public bool SnapValid(float position)
{
if (m_SnappedTo == null)
{
return(false);
}
return((TimelineSnappingMouseManipulator.k_SnapTimeComparer.Equals(StartTime, m_SnappedTo.StartTime) ||
TimelineSnappingMouseManipulator.k_SnapTimeComparer.Equals(EndTime, m_SnappedTo.EndTime) ||
TimelineSnappingMouseManipulator.k_SnapTimeComparer.Equals(StartTime, m_SnappedTo.EndTime) ||
TimelineSnappingMouseManipulator.k_SnapTimeComparer.Equals(EndTime, m_SnappedTo.StartTime)) &&
Mathf.Abs(position - m_SnappedTo.GetSnapPosition(position)) < TimelineSnappingMouseManipulator.k_SnapMoveDelta);
}
SnappingElement FindSnapTarget(float dragPosition, MouseDirection direction)
{
SnappingElement snapTarget = SnapTo(m_Target, dragPosition);
if (snapTarget != null)
{
float snapPosition = snapTarget.GetSnapPosition(dragPosition);
if (snapPosition < dragPosition && direction == MouseDirection.Decreasing)
{
return(snapTarget);
}
if (snapPosition > dragPosition && direction == MouseDirection.Increasing)
{
return(snapTarget);
}
}
return(null);
}
protected bool TryToSnap(float dragPosition, MouseDirection direction, float framerate, out float newTime,
bool snapToClipStart = true, bool snapToClipDuration = true, bool snapToPlayhead = true)
{
Timeline timeline = m_Target.Timeline;
if (SnappingEnabled)
{
m_Target.UnSnap();
SnappingElement snapTarget = FindSnapTarget(dragPosition, direction);
if (snapTarget != null)
{
newTime = timeline.WorldPositionToTime(snapTarget.GetSnapPosition(dragPosition));
m_Target.SnapTo(snapTarget);
if (timeline.TimelineUnits == TimelineViewMode.frames)
{
newTime = (float)TimelineUtility.RoundToFrame(newTime, framerate);
}
timeline.ShowSnap(newTime);
return(true);
}
float zeroPos = timeline.TimeToWorldPos(0f);
float duration = m_Target.Track.Clip.DurationInSeconds;
float endPos = timeline.TimeToWorldPos(duration);
if (snapToClipStart && Mathf.Abs(dragPosition - zeroPos) < k_SnapMoveDelta)
{
timeline.ShowSnap(0f);
newTime = 0f;
return(true);
}
if (snapToClipDuration && Mathf.Abs(dragPosition - endPos) < k_SnapMoveDelta)
{
newTime = duration;
timeline.ShowSnap(newTime);
return(true);
}
float activeTimePos = timeline.TimeToWorldPos(timeline.ActiveTime);
if (snapToPlayhead && Mathf.Abs(dragPosition - activeTimePos) < k_SnapMoveDelta)
{
newTime = timeline.ActiveTime;
timeline.ShowSnap(timeline.ActiveTime);
return(true);
}
}
newTime = timeline.WorldPositionToTime(dragPosition);
if (timeline.TimelineUnits == TimelineViewMode.frames)
{
newTime = (float)TimelineUtility.RoundToFrame(newTime, framerate);
}
m_Target.UnSnap();
timeline.HideSnap();
return(false);
}