<![CDATA[Freezing at QDrag::exec&#40;&#41; 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.

]]>https://forum.qt.io/topic/46597/freezing-at-qdrag-exec-40-41-on-windowsRSS for NodeFri, 24 Apr 2026 13:35:45 GMTThu, 02 Oct 2014 09:28:46 GMT60<![CDATA[Reply to Freezing at QDrag::exec&#40;&#41; on windows on Fri, 03 Oct 2014 21:45:57 GMT]]>What about doing the rendering in a thread and only the "showing" in your GUI ?

]]>https://forum.qt.io/post/246169https://forum.qt.io/post/246169Fri, 03 Oct 2014 21:45:57 GMT<![CDATA[Reply to Freezing at QDrag::exec&#40;&#41; on windows on Fri, 03 Oct 2014 11:58:21 GMT]]>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.

]]>https://forum.qt.io/post/246129https://forum.qt.io/post/246129Fri, 03 Oct 2014 11:58:21 GMT<![CDATA[Reply to Freezing at QDrag::exec&#40;&#41; on windows on Thu, 02 Oct 2014 20:58:26 GMT]]>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

]]>https://forum.qt.io/post/246071https://forum.qt.io/post/246071Thu, 02 Oct 2014 20:58:26 GMT