private void ResizeThumb_DragStarted(object sender, DragStartedEventArgs e)
{
this.element = DataContext as BaseObject;
if (this.element != null)
{
this.canvasWorkspace = VisualTreeHelper.GetParent(this.element) as CanvasWorkspace;
}
}
public RubberbandAdorner(CanvasWorkspace canvasWorkspace, Point?dragStartPoint)
: base(canvasWorkspace)
{
this.canvasWorkspace = canvasWorkspace;
this.startPoint = dragStartPoint;
this.adornerCanvas = new Canvas();
this.adornerCanvas.Background = Brushes.Transparent;
this.visuals = new VisualCollection(this);
this.visuals.Add(this.adornerCanvas);
this.rubberband = new Rectangle();
this.rubberband.Stroke = Brushes.Navy;
this.rubberband.StrokeThickness = 1;
this.rubberband.StrokeDashArray = new DoubleCollection(new double[] { 2 });
this.adornerCanvas.Children.Add(this.rubberband);
}
protected override void OnPreviewMouseDown(MouseButtonEventArgs e)
{
base.OnPreviewMouseDown(e);
CanvasWorkspace canvasWorkspace = VisualTreeHelper.GetParent(this) as CanvasWorkspace;
if (canvasWorkspace != null)
{
if ((Keyboard.Modifiers & (ModifierKeys.Shift | ModifierKeys.Control)) != ModifierKeys.None)
{
this.IsSelected = !this.IsSelected;
}
else
{
if (!this.IsSelected)
{
canvasWorkspace.DeselectAll();
this.IsSelected = true;
}
}
}
e.Handled = false;
}