Re: newbie question

[Tadej BorovÅak <tadeboro gmail com>]

2009/3/11 frederico schardong <frede sch gmail com>:
> > void my_callback_function (GtkButton *widget, gpointer user_ptr);
> >
> > ...
> >
> > g_signal_connect( G_OBJECT( widget), "clicked",
> > Â Â Â G_CALLBACK( my_callback_function), user_ptr );
> >
> >
> > void my_callback_function (GtkButton *widget, gpointer user_ptr) {
> >
> > Â Â Â ...
> > }
> >
> >
> > http://library.gnome.org/devel/gtk/unstable/GtkButton.html
>
> but how I can pass to my_callback_function the gtk_drawing_area? I
> know about the g_signal_connect.. but I not know how pass another
> widget, Â Â Â Â without the widget being passed the first parameter of
> function..
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Hello.

Just pass your drawing area as a last parameter to g_signal_connect function.

Simple code would look like:

---------- CODE -----------
int
main( int argc, char **argv )
{
    GtkWidget *button = gtk_button_new();
    GtkWidget *draw = gtk_drawing_area_new();

    g_signal_connect( G_OBJECT( button ), "clicked",
                      G_CALLBACK( cb_clicked ), draw );

    /* More code here */
}


/* Callback function */
static void
cb_clicked( GtkButton *button,
            GtkWidget *draw )
{
    /* Code here to save your work */
}

------- /CODE ----------

-- 
Tadej BorovÅak
tadeboro gmail com
tadej borovsak gmail com