Improved binding for no args listeners

events.go

@@ -67,6 +67,96 @@ func updateEventListenerHtml(view View, tag PropertyName) {
 	}
 }
 
+type noArgListener[V View] interface {
+	Run(V)
+	rawListener() any
+}
+
+type noArgListener0[V View] struct {
+	fn func()
+}
+
+type noArgListenerV[V View] struct {
+	fn func(V)
+}
+
+type noArgListenerBinding[V View] struct {
+	name string
+}
+
+func newNoArgListener0[V View](fn func()) noArgListener[V] {
+	obj := new(noArgListener0[V])
+	obj.fn = fn
+	return obj
+}
+
+func (data *noArgListener0[V]) Run(_ V) {
+	data.fn()
+}
+
+func (data *noArgListener0[V]) rawListener() any {
+	return data.fn
+}
+
+func newNoArgListenerV[V View](fn func(V)) noArgListener[V] {
+	obj := new(noArgListenerV[V])
+	obj.fn = fn
+	return obj
+}
+
+func (data *noArgListenerV[V]) Run(view V) {
+	data.fn(view)
+}
+
+func (data *noArgListenerV[V]) rawListener() any {
+	return data.fn
+}
+
+func newNoArgListenerBinding[V View](name string) noArgListener[V] {
+	obj := new(noArgListenerBinding[V])
+	obj.name = name
+	return obj
+}
+
+func (data *noArgListenerBinding[V]) Run(view V) {
+	bind := view.binding()
+	if bind == nil {
+		ErrorLogF(`There is no a binding object for call "%s"`, data.name)
+		return
+	}
+
+	val := reflect.ValueOf(bind)
+	method := val.MethodByName(data.name)
+	if !method.IsValid() {
+		ErrorLogF(`The "%s" method is not valid`, data.name)
+		return
+	}
+
+	methodType := method.Type()
+	var args []reflect.Value = nil
+	switch methodType.NumIn() {
+	case 0:
+		args = []reflect.Value{}
+
+	case 1:
+		inType := methodType.In(0)
+		if inType == reflect.TypeOf(view) {
+			args = []reflect.Value{reflect.ValueOf(view)}
+		}
+	}
+
+	if args != nil {
+		method.Call(args)
+	} else {
+		ErrorLogF(`Unsupported prototype of "%s" method`, data.name)
+	}
+}
+
+func (data *noArgListenerBinding[V]) rawListener() any {
+	return data.name
+}
+
+/*
 func valueToNoArgEventListeners[V any](view View, value any) ([]func(V), bool) {
 	if value == nil {
 		return nil, true
@@ -173,20 +263,74 @@ func valueToNoArgEventListeners[V any](view View, value any) ([]func(V), bool) {
 
 	return nil, false
 }
+*/
 
-func getNoArgEventListeners[V View](view View, subviewID []string, tag PropertyName) []func(V) {
+func valueToNoArgEventListeners[V View](value any) ([]noArgListener[V], bool) {
-	if view = getSubview(view, subviewID); view != nil {
+	if value == nil {
-		if value := view.Get(tag); value != nil {
+		return nil, true
-			if result, ok := value.([]func(V)); ok {
+	}
-				return result
+
+	switch value := value.(type) {
+	case []noArgListener[V]:
+		return value, true
+
+	case noArgListener[V]:
+		return []noArgListener[V]{value}, true
+
+	case string:
+		return []noArgListener[V]{newNoArgListenerBinding[V](value)}, true
+
+	case func(V):
+		return []noArgListener[V]{newNoArgListenerV(value)}, true
+
+	case func():
+		return []noArgListener[V]{newNoArgListener0[V](value)}, true
+
+	case []func(V):
+		result := make([]noArgListener[V], 0, len(value))
+		for _, fn := range value {
+			if fn != nil {
+				result = append(result, newNoArgListenerV(fn))
+			}
+		}
+		return result, len(result) > 0
+
+	case []func():
+		result := make([]noArgListener[V], 0, len(value))
+		for _, fn := range value {
+			if fn != nil {
+				result = append(result, newNoArgListener0[V](fn))
+			}
+		}
+		return result, len(result) > 0
+
+	case []any:
+		result := make([]noArgListener[V], 0, len(value))
+		for _, v := range value {
+			if v != nil {
+				switch v := v.(type) {
+				case func(V):
+					result = append(result, newNoArgListenerV(v))
+
+				case func():
+					result = append(result, newNoArgListener0[V](v))
+
+				case string:
+					result = append(result, newNoArgListenerBinding[V](v))
+
+				default:
+					return nil, false
 				}
 			}
 		}
-	return []func(V){}
+		return result, len(result) > 0
+	}
+
+	return nil, false
 }
 
 func setNoArgEventListener[V View](view View, tag PropertyName, value any) []PropertyName {
-	if listeners, ok := valueToNoArgEventListeners[V](view, value); ok {
+	if listeners, ok := valueToNoArgEventListeners[V](value); ok {
 		if len(listeners) > 0 {
 			view.setRaw(tag, listeners)
 		} else if view.getRaw(tag) != nil {
@@ -199,3 +343,23 @@ func setNoArgEventListener[V View](view View, tag PropertyName, value any) []Pro
 	notCompatibleType(tag, value)
 	return nil
 }
+
+func getNoArgEventListeners[V View](view View, subviewID []string, tag PropertyName) []noArgListener[V] {
+	if view = getSubview(view, subviewID); view != nil {
+		if value := view.Get(tag); value != nil {
+			if result, ok := value.([]noArgListener[V]); ok {
+				return result
+			}
+		}
+	}
+	return []noArgListener[V]{}
+}
+
+func getNoArgEventRawListeners[V View](view View, subviewID []string, tag PropertyName) []any {
+	listeners := getNoArgEventListeners[V](view, subviewID, tag)
+	result := make([]any, len(listeners))
+	for i, l := range listeners {
+		result[i] = l.rawListener()
+	}
+	return result
+}

focusEvents.go

@@ -50,16 +50,26 @@ func focusEventsHtml(view View, buffer *strings.Builder) {
 
 // GetFocusListeners returns a FocusListener list. If there are no listeners then the empty list is returned
 //
+// Result elements can be of the following types:
+//   - func(rui.View),
+//   - func(),
+//   - string.
+//
 // The second argument (subviewID) specifies the path to the child element whose value needs to be returned.
 // If it is not specified then a value from the first argument (view) is returned.
-func GetFocusListeners(view View, subviewID ...string) []func(View) {
+func GetFocusListeners(view View, subviewID ...string) []any {
-	return getNoArgEventListeners[View](view, subviewID, FocusEvent)
+	return getNoArgEventRawListeners[View](view, subviewID, FocusEvent)
 }
 
 // GetLostFocusListeners returns a LostFocusListener list. If there are no listeners then the empty list is returned
 //
+// Result elements can be of the following types:
+//   - func(rui.View),
+//   - func(),
+//   - string.
+//
 // The second argument (subviewID) specifies the path to the child element whose value needs to be returned.
 // If it is not specified then a value from the first argument (view) is returned.
-func GetLostFocusListeners(view View, subviewID ...string) []func(View) {
+func GetLostFocusListeners(view View, subviewID ...string) []any {
-	return getNoArgEventListeners[View](view, subviewID, LostFocusEvent)
+	return getNoArgEventRawListeners[View](view, subviewID, LostFocusEvent)
 }

imageView.go

@@ -300,7 +300,7 @@ func (imageView *imageViewData) handleCommand(self View, command PropertyName, d
 	switch command {
 	case "imageViewError":
 		for _, listener := range getNoArgEventListeners[ImageView](imageView, nil, ErrorEvent) {
-			listener(imageView)
+			listener.Run(imageView)
 		}
 
 	case "imageViewLoaded":
@@ -309,7 +309,7 @@ func (imageView *imageViewData) handleCommand(self View, command PropertyName, d
 		imageView.currentSrc, _ = data.PropertyValue("current-src")
 
 		for _, listener := range getNoArgEventListeners[ImageView](imageView, nil, LoadedEvent) {
-			listener(imageView)
+			listener.Run(imageView)
 		}
 
 	default:
@@ -370,3 +370,31 @@ func GetImageViewVerticalAlign(view View, subviewID ...string) int {
 func GetImageViewHorizontalAlign(view View, subviewID ...string) int {
 	return enumStyledProperty(view, subviewID, ImageHorizontalAlign, LeftAlign, false)
 }
+
+// GetImageViewErrorEventListeners returns the list of "error-event" event listeners.
+// If there are no listeners then the empty list is returned
+//
+// Result elements can be of the following types:
+//   - func(rui.ImageView)
+//   - func()
+//   - string
+//
+// The second argument (subviewID) specifies the path to the child element whose value needs to be returned.
+// If it is not specified then a value from the first argument (view) is returned.
+func GetImageViewErrorEventListeners(view View, subviewID ...string) []any {
+	return getNoArgEventRawListeners[View](view, subviewID, ErrorEvent)
+}
+
+// GetImageViewLoadedEventListeners returns the list of "loaded-event" event listeners.
+// If there are no listeners then the empty list is returned
+//
+// Result elements can be of the following types:
+//   - func(rui.ImageView)
+//   - func()
+//   - string
+//
+// The second argument (subviewID) specifies the path to the child element whose value needs to be returned.
+// If it is not specified then a value from the first argument (view) is returned.
+func GetImageViewLoadedEventListeners(view View, subviewID ...string) []any {
+	return getNoArgEventRawListeners[View](view, subviewID, LoadedEvent)
+}

popup.go

@@ -2,6 +2,7 @@ package rui
 
 import (
 	"fmt"
+	"reflect"
 	"strings"
 )
 
@@ -281,13 +282,30 @@ type Popup interface {
 	dissmissAnimation(listener func(PropertyName)) bool
 }
 
+type popupListener interface {
+	Run(Popup)
+	rawListener() any
+}
+
+type popupListener0 struct {
+	fn func()
+}
+
+type popupListener1 struct {
+	fn func(Popup)
+}
+
+type popupListenerBinding struct {
+	name string
+}
+
 type popupData struct {
 	layerView       GridLayout
 	popupView       GridLayout
 	contentView     View
 	buttons         []PopupButton
 	cancelable      bool
-	dismissListener []func(Popup)
+	dismissListener []popupListener
 	showTransform   TransformProperty
 	showOpacity     float64
 	showDuration    float64
@@ -649,7 +667,7 @@ func (popup *popupData) init(view View, popupParams Params) {
 				}
 
 			case DismissEvent:
-				if listeners, ok := valueToNoArgEventListeners[Popup](popup.contentView, value); ok {
+				if listeners, ok := valueToPopupEventListeners(value); ok {
 					if listeners != nil {
 						popup.dismissListener = listeners
 					}
@@ -887,7 +905,7 @@ func (popup *popupData) onDismiss() {
 	popup.Session().callFunc("removeView", popup.layerView.htmlID())
 
 	for _, listener := range popup.dismissListener {
-		listener(popup)
+		listener.Run(popup)
 	}
 }
 
@@ -1014,3 +1032,139 @@ func (manager *popupManager) dismissPopup(popup Popup) {
 		listener("")
 	}
 }
+
+func newPopupListener0(fn func()) popupListener {
+	obj := new(popupListener0)
+	obj.fn = fn
+	return obj
+}
+
+func (data *popupListener0) Run(_ Popup) {
+	data.fn()
+}
+
+func (data *popupListener0) rawListener() any {
+	return data.fn
+}
+
+func newPopupListener1(fn func(Popup)) popupListener {
+	obj := new(popupListener1)
+	obj.fn = fn
+	return obj
+}
+
+func (data *popupListener1) Run(popup Popup) {
+	data.fn(popup)
+}
+
+func (data *popupListener1) rawListener() any {
+	return data.fn
+}
+
+func newPopupListenerBinding(name string) popupListener {
+	obj := new(popupListenerBinding)
+	obj.name = name
+	return obj
+}
+
+func (data *popupListenerBinding) Run(popup Popup) {
+	bind := popup.View().binding()
+	if bind == nil {
+		ErrorLogF(`There is no a binding object for call "%s"`, data.name)
+		return
+	}
+
+	val := reflect.ValueOf(bind)
+	method := val.MethodByName(data.name)
+	if !method.IsValid() {
+		ErrorLogF(`The "%s" method is not valid`, data.name)
+		return
+	}
+
+	methodType := method.Type()
+	var args []reflect.Value = nil
+	switch methodType.NumIn() {
+	case 0:
+		args = []reflect.Value{}
+
+	case 1:
+		inType := methodType.In(0)
+		if inType == reflect.TypeOf(popup) {
+			args = []reflect.Value{reflect.ValueOf(popup)}
+		}
+	}
+
+	if args != nil {
+		method.Call(args)
+	} else {
+		ErrorLogF(`Unsupported prototype of "%s" method`, data.name)
+	}
+}
+
+func (data *popupListenerBinding) rawListener() any {
+	return data.name
+}
+
+func valueToPopupEventListeners(value any) ([]popupListener, bool) {
+	if value == nil {
+		return nil, true
+	}
+
+	switch value := value.(type) {
+	case []popupListener:
+		return value, true
+
+	case popupListener:
+		return []popupListener{value}, true
+
+	case string:
+		return []popupListener{newPopupListenerBinding(value)}, true
+
+	case func(Popup):
+		return []popupListener{newPopupListener1(value)}, true
+
+	case func():
+		return []popupListener{newPopupListener0(value)}, true
+
+	case []func(Popup):
+		result := make([]popupListener, 0, len(value))
+		for _, fn := range value {
+			if fn != nil {
+				result = append(result, newPopupListener1(fn))
+			}
+		}
+		return result, len(result) > 0
+
+	case []func():
+		result := make([]popupListener, 0, len(value))
+		for _, fn := range value {
+			if fn != nil {
+				result = append(result, newPopupListener0(fn))
+			}
+		}
+		return result, len(result) > 0
+
+	case []any:
+		result := make([]popupListener, 0, len(value))
+		for _, v := range value {
+			if v != nil {
+				switch v := v.(type) {
+				case func(Popup):
+					result = append(result, newPopupListener1(v))
+
+				case func():
+					result = append(result, newPopupListener0(v))
+
+				case string:
+					result = append(result, newPopupListenerBinding(v))
+
+				default:
+					return nil, false
+				}
+			}
+		}
+		return result, len(result) > 0
+	}
+
+	return nil, false
+}

view.go

@@ -1162,13 +1162,13 @@ func (view *viewData) handleCommand(self View, command PropertyName, data DataOb
 	case FocusEvent:
 		view.hasFocus = true
 		for _, listener := range getNoArgEventListeners[View](view, nil, command) {
-			listener(self)
+			listener.Run(self)
 		}
 
 	case LostFocusEvent:
 		view.hasFocus = false
 		for _, listener := range getNoArgEventListeners[View](view, nil, command) {
-			listener(self)
+			listener.Run(self)
 		}
 
 	case TransitionRunEvent, TransitionStartEvent, TransitionEndEvent, TransitionCancelEvent: