/* 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);

}