How to add a contextual menu to a Spec ListModel

> On 24 May 2017, at 11:58, Nicolai Hess <[hidden email]> wrote:
>
>
>
> 2017-05-24 11:25 GMT+02:00 Sven Van Caekenberghe <[hidden email]>:
> Hi,
>
> I am struggle a bit in find the right way to add a contextual menu to a Spec ListModel.
>
> Consider:
>
> ListModel new
>   title: 'List Example';
>   items: Smalltalk allClasses;
>   openWithSpec.
>
> I would like to add a right-click contextual menu to the list, with for example a 'Browse' action. I can't find such a simple example. I know there is a #menu: option, I can see some usages in my image, but they seem to do different things. What would be the recommended approach ?
>
> ListModel new
>   title: 'List Example';
>   items: Smalltalk allClasses;
>   "menu: [ ];"
>   openWithSpec.
>
> Thanks,
>
> Sven
>
> PS: Probably the reference to the #selectedItem of the ListModel for the action is hard to write in a one-liner, that is not a requirement.
>
>
> It is a problem or at least confusing that the menu: method does not uses a MenuModel, but a Morphic menu.
>
> If you don't want to touch a Morphic class from within the ListModel,
> you can do it like it is done in some tools, just ignore the MenuMorph and instantiate a new MenuModel and call
> buildWithSpecAsPopup.
>
> Or add your menu items  to the menu argument:
>
> l:=ListModel new.
> l
>   title: 'List Example';
>   items: Smalltalk allClasses;
>   menu: [:menu :shifted |
>         (menu
>             add: 'Browse'
>             target: l selectedItem
>             selector: #browse)
>             isEnabled: l selectedItem notNil.
>             "return the menu object"
>             menu
>             ];
>   openWithSpec.