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Problem You have displayed a list of thumbnail images using GtkIconView as described in the article How to display a list of thumbnail images using GtkIconView?
In Part 2, you have hidden the text label of the thumbnail image.
In this Part 3, we will add a tooltip so that the text label will appear will the user hovers the mouse over the thumbnail image as shown below.
Solution Use GtkIconView::set_tooltip_column() to set the column in the iconview's model containing the tooltip text.
Important Note: This only works for PHP-GTK v2.0 (or PHP-GTK2 compliled with gtk+ v2.12 and above. If you are using an older version, for linux, you may follow the step-by-step instructions to recompile php-gtk2 with gtk+ v2.12. For windows, please refer to How to install php gtk2 on windows?
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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| <?php
$window = new GtkWindow();
$window->set_title($argv[0]);
$window->set_size_request(400, 240);
$window->connect_simple('destroy', array('Gtk','main_quit'));
$window->add($vbox = new GtkVBox());
// display title
$title = new GtkLabel("Display thumbnail images using GtkIconView\n".
" Part 2 - hide text labels");
$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));
}
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- 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
- Set the tooltip column.
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