Re: How to check if a radiobutton is activated?

[Brad House <brad mainstreetsoftworks com>]

Well with Glade/libglade, a function like this would
do the trick.  Radio buttons are checked and updated
like toggle_buttons

void SetRadioButton(char *name, int set)
{
  GtkWidget *widget;
  widget=glade_xml_get_widget(xml, name);
  gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(widget), set);
}

the char *name  is the name of the radio button widget as it will
check against your xml parsed by libglade (xml must be global
for this example function)
int set  is the radio button to be active, by numbers  0 is first
button, 1 is second button, etc...

-Brad

Patrice St-Gelais wrote:

> Hi,
>
> I don't know Glade, but maybe maybe if I describe how I use these
> buttons it can give you some hints.
>
> Usually a radio button would be matched with the content of a
> user-defined variable.  You update the variable in the callback function
> or functions connected to the buttons, using the "toggled" signal.  Each
> button is connected separately.  The variable could be a global one or
> an element of your callback data.
>
> When you create the radio buttons, you toggle the one corresponding with
> the value of the variable with :
>
>  gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button), TRUE);
>
> If you don't, the default is the first button in the group.  You must
> preset your user-defined variable accordingly.
>
> One simple way to deal with the callbacks functions is to write one for
> each button, hard-coding the update of your user-defined variable with a
> different value in each function.
>
> Another way is to check the content of the current button in a unique
> callback function, connected to each button.  For instance:
>
> void set_display_scale(GtkWidget *button, gpointer data) {
> // Sets the display scale from the label of a radio button
>  gchar *txt;
>  my_struct *my_s;
>  my_s = (my_struct *) data;
>  if (!gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(button)))
>     // We are clicking another button, untoggling the current one
>   return;
>  gtk_label_get(GTK_LABEL(GTK_BIN(button)->child), &txt);
>  if (!strcmp(SCALE_100, txt))
>   my_s->display_scale = 0;
>  else
>  if (!strcmp(SCALE_50, txt))
>   my_s->display_scale = 1;
> ....
>
> As you can guess, if the user never clicks on any button before
> committing the dialog ("OK'), you never know the actual button value
> without presetting your variable.
>
> There are probably other ways to know which button is currently
> activated, for instance, by "digging" into the group containing the
> buttons when "OK" is clicked, but it sounds to me rather unusual.
>
> Hoping this helps.
>
> Regards,
>
> Patrice St-Gelais
> __________________
> Kent Nyberg a écrit :
>
>
> > Hello!
> > In my program (created with glade/libglade) i use a dialog
> > with some radiobuttons in it. When the user clicks 'ok' the
> > function connected to the 'ok'-button should check witch
> > radiobutton is activated.
> > I looked in the archives but could only find something about
> > GTK_TOGGLE_BUTTON(radiobutton)->active but that
> > always gives me '1' no matter what
> > radiobutton is active.
> >
> > Can some one recomend a good example of how to check
> > radiobuttons? The GTK tutorial-examples does not cover my
> > problem, it only creates radiobuttons and leaves them. :(
> >
> > If some one could help me i would be very glad!
> >
> > _______________________________________________
> > gtk-app-devel-list mailing list
> > gtk-app-devel-list gnome org
> > http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
>
> _______________________________________________
> gtk-app-devel-list mailing list
> gtk-app-devel-list gnome org
> http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list



--
-----------------------------
Brad House
Sr. Developer
Main Street Softworks, Inc.

brad mainstreetsoftworks com
(352) 378-8228
-----------------------------