public CroppingAdorner(UIElement adornedElement, Rect rcInit)
: base(adornedElement)
{
if (adornedElement == null) throw new ArgumentNullException("adornedElement");
if (rcInit == null || rcInit == Rect.Empty)
{
rcInit = new Rect(0, 0, adornedElement.RenderSize.Width, adornedElement.RenderSize.Height);
}
System.Diagnostics.Debug.WriteLine(String.Format("CroppingAdorner Width={0:N0}, Height={1:N0}", rcInit.Width, rcInit.Height));
_vc = new VisualCollection(this);
_prCropMask = new PuncturedRect();
_prCropMask.IsHitTestVisible = false;
_prCropMask.RectInterior = rcInit;
_prCropMask.Fill = Fill;
_vc.Add(_prCropMask);
_cnvThumbs = new Canvas();
_cnvThumbs.HorizontalAlignment = HorizontalAlignment.Stretch;
_cnvThumbs.VerticalAlignment = VerticalAlignment.Stretch;
_vc.Add(_cnvThumbs);
BuildCorner(ref _crtTop, Cursors.SizeNS);
BuildCorner(ref _crtBottom, Cursors.SizeNS);
BuildCorner(ref _crtLeft, Cursors.SizeWE);
BuildCorner(ref _crtRight, Cursors.SizeWE);
BuildCorner(ref _crtTopLeft, Cursors.SizeNWSE);
BuildCorner(ref _crtTopRight, Cursors.SizeNESW);
BuildCorner(ref _crtBottomLeft, Cursors.SizeNESW);
BuildCorner(ref _crtBottomRight, Cursors.SizeNWSE);
// Add handlers for Cropping.
_crtBottomLeft.DragDelta += new DragDeltaEventHandler(HandleBottomLeft);
_crtBottomRight.DragDelta += new DragDeltaEventHandler(HandleBottomRight);
_crtTopLeft.DragDelta += new DragDeltaEventHandler(HandleTopLeft);
_crtTopRight.DragDelta += new DragDeltaEventHandler(HandleTopRight);
_crtTop.DragDelta += new DragDeltaEventHandler(HandleTop);
_crtBottom.DragDelta += new DragDeltaEventHandler(HandleBottom);
_crtRight.DragDelta += new DragDeltaEventHandler(HandleRight);
_crtLeft.DragDelta += new DragDeltaEventHandler(HandleLeft);
//add eventhandler to drag and drop
adornedElement.MouseLeftButtonDown += new MouseButtonEventHandler(HandleMouseLeftButtonDown);
adornedElement.MouseMove += new MouseEventHandler(HandleMouseMove);
adornedElement.MouseLeftButtonUp += new MouseButtonEventHandler(HandleMouseLeftButtonUp);
// We have to keep the clipping interior withing the bounds of the adorned element
// so we have to track it's size to guarantee that...
FrameworkElement fel = (adornedElement as FrameworkElement);
if (fel != null)
{
fel.SizeChanged += new SizeChangedEventHandler(AdornedElement_SizeChanged);
}
}
private static object CoerceRectInterior(DependencyObject d, object value)
{
PuncturedRect pr = (PuncturedRect)d;
Rect rcExterior = pr.RectExterior;
Rect rcProposed = (Rect)value;
double left = Math.Max(rcProposed.Left, rcExterior.Left);
double top = Math.Max(rcProposed.Top, rcExterior.Top);
double width = Math.Max(Math.Min(rcProposed.Right, rcExterior.Right) - left, 0);
double height = Math.Max(Math.Min(rcProposed.Bottom, rcExterior.Bottom) - top, 0);
rcProposed = new Rect(left, top, width, height);
return(rcProposed);
}
public CroppingAdorner(UIElement adornedElement, Rect rcInit)
: base(adornedElement)
{
this.ClippingRectangle = rcInit;
_visuals = new VisualCollection(this);
_cropMask = new PuncturedRect();
_cropMask.SetBinding(PuncturedRect.RectInteriorProperty, new Binding("ClippingRectangle")
{
Source = this, Mode = BindingMode.TwoWay
});
_cropMask.IsHitTestVisible = false;
_cropMask.Fill = this.Fill;
_visuals.Add(_cropMask);
_thumbsCanvas = new Canvas();
_thumbsCanvas.HorizontalAlignment = HorizontalAlignment.Stretch;
_thumbsCanvas.VerticalAlignment = VerticalAlignment.Stretch;
_visuals.Add(_thumbsCanvas);
this.BuildCorner(ref _topThumb, Cursors.SizeNS);
this.BuildCorner(ref _bottomThumb, Cursors.SizeNS);
this.BuildCorner(ref _leftThumb, Cursors.SizeWE);
this.BuildCorner(ref _rightThumb, Cursors.SizeWE);
this.BuildCorner(ref _topLeftThumb, Cursors.SizeNWSE);
this.BuildCorner(ref _topRightThumb, Cursors.SizeNESW);
this.BuildCorner(ref _bottomLeftThumb, Cursors.SizeNESW);
this.BuildCorner(ref _bottomRightThumb, Cursors.SizeNWSE);
this.BuildDragThumb(ref _dragThumb);
// Add handlers for Cropping.
_bottomLeftThumb.DragDelta += new DragDeltaEventHandler(this.HandleBottomLeft);
_bottomRightThumb.DragDelta += new DragDeltaEventHandler(this.HandleBottomRight);
_topLeftThumb.DragDelta += new DragDeltaEventHandler(this.HandleTopLeft);
_topRightThumb.DragDelta += new DragDeltaEventHandler(this.HandleTopRight);
_topThumb.DragDelta += new DragDeltaEventHandler(this.HandleTop);
_bottomThumb.DragDelta += new DragDeltaEventHandler(this.HandleBottom);
_rightThumb.DragDelta += new DragDeltaEventHandler(this.HandleRight);
_leftThumb.DragDelta += new DragDeltaEventHandler(this.HandleLeft);
_dragThumb.DragDelta += new DragDeltaEventHandler(this.HandleDrag);
// We have to keep the clipping interior withing the bounds of the adorned element
// so we have to track it's size to guarantee that...
FrameworkElement element = adornedElement as FrameworkElement;
if (element != null)
{
element.SizeChanged += new SizeChangedEventHandler(this.AdornedElement_SizeChanged);
}
}
public CroppingAdorner(UIElement adornedElement, Rect rcInit)
: base(adornedElement)
{
_vc = new VisualCollection(this);
_prCropMask = new PuncturedRect();
_prCropMask.IsHitTestVisible = false;
_prCropMask.RectInterior = rcInit;
_prCropMask.Fill = Fill;
_vc.Add(_prCropMask);
_cnvThumbs = new Canvas();
_cnvThumbs.HorizontalAlignment = HorizontalAlignment.Stretch;
_cnvThumbs.VerticalAlignment = VerticalAlignment.Stretch;
_vc.Add(_cnvThumbs);
BuildCorner(ref _crtTop, Cursors.SizeNS);
BuildCorner(ref _crtBottom, Cursors.SizeNS);
BuildCorner(ref _crtLeft, Cursors.SizeWE);
BuildCorner(ref _crtRight, Cursors.SizeWE);
BuildCorner(ref _crtTopLeft, Cursors.SizeNWSE);
BuildCorner(ref _crtTopRight, Cursors.SizeNESW);
BuildCorner(ref _crtBottomLeft, Cursors.SizeNESW);
BuildCorner(ref _crtBottomRight, Cursors.SizeNWSE);
// Add handlers for Cropping.
_crtBottomLeft.DragDelta += new DragDeltaEventHandler(HandleBottomLeft);
_crtBottomRight.DragDelta += new DragDeltaEventHandler(HandleBottomRight);
_crtTopLeft.DragDelta += new DragDeltaEventHandler(HandleTopLeft);
_crtTopRight.DragDelta += new DragDeltaEventHandler(HandleTopRight);
_crtTop.DragDelta += new DragDeltaEventHandler(HandleTop);
_crtBottom.DragDelta += new DragDeltaEventHandler(HandleBottom);
_crtRight.DragDelta += new DragDeltaEventHandler(HandleRight);
_crtLeft.DragDelta += new DragDeltaEventHandler(HandleLeft);
// We have to keep the clipping interior withing the bounds of the adorned element
// so we have to track it's size to guarantee that...
FrameworkElement fel = adornedElement as FrameworkElement;
if (fel != null)
{
fel.SizeChanged += new SizeChangedEventHandler(AdornedElement_SizeChanged);
}
}
