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Fixed in 2019.3.X
Votes
1
Found in
2018.1.2f1
Issue ID
1045195
Regression
No
[Windows] TreeView.HandleDragAndDrop(DragAndDropArgs args) is not called when the Cursor is dragging a Row
To reproduce:
1. Download attached project "TreeView Drag Bug.zip" and open in Unity
2. Open "scene_main" scene
3. Press Window > Open TreeView Test Window
4. Try Drag and Drop for example "Red" on "Blue"
Expected results: TreeView.HandleDragAndDrop(DragAndDropArgs args) would be called with 'args.dragAndDropPosition' equaling the correct DragAndDropPosition value (BetweenItems, OntoItem, etc)
Actual results: TreeView.HandleDragAndDrop(DragAndDropArgs args) is not called when the cursor is dragging a row. Instead, TreeView.HandleDragAndDrop(DragAndDropArgs args) is not called at all, and TreeView.SetupDragAndDrop(SetupDragAndDropArgs args) is called on MouseRelease instead of MouseDrag
Notes:
- This issue reproduces only on Windows
- Could not reproduce this issue on OSX because of this bug:
https://issuetracker.unity3d.com/issues/osx-no-drag-and-drop-has-been-setup-please-error-when-dragging-any-item-in-unity
Reproduced on Unity 2017.1.4f1, 2017.2.3p1, 2017.3.2f1, 2017.4.5f1, 2018.1.4f1, 2018.2.0b7 and 2018.3.0a1
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Firadzo
Dec 14, 2018 11:37
I am was able to receive TreeView.HandleDragAndDrop callback after calling DragAndDrop.StartDrag("Dragging") inside of SetupDragAndDrop.
DrPhilippe
Aug 29, 2018 12:08
do it inside SetupDragAndDrop :)
DrPhilippe
Aug 29, 2018 12:08
try this:
DragAndDrop.activeControlID = args.draggedItemIDs[0];