Re: Using data parameter for callback functions

[Malek Naffati <Redhat tuX gmx net>]

Gee, it works, but I dont quite get why the generic approach doesn't
supply the correct data address. I haven't found a note anywhere indicating that I have to use the specific 
event handler for some
 widget. Good thing to know anyhow, big thx.

- Malek

> On Sun, 25 Jan 2004 18:25:36 +0000
> Tim Müller <zen18864 zen co uk> wrote:

> You have to check the API reference to see what the callback function for a 
> signal needs to look like:
>
>   http://developer.gnome.org/doc/API/2.0/gtk/GtkWidget.html#GtkWidget-button-press-event
>
> In your case, the callback needs to be
>
> static gboolean
> cancel_button_pressed (GtkWidget *w, GdkEventButton *bevent, gpointer data)
> {
>     gtk_widget_hide(GTK_WIDGET(data));
>    ....
> }
>
> Also check out the Gtk+ Tutorial, esp. section 3.4:
>  
>    http://www.gtk.org/tutorial/
>    http://www.gtk.org/tutorial/sec-events.html
>
>
> Cheers
> -Tim
>
>
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