//*************************************************************************
// Method: RetrieveVertexFromDrawingVisual()
//
/// <summary>
/// Retrieves a vertex from the DrawingVisual with which the vertex was
/// drawn.
/// </summary>
///
/// <param name="oDrawingVisual">
/// The DrawingVisual to retrieve a vertex from.
/// </param>
///
/// <returns>
/// The vertex that was drawn with <paramref name="oDrawingVisual" />.
/// </returns>
///
/// <remarks>
/// This method retrieves the vertex that was saved on a DrawingVisual by
/// <see cref="SaveVertexOnDrawingVisual" />.
/// </remarks>
//*************************************************************************
protected IVertex RetrieveVertexFromDrawingVisual(
DrawingVisual oDrawingVisual
)
{
Debug.Assert(oDrawingVisual != null);
AssertValid();
Object oVertexAsObject =
oDrawingVisual.GetValue(FrameworkElement.TagProperty);
Debug.Assert(oVertexAsObject is IVertex);
return ( (IVertex)oVertexAsObject );
}
