public void SetContext(ViewModel.INodeMap viewModel_)
{
Debug.Assert(viewModel_ != null);
viewModel = viewModel_;
viewModel.NodeAdded += OnNodeAdded;
viewModel.PopulateNodes();
}
void OnDestroy()
{
if (viewModel == null)
{
return;
}
viewModel.NodeAdded -= OnNodeAdded;
viewModel = null;
}
