Feature: Click callbacks

README.md

@@ -10,7 +10,7 @@ systray is a cross-platform Go library to place an icon and menu in the notifica
 
 ```go
 func main() {
-	systray.Run(onReady, onExit)
+	systray.Run(onReady, onExit, onLClick, onRClick)
 }
 
 func onReady() {
@@ -26,6 +26,16 @@ func onReady() {
 func onExit() {
 	// clean up here
 }
+
+func onLClick(shouMenu func() error) {
+	// deal with mouse left click events with shouMenu callback
+	_ = showMenu()
+}
+
+func onRClick(shouMenu func() error) {
+	// deal with mouse right click events with shouMenu callback
+	_ = showMenu()
+}
 ```
 
 See [full API](https://pkg.go.dev/github.com/getlantern/systray?tab=doc) as well as [CHANGELOG](https://github.com/getlantern/systray/tree/master/CHANGELOG.md).

example/main.go

@@ -16,7 +16,7 @@ func main() {
 		ioutil.WriteFile(fmt.Sprintf(`on_exit_%d.txt`, now.UnixNano()), []byte(now.String()), 0644)
 	}
 
-	systray.Run(onReady, onExit)
+	systray.Run(onReady, onExit, nil, nil)
 }
 
 func onReady() {

systray.go

@@ -17,6 +17,9 @@ var (
 
 	systrayReady  func()
 	systrayExit   func()
+	systrayLClick func(showMenu func() error)
+	systrayRClick func(showMenu func() error)
+
 	menuItems     = make(map[uint32]*MenuItem)
 	menuItemsLock sync.RWMutex
 
@@ -73,8 +76,8 @@ func newMenuItem(title string, tooltip string, parent *MenuItem) *MenuItem {
 
 // Run initializes GUI and starts the event loop, then invokes the onReady
 // callback. It blocks until systray.Quit() is called.
-func Run(onReady func(), onExit func()) {
-	Register(onReady, onExit)
+func Run(onReady func(), onExit func(), onLClick func(showMenu func() error), onRClick func(showMenu func() error)) {
+	Register(onReady, onExit, onLClick, onRClick)
 	nativeLoop()
 }
 
@@ -83,7 +86,7 @@ func Run(onReady func(), onExit func()) {
 // needs to show other UI elements, for example, webview.
 // To overcome some OS weirdness, On macOS versions before Catalina, calling
 // this does exactly the same as Run().
-func Register(onReady func(), onExit func()) {
+func Register(onReady func(), onExit func(), onLClick func(showMenu func() error), onRClick func(showMenu func() error)) { // NOTE: 左键点击托盘图标
 	if onReady == nil {
 		systrayReady = func() {}
 	} else {
@@ -103,6 +106,17 @@ func Register(onReady func(), onExit func()) {
 		onExit = func() {}
 	}
 	systrayExit = onExit
+
+	if onLClick == nil {
+		onLClick = func(showMenu func() error) {showMenu()}
+	}
+	systrayLClick = onLClick
+
+	if onRClick == nil {
+		onRClick = func(showMenu func() error ) {showMenu()}
+	}
+	systrayRClick = onRClick
+
 	registerSystray()
 }
 

systray_windows.go

@@ -1,3 +1,4 @@
+//go:build windows
 // +build windows
 
 package systray
@@ -277,8 +278,14 @@ func (t *winTray) wndProc(hWnd windows.Handle, message uint32, wParam, lParam ui
 		systrayExit()
 	case t.wmSystrayMessage:
 		switch lParam {
-		case WM_RBUTTONUP, WM_LBUTTONUP:
-			t.showMenu()
+		case WM_LBUTTONUP:
+			systrayLClick(func() error {
+				return t.showMenu()
+			})
+		case WM_RBUTTONUP:
+			systrayRClick(func() error {
+				return t.showMenu()
+			})
 		}
 	case t.wmTaskbarCreated: // on explorer.exe restarts
 		t.muNID.Lock()

systray_windows_test.go

@@ -128,5 +128,15 @@ func TestWindowsRun(t *testing.T) {
 		t.Log("Exit success")
 	}
 
-	Run(onReady, onExit)
+	onLClick := func(showMenu func()(error)) {
+		t.Log("Mouse Left clicked")
+		_ = showMenu()
+	}
+
+	onRClick := func(showMenu func()(error)) {
+		t.Log("Mouse Right clicked")
+		_ = showMenu()
+	}
+
+	Run(onReady, onExit, onLClick, onRClick)
 }

webview_example/main.go

@@ -6,7 +6,7 @@ import (
 )
 
 func main() {
-	systray.Register(onReady, nil)
+	systray.Register(onReady, nil, nil, nil)
 	configureWebview("Webview example", 1024, 768)
 }