private void Canvas_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
var handle = e.Source as TrackDragHandle;
if (handle != null)
{
this.trackBeingMoved = handle.Parent as TrackElement;
if (this.trackBeingMoved != null)
{
MoveTracks(this.trackBeingMoved, true);
this.trackBeingMovedStartPoint = e.GetPosition(null);
this.trackBeingMovedOrigin = new Point(Canvas.GetLeft(this.trackBeingMoved), Canvas.GetTop(this.trackBeingMoved));
Canvas.SetLeft(this.trackBeingMoved, 20);
Canvas.SetZIndex(this.trackBeingMoved, 20);
// Create insertion point
this.insertionPointCanvas = new InsertionPointCanvas();
this.insertionPointCanvas.Width = this.canvas.ActualWidth;
Canvas.SetLeft(this.insertionPointCanvas, 0);
Canvas.SetTop(this.insertionPointCanvas, Canvas.GetTop(this.trackBeingMoved));
Canvas.SetZIndex(this.insertionPointCanvas, 10);
this.canvas.Children.Add(this.insertionPointCanvas);
}
}
}
private void Canvas_PreviewMouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
if (this.trackBeingMoved != null)
{
Canvas.SetTop(this.trackBeingMoved, Canvas.GetTop(this.insertionPointCanvas));
Canvas.SetLeft(this.trackBeingMoved, 0);
Canvas.SetZIndex(this.trackBeingMoved, 0);
MoveTracks(this.trackBeingMoved, false);
this.trackBeingMoved = null;
}
if (this.insertionPointCanvas != null)
{
this.canvas.Children.Remove(this.insertionPointCanvas);
this.insertionPointCanvas = null;
}
}