/* Licence: williamsmobile.co.uk/licence.htm */

package mypackage;

import net.rim.device.api.i18n.SimpleDateFormat;
import net.rim.device.api.ui.component.LabelField;
import net.rim.device.api.ui.container.MainScreen;
import net.rim.device.api.ui.container.VerticalFieldManager;
import net.rim.device.api.ui.MenuItem;
import java.util.Date;
import java.util.TimeZone;

class WorldClock extends net.rim.device.api.ui.UiApplication {
    public static void main(String[] args) {
        new WorldClock().enterEventDispatcher();
    }

    WorldClock() {
        pushScreen(new MyScreen());
    }
}

class MyScreen extends MainScreen {
    private VerticalFieldManager manager;
    private boolean is24H = true;

    MyScreen() {
        setTitle("World Clock 1.0 - williamsmobile.co.uk");

        addMenuItem(new MenuItem("Refresh", 0, 0) {
            public void run() {
                refresh();
            }
        });
        addMenuItem(new MenuItem("Switch Time Format", 0, 0) {
            public void run() {
                is24H = !is24H;
                refresh();
            }
        });

        manager = new VerticalFieldManager(VerticalFieldManager.USE_ALL_WIDTH);
        add(manager);

        refresh();
    }

    private void refresh() {
        manager.deleteAll();

        String[] availableIDs = TimeZone.getAvailableIDs();
        sort(availableIDs);

        for (int i = 0; i < availableIDs.length; i++) {
            String id = availableIDs[i];
            TimeZone timeZone = TimeZone.getTimeZone(id);
            Date currentTime = new Date(System.currentTimeMillis() + timeZone.getRawOffset());

            SimpleDateFormat dateFormat = new SimpleDateFormat(is24H ? "EEE dd MMM HH:mm:ss" : "EEE dd MMM h:mm:ss a");
            String timeString = id + ": " + dateFormat.format(currentTime) + "\n\n";

            manager.add(new LabelField(timeString));
        }
    }

    private void sort(String[] arr) {
        int n = arr.length;
        for (int i = 0; i < n - 1; i++) {
            for (int j = i + 1; j < n; j++) {
                if (arr[i].compareTo(arr[j]) > 0) {
                    String temp = arr[i];
                    arr[i] = arr[j];
                    arr[j] = temp;
                }
            }
        }
    }

    protected boolean keyChar(char key, int status, int time) {
        switch (key) {
            case 't':
                this.getMainManager().setVerticalScroll(0);
                return true;
            case 'b':
                this.getMainManager().setVerticalScroll(this.getMainManager().getVirtualHeight());
                return true;
            default:
                return super.keyChar(key, status, time);
        }
    }
}