/// <summary>
/// Removes the rectCanvasObject.
/// </summary>
private void RemoveRectangleVisualization()
{
if (rectCanvasObject != null)
{
rectCanvasObject.Remove();
rectCanvasObject = null;
}
rectangle = null;
}
/// <summary>
/// Initializes the handles, the reshapeHandler and enables the handleInputMode.
/// </summary>
private void ShowHandles()
{
var graphControl = InputModeContext.CanvasControl as GraphControl;
// collect all selected nodes as well as their descendents
var reshapeNodes = CollectReshapeNodes(graphControl.Graph, graphControl.Selection);
// create a mutable rectangle, that is updated by the ReshapeHandler
rectangle = new EncompassingRectangle(reshapeNodes, margins);
// and visualize it
var rectangleIndicator = new RectangleIndicatorInstaller(rectangle, RectangleIndicatorInstaller.SelectionTemplateKey);
rectCanvasObject = rectangleIndicator.AddCanvasObject(graphControl.CanvasContext, graphControl.InputModeGroup, rectangle);
rectCanvasObject.ToBack();
// Create a reshape handler factory depending on the current mode
Func <ReshapeHandlerBase> reshapeHandlerFactory;
if ((Mode == ResizeMode.Scale))
{
reshapeHandlerFactory = () => new ScalingReshapeHandler(rectangle);
}
else
{
reshapeHandlerFactory = () => new ResizingReshapeHandler(rectangle);
}
// create and add the handles to our HandleInputMode
handleInputMode.Handles = new DefaultObservableCollection <IHandle> {
CreateHandle(HandlePositions.North, reshapeHandlerFactory),
CreateHandle(HandlePositions.NorthWest, reshapeHandlerFactory),
CreateHandle(HandlePositions.West, reshapeHandlerFactory),
CreateHandle(HandlePositions.SouthWest, reshapeHandlerFactory),
CreateHandle(HandlePositions.South, reshapeHandlerFactory),
CreateHandle(HandlePositions.SouthEast, reshapeHandlerFactory),
CreateHandle(HandlePositions.East, reshapeHandlerFactory),
CreateHandle(HandlePositions.NorthEast, reshapeHandlerFactory)
};
handleInputMode.Enabled = true;
}
protected ReshapeHandlerBase(EncompassingRectangle rectangle)
{
this.rectangle = rectangle;
}
public ResizingReshapeHandler(EncompassingRectangle rectangle) : base(rectangle)
{
}