Re: Adding a callback to a GtkAction

["John Cupitt" <jcupitt gmail com>]

On 3/20/06, beckenba sfu ca <beckenba sfu ca> wrote:
> toolbar item.  Obviously I'm missing something.  How do you add a callback
> to a GtkAction item?

For a regular pushbutton item, make a table of GtkActionEntry:

static GtkActionEntry mainw_actions[] = {
        { "NewColumn",
                GTK_STOCK_NEW, N_( "New C_olumn" ), NULL,
                N_( "Create a new column" ),
                G_CALLBACK( mainw_column_new_action_cb ) },
....
};

Have some XML for your menubar:

static const char *mainw_menubar_ui_description =
"<ui>"
"  <menubar name='MainwMenubar'>"
"    <menu action='FileMenu'>"
"      <menu action='FileNewMenu'>"
"        <menuitem action='NewColumn'/>"
....

Then when you build a window, make an actiongroup:

        mainw->action_group = gtk_action_group_new( "MainwActions" );
        gtk_action_group_set_translation_domain( mainw->action_group,
                GETTEXT_PACKAGE );
        gtk_action_group_add_actions( mainw->action_group,
                mainw_actions, G_N_ELEMENTS( mainw_actions ),
                GTK_WINDOW( mainw ) );

Make a UI manager:

        mainw->ui_manager = gtk_ui_manager_new();
        gtk_ui_manager_insert_action_group( mainw->ui_manager,
                mainw->action_group, 0 );

Link the accelerators to your window:

        accel_group = gtk_ui_manager_get_accel_group( mainw->ui_manager );
        gtk_window_add_accel_group( GTK_WINDOW( mainw ), accel_group );

Build the menubar:

        error = NULL;
        if( !gtk_ui_manager_add_ui_from_string( mainw->ui_manager,
                        mainw_menubar_ui_description, -1, &error ) ) {
                g_message( "building menus failed: %s", error->message );
                g_error_free( error );
                exit( EXIT_FAILURE );
        }

Extract the built widgets and attach to your window:

        mbar = gtk_ui_manager_get_widget( mainw->ui_manager, "/MainwMenubar" );
        gtk_box_pack_start( GTK_BOX( vbox ), mbar, FALSE, FALSE, 0 );
        gtk_widget_show( mbar );

John