feat: rollback the way to set CENTER. (doesn't work on Wayland)

Author: linhx

main.go

@@ -53,14 +53,14 @@ func setupWindow(title string) *gtk.Window {
 	win.SetTitle(title)
 	win.SetDecorated(false)
 	win.SetDefaultSize(windowWidth, windowHeight)
+	win.SetPosition(gtk.WIN_POS_CENTER)
 	win.Connect("destroy", func() {
 		gtk.MainQuit()
 	})
 	win.Connect("focus-out-event", func(widget *gtk.Window, event *gdk.Event) bool {
 		gtk.MainQuit()
 		return false // Continue with the default behavior
 	})
-	moveWinToCenter(win, windowWidth, windowHeight)
 
 	// vertical button box
 	mainBox, err := gtk.BoxNew(gtk.ORIENTATION_VERTICAL, 2)
@@ -124,18 +124,6 @@ func setupWindow(title string) *gtk.Window {
 	return win
 }
 
-func moveWinToCenter(win *gtk.Window, width int, height int) {
-	screen, _ := gdk.ScreenGetDefault()
-	display, _ := screen.GetDisplay()
-	monitor, _ := display.GetPrimaryMonitor()
-	screenWidth := monitor.GetGeometry().GetWidth()
-	screenHeight := monitor.GetGeometry().GetHeight()
-
-	posX := (screenWidth - width) / 2
-	posY := (screenHeight - height) / 2
-	win.Move(posX, posY)
-}
-
 func getProfiles(profilesIniPath string) []string {
 	profilesCfg, err := ini.Load(profilesIniPath)
 	if err != nil {