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Won't Fix

Votes

0

Found in

2019.4

2019.4.16f1

2020.3

2021.2

2022.1

2022.2

Issue ID

1390034

Regression

No

RegisterCallback<ChangeEvent<T>> doesn't output when CustomPropertyDrawer is used for the type and handed to PropertyField

UI Toolkit

-

How to reproduce:
1. Open the user's attached "UnityBugPropertyField" project
2. Open the "SampleScene" Scene
3. Select the "GameObject" GameObject in the Hierarchy
4. Change the value of the "Ingredient" or "Length 2" numeric fields value in the Inspector

Expected result: "Property value changed to: ..." message is output in the Console log after changing the "Ingredient" or "Length 2" numeric fields value
Actual result: No message is output

Reproducible with: 2019.4.36f1, 2020.3.30f1, 2021.2.14f1, 2022.2.0b11, 2022.2.0a7

  1. Resolution Note:

    This is a limitation of IMGUIContainer's backwards compatibility. When a property is edited by IMGUI code, no UIToolkit event is sent as IMGUI is unaware of the existence of these events.

    One can instead register to PropertyField.RegisterValueChangeCallback with SerializedPropertyChangeEvent to be notified when any type of value under a PropertyField has changed:
    https://docs.unity3d.com/2021.2/Documentation/ScriptReference/UIElements.PropertyField.RegisterValueChangeCallback.html

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