import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;

import com.kddi.system.*;

public class GPSReader extends MIDlet implements CommandListener
{
    GPSCanvas gpsCanvas;

    Command exitCommand, gpsCommand;
    Display display;

    public GPSReader()
    {
        display = Display.getDisplay(this);
        exitCommand = new Command("Exit",Command.EXIT,1);
        gpsCommand = new Command("GPS",Command.SCREEN,1);
        gpsCanvas = new GPSCanvas();
        gpsCanvas.setCommandListener(this);
        gpsCanvas.addCommand(exitCommand);
        gpsCanvas.addCommand(gpsCommand);
        display.setCurrent(gpsCanvas);
    }

    public void startApp(){ }
    public void pauseApp(){ }
    public void destroyApp(boolean unconditional){ }

    public void commandAction(Command command,Displayable screen)
    {
        if(command==exitCommand){
            destroyApp(false);
            notifyDestroyed();
        }
        if(command==gpsCommand){
            gpsCanvas.showLocation();
        }
    }

    public class GPSCanvas extends Canvas
    {
        Location location;
        String latitude = "", longitude = "";
        Font font;
        int width, height;

        public GPSCanvas()
        {
            font = Font.getFont(Font.FACE_MONOSPACE,Font.STYLE_PLAIN,Font.SIZE_SMALL);
            width = getWidth();
            height = getHeight();
        }

        public void showLocation()
        {
            location = GpsLocation.getLocation();
            latitude = location.getLat();
            longitude = location.getLon();
            repaint();
        }

        public void paint(Graphics g) { 
            g.setColor(255,255,200);
            g.fillRect(0,0,width,height);
            g.setColor(0,0,0);
            g.setFont(font);
            g.drawString("位置取得結果",width/2,30,Graphics.HCENTER | Graphics.VCENTER );
            g.drawString(latitude,width/2,50,Graphics.HCENTER | Graphics.VCENTER );
            g.drawString(longitude,width/2,70,Graphics.HCENTER | Graphics.VCENTER );
        }
    }
}