/// <summary>
/// Draws the node's shape as the background.
/// </summary>
/// <param name="graphics">The graphics object used for drawing.</param>
/// <param name="nvd">The node view data of the node the subitem belongs to.</param>
/// <param name="brush">The brush to draw the node's shape.</param>
protected void DrawBackground(Graphics graphics, NodeViewData nvd, Brush brush)
{
if (brush != null)
{
nvd.DrawShapeBackground(graphics, nvd.BoundingBox, brush);
}
}
