private void AddCropToElement(FrameworkElement fel)
{
if (_felCur != null)
{
return;
}
var rcInterior = new Rect(
0,
0,
fel.ActualWidth,
fel.ActualHeight);
var adornerLayer = AdornerLayer.GetAdornerLayer(fel);
_clp = new CroppingAdorner(fel, rcInterior);
_felCur = fel;
var color = Colors.Black;
color.A = 180;
_clp.Fill = new SolidColorBrush(color);
adornerLayer.Add(_clp);
adornerLayer.UpdateLayout();
var dx = 1d / _clp.ClippingRectangle.Width * _imageWidth;
var dy = 1d / _clp.ClippingRectangle.Height * _imageHeight;
_clp.SetClippingRectangle(new Rect(
Configuration.Configuration.Instance.Settings.ClippingRectangle.X / dx,
Configuration.Configuration.Instance.Settings.ClippingRectangle.Y / dy,
Configuration.Configuration.Instance.Settings.ClippingRectangle.Width / dx,
Configuration.Configuration.Instance.Settings.ClippingRectangle.Height / dy
));
UpdateClippingRectangle();
_clp.CropChanged += (sender, args) =>
{
UpdateClippingRectangle();
};
Image.SizeChanged += ImageSizeChanged;
}