/// <include file='doc\Menu.uex' path='docs/doc[@for="Menu.MenuItemCollection.Add4"]/*' />
/// <devdoc>
/// Adds a MenuItem to this menu at the specified index. The item currently at
/// that index, and all items after it, will be moved up one slot.
/// MenuItems can only be contained in one menu at a time, and may not be added
/// more than once to the same menu.
/// </devdoc>
public virtual int Add(int index, MenuItem item)
{
// MenuItems can only belong to one menu at a time
if (item.menu != null)
{
// First check that we're not adding ourself, i.e. walk
// the parent chain for equality
if (owner is MenuItem)
{
MenuItem parent = (MenuItem)owner;
while (parent != null)
{
if (parent.Equals(item))
{
throw new ArgumentException(SR.GetString(SR.MenuItemAlreadyExists, item.Text), "item");
}
if (parent.Parent is MenuItem)
{
parent = (MenuItem)parent.Parent;
}
else
{
break;
}
}
}
item.menu.MenuItems.Remove(item);
}
if (index < 0 || index > owner.itemCount)
{
throw new ArgumentOutOfRangeException(SR.GetString(SR.InvalidArgument, "index", (index).ToString()));
}
if (owner.items == null || owner.items.Length == owner.itemCount)
{
MenuItem[] newItems = new MenuItem[owner.itemCount < 2? 4: owner.itemCount * 2];
if (owner.itemCount > 0)
{
System.Array.Copy(owner.items, 0, newItems, 0, owner.itemCount);
}
owner.items = newItems;
}
System.Array.Copy(owner.items, index, owner.items, index + 1, owner.itemCount - index);
owner.items[index] = item;
owner.itemCount++;
item.menu = owner;
owner.ItemsChanged(CHANGE_ITEMS);
return(index);
}
/// <include file='doc\Menu.uex' path='docs/doc[@for="Menu.MenuItemCollection.Add4"]/*' />
/// <devdoc>
/// Adds a MenuItem to this menu at the specified index. The item currently at
/// that index, and all items after it, will be moved up one slot.
/// MenuItems can only be contained in one menu at a time, and may not be added
/// more than once to the same menu.
/// </devdoc>
public virtual int Add(int index, MenuItem item)
{
// MenuItems can only belong to one menu at a time
if (item.Menu != null)
{
// First check that we're not adding ourself, i.e. walk
// the parent chain for equality
if (owner is MenuItem)
{
MenuItem parent = (MenuItem)owner;
while (parent != null)
{
if (parent.Equals(item))
{
throw new ArgumentException(string.Format(SR.MenuItemAlreadyExists, item.Text), "item");
}
if (parent.Parent is MenuItem)
{
parent = (MenuItem)parent.Parent;
}
else
{
break;
}
}
}
//if we're re-adding an item back to the same collection
//the target index needs to be decremented since we're
//removing an item from the collection
if (item.Menu.Equals(owner) && index > 0)
{
index--;
}
item.Menu.MenuItems.Remove(item);
}
// Validate our index
if (index < 0 || index > owner.ItemCount)
{
throw new ArgumentOutOfRangeException("index", string.Format(SR.InvalidArgument, "index", (index).ToString(CultureInfo.CurrentCulture)));
}
if (owner.items == null || owner.items.Length == owner.ItemCount)
{
MenuItem[] newItems = new MenuItem[owner.ItemCount < 2? 4: owner.ItemCount * 2];
if (owner.ItemCount > 0)
{
System.Array.Copy(owner.items, 0, newItems, 0, owner.ItemCount);
}
owner.items = newItems;
}
System.Array.Copy(owner.items, index, owner.items, index + 1, owner.ItemCount - index);
owner.items[index] = item;
owner._itemCount++;
item.Menu = owner;
owner.ItemsChanged(CHANGE_ITEMS);
if (owner is MenuItem)
{
((MenuItem)owner).ItemsChanged(CHANGE_ITEMADDED, item);
}
return(index);
}
