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Question Width is 0 after setting DisplayStyle to Flex.

Discussion in 'UI Toolkit' started by CoryMaklin, Sep 23, 2021.

  1. CoryMaklin

    CoryMaklin

    Joined:
    Oct 10, 2020
    Posts:
    29
    I have a "ghost" element that I'm using to simulate dragging an item. On the mouse down event, I want to center the element at the mouse position. Therefore, I do the following:

    Code (CSharp):
    1. m_GhostElement.style.display = DisplayStyle.Flex;
    2. m_GhostElement.style.left = evt.mousePosition.x - m_GhostElement.layout.width / 2;
    However, the width is 0 at that point of the code. Is there something I'm missing? Do I have to wait until the end of the frame for the display style change to take effect?

    The reason I say that, is the logic works in the subsequent mouse move event callback.
     
    Last edited: Sep 23, 2021
    CoryMaklin, Sep 23, 2021
    #1

  2. antoine-unity

    antoine-unity

    Unity Technologies

    Joined:
    Sep 10, 2015
    Posts:
    733
    Yes, this change doesn't happen immediately.

    You could use the visibility=hidden/visible style instead which doesn't change the size of the element.
     
    antoine-unity, Sep 23, 2021
    #2

  3. CoryMaklin

    CoryMaklin

    Joined:
    Oct 10, 2020
    Posts:
    29
    Gotcha. Is there a way of setting the visibility to hidden and ignoring events?
     
    CoryMaklin, Sep 25, 2021
    #3