// Initialize the ResizingAdorner.
public ResizeAdorner(Canvas adornedElement, PropDesigner vm, Rect bounds)
: base(adornedElement)
{
this.vm = vm;
_bounds = bounds;
_visualChildren = new VisualCollection(this);
// Call a helper method to initialize the Thumbs
// with a customized cursors.
BuildAdornerCorner(ref _topLeft, Cursors.SizeNWSE);
BuildAdornerCorner(ref _topRight, Cursors.SizeNESW);
BuildAdornerCorner(ref _bottomLeft, Cursors.SizeNESW);
BuildAdornerCorner(ref _bottomRight, Cursors.SizeNWSE);
BuildAdornerCorner(ref _middleTop, Cursors.SizeNS);
BuildAdornerCorner(ref _middleRight, Cursors.SizeWE);
BuildAdornerCorner(ref _middleBottom, Cursors.SizeNS);
BuildAdornerCorner(ref _middleLeft, Cursors.SizeWE);
BuildAdornerCorner(ref _centerDrag, Cursors.SizeAll);
Style s = (Style)vm.FindResource("RotateThumbStyle");
BuildAdornerCorner(ref _rotate, Cursors.Hand, s);
// Add handlers for resizing.
_bottomLeft.DragDelta += HandleBottomLeft;
_bottomRight.DragDelta += HandleBottomRight;
_topLeft.DragDelta += HandleTopLeft;
_topRight.DragDelta += HandleTopRight;
_middleTop.DragDelta += HandleMiddleTop;
_middleRight.DragDelta += HandleMiddleRight;
_middleBottom.DragDelta += HandleMiddleBottom;
_middleLeft.DragDelta += HandleMiddleLeft;
_centerDrag.DragDelta += HandleCenterDrag;
_centerDrag.DragStarted += _centerDrag_DragStarted;
_rotate.DragDelta += HandleRotate;
_rotationCenter = Center(Bounds);
_rotateTransform = new RotateTransform(_rotationAngle, _rotationCenter.X, _rotationCenter.Y);
_reverseRotateTransform = new RotateTransform(_rotationAngle, _rotationCenter.X, _rotationCenter.Y);
}
