Smrf.NodeXL.Visualization.Wpf.DraggedMarquee.CreateVisual C# (CSharp) Method

    CreateVisual
    (
        Point currentMouseLocation,
        Color backgroundContrastColor
    )
    {
        Debug.Assert(m_bDragIsInProgress);
        AssertValid();

        // Limit the drag to the graph margins.

        currentMouseLocation =
            ForcePointToBeWithinMargins(currentMouseLocation);

        m_oMarqueeRectangle = CreateMarqueeRectangle(currentMouseLocation);

        DrawingVisual oDrawingVisual = new DrawingVisual();

        SolidColorBrush oFillBrush = new SolidColorBrush(Color.FromArgb(
            MarqueeFillAlpha,
            backgroundContrastColor.R,
            backgroundContrastColor.G,
            backgroundContrastColor.B
            ) );

        SolidColorBrush oOutlineBrush = new SolidColorBrush(Color.FromArgb(
            MarqueeOutlineAlpha,
            backgroundContrastColor.R,
            backgroundContrastColor.G,
            backgroundContrastColor.B
            ) );

        Pen oOutlinePen = new Pen(oOutlineBrush, 1);

        WpfGraphicsUtil.FreezeIfFreezable(oFillBrush);
        WpfGraphicsUtil.FreezeIfFreezable(oOutlineBrush);
        WpfGraphicsUtil.FreezeIfFreezable(oOutlinePen);

        using ( DrawingContext oDrawingContext = oDrawingVisual.RenderOpen() )
        {
            oDrawingContext.DrawRectangle(oFillBrush, oOutlinePen,
                m_oMarqueeRectangle);
        }

        m_oVisual = oDrawingVisual;

        return (m_oVisual);
    }