/// <summary>
/// Handle mouse down.
/// Start moving, resizing or group selection.
/// </summary>
public override void OnMouseDown(DrawingCanvas drawingCanvas, MouseButtonEventArgs e)
{
drawingCanvas.ClearSelection();
var point = e.GetPosition(drawingCanvas);
// Group selection. Create selection rectangle.
var r = new GraphicsAnimatedSelectionRectangle(
point.X, point.Y,
point.X + 1, point.Y + 1,
drawingCanvas.ActualScale);
r.Clip = new RectangleGeometry(new Rect(0, 0, drawingCanvas.ActualWidth, drawingCanvas.ActualHeight));
drawingCanvas.GraphicsList.Add(r);
drawingCanvas.CurrentSelection = (GraphicsRectangleBase)r;
drawingCanvas.CaptureMouse();
}
/// <summary>
/// Handle mouse up.
/// Return to normal state.
/// </summary>
public override void OnMouseUp(DrawingCanvas drawingCanvas, MouseButtonEventArgs e)
{
if (!drawingCanvas.IsMouseCaptured)
{
return;
}
var r = (GraphicsAnimatedSelectionRectangle)drawingCanvas[drawingCanvas.Count - 1];
r.Normalize();
Rect rect = r.Rectangle;
// This means no selection
if (r.Rectangle.Height <= 2 || r.Rectangle.Width <= 2)
{
drawingCanvas.GraphicsList.Remove(r);
drawingCanvas.ClearSelection();
}
drawingCanvas.ReleaseMouseCapture();
drawingCanvas.Cursor = HelperFunctions.DefaultCursor;
}
