Re: bug with Gtk2::ActionGroup->add_radio_actions() ?

[muppet <scott asofyet org>]

On Jul 24, 2006, at 3:03 PM, Jaap Karssenberg wrote:

> I try to add a number of radio actions to a menu without setting  
> one of
> them active yet. (The reason for this is that I want the "on_change"
> callback to be called when I later set the default value from the
> applications config file).
>
> The C api reference say about the "value" argument to  
> "add_radio_actions()"
>
>         the value of the action to activate initially, or -1 if no
>         action should be activated
>
> I tried setting this value to -1 and to undef, but somehow the first
> radio action is always set active.
>
> Could this be a bug in the perl bindings or do I need to look  
> elsewhere ?

The implementation of add_radio_actions() in the bindings is very  
similar to the implementation of  
gtk_action_group_add_radio_actions_full() in gtk+; it had to be  
reimplemented to handle marshaling parameters from the perl stack.   
The logic is basically:

    pull fixed arguments from the stack
    create a temp array big enough to hold all the entries
    parse the entries from the rest of the stack
    for each action
         create the action
         add to group
         if (value == entries[i].value)
             gtk_toggle_action_set_active (action, TRUE);
         more setup

The "value" argument appears only in two places --- where it is  
pulled from the stack, and where it is compared with entries 
[i].value.  The entries are parsed by a local function which will  
coerce undef to 0, but should leave -1 unchanged.


Of course, some time has passed (*cough*) since you posted this, and  
maybe the bug has already been fixed.  Are you still seeing this  
behavior?