Sample Code 6: How to place a background image in GtkWindow? |
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Written by kksou
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Tuesday, 12 September 2006 |
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Problem You want to place a background image in a GtkWindow as shown below:
Solution
- Load the image with
GdkPixbuf::new_from_file().
- Get the corresponding pixmap using
GdkPixbuf::render_pixmap_and_mask().
- Get the GtkStyle corresponding to the window with GtkWidget::get_style().
- Set the new style with GtkWidget::set_style().
Sample Code The following image file (sample6.png) is required by the sample code below. Please save a copy of the image file and put it in the same directory where you store the sample code.
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$window = new GtkWindow();
$window->connect_simple('destroy', array('Gtk','main_quit'));
$window->set_size_request(480, 240);
// set background image
$pixbuf=GdkPixbuf::new_from_file("sample6.png"); // note 1
list($pixmap,$mask)=$pixbuf-> render_pixmap_and_mask(255); // note 2
$style = $window->get_style(); // note 3
$style=$style->copy(); // note 4
$style->bg_pixmap[Gtk::STATE_NORMAL]=$pixmap; // note 5
$window->set_style($style); // note 6
// prints hello world
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Explanation
- Load the background image. This works with all standard image file format such as .gif, .jpg or .png.
- Convert to pixmap.
- Get the GtkStyle corresponding to the window.
- Make a copy of the style.
- Set the background image.
- Set the window with the new style.
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April 04, 2008 9:09pm