Smrf.NodeXL.Visualization.Wpf.GraphDrawer.DrawBackground C# (CSharp) Method

    DrawBackground
    (
        IGraph oGraph,
        GraphDrawingContext oGraphDrawingContext
    )
    {
        Debug.Assert(oGraph != null);
        Debug.Assert(oGraphDrawingContext != null);
        AssertValid();

        // Draw the background color, followed by the background image if one
        // was specified.

        DrawingVisual oBackgroundDrawingVisual = new DrawingVisual();

        using ( DrawingContext oDrawingContext =
            oBackgroundDrawingVisual.RenderOpen() )
        {
            oDrawingContext.DrawRectangle(
                CreateFrozenSolidColorBrush(m_oBackColor), null,
                oGraphDrawingContext.GraphRectangle);

            if (m_oBackgroundImage != null)
            {
                oDrawingContext.DrawImage( m_oBackgroundImage,
                    new Rect( new Size(m_oBackgroundImage.Width,
                        m_oBackgroundImage.Height) ) );
            }
        }

        m_oVisualCollection.Add(oBackgroundDrawingVisual);
    }