private void SetupImagePreview()
{
var group = new TransformGroup();
var xform = new ScaleTransform();
//xform.ScaleY = -1;
group.Children.Add(xform);
var tt = new TranslateTransform();
group.Children.Add(tt);
//TranslateTransform zoomCenter = new TranslateTransform();
//group.Children.Add(zoomCenter);
ImagePreview.SetCurrentValue(RenderTransformProperty, group);
ImagePreviewCanvas.PreviewMouseWheel += ImagePreview_MouseWheel;
ImagePreviewCanvas.MouseDown += ImagePreview_MouseLeftButtonDown;
ImagePreviewCanvas.MouseUp += ImagePreview_MouseLeftButtonUp;
ImagePreviewCanvas.MouseMove += ImagePreview_MouseMove;
ImageDropZone.DragEnter += ImageDropZone_DragEnter;
ImageDropZone.DragLeave += ImageDropZone_DragLeave;
ImageDropZone.Drop += ImageDropZone_Drop;
_imageScale = new ScaleTransform();
//_imageScale.SetCurrentValue(ScaleTransform.ScaleYProperty, (double)-1);
ActualImage.SetCurrentValue(RenderTransformProperty, _imageScale);
}