ImageViewerRubberBandInteractiveMode Class

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.Controls; 
 
public void ImageViewerRubberBandInteractiveModeExample() 
{ 
   // Set rubber band as the default interactive mode 
   ImageViewerRubberBandInteractiveMode rubberBandMode = new ImageViewerRubberBandInteractiveMode(); 
   // Customize it 
   rubberBandMode.BorderColor = Windows.UI.Color.FromArgb(255, 255, 0, 0); 
   rubberBandMode.BorderDashArray = 4; 
   rubberBandMode.BorderThickness = 2; 
   rubberBandMode.BorderDashOffset = 2; 
   // Hook to its RubberBandCompleted event 
   rubberBandMode.RubberBandCompleted += rubberBandMode_RubberBandCompleted; 
 
   _viewer.DefaultInteractiveMode = rubberBandMode; 
 
   _infoLabel.Text = "Draw a blue with yellow border rectangle on the image"; 
} 
 
// Called by the base class when the mode is stopped 
void rubberBandMode_RubberBandCompleted(object sender, ImageViewerRubberBandEventArgs e) 
{ 
   // Get the final rectangle 
   LeadRectD rect = LeadRectDHelper.FromLTRB(e.Point1.X, e.Point1.Y, e.Point2.X, e.Point2.Y); 
 
   // Get the visible rect of the _viewer 
   Rect imageControlRect = _viewer.ImageControlRectangle(true); 
   LeadRectD visibleRect = LeadRectDHelper.FromLTRB(imageControlRect.Left, imageControlRect.Top, imageControlRect.Right, imageControlRect.Bottom); 
 
   // Interset this rectangle with the visible area of the _viewer 
   rect = LeadRectDHelper.Intersect(rect, visibleRect); 
 
   // Make sure it has some width and height and not too small 
   if (rect.Width > 0 && rect.Height > 0) 
   { 
      // Get the viewer canvas 
      Canvas viewerCanvas = _viewer.InteractiveModeCanvas; 
 
      double x = rect.X; 
      double y = rect.Y; 
      double width = rect.Width; 
      double height = rect.Height; 
 
      // Add rectangle shape filled with Blue 
      Rectangle rectShape = new Rectangle 
      { 
         Width = rect.Width, 
         Height = rect.Height, 
         Fill = new SolidColorBrush(Windows.UI.Color.FromArgb(255, 0, 0, 255)), 
         StrokeThickness = 2 
      }; 
      Canvas.SetLeft(rectShape, x); 
      Canvas.SetTop(rectShape, y); 
      viewerCanvas.Children.Add(rectShape); 
 
      // Invalidate the _viewer (so it draws the back canvas into the foreground) 
      _viewer.Invalidate(); 
   } 
}