Question

I have a widget containing multiple child objects, which the user can select by clicking them.

I want to clear the current selection when the user clicks outside the widget and I’m wondering how best to detect these clicks.

Some constraints:

• It’s not really viable to eat the mousePressEvents of surrounding objects through eventFilter.
• If I can avoid using grabMouse(), I’d like to, because of this warning from the docs:
  

  Warning: Bugs in mouse-grabbing applications very often lock the terminal. Use this function with extreme caution, and consider using the -nograb command line option while debugging.

Does that leave me with any other options?

Note: This app will be deployed cross-platform (at the very least Windows and Ubuntu)

Answer 1

I would be inclined to simply check if your widget loses focus, using QWidget’s focusOutEvent