private void AddCropToElement(FrameworkElement element)
{
if (_frameworkElement != null)
{
RemoveCropFromCur();
}
Rect rect;
if (_isRectSizeSet)
{
rect = new Rect(
_rectX,
_rectY,
_rectWidth,
_rectHeight);
}
else
{
rect = AutoFit(element);
}
var layer = AdornerLayer.GetAdornerLayer(element);
_croppingAdorner = new CroppingAdorner(element, rect);
_croppingAdorner.SlideWidth = this.GetCurrentPresentation().SlideWidth;
_croppingAdorner.SlideHeight = this.GetCurrentPresentation().SlideHeight;
_croppingAdorner.CropChanged += (sender, args) =>
{
var croppingRect = _croppingAdorner.ClippingRectangle;
if (croppingRect.Width*croppingRect.Height < 1)
{
SaveCropButton.IsEnabled = false;
}
else
{
SaveCropButton.IsEnabled = true;
}
};
Rect = rect;
layer.Add(_croppingAdorner);
_frameworkElement = element;
SetClipColorGrey();
}