Freezing at QDrag::exec() on windows
hi i would like to ask if somebody knows of a workaround for this problem:
On Windows, the Qt event loop is blocked during the operation. However, QDrag::exec() on Windows causes processEvents() to be called frequently to keep the GUI responsive. If any loops or operations are called while a drag operation is active, it will block the drag operation.
Hi and welcome to devnet,
What kind of loop and operations are you talking about ?
In any case, you could use a flag that you set before calling QDrag'exec and you check before any long loop or operation and postpone its execution.
Hope it helps
Our problem is the opposite, the other events are more important.
We are rendering images on UI and that way creating a video playback.
While drag operation is performed the video becomes choppy (only on windows). The problem I just posted was from Qt documentation, I am wondering if there is a workaround for it.
What about doing the rendering in a thread and only the "showing" in your GUI ?