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

Problem

You want to set up menus (with radio menus) as shown below:

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


Solution

The steps to create menus are as follows:


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
$menu_definition = array(
    '_File' => array('_New', '_Open', '_Close', '_Quit'),
    '_Test' => array('Test1', 'Test2', 'Test3', '<hr>',
                array('Selection 1', 'Selection 2', 'Selection 3'), // note 2
                '<hr>', 'Test4')
);
setup_menu($vbox, $menu_definition); // note 1

// setup menu
function setup_menu($vbox, $menus) { // note 1
    $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) {// note 3
                    $radio[$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 {
                    $menu->append($menu_item = new GtkMenuItem($submenu));
                    $menu_item->connect('activate', 'on_menu_select');
                }
            }
        }
    }
}

// process radio menu selection
function on_toggle($radio) { // note 3
    $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();
}

// display title
$title = new GtkLabel("Menu and RadioMenuItem");
$title->modify_font(new PangoFontDescription("Times New Roman Italic 10"));
$title->modify_fg(Gtk::STATE_NORMAL, GdkColor::parse("#0000ff"));
$title->set_size_request(-1, 40);
$vbox->pack_start($title, 0, 0);
$vbox->pack_start(new GtkLabel(''));

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

?>

Output

As shown above.
 

Explanation

  1. We write a setup_menu() here to simplify the setup of menus.
  2. For radio menus, enclose the options in an array in the menu definition.
  3. The display and processing of radio buttons is exactly the same as the method as described in the article How to display and process grouped radio buttons?

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