package progressbar;

import org.gnu.glib.Fireable;
import org.gnu.glib.Timer;
import org.gnu.gtk.Alignment;
import org.gnu.gtk.Button;
import org.gnu.gtk.Gtk;
import org.gnu.gtk.HSeparator;
import org.gnu.gtk.ProgressBar;
import org.gnu.gtk.VBox;
import org.gnu.gtk.Window;
import org.gnu.gtk.WindowType;
import org.gnu.gtk.event.ButtonEvent;
import org.gnu.gtk.event.ButtonListener;
import org.gnu.gtk.event.LifeCycleEvent;
import org.gnu.gtk.event.LifeCycleListener;

public class ProgressBarTest implements Fireable {

    private ProgressBar progressbar = null;

    private Timer timer = null;

    public ProgressBarTest() {

        Window window = new Window(WindowType.TOPLEVEL);
        window.setBorderWidth(0);
        window.setTitle("ProgressBar Example");
        window.addListener(new LifeCycleListener() {
            public void lifeCycleEvent(LifeCycleEvent event) {
            }

            public boolean lifeCycleQuery(LifeCycleEvent event) {
                if (event.isOfType(LifeCycleEvent.Type.DESTROY)
                        || event.isOfType(LifeCycleEvent.Type.DELETE)) {
                    Gtk.mainQuit();
                }
                return false;
            }
        });

        VBox vbox = new VBox(false, 5);
        vbox.setBorderWidth(10);
        window.add(vbox);

        /* Create a centering alignment object */
        Alignment align = new Alignment(0.5, 0.5, 0, 0);
        vbox.packStart(align, false, false, 5);

        /* Create the ProgressBar using the adjustment */
        progressbar = new ProgressBar();

        align.add(progressbar);

        HSeparator hsep = new HSeparator();
        vbox.packStart(hsep, false, false, 0);

        /* Add a button to exit the program */
        Button button = new Button("close");
        button.addListener(new ButtonListener() {
            public void buttonEvent(ButtonEvent event) {
                if (event.isOfType(ButtonEvent.Type.CLICK)) {
                    exitProgram();
                }
            }
        });
        vbox.packStart(button, false, false, 0);

        window.showAll();

        timer = new Timer(100, this);
        timer.start();
    }

    public boolean fire() {
        double percent = progressbar.getFraction();
        if (percent >= .99)
            percent = 0.0;
        else {
            percent += 0.01;
            if (percent >= 1.0)
                percent = .999;
        }
        progressbar.setFraction(percent);
        return true;
    }

    public void exitProgram() {
        /* First stop the timer */
        timer.stop();
        /* Now stop the event loop and exit GTK */
        Gtk.mainQuit();
    }

    public static void main(String[] args) {
        // Initialize GTK
        Gtk.init(args);

        ProgressBarTest pb = new ProgressBarTest();

        Gtk.main();
    }
}