Delegate registered through ListView.RegisterCallback<ClickEvent> method gets passed an incorrect target

Unity: UI Toolkit Framework

As Designed

2023.1.X

2022.3.X

2021.3.X

ListView is a composite root, which makes the event set its target to it before trggering its callbacks. The composite root mechanisms are still internal in UI Toolkit so there is no way right now to go around this ambiguity, unfortunately. This is changed in 2023.2 and beyond.

Reproduction steps:
1. Open the "IN-53068.zip" project
2. Open "Assets/Scenes/SampleScene"
3. Enter Play mode
4. Press on the "hello0" Button and observe the Console

Expected results: "target: Button" is printed to the Console
Actual results: "target: ListView" is printed to the Console

Reproducible with: 2021.3.30f1, 2022.3.9f1, 2023.1.12f1, 2023.2.0a5
Not reproducible with: 2023.2.0b8, 2023.3.0a4
Fixed in: 2023.2.0a6

Reproducible on: macOS 13.4.1 (M1, Intel)
Not reproducible on: No other environment tested

Note: Reproducible in Standalone Player

Delegate registered through ListView.RegisterCallback<ClickEvent> method gets passed an incorrect target

Unity: UI Toolkit Framework

As Designed

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Have a workaround or additional info about this issue?

Delegate registered through ListView.RegisterCallback<ClickEvent> method gets passed an incorrect target

Unity: UI Toolkit Framework

Statuses

As Designed

Resolution Notes

2023.1.XAs DesignedListView is a composite root, which makes the event set its target to it before trggering its callbacks. The composite root mechanisms are still internal in UI Toolkit so there is no way right now to go around this ambiguity, unfortunately. This is changed in 2023.2 and beyond.

Description

Prioritise and Follow this issue

Have a workaround or additional info about this issue?