059. How to set up menu and radio menu - Part 2 - add stock images?

Problem

You have set up menus (with radio menus) in Part 1.

How to set up menu and radio menu - Part 1?

Now you would like to add in stock images to the menu items as shown below:

How to set up menu and radio menu - Part 2 - add stock images?


Solution


Sample Code

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<?php
$window = new GtkWindow();
$window->set_size_request(400, 150);
$window->connect_simple('destroy', array('Gtk','main_quit'));
$window->add($vbox = new GtkVBox());

// define menu definition
$menu_definition = array(
    '_File' => array('_New', '_Open', '_Close', '<hr>', '_Save', 'Save _As','<hr>', '_Quit'),
    '_Edit' => array('Cut', 'Copy', '_Paste', '<hr>', 'Select All', '<hr>', '_Undo','_Redo'),
    '_Test' => array('Test_1', 'Test_2', 'Test_3', '<hr>',
                array('Selection 1', 'Selection 2', 'Selection 3'),
                '<hr>', 'Test_4')
);
setup_menu($vbox, $menu_definition);

// display title
$title = new GtkLabel("Menu and RadioMenuItem - Part 2\n               Add Stock Images");
$title->modify_font(new PangoFontDescription("Times New Roman Italic 10"));
$title->modify_fg(Gtk::STATE_NORMAL, GdkColor::parse("#0000ff"));
$vbox->pack_start($title);
$vbox->pack_start(new GtkLabel(''));

$window->show_all();
Gtk::main();

// setup menu
function setup_menu($vbox, $menus) {
    $menubar = new GtkMenuBar();
    $vbox->pack_start($menubar, 0, 0);
    foreach($menus as $toplevel => $sublevels) {
        $menubar->append($top_menu = new GtkMenuItem($toplevel));
        $menu = new GtkMenu();
        $top_menu->set_submenu($menu);
        foreach($sublevels as $submenu) {
            if (is_array($submenu)) { // set up radio menus
                $i=0;
                $radio[0] = null;
                foreach($submenu as $radio_item) {
                    $radio[$i] = new GtkRadioMenuItem($radio[0], $radio_item);
                    $radio[$i]->connect('toggled', "on_toggle");
                    $menu->append($radio[$i]);
                    ++$i;
                }
                $radio[0]->set_active(1); // select the first item
            } else {
                if ($submenu=='<hr>') {
                    $menu->append(new GtkSeparatorMenuItem());
                } else {
                    $submenu2 = str_replace('_', '', $submenu); // note 1
                    $submenu2 = str_replace(' ', '_', $submenu2); // note 1
                    $stock_image_name = 'Gtk::STOCK_'.strtoupper($submenu2); // note 1
                    if (defined($stock_image_name)) {
                        $menu_item = new GtkImageMenuItem(constant($stock_image_name)); // note 2
                    } else {
                        $menu_item = new GtkMenuItem($submenu);
                    }
                    $menu->append($menu_item);
                    $menu_item->connect('activate', 'on_menu_select');
                }
            }
        }
    }
}

// process radio menu selection
function on_toggle($radio) {
    $label = $radio->child->get_label();
    $active = $radio->get_active();
    echo("radio menu selected: $label\n");
}

// process menu item selection
function on_menu_select($menu_item) {
    $item = $menu_item->child->get_label();
    echo "menu selected: $item\n";
    if ($item=='_Quit') Gtk::main_quit();
}

?>

Output

As shown above.
 

Explanation

  1. You can view the entire list of built-in stock images at here. What we are doing here is to check if the menu name has a corresponding built-in stock images. First we need to remove all "_", then replace all <space> with "_", then add "Gtk::STOCK_" in front of the string.
  2. Then we check if such constant exists. If yes, we construct the menu using GtkImagemenuitem. If no, we use the standard GtkMenuitem

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