public CroppingAdorner(UIElement adornedElement, Rect rcInit)
: base(adornedElement)
{
_cropMask = new PuncturedRect
{
IsHitTestVisible = false,
Interior = rcInit,
Fill = Fill
};
_thumbCanvas = new Canvas
{
HorizontalAlignment = HorizontalAlignment.Stretch,
VerticalAlignment = VerticalAlignment.Stretch
};
_visualCollection = new VisualCollection(this)
{
_cropMask, _thumbCanvas
};
BuildCorner(ref _thumbTop, Cursors.SizeNS);
BuildCorner(ref _thumbBottom, Cursors.SizeNS);
BuildCorner(ref _thumbLeft, Cursors.SizeWE);
BuildCorner(ref _thumbRight, Cursors.SizeWE);
BuildCorner(ref _thumbTopLeft, Cursors.SizeNWSE);
BuildCorner(ref _thumbTopRight, Cursors.SizeNESW);
BuildCorner(ref _thumbBottomLeft, Cursors.SizeNESW);
BuildCorner(ref _thumbBottomRight, Cursors.SizeNWSE);
BuildCenter(ref _thumbCenter);
//Cropping handlers.
_thumbBottomLeft.DragDelta += HandleBottomLeft;
_thumbBottomRight.DragDelta += HandleBottomRight;
_thumbTopLeft.DragDelta += HandleTopLeft;
_thumbTopRight.DragDelta += HandleTopRight;
_thumbTop.DragDelta += HandleTop;
_thumbBottom.DragDelta += HandleBottom;
_thumbRight.DragDelta += HandleRight;
_thumbLeft.DragDelta += HandleLeft;
_thumbCenter.DragDelta += HandleCenter;
//Clipping interior should be withing the bounds of the adorned element.
var element = adornedElement as FrameworkElement;
if (element != null)
{
element.SizeChanged += AdornedElement_SizeChanged;
}
}
private static object CoerceRectInterior(DependencyObject d, object value)
{
PuncturedRect pr = (PuncturedRect)d;
Rect rcExterior = pr.Exterior;
Rect rcProposed = (Rect)value;
double left = Math.Max(rcProposed.Left, rcExterior.Left);
double top = Math.Max(rcProposed.Top, rcExterior.Top);
double width = Math.Min(rcProposed.Right, rcExterior.Right) - left;
double height = Math.Min(rcProposed.Bottom, rcExterior.Bottom) - top;
rcProposed = new Rect(left, top, width, height);
return(rcProposed);
}
public CroppingAdorner(UIElement adornedElement, Rect rcInit)
: base(adornedElement)
{
_cropMask = new PuncturedRect
{
IsHitTestVisible = false,
Interior = rcInit,
Fill = Fill
};
_thumbCanvas = new Canvas
{
HorizontalAlignment = HorizontalAlignment.Stretch,
VerticalAlignment = VerticalAlignment.Stretch
};
_visualCollection = new VisualCollection(this)
{ _cropMask, _thumbCanvas};
BuildCorner(ref _thumbTop, Cursors.SizeNS);
BuildCorner(ref _thumbBottom, Cursors.SizeNS);
BuildCorner(ref _thumbLeft, Cursors.SizeWE);
BuildCorner(ref _thumbRight, Cursors.SizeWE);
BuildCorner(ref _thumbTopLeft, Cursors.SizeNWSE);
BuildCorner(ref _thumbTopRight, Cursors.SizeNESW);
BuildCorner(ref _thumbBottomLeft, Cursors.SizeNESW);
BuildCorner(ref _thumbBottomRight, Cursors.SizeNWSE);
//Cropping handlers.
_thumbBottomLeft.DragDelta += HandleBottomLeft;
_thumbBottomRight.DragDelta += HandleBottomRight;
_thumbTopLeft.DragDelta += HandleTopLeft;
_thumbTopRight.DragDelta += HandleTopRight;
_thumbTop.DragDelta += HandleTop;
_thumbBottom.DragDelta += HandleBottom;
_thumbRight.DragDelta += HandleRight;
_thumbLeft.DragDelta += HandleLeft;
//Clipping interior should be withing the bounds of the adorned element.
FrameworkElement element = adornedElement as FrameworkElement;
if (element != null)
{
element.SizeChanged += AdornedElement_SizeChanged;
}
}