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Question Disable Timeline editor window "Preview" from code

Discussion in 'Timeline' started by AverageProg, Sep 14, 2022.

  1. AverageProg


    Jun 25, 2015
    I am building a custom animation timeline and I am giving the opportunity to set the begin and end values
    of the animation directly from a ClipAction, the problem is that the preview is always on and I need to take the driven component value without it being affected by the preview.
    been looking around for a while now, is there any solution to this?
  2. cspid


    Apr 25, 2014
  3. Yuchen_Chang


    Apr 24, 2020
    I've checked the APIs, but seems that there is no public API for this. If you really want, there are internal features/classes that can do this.
    According to TimelineWindow_HeaderGui.cs, preview button is actually doing this:
    Code (CSharp):
    1.             var enabled = state.previewMode;
    2.             enabled = GUILayout.Toggle(enabled, DirectorStyles.previewContent, EditorStyles.toolbarButton);
    3.             if (EditorGUI.EndChangeCheck())
    4.             {
    5.                 // turn off auto play as well, so it doesn't auto reenable
    6.                 if (!enabled)
    7.                 {
    8.                     state.SetPlaying(false);
    9.                     state.recording = false;
    10.                 }
    12.                 state.previewMode = enabled;
    14.                 // if we are successfully enabled, rebuild the graph so initial states work correctly
    15.                 // Note: testing both values because previewMode setter can "fail"
    16.                 if (enabled && state.previewMode)
    17.                     state.rebuildGraph = true;
    18.             }
    (=> when turned off, stop playing; when turned on, rebuild the graph)
    the "state" refers to WindowState, which you can retrieve it by
    . However, it is an internal property, so you may need reflection, or use asmref to expose new public APIs to stop/start preview. (asmref allows you to add new script to packages)
    fxlange likes this.