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Problem You have set up menus with stock images in Part 2.
Now you would like to add accelerator keys to the menu items as shown below:
Solution
Sample Code 1
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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());
$accel_group = new GtkAccelGroup(); // create a new accelerator
$window->add_accel_group($accel_group); // attach it to the window
// define menu definition
$menu_definition = array( // note 1
'_File' => array('_New|N', '_Open|O', '_Close|C', '<hr>',
'_Save|S', 'Save _As','<hr>', '_Quit'),
'_Edit' => array('Cut|X', 'Copy|C', '_Paste|V', '<hr>',
'Select All|A', '<hr>', '_Undo|Z','_Redo|Y'),
'_Test' => array('Test_1|1', 'Test_2|2', 'Test_3|3', '<hr>',
array('Selection 1', 'Selection 2', 'Selection 3'),
'<hr>', 'Test_4|4')
);
setup_menu($vbox, $menu_definition);
// display title
$title = new GtkLabel("Menu and RadioMenuItem - Part 3\n".
" add accelerators");
$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) {
global $accel_group; // don't forget this
$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 $submenu) {
if (strpos("$submenu", '|') === false) { // note 2
$accel_key = '';
} else {
list($submenu, $accel_key) = explode('|', $submenu);
}
if (is_array($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);
$submenu2 = str_replace(' ', '_', $submenu2);
$stock_image_name = 'Gtk::STOCK_'.strtoupper($submenu2);
if (defined($stock_image_name)) {
$menu_item = new GtkImageMenuItem(
constant($stock_image_name));
} else {
$menu_item = new GtkMenuItem($submenu);
}
if ($accel_key!='') {
$menu_item->add_accelerator("activate", $accel_group,
ord($accel_key), Gdk::CONTROL_MASK, 1); // note 3
}
$menu->append($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();
}
?> |
Explanation
- Note that we modified the menu definition a bit. To specify an accelerator key, simply put a '|' followed by the accelerator key, for example, 'Cut|X', 'Copy|C', '_Paste|V'.
- The purpose of the codes here is just to extract any accelerator key from the menu definition.
- If an accelerator key is specified, we add it using GtkWidget::add_accelerator().
Note
Note that accelerators are different from mnemonics. For example, you can choose File Open using mnemonics by pressing Alt-F followed by O. Or you can use the accelerator key Ctrl-O.
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