using GLib;

using Gtk;

public class Main : Object

{

	private Window window;

	private Image image;

	public Main () {

		window = new Window ();

		window.set_title ("Image Viewer in Vala");

		// Set up the UI

		var box = new Box (Orientation.VERTICAL, 5);

		var button = new Button.with_label ("Open image");

		image = new Image ();

		box.pack_start (image, true, true, 0);

		box.pack_start (button, false, false, 0);

		window.add (box);

		// Show open dialog when opening a file

		button.clicked.connect (on_open_image);

		window.show_all ();

		window.destroy.connect (main_quit);

	}

	public void dialog_response (Dialog dialog, int response_id) {

		switch (response_id) {

			case ResponseType.ACCEPT:

				var filename = (dialog as FileChooserDialog).get_filename ();

				image.set_from_file (filename);

				break;

			default:

				break;

		}

		dialog.destroy ();

	}

	[CCode (instance_pos = -1)]

	public void on_open_image (Button self) {

		var filter = new FileFilter ();

		var dialog = new FileChooserDialog ("Open image",

		                                    window,

		                                    FileChooserAction.OPEN,

		                                    Stock.CANCEL, ResponseType.CANCEL,

		                                    Stock.OK,     ResponseType.ACCEPT);

		filter.add_pixbuf_formats ();

		dialog.add_filter (filter);

		dialog.response.connect (dialog_response);

		dialog.show ();

	}

	static int main (string[] args) {

		Gtk.init (ref args);

		var app = new Main ();

		Gtk.main ();

		return 0;

	}

}