Description

Curve editor (UMG) prevents Play in Editor if the a drag operation is interrupted with a right click. The user is given an error that they cannot play in editor while a drag operation is still on going. However, the user is no longer performing a drag operation.

Steps to Reproduce
  1. Open the editor
  2. Create a new widget blueprint
  3. Add a widget to the designer tab
  4. Create a new animation
  5. Create an animation for the widget
  6. Select Curve editor
  7. Select a key and drag it around
  8. Right click while dragging
  9. Try to play in editor
  10. Notice an error is given "Can't play in editor when performing Mouse Drag Operation"

Expected: The curve would be set and the drag would be canceled once the play in editor button is pressed
Result: The user can no longer play in editor

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Fixed
ComponentUE - Anim - Sequencer
Affects Versions4.12.5
Target Fix4.13
Fix Commit3073592
Main Commit3092051
Release Commit3073592
CreatedAug 1, 2016
ResolvedAug 2, 2016
UpdatedMay 2, 2018
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