private static void AttachEventHandlers(TextBoxBase textBox, UndoManager manager)
{
if (textBox != null && manager != null)
{
textBox.AddHandler(CommandManager.PreviewExecutedEvent, new ExecutedRoutedEventHandler(manager.ExecutedHandler), true); // we need to see all events to subvert the built-in undo/redo tracking in the text boxes
textBox.TextChanged += new TextChangedEventHandler(manager.TextChangedHandler);
}
}
public static void SetSharedUndoScope(DependencyObject obj, UndoManager value)
{
if (obj == null) { throw new ArgumentNullException("obj"); }
obj.SetValue(SharedUndoScopeProperty, value);
}
private static void RemoveEventHandlers(TextBoxBase textBox, UndoManager manager)
{
if (textBox != null && manager != null)
{
textBox.RemoveHandler(CommandManager.PreviewExecutedEvent, new ExecutedRoutedEventHandler(manager.ExecutedHandler));
textBox.TextChanged -= new TextChangedEventHandler(manager.TextChangedHandler);
}
}