@ func (session *sessionData) TextDirection() int {
 func (session *sessionData) constant(tag string, prevTags []string) (string, bool) {
 	tags := append(prevTags, tag)
 	result := ""
-	themes := session.themes()
+	theme := session.getCurrentTheme()
 	for {
 		ok := false
 		if session.touchScreen {
-			for _, theme := range themes {
+			if theme.touchConstants != nil {
-				if theme.touchConstants != nil {
+				result, ok = theme.touchConstants[tag]
-					if result, ok = theme.touchConstants[tag]; ok {
-						break
-					}
-				}
 			}
 		}
 
 		if !ok {
-			for _, theme := range themes {
+			result, ok = theme.constants[tag]
-				if theme.constants != nil {
-					if result, ok = theme.constants[tag]; ok {
-						break
-					}
-				}
-			}
 		}
 
 		if !ok {
@@ -149,38 +125,38 @@ func (session *sessionData) Constant(tag string) (string, bool) {
 	return session.constant(tag, []string{})
 }
 
-func (session *sessionData) themes() []*theme {
+func (session *sessionData) getCurrentTheme() *theme {
-	if session.customTheme != nil {
+	if session.currentTheme != nil {
-		return []*theme{session.customTheme, defaultTheme}
+		return session.currentTheme
 	}
 
-	return []*theme{defaultTheme}
+	if session.customTheme != nil {
+		session.currentTheme = new(theme)
+		session.currentTheme.init()
+		session.currentTheme.concat(defaultTheme)
+		session.currentTheme.concat(session.customTheme)
+		return session.currentTheme
+	}
+
+	return defaultTheme
 }
 
 // Color return the color with "tag" name or 0 if it is not exists
 func (session *sessionData) Color(tag string) (Color, bool) {
 	tags := []string{tag}
 	result := ""
-	themes := session.themes()
+	theme := session.getCurrentTheme()
 	for {
 		ok := false
 		if session.darkTheme {
-			for _, theme := range themes {
+			if theme.darkColors != nil {
-				if theme.darkColors != nil {
+				result, ok = theme.darkColors[tag]
-					if result, ok = theme.darkColors[tag]; ok {
-						break
-					}
-				}
 			}
 		}
 
 		if !ok {
-			for _, theme := range themes {
+			if theme.colors != nil {
-				if theme.colors != nil {
+				result, ok = theme.colors[tag]
-					if result, ok = theme.colors[tag]; ok {
-						break
-					}
-				}
 			}
 		}
 
@@ -217,6 +193,7 @@ func (session *sessionData) SetCustomTheme(name string) bool {
 		}
 	} else if theme, ok := resources.themes[name]; ok {
 		session.customTheme = theme
+		session.currentTheme = nil
 	} else {
 		return false
 	}
@@ -361,3 +338,39 @@ func (session *sessionData) SetLanguage(lang string) {
 		}
 	}
 }
+
+func (session *sessionData) ConstantTags() []string {
+	theme := session.getCurrentTheme()
+
+	keys := make([]string, 0, len(theme.constants))
+	for k := range theme.constants {
+		keys = append(keys, k)
+	}
+
+	for tag := range theme.touchConstants {
+		if _, ok := theme.constants[tag]; !ok {
+			keys = append(keys, tag)
+		}
+	}
+
+	sort.Strings(keys)
+	return keys
+}
+
+func (session *sessionData) ColorTags() []string {
+	theme := session.getCurrentTheme()
+
+	keys := make([]string, 0, len(theme.colors))
+	for k := range theme.colors {
+		keys = append(keys, k)
+	}
+
+	for tag := range theme.darkColors {
+		if _, ok := theme.colors[tag]; !ok {
+			keys = append(keys, tag)
+		}
+	}
+
+	sort.Strings(keys)
+	return keys
+}

tableViewUtils.go

@@ -230,3 +230,21 @@ func GetTableRowSelectedListeners(view View, subviewID string) []func(TableView,
 	}
 	return []func(TableView, int){}
 }
+
+// ReloadTableViewData updates TableView
+func ReloadTableViewData(view View, subviewID string) bool {
+	var tableView TableView
+	if subviewID != "" {
+		if tableView = TableViewByID(view, subviewID); tableView == nil {
+			return false
+		}
+	} else {
+		var ok bool
+		if tableView, ok = view.(TableView); !ok {
+			return false
+		}
+	}
+
+	tableView.ReloadTableData()
+	return true
+}

tabsLayout.go

@@ -147,7 +147,7 @@ func (tabsLayout *tabsLayoutData) remove(tag string) {
 			return
 		}
 		if tabsLayout.created {
-			tabsLayout.session.runScript(fmt.Sprintf("activateTab(%v, %d);", tabsLayout.htmlID(), 0))
+			tabsLayout.session.runScript(fmt.Sprintf("activateTab('%v', %d);", tabsLayout.htmlID(), 0))
 			for _, listener := range tabsLayout.tabListener {
 				listener(tabsLayout, 0, oldCurrent)
 			}
@@ -224,7 +224,7 @@ func (tabsLayout *tabsLayoutData) set(tag string, value interface{}) bool {
 			return true
 		}
 		if tabsLayout.created {
-			tabsLayout.session.runScript(fmt.Sprintf("activateTab(%v, %d);", tabsLayout.htmlID(), current))
+			tabsLayout.session.runScript(fmt.Sprintf("activateTab('%v', %d);", tabsLayout.htmlID(), current))
 			for _, listener := range tabsLayout.tabListener {
 				listener(tabsLayout, current, oldCurrent)
 			}

theme.go

@@ -16,7 +16,7 @@ type mediaStyle struct {
 	orientation int
 	width       int
 	height      int
-	styles      map[string]DataObject
+	styles      map[string]Params
 }
 
 func (rule mediaStyle) cssText() string {
@@ -47,7 +47,7 @@ func (rule mediaStyle) cssText() string {
 }
 
 func parseMediaRule(text string) (mediaStyle, bool) {
-	rule := mediaStyle{orientation: defaultMedia, width: 0, height: 0, styles: map[string]DataObject{}}
+	rule := mediaStyle{orientation: defaultMedia, width: 0, height: 0, styles: map[string]Params{}}
 	elements := strings.Split(text, ":")
 	for i := 1; i < len(elements); i++ {
 		switch element := elements[i]; element {
@@ -111,7 +111,7 @@ type theme struct {
 	touchConstants map[string]string
 	colors         map[string]string
 	darkColors     map[string]string
-	styles         map[string]DataObject
+	styles         map[string]Params
 	mediaStyles    []mediaStyle
 }
 
@@ -129,7 +129,7 @@ func (theme *theme) init() {
 	theme.touchConstants = map[string]string{}
 	theme.colors = map[string]string{}
 	theme.darkColors = map[string]string{}
-	theme.styles = map[string]DataObject{}
+	theme.styles = map[string]Params{}
 	theme.mediaStyles = []mediaStyle{}
 }
 
@@ -189,7 +189,9 @@ func (theme *theme) cssText(session Session) string {
 	for tag, obj := range theme.styles {
 		var style viewStyle
 		style.init()
-		parseProperties(&style, obj)
+		for tag, value := range obj {
+			style.Set(tag, value)
+		}
 		builder.startStyle(tag)
 		style.cssViewStyle(&builder, session)
 		builder.endStyle()
@@ -200,7 +202,9 @@ func (theme *theme) cssText(session Session) string {
 		for tag, obj := range media.styles {
 			var style viewStyle
 			style.init()
-			parseProperties(&style, obj)
+			for tag, value := range obj {
+				style.Set(tag, value)
+			}
 			builder.startStyle(tag)
 			style.cssViewStyle(&builder, session)
 			builder.endStyle()
@@ -234,6 +238,25 @@ func (theme *theme) addData(data DataObject) {
 func (theme *theme) parseThemeData(data DataObject) {
 	count := data.PropertyCount()
 
+	objToParams := func(obj DataObject) Params {
+		params := Params{}
+		for i := 0; i < obj.PropertyCount(); i++ {
+			if node := obj.Property(i); node != nil {
+				switch node.Type() {
+				case ArrayNode:
+					params[node.Tag()] = node.ArrayElements()
+
+				case ObjectNode:
+					params[node.Tag()] = node.Object()
+
+				default:
+					params[node.Tag()] = node.Text()
+				}
+			}
+		}
+		return params
+	}
+
 	for i := 0; i < count; i++ {
 		if d := data.Property(i); d != nil {
 			switch tag := d.Tag(); tag {
@@ -291,7 +314,7 @@ func (theme *theme) parseThemeData(data DataObject) {
 					for k := 0; k < arraySize; k++ {
 						if element := d.ArrayElement(k); element != nil && element.IsObject() {
 							if obj := element.Object(); obj != nil {
-								theme.styles[obj.Tag()] = obj
+								theme.styles[obj.Tag()] = objToParams(obj)
 							}
 						}
 					}
@@ -304,7 +327,7 @@ func (theme *theme) parseThemeData(data DataObject) {
 						for k := 0; k < arraySize; k++ {
 							if element := d.ArrayElement(k); element != nil && element.IsObject() {
 								if obj := element.Object(); obj != nil {
-									rule.styles[obj.Tag()] = obj
+									rule.styles[obj.Tag()] = objToParams(obj)
 								}
 							}
 						}

view.go

@@ -177,6 +177,9 @@ func (view *viewData) ViewByID(id string) View {
 }
 
 func (view *viewData) Focusable() bool {
+	if focus, ok := boolProperty(view, Focusable, view.session); ok {
+		return focus
+	}
 	return false
 }
 
@@ -189,6 +192,9 @@ func (view *viewData) remove(tag string) {
 	case ID:
 		view.viewID = ""
 
+	case UserData:
+		delete(view.properties, tag)
+
 	case Style, StyleDisabled:
 		if _, ok := view.properties[tag]; ok {
 			delete(view.properties, tag)
@@ -311,6 +317,9 @@ func (view *viewData) set(tag string, value interface{}) bool {
 		}
 		view.viewID = text
 
+	case UserData:
+		view.properties[tag] = value
+
 	case Style, StyleDisabled:
 		text, ok := value.(string)
 		if !ok {

viewFactory.go

@@ -1,6 +1,7 @@
 package rui
 
 import (
+	"os"
 	"path/filepath"
 	"strings"
 )
@@ -135,5 +136,13 @@ func CreateViewFromResources(session Session, name string) View {
 		}
 	}
 
+	if resources.path != "" {
+		if data, err := os.ReadFile(resources.path + viewDir + "/" + name); err == nil {
+			if data := ParseDataText(string(data)); data != nil {
+				return CreateViewFromObject(session, data)
+			}
+		}
+	}
+
 	return nil
 }

viewUtils.go

@@ -1053,19 +1053,13 @@ func GetCurrent(view View, subviewID string) int {
 		view = ViewByID(view, subviewID)
 	}
 
-	var defaultValue int
+	defaultValue := -1
-	switch view.Tag() {
-	case "ListView":
-		defaultValue = -1
-
-	default:
-		defaultValue = 0
-	}
-
 	if view != nil {
 		if result, ok := intProperty(view, Current, view.Session(), defaultValue); ok {
 			return result
+		} else if view.Tag() != "ListView" {
+			defaultValue = 0
 		}
 	}
-	return -1
+	return defaultValue
 }