According to this stack overflow answer it lies a bit more “complicated”.
There are five events: press, click, release, hover and unhover.
- The press event is triggered when the mouse button is pushed down.
- The release event is triggered when the mouse button is released.
- The clicked event is triggered when the mouse button is pushed down and then released afterwards (both pressed and released have been triggered as well at this point).
- hover and unhover are probably self-explaining (hover is when the mouse pointer enters the widget and unhover is when it is leaving the widget)