private void CalculateMenuItems(ICollection <INavigationMenuDescriptor> menuDescriptors, ICollection <NavigationMenuItem> menuItems)
{
if (menuDescriptors == null)
{
return;
}
foreach (var menuDescriptor in menuDescriptors)
{
var menuItem = new NavigationMenuItem {
DataContext = menuDescriptor
};
menuItem.SetBinding(NavigationMenuItem.ItemTemplateProperty, new Binding(menuDescriptor.IsRoot ? "RootItemTemplate" : "LeafItemTemplate")
{
Source = this
});
menuItem.AddHandler(NavigationMenuItem.SelectionChangedEvent, new RoutedPropertyChangedEventHandler <bool>(OnNavigationMenuItemSelectionChanged));
menuItems.Add(menuItem);
if (!(menuDescriptor.Items?.Any() ?? false))
{
continue;
}
if (menuItem.MenuItems == null)
{
menuItem.MenuItems = new List <NavigationMenuItem>();
}
CalculateMenuItems(menuDescriptor.Items, menuItem.MenuItems);
}
}
private void UnselectOldSelectedMenuItems(NavigationMenuItem selectedMenuItem)
{
var oldSelectedMenuItems = MenuItems.Where(item => item.MenuItems != null)
.SelectMany(item => item.MenuItems)
.Concat(MenuItems)
.Where(item => !Equals(item, selectedMenuItem))
.Where(item => item.IsSelected)
.ToArray();
foreach (var item in oldSelectedMenuItems)
{
if (!(item.MenuItems?.Any(subItem => subItem.Equals(selectedMenuItem)) ?? false))
{
item.IsSelected = false;
}
}
}
private void SelectMenuItem(NavigationMenuItem item)
{
SelectedItem = item.DataContext as INavigationMenuDescriptor;
SelectedMenuItem = item;
UnselectOldSelectedMenuItems(item);
}
