Re: Custom NSMenu
Re: Custom NSMenu
- Subject: Re: Custom NSMenu
- From: Graham Cox <email@hidden>
- Date: Mon, 16 Jun 2008 13:31:05 +1000
I think the short answer is: you can't (in Cocoa).
This has always been a bit tricky to implement, going right back to
the original Mac OS c. 1984. While a pop-up is down and tracking it is
handling its own event loop so is probably ignoring mouseEntered: and
mouseExited: events. If your menus are completely custom anyway, you
might be able to achieve the same result by using a temporary window
and handling the events yourself. If they are mostly standard menu
items, you'd have a lot of work to do to emulate the standard
appearance (and be at the mercy of future changes).
It would probably be worth filing a feature enhancement request (such
as getting notifications when menu tracking leaves the menu area
itself) so that implementing custom menubars, etc. is at least possible.
Another possibility is to drop down to the Carbon menu manager to
handle this, where there are some supported lower-level hooks for
doing this. It's been a long time since I looked at that but I did
port an app to Carbon/OS X back in 2000 that implemented a custom
menubar like this and got it working OK. Unfortunately that code was
proprietary and I do not have a copy so I can't advise on the details.
I do know the same code is still working on Leopard though!
Graham
On 16 Jun 2008, at 1:09 am, Marco Cassinerio wrote:
I've to build e custom menu like this:
| "menu item 1" | "menu item 2" | "menu item 3" |
Every menu item is a NSPopUpMenu's subclass with a custom image
displayed. When the user left-click on a menu item a PopUpMenu is
displayed.
What i would is let the user to left-click and move mouse over the
others menu item to display their respective popupmenu.
I tried to add a tracking rect to every menu item but mouseEntered:
and mouseExited: events seem to not be delivered when popupmenu is
opened.
Is it a correct behaviour? How can i track mouse events when a
popupmenu is opened?
Marco.
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| References: | |
| | >Custom NSMenu (From: Marco Cassinerio <email@hidden>) |