public TimelineViewSelectionEventArgs(TimelineView view, float begin, float end, float lastBegin, float lastEnd)
     : base(view)
 {
     this.beginTime = begin;
     this.endTime = end;
     this.lastBeginTime = lastBegin;
     this.lastEndTime = lastEnd;
 }
 public TimelineViewCursorEventArgs(TimelineView view, float cursorUnits, float lastCursorUnits)
     : base(view)
 {
     this.cursorUnits = cursorUnits;
     this.lastCursorUnits = lastCursorUnits;
 }
 public TimelineViewEventArgs(TimelineView view)
 {
     this.view = view;
 }
 public TimelineViewPaintEventArgs(TimelineView view, Graphics graphics, Rectangle targetRect)
     : base(view)
 {
     this.graphics = graphics;
     this.targetRect = targetRect;
 }