''' <summary>
''' Tests the graphics objects on image viewer.
''' </summary>
''' <param name="viewer">The viewer.</param>
Public Shared Sub TestGraphicsObjects(viewer As Vintasoft.Imaging.UI.ImageViewer)
    ' objects location and size
    Dim objectBBox As New System.Drawing.RectangleF(40, 60, 80, 100)

    ' object fill brush
    Dim brush As System.Drawing.Brush = New System.Drawing.SolidBrush(System.Drawing.Color.FromArgb(128, System.Drawing.Color.White))

    ' create Rectangular Graphic Object
    Dim rect As New Vintasoft.Imaging.UI.VisualTools.GraphicObjects.RectangularGraphicObject(objectBBox, New System.Drawing.Pen(System.Drawing.Color.Red, 10), brush)
    ' use current image coordinate space for rectange
    rect.PointTransform = New Vintasoft.Imaging.UI.VisualTools.PixelsToImageViewerPointFTransform()

    ' create Elliptical Graphic Object
    Dim ellipse As New Vintasoft.Imaging.UI.VisualTools.GraphicObjects.EllipticalGraphicObject(objectBBox, New System.Drawing.Pen(System.Drawing.Color.Green, 10), brush)
    ' use image viewer coordinate space for ellipse
    ellipse.PointTransform = Nothing

    ' create GraphicObjectTool
    Dim graphicObjects As New Vintasoft.Imaging.UI.VisualTools.GraphicObjects.GraphicObjectTool()
    graphicObjects.GraphicObjectCollection.Add(rect)
    graphicObjects.GraphicObjectCollection.Add(ellipse)

    ' set GraphicObjectTool as current tool of ImageViewer
    viewer.VisualTool = graphicObjects
End Sub

/// <summary>
/// Tests the graphics objects on image viewer.
/// </summary>
/// <param name="viewer">The viewer.</param>
public static void TestGraphicsObjects(Vintasoft.Imaging.UI.ImageViewer viewer)
{
    // objects location and size
    System.Drawing.RectangleF objectBBox = new System.Drawing.RectangleF(40, 60, 80, 100);

    // object fill brush
    System.Drawing.Brush brush = new System.Drawing.SolidBrush(
        System.Drawing.Color.FromArgb(128, System.Drawing.Color.White));

    // create Rectangular Graphic Object
    Vintasoft.Imaging.UI.VisualTools.GraphicObjects.RectangularGraphicObject rect = 
        new Vintasoft.Imaging.UI.VisualTools.GraphicObjects.RectangularGraphicObject(
            objectBBox, 
            new System.Drawing.Pen(System.Drawing.Color.Red, 10), 
            brush);
    // use current image coordinate space for rectange
    rect.PointTransform = 
        new Vintasoft.Imaging.UI.VisualTools.PixelsToImageViewerPointFTransform();

    // create Elliptical Graphic Object
    Vintasoft.Imaging.UI.VisualTools.GraphicObjects.EllipticalGraphicObject ellipse = 
        new Vintasoft.Imaging.UI.VisualTools.GraphicObjects.EllipticalGraphicObject(
            objectBBox, 
            new System.Drawing.Pen(System.Drawing.Color.Green, 10), 
            brush);
    // use image viewer coordinate space for ellipse
    ellipse.PointTransform = null;

    // create GraphicObjectTool
    Vintasoft.Imaging.UI.VisualTools.GraphicObjects.GraphicObjectTool graphicObjects = 
        new Vintasoft.Imaging.UI.VisualTools.GraphicObjects.GraphicObjectTool();
    graphicObjects.GraphicObjectCollection.Add(rect);
    graphicObjects.GraphicObjectCollection.Add(ellipse);

    // set GraphicObjectTool as current tool of ImageViewer
    viewer.VisualTool = graphicObjects;
}