internal void SetVisualLines(ICollection <VisualLine> visualLines)
{
foreach (VisualLineDrawingVisual v in visuals)
{
if (v.VisualLine.IsDisposed)
{
RemoveVisualChild(v);
}
}
visuals.Clear();
foreach (VisualLine newLine in visualLines)
{
VisualLineDrawingVisual v = newLine.Render();
if (!v.IsAdded)
{
AddVisualChild(v);
v.IsAdded = true;
}
visuals.Add(v);
}
InvalidateArrange();
}