[windows] Add support for click-through overlay window (#3667)

* [windows] Add support for click-through overlay window

* update changelog

* setIgnoreMouseEvents - exemple

* fix - remove unused import

* Add macOS+Linux support. Update example.

* Fix SetIgnoreMouseEvents before window created.

---------

Co-authored-by: Lea Anthony <lea.anthony@gmail.com>

mkdocs-website/docs/en/changelog.md

@@ -22,8 +22,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## v3.0.0-alpha.6 - 2024-07-30
 
-### Fixed 
-- Module issues 
+### Fixed
+- Module issues
 
 ## v3.0.0-alpha.5 - 2024-07-30
 
@@ -47,6 +47,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Implement `setIcon` on linux by [@abichinger](https://github.com/abichinger) in [#3354](https://github.com/wailsapp/wails/pull/3354)
 - Add flag `-port` to dev command and support environment variable `WAILS_VITE_PORT` by [@abichinger](https://github.com/abichinger) in [#3429](https://github.com/wailsapp/wails/pull/3429)
 - Add tests for bound method calls by [@abichinger](https://github.com/abichinger) in [#3431](https://github.com/wailsapp/wails/pull/3431)
+- [windows] add `SetIgnoreMouseEvents` for already created window by [@bruxaodev](https://github.com/bruxaodev) in [#3667](https://github.com/wailsapp/wails/pull/3667)
 
 ### Fixed
 

v3/examples/ignore-mouse/README.md

@@ -0,0 +1,19 @@
+# Window Example
+
+This example is a demonstration of how to disable or enable mouse events.
+
+## Running the example
+
+To run the example, simply run the following command:
+
+```bash
+go run .
+```
+
+# Status
+
+| Platform | Status  |
+|----------|---------|
+| Mac      |         |
+| Windows  | Working |
+| Linux    |         |

v3/examples/ignore-mouse/main.go

@@ -0,0 +1,36 @@
+package main
+
+import (
+	"log"
+
+	"github.com/wailsapp/wails/v3/pkg/application"
+)
+
+func main() {
+	app := application.New(application.Options{
+		Name:        "WebviewWindow Demo",
+		Description: "A demo of the WebviewWindow API",
+		Assets:      application.AlphaAssets,
+		Mac: application.MacOptions{
+			ApplicationShouldTerminateAfterLastWindowClosed: false,
+		},
+	})
+
+	window := app.NewWebviewWindowWithOptions(application.WebviewWindowOptions{
+		Width:             800,
+		Height:            600,
+		Title:             "Ignore Mouse Example",
+		URL:               "https://wails.io",
+		IgnoreMouseEvents: false,
+	})
+
+	window.SetIgnoreMouseEvents(true)
+	log.Println("IgnoreMouseEvents set", window.IsIgnoreMouseEvents())
+
+	err := app.Run()
+
+	if err != nil {
+		log.Fatal(err)
+	}
+
+}

v3/examples/window/main.go

@@ -217,7 +217,7 @@ func main() {
 				Show()
 			windowCounter++
 		})
-	myMenu.Add("New Frameless WebviewWindow").
+	myMenu.Add("New WebviewWindow (Frameless)").
 		SetAccelerator("CmdOrCtrl+F").
 		OnClick(func(ctx *application.Context) {
 			app.NewWebviewWindowWithOptions(application.WebviewWindowOptions{
@@ -231,23 +231,21 @@ func main() {
 			}).Show()
 			windowCounter++
 		})
-	if runtime.GOOS != "linux" {
-		myMenu.Add("New WebviewWindow (ignores mouse events)").
-			SetAccelerator("CmdOrCtrl+F").
-			OnClick(func(ctx *application.Context) {
-				app.NewWebviewWindowWithOptions(application.WebviewWindowOptions{
-					HTML:              "<div style='width: 100%; height: 95%; border: 3px solid red; background-color: \"0000\";'></div>",
-					X:                 rand.Intn(1000),
-					Y:                 rand.Intn(800),
-					IgnoreMouseEvents: true,
-					BackgroundType:    application.BackgroundTypeTransparent,
-					Mac: application.MacWindow{
-						InvisibleTitleBarHeight: 50,
-					},
-				}).Show()
-				windowCounter++
-			})
-	}
+	myMenu.Add("New WebviewWindow (Ignores mouse events)").
+		SetAccelerator("CmdOrCtrl+F").
+		OnClick(func(ctx *application.Context) {
+			app.NewWebviewWindowWithOptions(application.WebviewWindowOptions{
+				HTML:              "<div style='width: 100%; height: 95%; border: 3px solid red; background-color: \"0000\";'></div>",
+				X:                 rand.Intn(1000),
+				Y:                 rand.Intn(800),
+				IgnoreMouseEvents: true,
+				BackgroundType:    application.BackgroundTypeTransparent,
+				Mac: application.MacWindow{
+					InvisibleTitleBarHeight: 50,
+				},
+			}).Show()
+			windowCounter++
+		})
 	if runtime.GOOS == "darwin" {
 		myMenu.Add("New WebviewWindow (MacTitleBarHiddenInset)").
 			OnClick(func(ctx *application.Context) {

v3/pkg/application/webview_window.go

@@ -90,6 +90,8 @@ type (
 		setMinimiseButtonState(state ButtonState)
 		setMaximiseButtonState(state ButtonState)
 		setCloseButtonState(state ButtonState)
+		isIgnoreMouseEvents() bool
+		setIgnoreMouseEvents(ignore bool)
 	}
 )
 
@@ -1232,3 +1234,21 @@ func (w *WebviewWindow) addMenuBinding(a *accelerator, menuItem *MenuItem) {
 	defer w.menuBindingsLock.Unlock()
 	w.menuBindings[a.String()] = menuItem
 }
+
+func (w *WebviewWindow) IsIgnoreMouseEvents() bool {
+	if w.impl == nil && !w.isDestroyed() {
+		return false
+	}
+	return InvokeSyncWithResult(w.impl.isIgnoreMouseEvents)
+}
+
+func (w *WebviewWindow) SetIgnoreMouseEvents(ignore bool) Window {
+	w.options.IgnoreMouseEvents = ignore
+	if w.impl == nil && !w.isDestroyed() {
+		return w
+	}
+	InvokeSync(func() {
+		w.impl.setIgnoreMouseEvents(ignore)
+	})
+	return w
+}

v3/pkg/application/webview_window_darwin.go

@@ -689,12 +689,6 @@ static void windowShowMenu(void *window, void *menu, int x, int y) {
 	[nsMenu popUpMenuPositioningItem:nil atLocation:point inView:webView];
 }
 
-// windowIgnoreMouseEvents makes the window ignore mouse events
-static void windowIgnoreMouseEvents(void *window, bool ignore) {
-	WebviewWindow* nsWindow = (WebviewWindow*)window;
-	[nsWindow setIgnoresMouseEvents:ignore];
-}
-
 // Make the given window frameless
 static void windowSetFrameless(void *window, bool frameless) {
 	WebviewWindow* nsWindow = (WebviewWindow*)window;
@@ -772,6 +766,16 @@ void windowFocus(void *window) {
 	[nsWindow makeKeyWindow];
 }
 
+static bool isIgnoreMouseEvents(void *nsWindow) {
+    NSWindow *window = (__bridge NSWindow *)nsWindow;
+    return [window ignoresMouseEvents];
+}
+
+static void setIgnoreMouseEvents(void *nsWindow, bool ignore) {
+    NSWindow *window = (__bridge NSWindow *)nsWindow;
+    [window setIgnoresMouseEvents:ignore];
+}
+
 */
 import "C"
 import (
@@ -1159,9 +1163,8 @@ func (w *macosWebviewWindow) run() {
 		w.setMaximiseButtonState(options.MaximiseButtonState)
 		w.setCloseButtonState(options.CloseButtonState)
 
-		if options.IgnoreMouseEvents {
-			C.windowIgnoreMouseEvents(w.nsWindow, C.bool(true))
-		}
+		// Ignore mouse events if requested
+		w.setIgnoreMouseEvents(options.IgnoreMouseEvents)
 
 		titleBarOptions := macOptions.TitleBar
 		if !w.parent.options.Frameless {
@@ -1302,3 +1305,11 @@ func (w *macosWebviewWindow) setMaximiseButtonState(state ButtonState) {
 func (w *macosWebviewWindow) setCloseButtonState(state ButtonState) {
 	C.setCloseButtonState(w.nsWindow, C.int(state))
 }
+
+func (w *macosWebviewWindow) isIgnoreMouseEvents() bool {
+	return bool(C.isIgnoreMouseEvents(w.nsWindow))
+}
+
+func (w *macosWebviewWindow) setIgnoreMouseEvents(ignore bool) {
+	C.setIgnoreMouseEvents(w.nsWindow, C.bool(ignore))
+}

v3/pkg/application/webview_window_linux.go

@@ -42,8 +42,9 @@ type linuxWebviewWindow struct {
 	gtkmenu       pointer
 	ctxMenuOpened bool
 
-	moveDebouncer   func(func())
-	resizeDebouncer func(func())
+	moveDebouncer     func(func())
+	resizeDebouncer   func(func())
+	ignoreMouseEvents bool
 }
 
 var (
@@ -280,9 +281,8 @@ func (w *linuxWebviewWindow) run() {
 	case WindowStateNormal:
 	}
 
-	//if w.parent.options.IgnoreMouseEvents {
-	//	windowIgnoreMouseEvents(w.window, w.webview, true)
-	//}
+	// Ignore mouse events if requested
+	w.setIgnoreMouseEvents(options.IgnoreMouseEvents)
 
 	startURL, err := assetserver.GetStartURL(w.parent.options.URL)
 	if err != nil {
@@ -369,3 +369,17 @@ func (w *linuxWebviewWindow) setMaximiseButtonState(state ButtonState) {}
 
 // SetCloseButtonState is unsupported on Linux
 func (w *linuxWebviewWindow) setCloseButtonState(state ButtonState) {}
+
+func (w *linuxWebviewWindow) isIgnoreMouseEvents() bool {
+	return w.ignoreMouseEvents
+}
+
+func (w *linuxWebviewWindow) setIgnoreMouseEvents(ignore bool) {
+	w.ignoreMouseEvents = ignore
+
+	if ignore {
+		C.gtk_widget_set_events((*C.GtkWidget)(unsafe.Pointer(w.window)), C.GDK_ENTER_NOTIFY_MASK|C.GDK_LEAVE_NOTIFY_MASK)
+	} else {
+		C.gtk_widget_set_events((*C.GtkWidget)(unsafe.Pointer(w.window)), C.GDK_ALL_EVENTS_MASK)
+	}
+}

v3/pkg/application/webview_window_windows.go

@@ -279,6 +279,8 @@ func (w *windowsWebviewWindow) run() {
 
 	w.setResizable(!options.DisableResize)
 
+	w.setIgnoreMouseEvents(options.IgnoreMouseEvents)
+
 	if options.Frameless {
 		// Inform the application of the frame change this is needed to trigger the WM_NCCALCSIZE event.
 		// => https://learn.microsoft.com/en-us/windows/win32/dwm/customframe#removing-the-standard-frame
@@ -1761,3 +1763,18 @@ func (w *windowsWebviewWindow) setCloseButtonState(state ButtonState) {
 func (w *windowsWebviewWindow) setGWLStyle(style int) {
 	w32.SetWindowLong(w.hwnd, w32.GWL_STYLE, uint32(style))
 }
+
+func (w *windowsWebviewWindow) isIgnoreMouseEvents() bool {
+	exStyle := w32.GetWindowLong(w.hwnd, w32.GWL_EXSTYLE)
+	return exStyle&w32.WS_EX_TRANSPARENT != 0
+}
+
+func (w *windowsWebviewWindow) setIgnoreMouseEvents(ignore bool) {
+	exStyle := w32.GetWindowLong(w.hwnd, w32.GWL_EXSTYLE)
+	if ignore {
+		exStyle |= w32.WS_EX_LAYERED | w32.WS_EX_TRANSPARENT
+	} else {
+		exStyle &^= w32.WS_EX_TRANSPARENT
+	}
+	w32.SetWindowLong(w.hwnd, w32.GWL_EXSTYLE, uint32(exStyle))
+}

v3/pkg/application/window.go

@@ -36,6 +36,7 @@ type Window interface {
 	Info(message string, args ...any)
 	IsFocused() bool
 	IsFullscreen() bool
+	IsIgnoreMouseEvents() bool
 	IsMaximised() bool
 	IsMinimised() bool
 	HandleKeyEvent(acceleratorString string)
@@ -63,6 +64,7 @@ type Window interface {
 	SetMinSize(minWidth, minHeight int) Window
 	SetRelativePosition(x, y int) Window
 	SetResizable(b bool) Window
+	SetIgnoreMouseEvents(ignore bool) Window
 	SetSize(width, height int) Window
 	SetTitle(title string) Window
 	SetURL(s string) Window