button_press_event for custom widget

["Florian Schaefer" <listbox netego de>]

Hi,

I'm currently trying to write a wigedt to visualize some graphical data.

The widget is inited by the following funcitons:

GType
gtk_spect_vis_get_type ()
{
  static GType spect_vis_type = 0;

  if (!spect_vis_type)
  {
    static const GTypeInfo spect_vis_info =
    {
      sizeof (GtkSpectVisClass),
      NULL,
      NULL,
      (GClassInitFunc) gtk_spect_vis_class_init,
      NULL,
      NULL,
      sizeof (GtkSpectVis),
      0,
      (GInstanceInitFunc) gtk_spect_vis_init,
    };

    spect_vis_type = g_type_register_static (GTK_TYPE_DRAWING_AREA,
"GtkSpectVis", &spect_vis_info, 0);
  }

  return spect_vis_type;
}

static void
gtk_spect_vis_init (GtkSpectVis *spectvis)
{
  GtkWidget *widget = NULL;
  GdkPixmap *pixmap = NULL;

  widget = gtk_drawing_area_new ();
  gtk_widget_set_events (widget, GDK_EXPOSURE_MASK
    | GDK_BUTTON_PRESS_MASK
    | GDK_BUTTON_RELEASE_MASK
    | GDK_POINTER_MOTION_MASK
    | GDK_POINTER_MOTION_HINT_MASK);

  gtk_widget_show (widget);

  spectvis->draw = widget;
  spectvis->pixmap = pixmap;
}

And the class_init looks like this:

static void
gtk_spect_vis_class_init (GtkSpectVisClass *class)
{
  GtkObjectClass *object_class;
  GtkWidgetClass *widget_class;

  object_class = (GtkObjectClass*) class;
  widget_class = (GtkWidgetClass*) class;

  parent_class = gtk_type_class (gtk_widget_get_type ());

  object_class->destroy = gtk_spect_vis_destroy;
  widget_class->expose_event = gtk_spect_vis_expose;
  widget_class->size_request = gtk_spect_vis_size_request;
  widget_class->configure_event = gtk_spect_vis_configure;
  widget_class->button_press_event = gtk_spect_vis_button_press;
}

My problem is hat the following function never gets called:

static gboolean
gtk_spect_vis_button_press (GtkWidget *widget, GdkEventButton *event)
{
  g_return_val_if_fail (GTK_IS_SPECTVIS (widget), FALSE);
  g_return_val_if_fail (event != NULL, FALSE);

  g_print ("button_press_event\n");

  return TRUE;
}

Therefore my question is: What do I have to do that I can click into my
widget and receive the appropriate event?

Ciao
Florian