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Editorial Team
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Asked: 2026-05-27T12:59:14+00:00

I am writing Qt application which plays a fade-in animation whenever the mouse is

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I am writing Qt application which plays a fade-in animation whenever the mouse is moved to a certain area in the screen, and a fade out animation whenever the mouse is moved out of that same area.

I’ve already found a similar question here in stack overflow, however, it does not quite answer my question. (similar question here)

If I install an event filter to the application, will I be able to see ALL the events in the application even if it’s outside my widget window?

If not, I am aware of an alternative involving QWidget::grabMouse() inside a reimplementation of leaveEvent(). But if I do so, will I be able to interact with anything OUTSIDE my application?

edit: though i am using the Qt library, my application is only for deployment to Windows.

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1 Answer

  1. Editorial Team

    I’m fairly the certain the answer is no, because events outside of your widgets are handled by the OSs window manager (and propagated onto whatever application is in that space).

    However you can get the mouse position anywhere on the screen by calling QCursor::pos(), you could poll at regular intervals to find out where the mouse is.

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