[v3 linux] dbus menu icon support

v3/examples/systray/main.go

@@ -48,6 +48,8 @@ func main() {
 	}
 
 	myMenu := app.NewMenu()
+	myMenu.Add("Wails").SetBitmap(icons.WailsLogoBlackTransparent).SetEnabled(false)
+
 	myMenu.Add("Hello World!").OnClick(func(ctx *application.Context) {
 		println("Hello World!")
 		q := application.QuestionDialog().SetTitle("Ready?").SetMessage("Are you feeling ready?")

v3/pkg/application/systemtray_linux.go

@@ -56,6 +56,11 @@ type systrayMenuItem struct {
 	dbusItem *dbusMenu
 }
 
+func (s *systrayMenuItem) setBitmap(data []byte) {
+	s.dbusItem.V1["icon-data"] = dbus.MakeVariant(data)
+	s.sysTray.update(s)
+}
+
 func (s *systrayMenuItem) setTooltip(v string) {
 	s.dbusItem.V1["tooltip"] = dbus.MakeVariant(v)
 	s.sysTray.update(s)
@@ -129,6 +134,9 @@ func (s *linuxSystemTray) processMenu(menu *Menu, parentId int32) {
 		if item.label != "" {
 			menuItem.V1["label"] = dbus.MakeVariant(item.label)
 		}
+		if item.bitmap != nil {
+			menuItem.V1["icon-data"] = dbus.MakeVariant(item.bitmap)
+		}
 		switch item.itemType {
 		case checkbox:
 			menuItem.V1["toggle-type"] = dbus.MakeVariant("checkmark")
@@ -446,6 +454,13 @@ func (s *linuxSystemTray) createPropSpec() map[string]map[string]*prop.Prop {
 			Emit:     prop.EmitTrue,
 			Callback: nil,
 		},
+		"IconData": {
+			Value:    "",
+			Writable: false,
+			Emit:     prop.EmitTrue,
+			Callback: nil,
+		},
+
 		"IconName": {
 			Value:    "",
 			Writable: false,