public static MenuItem AddOrGetMenuItem(MenuItem parent, MenuGroupItem item, IMenuCommand menuCommand)
{
var menuItem = parent.AddOrGetMenuItem(item);
UpdateMenuItemProperties(menuCommand, menuItem);
return(menuItem);
}
private MenuItem(MenuGroupItem item)
{
if (item == null)
{
throw new ArgumentNullException(nameof(item));
}
Name = item.Name;
Precedence = item.Precedence;
Group = item.Group;
GroupPrecedence = item.GroupPrecedence;
Items = new ObservableCollection <MenuItem>();
}
internal MenuItem AddOrGetMenuItem(MenuGroupItem item)
{
if (Items.Any(x => x.Name == item.Name && x.Group != item.Group))
{
throw new InvalidOperationException($"A menu item can only appear in one group: {item.Name} cannot be added to group {item.Group}");
}
var matchedItems = Items.Where(x => x.Name == item.Name && x.Group == item.Group);
var menuItems = matchedItems as IList <MenuItem> ?? matchedItems.ToList();
if (!menuItems.Any())
{
Items.Add(new MenuItem(item));
}
else if (menuItems.First().Precedence != item.Precedence || menuItems.First().GroupPrecedence != item.GroupPrecedence)
{
throw new InvalidOperationException(
$"Cannot add items with different precedence {item.Precedence}/{item.GroupPrecedence} to group precedence {menuItems.First().Precedence}/{menuItems.First().GroupPrecedence}");
}
return(Items.Single(x => x.Name == item.Name));
}