php-gtk2 Cookbook: How to setup a dialog box - Part 4 - non integer response id?

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Sample Code 234: How to setup a dialog box - Part 4 - non integer response id?

Written by kksou

Wednesday, 16 May 2007

Problem

Suppose you have setup a dialog box similar to the example How to setup a dialog box - Part 2 - simple yes no dialog?.

Instead of returning 100 and 200, you would like to return 'Yes' and 'No' respectively (i.e. non-integer response IDs) for the buttons as shown below:

How to setup a dialog box - Part 4 - non integer response id?

Solution

If you use the method GtkDialog::response() to exit the dialog, you will find that the response ID has to be an integer. You cannot return a response with a non-integer response.

To return a non-integer response, we have to set up the dialog manually.

Set up the buttons manually as outlined in the article How to setup a dialog box - Part 3 - set up buttons manually?
In the button click event handler, store the response ID somewhere e.g. in a global variable.
Destroy the dialog manually with GtkObject::destroy().

Sample Code

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<?php
$window = new GtkWindow();
$window->set_title($argv[0]);
$window->set_size_request(400, 120);
$window->connect_simple('destroy', array('Gtk','main_quit'));
$window->add($vbox = new GtkVBox());

// display title
$title = new GtkLabel("Set up a simple yes/no dialog\n".
"Part 4 - Return a non-integer response ID");
$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);
$title->set_justify(Gtk::JUSTIFY_CENTER);
$alignment = new GtkAlignment(0.5, 0, 0, 0);
$alignment->add($title);
$vbox->pack_start($alignment, 0, 0);
$vbox->pack_start(new GtkLabel(), 0, 0);

$vbox->pack_start($hbox = new GtkHBox(), 0);
$hbox->pack_start(new GtkLabel('Response: '), 0);
$hbox->pack_start($response = new GtkEntry(), 0);
$hbox->pack_start($button = new GtkButton('Get Yes/No Response'), 0);
$button->connect('clicked', 'on_click');

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

function on_click() {
    setup_yes_no_dialog();
}

function setup_yes_no_dialog() {

    $dialog = new GtkDialog();
    $label = new GtkLabel("Do you like PHP-Gtk2?");
    $dialog->vbox->pack_start($label);

    $button_yes = GtkButton::new_from_stock(Gtk::STOCK_YES);
    $button_no = GtkButton::new_from_stock(Gtk::STOCK_NO);

    $button_yes->connect('clicked', 'on_ok_button', $dialog, 'Yes'); // note 1
    $button_no->connect('clicked', 'on_ok_button', $dialog, 'No'); // note 2

    $hbox = new GtkHBox();
    $dialog->vbox->pack_start($hbox);

Note that this is only 70% of the sample code. You have to be a registered member to see the entire sample code. Please login or register.
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Explanation

We make use of the code from How to setup a dialog box - Part 3 - set up buttons manually? to manually set up the Yes/No buttons.

What's new here:

Create the Yes button with a response ID of 'Yes'.
Create the No button with a response ID of 'No'.
Store the response ID in the global variable $response.
Destroy the dialog.
Echo the response in the GtkEntry, which is stored in the global variable $response_str.

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