protected TimelineSnappingMouseManipulator(SnappingElement target)
{
m_Target = target;
activators.Add(new ManipulatorActivationFilter {
button = MouseButton.LeftMouse
});
activators.Add(new ManipulatorActivationFilter {
button = MouseButton.LeftMouse, modifiers = Utility.GetMultiSelectModifier()
});
}
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);
}
public void UnSnap()
{
m_SnappedTo = null;
}
public void SnapTo(SnappingElement target)
{
m_SnappedTo = target;
}
