void DisplayTree_DisplayTreeChanged(object sender, TikzDisplayTree.DisplayTreeChangedEventArgs e)
{
// This method is called when the Displaytree changes, i.e., when a new OverlayShapeVM is created.
// Add a view to display the OverlayShapeVM
if (e.Type == TikzDisplayTree.DisplayTreeChangedType.Insert)
{
foreach (var os in e.AffectedItems)
{
if (os is OverlayScope)
{
NewScopeView(os as OverlayScope);
}
else if (os is OverlayControlPoint)
{
NewCPView(os as OverlayControlPoint);
}
else if (os is OverlayNode)
{
NewNodeView(os as OverlayNode);
}
}
}
else if (e.Type == TikzDisplayTree.DisplayTreeChangedType.Clear)
{
canvas1.Children.Clear();
}
}
void DisplayTree_DisplayTreeChanged(object sender, TikzDisplayTree.DisplayTreeChangedEventArgs e)
{
if (e.Type == TikzDisplayTree.DisplayTreeChangedType.Clear)
{
// clear bindings
foreach (var b in DisplayTreeBindings)
{
b.Source = null;
}
DisplayTreeBindings.Clear();
Invalidate();
}
if (e.Type == TikzDisplayTree.DisplayTreeChangedType.Insert)
{
// listen to BB changed to redraw if necessary
foreach (var os in e.AffectedItems)
{
DisplayTreeBindings.Add(BindingFactory.CreateBinding(os, "BB", o => this.Invalidate(), null));
}
Invalidate();
}
}
