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Resolved How to add Callbacks for VisualElement style parameters?

Discussion in 'UI Toolkit' started by skelitheprogrammer, Feb 13, 2023.

  1. skelitheprogrammer

    skelitheprogrammer

    Joined:
    Sep 20, 2019
    Posts:
    14
    Is there any way to register callbacks for style parameters such as Display; Opacity for basic VisualElement?

    something like element.RegisterCallback<ChangeEvent<DisplayStyle>>(Callback)

    Can't understand is there a way or maybe I'm doing something wrong
     
    skelitheprogrammer, Feb 13, 2023
    #1

  2. martinpa_unity

    martinpa_unity

    Unity Technologies

    Joined:
    Oct 18, 2017
    Posts:
    370
    Hi @skelitheprogrammer!
    There are no events currently when the inline or resolved styles change. You would need to manually track changes for the time being.
     
    martinpa_unity, Feb 14, 2023
    #2

  3. skelitheprogrammer

    skelitheprogrammer

    Joined:
    Sep 20, 2019
    Posts:
    14
    Hello, thanks for the answer! Is it possible to do with the UI Toolkit C# API or I need to create a workaround?
     
    skelitheprogrammer, Feb 14, 2023
    #3

  4. martinpa_unity

    martinpa_unity

    Unity Technologies

    Joined:
    Oct 18, 2017
    Posts:
    370
    If you need to track changes to specific properties, such as the display, you would need to cache it somewhere and then compare it, there is nothing publicly available at the moment to track changes on style properties. You can cache them from 
    element.resolvedStyle
    .
     
    martinpa_unity, Feb 14, 2023
    #4

  5. skelitheprogrammer

    skelitheprogrammer

    Joined:
    Sep 20, 2019
    Posts:
    14
    Thank you for the anwser!
     
    skelitheprogrammer, Feb 15, 2023
    #5