Navigation:  I Want To... > Imaging > Add a vector graphic

Use Case

Relevant Architecture

Relevant Types

Sample Code

using System.Drawing;

using ClearCanvas.Common;

using ClearCanvas.Desktop;

using ClearCanvas.Desktop.Actions;

using ClearCanvas.ImageViewer;

using ClearCanvas.ImageViewer.BaseTools;

using ClearCanvas.ImageViewer.Graphics;

 

// ... (other using namespace statements here)

 

namespace MyPlugin.Imaging

{

   [ButtonAction("apply", "global-toolbars/ToolbarStandard/AddVectorGraphicTool", "Apply")]

   [IconSet("apply", IconScheme.Colour, "Icons.MyToolSmall.png", "Icons.MyToolMedium.png", "Icons.MyToolLarge.png")]

   // ... (other action attributes here)

   [ExtensionOf(typeof (ImageViewerToolExtensionPoint))]

   public class AddVectorGraphicTool : ImageViewerTool

   {

      public void Apply()

      {

         if (this.SelectedOverlayGraphicsProvider == null)

            return;

 

         // Create a composite graphic

         CompositeGraphic composite = new CompositeGraphic();

 

         // Create a rectangle

         RectanglePrimitive rect = new RectanglePrimitive();

         rect.TopLeft = new PointF(5, 10);

         rect.BottomRight = new PointF(20, 25);

 

         // Create a line

         LinePrimitive line = new LinePrimitive();

         line.Point1 = new PointF(5, 25);

         line.Point2 = new PointF(20, 10);

 

         // Add the rectangle and line to the composite

         composite.Graphics.Add(rect);

         composite.Graphics.Add(line);

 

         // Add the composite to the selected presentation image's scene graph      

         this.SelectedOverlayGraphicsProvider.OverlayGraphics.Add(composite);

 

         // Now render

         this.SelectedPresentationImage.Draw();

      }

   }

}

Remarks

Adding a static (i.e., non-interactive) vector overlay can be achieved by simply creating the appropriate VectorGraphics and adding them to the scene graph.  If you want to control, say, the visibility of a group of VectorGraphics, add them to a CompositeGraphic, then add the CompositeGraphic to the scene graph.  In the example above, a rectangle and line are added to a CompositeGraphic, and thus can be manipulated as a group.

Examples in Code Base