Priority: P2: Important
Resolution: Out of scope
Affects Version/s: 5.12.11, 5.15
Fix Version/s: None
Environment:Dell P2418HT, VS 2017 and VS 2019, Windows SDK 10.0.19041.0 and 10.0.18362.0
Dell - Latitude 5480
Dell - Latitude 5500
Dell Precision 5820 Tower
Calling QDrag::exec() gives hundreds and even thousands of the following message, even during a short drag & drop operation:
QDrag object's modal loop gets so busy (probably waiting for the messages to be written out) that it becomes sluggish and appears hung.
Also, the drop event often gets lost when the messages are being written, causing the object to get stuck waiting for the dragging to end.
All the while, the same message continues to get written out.
Similar discussion is in https://forum.qt.io/topic/123927/qdrag-qdropevent-combase-error-class-not-registered/2
How to reproduce
and try dragging
- Happen with touch panel device
- Both mouse dragging and tap dragging produce the same problem.