How can I detect mouse motion in Qt?

Question

I'm writing something using Qt Widgets (C++). I need to detect when mouse is moved (either outside or inside the application window) and update cursor coordinates on my app window. I can't find any way to do it. I wonder if it's possible to use connect( ... ) statement.

Target is Win10.

Possible dupe: https://stackoverflow.com/questions/18559791/mouse-events-in-qt — πάντα ῥεῖ, Jun 07 '23 at 18:47
And [https://stackoverflow.com/questions/18551387/tracking-mouse-coordinates-in-qt/18552004#18552004](https://stackoverflow.com/questions/18551387/tracking-mouse-coordinates-in-qt/18552004#18552004) — drescherjm, Jun 07 '23 at 18:49
[Getting MouseMoveEvents in Qt](https://stackoverflow.com/questions/1935021/getting-mousemoveevents-in-qt) — Abderrahmene Rayene Mihoub, Jun 07 '23 at 19:01
No dupe. That only considers mouse interaction in the app itself, but this is not the case. — sudo_woodo, Jun 09 '23 at 19:05

score 0 · Accepted Answer · answered Jun 09 '23 at 19:00

I figured out the best way to do it is using WinAPI through the WH_MOUSE_LL hook, as it seems Qt can only manage mouse events related to its own app.

I did it this way:

SetWindowsHookEx( WH_MOUSE_LL, doSomethingWhenMouseMoves, NULL, 0 );

More info: https://learn.microsoft.com/en-us/previous-versions/windows/desktop/legacy/ms644986(v=vs.85)

How can I detect mouse motion in Qt?

1 Answers1