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Drag adorner freezes on screen after middle mouse button is pressed #493

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RayCarrot opened this issue Apr 9, 2024 · 1 comment · May be fixed by #497
Open

Drag adorner freezes on screen after middle mouse button is pressed #493

RayCarrot opened this issue Apr 9, 2024 · 1 comment · May be fixed by #497
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Bug
Milestone
4.0.0

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@RayCarrot
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Describe the bug
There appears to be a bug where the drag adorner can freeze in place on screen. The way I've been able to consistently reproduce it is by dragging an item, while holding down my left mouse button, and then pressing the middle mouse button.

To Reproduce
Steps to reproduce the behavior:

  1. Go to the "Mixed" page in the showcase app
  2. Drag any item with the left mouse button, and without letting go press the middle mouse button
  3. The adorner is now stuck on screen and will even overlap other windows

Expected behavior
I expect the drag-drop operation to be fully canceled and the adorner to stop showing

Screenshots
Showcase

Desktop (please complete the following information):

  • OS: Windows 11
  • Version: 23H2
@RayCarrot RayCarrot added the Bug label Apr 9, 2024
@VacuumBreather VacuumBreather linked a pull request Jul 4, 2024 that will close this issue
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@VacuumBreather
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I can confirm this issue, and it happens in our project also under other circumstances, which we haven't been able to reliably reproduce yet, but seem to have the same core issue. State is not correctly reset on Drag Cancellation under certain circumstances. See my PR for a possible fix.

@punker76 punker76 added this to the 4.0.0 milestone Oct 9, 2024
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Always correctly reset state when drag is cancelled VacuumBreather/gong-wpf-dragdrop
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@punker76 @RayCarrot @VacuumBreather