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By Design
Votes
0
Found in
2019.4
2020.3
2021.2
2021.2.0f1c1
2022.1
Issue ID
1378131
Regression
No
Prefab modifications aren't saved when "Auto Save" is enabled
Reproduction steps:
1. Open the user's attached "EditGridTest.zip" project
2. Open the "SampleScene" Scene
3. Open the "Test" Prefab Asset
4. Check the "Auto Save" tick-box at the top of the Scene view
5. Click the "Edit Grid" button in the Inspector window inside of "TestGrid (Script)" Component
6. Left-click on the Scene view window to draw line blocks
7. Exit the "Test" Prefab Asset
8. Observe the Scene view window
Expected result: All drawn blocs are saved
Actual result: The minority of drawn blocks are saved
Reproducible with: 2019.4.33f1, 2020.3.24f1, 2021.2.5f1, 2022.1.0a16
Notes:
- Unchecking the "Auto Save" tick-box and saving the prefab manually doesn't reproduce the issue
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Resolution Note:
In order to support drag-painting blocks you need to set the GUIUtility.hotcontrol property while painting (See https://docs.unity3d.com/ScriptReference/GUIUtility-hotControl.html).
The Prefab Mode checks if the hotcontrol is set and delays autosaving until it is released again.
Example for your editor script:
private void OnSceneGUI()
{
int controlID = GUIUtility.GetControlID(FocusType.Passive);
if (GUIUtility.hotControl == 0 && Event.current.type == EventType.MouseDown && Event.current.button == 0)
{
GUIUtility.hotControl = controlID;
Debug.Log("Grab hotcontrol");
}
if (GUIUtility.hotControl == controlID && Event.current.type == EventType.MouseUp && Event.current.button == 0)
{
GUIUtility.hotControl = 0;
Debug.Log("Release hotcontrol");
}
.....