U: lcl window SetFocus

cef/browser-window-lcl_windows.go

@@ -75,11 +75,13 @@ func (m *LCLBrowserWindow) FramelessForLine() {
 	win.SetWindowPos(m.Handle(), 0, 0, 0, 0, 0, uint32(win.SWP_NOMOVE|win.SWP_NOSIZE|win.SWP_FRAMECHANGED))
 }
 
-// SetFocus 设置窗口焦点
+// SetFocus
+//  在窗口 (Visible = true) 显示之后设置窗口焦点
 //  https://learn.microsoft.com/zh-cn/windows/win32/api/winuser/nf-winuser-showwindow
 //  https://learn.microsoft.com/zh-cn/windows/win32/api/winuser/nf-winuser-setfocus
 func (m *LCLBrowserWindow) SetFocus() {
 	if m.TForm != nil {
+		m.Visible()
 		//窗口\激活在Z序中的下个顶层窗口
 		m.Minimize()
 		//激活窗口出现在前景

example/tray/lcltray/lcltray.go

@@ -55,6 +55,11 @@ func trayDemo(browserWindow cef.IBrowserWindow) {
 	})
 	tray.AddMenuItem("显示/隐藏", func() {
 		window.SetVisible(!window.Visible())
+		if window.Visible() { //之后的显示状态
+			window.RunOnMainThread(func() {
+				window.SetFocus()
+			})
+		}
 	})
 	tray.AddMenuItem("退出", func() {
 		browserWindow.CloseBrowserWindow()