I have overwritten the function “onmousebuttonup”(i set it up to detect the left mouse button) for a specific image widget,
but when I release the left mouse button over the widget then nothing happens.
Only once I double click on the widget something happens.
I have overwritten the function “onmousebuttonup”(i set it up to detect the left mouse button) for a specific image widget,
I bet OP forgot to handle on mouse down - you can’t have on mouse up if the button was never pressed over the widget in the first place. Unless you do perform hacky Precise Clicks with buttons, that is.