public RubberbandAdorner(DesignerCanvas designerCanvas, Point?dragStartPoint)
: base(designerCanvas)
{
this.designerCanvas = designerCanvas;
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);
}
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
if (this.ScrollViewer == null)
{
return;
}
this.designerCanvas = this.ScrollViewer.Content as DesignerCanvas;
if (this.designerCanvas == null)
{
throw new Exception("DesignerCanvas must not be null!");
}
this.zoomThumb = Template.FindName("PART_ZoomThumb", this) as Thumb;
if (this.zoomThumb == null)
{
throw new Exception("PART_ZoomThumb template is missing!");
}
this.zoomCanvas = Template.FindName("PART_ZoomCanvas", this) as Canvas;
if (this.zoomCanvas == null)
{
throw new Exception("PART_ZoomCanvas template is missing!");
}
this.zoomSlider = Template.FindName("PART_ZoomSlider", this) as Slider;
if (this.zoomSlider == null)
{
throw new Exception("PART_ZoomSlider template is missing!");
}
this.designerCanvas.LayoutUpdated += new EventHandler(this.DesignerCanvas_LayoutUpdated);
this.zoomThumb.DragDelta += new DragDeltaEventHandler(this.Thumb_DragDelta);
this.zoomSlider.ValueChanged += new RoutedPropertyChangedEventHandler <double>(this.ZoomSlider_ValueChanged);
this.scaleTransform = new ScaleTransform();
this.designerCanvas.LayoutTransform = this.scaleTransform;
}
protected override void OnPreviewMouseDown(MouseButtonEventArgs e)
{
base.OnPreviewMouseDown(e);
DesignerCanvas designer = VisualTreeHelper.GetParent(this) as DesignerCanvas;
if (designer != null)
{
if ((Keyboard.Modifiers & (ModifierKeys.Shift | ModifierKeys.Control)) != ModifierKeys.None)
{
this.IsSelected = !this.IsSelected;
}
else
{
if (!this.IsSelected)
{
designer.DeselectAll();
this.IsSelected = true;
}
}
}
e.Handled = false;
}
protected override void OnDrop(DragEventArgs e)
{
base.OnDrop(e);
string xamlString = e.Data.GetData("DESIGNER_ITEM") as string;
if (!String.IsNullOrEmpty(xamlString))
{
DesignerItem newItem = null;
FrameworkElement content = XamlReader.Load(XmlReader.Create(new StringReader(xamlString))) as FrameworkElement;
if (content != null)
{
newItem = new DesignerItem();
newItem.Content = content;
Point position = e.GetPosition(this);
if (content.MinHeight != 0 && content.MinWidth != 0)
{
newItem.Width = content.MinWidth * 2;;
newItem.Height = content.MinHeight * 2;
}
else
{
newItem.Width = 65;
newItem.Height = 65;
}
DesignerCanvas.SetLeft(newItem, Math.Max(0, position.X - newItem.Width / 2));
DesignerCanvas.SetTop(newItem, Math.Max(0, position.Y - newItem.Height / 2));
this.Children.Add(newItem);
this.DeselectAll();
newItem.IsSelected = true;
}
e.Handled = true;
}
}