[maemo-developers] GtkRadioActionEntry

[From: Aniello Del Sorbo]

Hi Joaquim,

indeed the on_change callback function was the path to follow.
A switch in it solves everthing.

The Toggle doesn't apply in my case, as I need the Radio concept (if
you select a Pen, you've got to deselect Eraser).

Thanks.
Aniello

2009/9/15 Joaquim Rocha <jrocha at igalia.com>:
> Hi Aniello,
>
> That callback in gtk_action_group_add_radio_actions connects to the
> "changed" signal of the radio actions.
>
> And from the docs:
> The ::changed signal is emitted on every member of a radio group when
> the active member is changed. The signal gets emitted after the
> ::activate signals for the previous and current active members.
>
> So, this way you can check which of the actions was changed (1st
> argument of the cb) and the one that got activated (2nd argument of the cb).
>
> On the other hand, the approach you mentioned (having a callback when
> the user presses the pen button) may be accomplished using
> GtkToggleAction objects with which you can assign a callback for every
> action.
> Since a radio button is a toggle button, it might work.
>
>
> Cheers,
>
> --
> Joaquim Rocha
>
> Aniello Del Sorbo wrote:
>> Actually I think I should use the on_change callback function in
>> gtk_action_group_add_radio_actions.
>>
>> Trying it..
>>
>> Will report.
>> Aniello
>>
>> 2009/9/15 Aniello Del Sorbo <anidel at gmail.com>:
>>> Hi,
>>>
>>> I have an issue with my interface.
>>>
>>> I've created my interface using GtkUIManager from an xml file.
>>> In this file I've created a toolbar:
>>>
>>>        <toolbar action='HildonToolBar'>
>>>                <toolitem action='Pen'/>
>>>                <toolitem action='Eraser'/>
>>>                <toolitem action='Highlighter'/>
>>>                <toolitem action='Text'/>
>>>        </toolbar>
>>>
>>> in the code I've this gtkradioaction entries:
>>>
>>> static GtkRadioActionEntry hildon_tools_radio_entries[] = {
>>>  { "Pen", "pen", N_("_Pen"), "<control><shift>P", NULL, 0 },
>>>  { "Eraser", "eraser", N_("_Eraser"), "<control><shift>E", NULL, 1 },
>>>  { "Highlighter", "highlighter", N_("_Highlighter"),
>>> "<control><shift>H", NULL, 2 },
>>>  { "Text", "text", N_("_Text"), "<control><shift>T", NULL, 3 }
>>> };
>>>
>>> that I add to an action group like this:
>>>
>>> gtk_action_group_add_radio_actions (action_group, hildon_tools_radio_entries,
>>>                  G_N_ELEMENTS(hildon_tools_radio_entries), 0, NULL,
>>> hildon_window);
>>>
>>> They show up fine, I can click on them and only one at a time is
>>> selected. And that's fine.
>>> But now, how can I set up a callback action whenever, for example, a
>>> Pen button is toggled?
>>>
>>> It worked for menus as the action entries for those had a callback
>>> entry I used to specify the callback function.
>>> But I am lost on how to connect those radio buttons to actual function
>>> in order to perform what they need.
>>>
>>> Also I want them to reflect the choice the user makes in the menu
>>> (actually, I have not dug into the menu issue yet, but I've noticed
>>> there are buttons now in Fremantle).
>>>
>>> Anyway.. suggestions?
>>>
>>> Thanks!
>>>
>>> --
>>> anidel
>>>
>>
>>
>>
>
>



-- 

--
anidel
Sent from London, Eng, United Kingdom