Re: g_signal_connect isn't working

[Olexiy Avramchenko <olexiy ctech cn ua>]

Pier-Luc Charbonneau wrote:
> static gboolean recalculate_psi_consumption(GtkWidget *widget, gpointer data)
This is your callback declaration. It takes 2 parameters.
>    g_signal_connect(G_OBJECT(start),"key_press_event",G_CALLBACK(recalculate_psi_consumption),(gpointer)psi);
"key-press-event" signal handler must take 3 parameters, look at:
http://developer.gnome.org/doc/API/2.0/gtk/GtkWidget.html#GtkWidget-key-press-event
You have to make a wrapper over your callback, smth like:
static gboolean wrapper (GtkWidget *widget, GdkEvent *event, gpointer data)
{
        recalculate_psi_consumtion (widget, data);
        return FALSE; /* or TRUE if you dont want other callbacks to pop-up */
}
>    g_signal_connect(G_OBJECT(button),"clicked",G_CALLBACK(recalculate_psi_consumption),(gpointer)psi);
This one is Ok. "clicked" callback takes 2 parameters, like your callback.

Keep in mind that all "*-event" callbacks want three parameters: widget, event 
structure and user data. Even more - they should return gboolean value: TRUE 
means that event was processed and FALSE means that event wasn't processed and 
all other callbacks will be called.

        Olexiy