private void OnWorkspaceUnloaded(object sender, RoutedEventArgs e)
{
// stop monitoring input
InputManager.Current.PreProcessInput -= OnPreProcessInput;
_crackRootVisual = null;
// stop monitoring selection changes in the TreeView
Tree.SelectedItemChanged -= OnTreeSelectionChanged;
// release the viewmodel
ViewModel = null;
}
private void OnWorkspaceLoaded(object sender, RoutedEventArgs e)
{
// store a reference to the ViewModel for easy access
ViewModel = DataContext as ElementTreeExplorerViewModel;
// monitor selection changes in the TreeView
Tree.SelectedItemChanged += OnTreeSelectionChanged;
// monitor input to catch the Shift+Ctrl modifiers
_crackRootVisual = PresentationSource.FromVisual(this).RootVisual;
InputManager.Current.PreProcessInput += OnPreProcessInput;
// if the root has not been set, locate and inspect the application's root
if (ViewModel.Root == null)
{
object root = null;
if (Application.Current != null && Application.Current.MainWindow != null)
{
root = Application.Current;
}
else
{
foreach (PresentationSource presentationSource in PresentationSource.CurrentSources)
{
if (presentationSource.RootVisual != null)
{
root = presentationSource.RootVisual;
break;
}
}
}
if (root != null)
{
ViewModel.Inspect(root);
}
}
}
