Sample Code 379: How to select a thumbnail image using double click in GtkIconView? |
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Written by kksou
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Tuesday, 27 November 2007 |
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Problem This is in response to jakh's post with regards to how to select a thumbnail image displayed in a GtkIconView with double click as shown below:
Solution To detect double-click on a thumbnail image, we use the signal item-activated. Note that this signal responds to both the double-click as well as pressing of the Enter key.
Sample Code Note: The following image files are required by the sample code below. Please save a copy of the image files and put them in the same directory where you store the sample code.
 | square_red.jpg |
 | square_yellow.jpg |
 | square_green.jpg |
 | square_blue.jpg |
 | square_blue2.jpg |
 | square_blue3.jpg |
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$window = new GtkWindow();
$window->set_size_request(400, 240);
$window->connect_simple('destroy', array('Gtk','main_quit'));
$window->add($vbox = new GtkVBox());
// display title
$title = new GtkLabel("Select a thumbnail image using double click");
$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(), 0, 0); // add a small gap
// Set up a scroll window
$scrolled_win = new GtkScrolledWindow();
$scrolled_win->set_policy( Gtk::POLICY_AUTOMATIC, Gtk::POLICY_AUTOMATIC);
if (defined("GObject::TYPE_STRING")) {
$model = new GtkListStore(GdkPixbuf::gtype, GObject::TYPE_STRING);
} else {
$model = new GtkListStore(GdkPixbuf::gtype, Gtk::TYPE_STRING);
}
foreach(array('square_red.jpg', 'square_yellow.jpg', 'square_green.jpg',
'square_blue.jpg', 'square_blue2.jpg', 'square_blue3.jpg') as $img) {
$pixbuf = GdkPixbuf::new_from_file($img);
$model->append(array($pixbuf, $img));
}
$view = new GtkIconView($model);
$view->set_pixbuf_column(0); // col 0 of the model
$view->set_text_column(1); // col 1 of the model
$view->set_selection_mode(Gtk::SELECTION_MULTIPLE);
$view->set_columns(0);
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Explanation The above makes use of the code from How to display a list of thumbnail images using GtkIconView?
What's new here:
- Set up the signal
item-activated so that users can select an image with double-click.
- Retrieve the name of the image selected.
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