How do I detect if the mouse has left the window when the game isn't fullscreen?

Question

I'm trying to implement scrolling the screen when you move the mouse to the edge of the screen, like in a Blizzard RTS. When the game is fullscreen, there's no problem. But when the game is windowed and I move the mouse off of the window, gettree().getroot().getmouseposition() seems to think that the mouse is still on the window at the last position that it actually was. For example: the mouse's x won't be less than zero even if I move it left off of the window.

The DisplayServer class has what looks like some relevant values in the WindowEvent enum, but it looks like what I want to actually do (just detect if the mouse has left and/or returned to the window) is either unimplemented or undocumented. Or I'm missing something obvious.

Answer 1

it in notification

func _notification(what):
    if what == NOTIFICATION_WM_MOUSE_ENTER:
        print("enter")
    elif what == NOTIFICATION_WM_MOUSE_EXIT:
        print("exit")

you could also try

if what == NOTIFICATION_WM_FOCUS_IN:
    print("focus in")
elif what == NOTIFICATION_WM_FOCUS_OUT:
    print("focus out")

to detect is user tab to other window

Comments

Perfect! Exactly what I was looking for!

And now I have some idea of how to use the _notification() function!