File size: 2,129 Bytes
18a519f | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 | using UnityEngine;
namespace UnityEditor.Timeline
{
/// <summary>
/// Scrolling mode during playback for the timeline window.
/// </summary>
public enum PlaybackScrollMode
{
/// <summary>
/// Timeline window doesn't change while the playhead is leaving the window.
/// </summary>
None,
/// <summary>
/// Timeline window pans its content when the playhead arrive at the right of the window (like a paging scrolling).
/// </summary>
Pan,
/// <summary>
/// Timeline window move the content as the playhead moves.
/// When the playhead reach the middle of the window, it stays there and the content scroll behind it.
/// </summary>
Smooth
}
static class PlaybackScroller
{
public static void AutoScroll(WindowState state)
{
if (Event.current.type != EventType.Layout)
return;
switch (state.autoScrollMode)
{
case PlaybackScrollMode.Pan:
DoPanScroll(state);
break;
case PlaybackScrollMode.Smooth:
DoSmoothScroll(state);
break;
}
}
static void DoSmoothScroll(WindowState state)
{
if (state.playing)
state.SetPlayHeadToMiddle();
state.UpdateLastFrameTime();
}
static void DoPanScroll(WindowState state)
{
if (!state.playing)
return;
var paddingDeltaTime = state.PixelDeltaToDeltaTime(WindowConstants.autoPanPaddingInPixels);
var showRange = state.timeAreaShownRange;
var rightBoundForPan = showRange.y - paddingDeltaTime;
if (state.editSequence.time > rightBoundForPan)
{
var leftBoundForPan = showRange.x + paddingDeltaTime;
var delta = rightBoundForPan - leftBoundForPan;
state.SetTimeAreaShownRange(showRange.x + delta, showRange.y + delta);
}
}
}
}
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