private void btnMoveRight_Loaded(object sender, RoutedEventArgs e)
{
//take screenshot
Grid grd = new Grid();
grd.Background = (ImageBrush)this.FindResource("HeaderBrush");
int height = 100;
grd.Height = height;
grd.Width = tabsGrid.ActualWidth;
tabsGrid.Children.Add(grd);
grd.Measure(new Size(tabsGrid.ActualWidth, height));
Size size = grd.DesiredSize;
grd.Arrange(new Rect(new Point(0, 0), size));
byte[] img = TextureUtil.TakeScreenShot(tabsGrid, (int)tabsGrid.ActualWidth, (int)tabsGrid.ActualHeight);
//crop image
Point p = btnMoveRight.TranslatePoint(new Point(0, 0), mainGrid);
img = TextureUtil.CropImageFile(img, 80, height - 2, (int)p.X, 0);
//create brush
BitmapImage bmImage = new BitmapImage();
bmImage.BeginInit();
bmImage.StreamSource = new MemoryStream(img);
bmImage.CreateOptions = BitmapCreateOptions.None;
bmImage.CacheOption = BitmapCacheOption.Default;
bmImage.EndInit();
btnMoveRight.Background = new ImageBrush(bmImage);
tabsGrid.Children.Remove(grd);
}
