[Glade-users] Spin buttons.....

[Damon Chaplin]

vavaux@ulb.ac.be wrote:
> 
> Hello, I'm trying to use spin buttons to send value of the button to
> variables in my program but I didn't succeed well...
> 
> I've use the standard commands found in the faq but I have some trouble.
> 
> Here is the code I used:
> 
> void
> on_preferences1_activate        (GtkMenuItem    *menuitem,
>                                  gpointer        user_data)
> {
>    GtkWidget *prefs;
>    GtkWidget *value;
> 
>    prefs = create_sizelattice ();
>    gtk_widget_show (prefs);
> 
>    value = lookup_widget (prefs, "spinbutton1");
>    gtk_signal_connect (GTK_OBJECT (GTK_RANGE (value) -> adjustment,
> "changed", GTK_SIGNAL_FUNC (on_spin_button1_changed);
> 
> }
> 
> The function on_spin_button1_changed was directly generated by glade
> using properties -> signal but it's not alreday implemented. The
> 'sizelattice' is a dialog window that work fine except spinbuttons
> inside it.
> 
> While compiling, I obtained:
> 
> In function "on_preferences1_activate":
> tow few arguments to function 'gtk_signal_connect'
> error 1
> 
> So what did i wrong ?

You missed out a ')', and forget the 'data' argument to gtk_signal_connect.
Try this:

    gtk_signal_connect (GTK_OBJECT (GTK_RANGE (value) -> adjustment),
      "changed", GTK_SIGNAL_FUNC (on_spin_button1_changed), NULL);



 
> Another question ... what represent 'adjustment' ?

A GtkAdjustment - it just encapsulates a value which can be set and which
emits a signal when it is changed.

Damon