Les valeurs RVB de la couleur sélectionnée sont affichées dans cette étiquette.
/* This is the application. */
public class MyApplication : Gtk.Application {
Gtk.Label label;
/* Override the 'activate' signal of GLib.Application. */
protected override void activate () {
/* Create the window of this application and show it. */
var window = new Gtk.ApplicationWindow (this);
window.title = "ColorButton";
window.set_default_size (150, 50);
window.set_border_width (10);
/* Create a new ColorButton with default blue. */
var blue = Gdk.RGBA ();
blue.parse ("blue");
var colorbutton = new Gtk.ColorButton.with_rgba (blue);
label = new Gtk.Label ("Click to choose a color");
var grid = new Gtk.Grid ();
grid.attach (colorbutton, 0, 0, 1, 1);
grid.attach_next_to (label, colorbutton, Gtk.PositionType.BOTTOM, 1, 1);
colorbutton.color_set.connect (this.on_color_set);
window.add (grid);
window.show_all ();
}
void on_color_set (Gtk.ColorButton button) {
var color = button.get_rgba ();
label.set_text ("RGBA: " + color.to_string());
}
}
/* main creates and runs the application. */
public int main (string[] args) {
return new MyApplication ().run (args);
}
Dans cet exemple, les éléments suivants sont utilisés :
Gtk.ColorButton
Gdk.RGBA