Re: How to put widget in CUSTOM GtkContainer

[Tomas Carnecky <tom dbservice com>]

AlannY wrote:
> Tomas Carnecky wrote:
> > AlannY wrote:
> > That still isn't the whole code! What does grid_class_init() do? Attach 
> > both the whole grid header and source file to the email.
>
> /* ********************************************** */
>
> static void
> grid_class_init (GridClass *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 = grid_destroy;
>
>    widget_class->realize = grid_realize;
>    widget_class->expose_event = grid_expose;

here you have to set GtkContainerClass->add, remove, forall and 
child_type. See 
http://svn.gnome.org/viewvc/gtk%2B/trunk/gtk/gtkbin.c?revision=19491&view=markup 
as an example of a widget that derives from GtkContainer.

> }
>
> /* ********************************************** */
> static void
> grid_init (Grid *grid)
> {
> }
>
> /* ********************************************** */
> static void
> grid_realize (GtkWidget *widget)
> {
>    Grid *grid;
>    GdkWindowAttr attributes;
>    gint attributes_mask;
>
>    g_return_if_fail (widget != NULL);
>    g_return_if_fail (IS_GRID (widget));
>
>    GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
>    grid = GRID (widget);
>
>    attributes.x = widget->allocation.x;
>    attributes.y = widget->allocation.y;
>    attributes.width = widget->allocation.width;
>    attributes.height = widget->allocation.height;
>    attributes.wclass = GDK_INPUT_OUTPUT;
>    attributes.window_type = GDK_WINDOW_CHILD;
>    attributes.event_mask = gtk_widget_get_events (widget) | 
> GDK_EXPOSURE_MASK;
>    attributes.visual = gtk_widget_get_visual (widget);
>    attributes.colormap = gtk_widget_get_colormap (widget);
>
>    attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
>    widget->window = gdk_window_new (widget->parent->window, &attributes, 
> attributes_mask);
>
>    widget->style = gtk_style_attach (widget->style, widget->window);
>
>    gdk_window_set_user_data (widget->window, widget);
>
>    gtk_style_set_background (widget->style, widget->window, 
> GTK_STATE_ACTIVE);
> }
>
> /* ********************************************** */
> static gboolean
> grid_expose (GtkWidget *widget,
>               GdkEventExpose *event)
> {
>    g_return_val_if_fail (widget != NULL, FALSE);
>    g_return_val_if_fail (IS_GRID (widget), FALSE);
>    g_return_val_if_fail (event != NULL, FALSE);
>
>    if (event->count > 0)
>      return FALSE;
>
>    return FALSE;
> }
>
> /* ********************************************** */
> static void
> grid_destroy (GtkObject *object)
> {
>    g_return_if_fail (object != NULL);
>    g_return_if_fail (IS_GRID (object));
>
>    if (GTK_OBJECT_CLASS (parent_class)->destroy)
>      (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
> }
>
> /* ********************************************** */
>
> That's all I have ;-)
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--
   So Long, and Thanks for All the Fish