Question

I have a QWidget and i need to do some actions (refresh a picture in widget) when resize event ends. How can i catch this action?
I need to catch moment when user ENDs all his resize actions by releasing mouse button. It is not a good practice in my application to refresh image every pixel resized. It should calls only when mouse released and resize actions ends.

I am just tried to reimplement QMouseReleaseEvent to catch it, but it do not works when user presses on the border of widget to resize it. It means does not working in our situation.

Then i was tried to create my own QSizeGrip and insert it on the bottom of my widget, but reimplemented event QMouseReleaseEvent again did not work in it. Event did not generates any time user released mouse. I do not know why.

Anybody can help me with that problem?

Thanks in advance.

Answer 1

Mouse events on windows decoration are managed by the underlying window system, this is why you can’t catch them as you tried.
I had the same issue once, the solution I chose was to (re)start a singleshot QTimer on each resize event, and only process the update after the timer interval elapsed. Not very sexy but I did not find any other workaround..