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Extending GtkFileSelection : the FileSelectionDialog class

Gio, 21/09/2006 - 09:00 — Marc Quinton

This FileSelectionDialog provides a wrapper around the standard GtkFileSelection class in PHP-GTK2, to make it easier to use.

Note : you can check a simpler introductory example to GtkFileSelection before delving into this class.

Main methods :

  • hide()
  • show()
  • get_selection() : return file section if OK pressed, return false if cancel button is pressed. (see usage below)

Quick overview (usage)

You can see how it easy to get a file ; all you need to do is to create a FileSelectionDialog instance and call the get_selection() method.

<?php
  $fs = new FileSelectionDialog('test');
  $fs->run();
  $file = $fs->get_selection();
  if ($file === FALSE)
    echo "canceled\n";
  else
    echo "selected file $file\n";
?>

Complete class code

complete code
<?php
error_reporting(E_ALL);

/**
* library class (need to be extended)
* @author Marc Quinton / september 2006.
*/
define('FS_ACTIVATE',       0);
define('FS_CANCEL',         1);

class FileSelectionDialog {
  private $fs;         # file selection dialog widget
  private $title;
  private $status;

  public function __construct($title) {
    $this->title = $title;
    $this->fs = new GtkFileSelection($title);
    $this->status = null;
    $this->fs->ok_button->connect_simple( 'clicked' ,
      array($this, 'activate'));
    $this->fs->cancel_button->connect_simple( 'clicked' ,
      array($this, 'cancel'));
    # need to catch double-click in list widget
  }

  public function show() {
    $this->fs->show();
  }

  public function hide() {
    $this->fs->hide();
  }

  function activate() {
    $this->status = FS_ACTIVATE;
    $this->hide();
    Gtk::main_quit();
  }

  function cancel() {
    $this->status = FS_CANCEL;
    $this->hide();
    Gtk::main_quit();
  }

  public function run() {
    $this->show();
    gtk::main();
  }

  public function get_selection() {
  if ($this->status == FS_ACTIVATE)
    return $this->fs->get_filename();
  else
    return false;
  }
}

class MyFileSelectionDialog extends FileSelectionDialog {
  function activate() {
    parent::activate();
    # do what you need here ...
    echo "activate\n";
  }

  function cancel() {
    parent::cancel();
    echo "cancel\n";
  }
}

/**
* test script
*/
function activate_fs_ok($fs) {
  echo "fs_ok\n";
  $fs->hide();
}

function activate_select() {
  # to handle cancel and OK button ; not really needed
  # $fs = new MyFileSelectionDialog('test');

  $fs = new FileSelectionDialog('test');
  $fs->run();

  $file = $fs->get_selection();
  if ($file === false)
    echo "canceled\n";
  else
    echo "selected file $file\n";
}

// standard stuff for window creation
$wnd = new GtkWindow();
$wnd->connect_simple('destroy', array('Gtk', 'main_quit'));
$wnd->set_position(Gtk::WIN_POS_CENTER);
$wnd->set_size_request(100, 100);

$btn = new GtkButton('select');
$btn->connect_simple('clicked', 'activate_select');

$wnd->add($btn);

$wnd->show_all();
Gtk::main();
?>