private static object CoerceIsSubmenuOpen(DependencyObject d, object value)
{
if ((bool)value)
{
MenuItemNew item = (MenuItemNew)d;
if (item.Role == MenuItemRole.SubmenuHeader)
{
if (item.IsMenuItemExpanded)
{
return(true);
}
else
{
return(false);
}
}
if (!item.IsLoaded)
{
item.Loaded += (s, e) =>
{
Application.Current.Dispatcher.BeginInvoke(DispatcherPriority.Input, new DispatcherOperationCallback(delegate(object param)
{
item.CoerceValue(MenuItemNew.IsSubmenuOpenProperty);
return(null);
}), null);
};
return(false);
}
}
return(value);
}
void MenuItemNew_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
MenuItemNew item = sender as MenuItemNew;
if (item.Role == MenuItemRole.SubmenuHeader)
{
IsMenuItemExpanded = !IsMenuItemExpanded;
IsSubmenuOpen = IsMenuItemExpanded;
}
}
void MenuItemNew_LostFocus(object sender, RoutedEventArgs e)
{
MenuItemNew item = sender as MenuItemNew;
item.IsMenuItemExpanded = false;
}