private static void OriginSource_PropertyChanged(DependencyObject o, DependencyPropertyChangedEventArgs e)
{
CvsDisplay control = (CvsDisplay)o;
if (e.OldValue == null)
{
var img = e.NewValue as ImageSource;
control.ContentScale = control.ActualWidth > control.ActualHeight ? (control.ActualHeight - 20 > 0 ? (control.ActualHeight - 20) / img.Height : 0) : (control.ActualWidth - 20 > 0 ? (control.ActualWidth - 20) / img.Width : 0);
}
}
private static void Overlay_PropertyChanged(DependencyObject o, DependencyPropertyChangedEventArgs e)
{
CvsDisplay control = (CvsDisplay)o;
var img = new DrawingImage(e.NewValue as DrawingGroup);
if (img.CanFreeze)
{
img.Freeze();
control.Overlay_Image.Source = img;
}
}