Mouse State locked to drag-drop state

Submitted by LaMain

Assigned to Olivier Fourdan @olivier

Link to original bug (#12572)

Description

Hi,

The Kmetronome app (most specificially a bug in it i think) put the mouse/keyboard focus in the drag-drop state, and can't return to normal. Which involve killing the session to get back stuff to normal.

To reproduce the bug:

• launch KMetronome
• mouse-drag the tempo counter out of its window

KMetronome is a Qt app, and the 'tempo counter' inherits from QGraphicsView, which seems to be the root of the problem.

But anyway, it shouldn't be possible to an application to lock-down a user session.