package com.j2medev.chapter7;

import java.io.IOException;
import javax.microedition.lcdui.*;
import javax.microedition.media.*;
import javax.microedition.media.control.VideoControl;

public class CameraForm extends Form implements Runnable,CommandListener {
    
    private Command backCommand = new Command("back",Command.BACK,1);
    private Command captureCommand = new Command("Capture",Command.OK,2);
    private Displayable parent = null;
    private Player player = null;
    private VideoControl vc = null;

    public CameraForm(Displayable _parent) {
        super("capture");
        this.parent = _parent;
        if(player == null)
            createPlayer();
        addCommand(backCommand);
        setCommandListener(this);
    }
    
    private void createPlayer(){
        try{
            player = Manager.createPlayer("capture://video");
            player.realize();
            vc = (VideoControl)player.getControl("VideoControl");
            if(vc != null)
                append((Item)vc.initDisplayMode(VideoControl.USE_GUI_PRIMITIVE,null));
            vc.setDisplayFullScreen(true);
            player.start();
            addCommand(captureCommand);
        }catch(MediaException ex){
        }catch(IOException ex){
        }
    }
    public void commandAction(Command command, Displayable displayable) {
        if(command == backCommand){
            PuzzleMIDlet.setCurrent(parent);
            releasePlayer();
        } else if(command == captureCommand){
            new Thread(this).start();
        }
    }
    
    private void releasePlayer(){
        if(player != null){
            player.close();
            player = null;
        }
    }
    
    public void run() {
        try {
            byte[] img = vc.getSnapshot(null);
            Image image = Image.createImage(img,0,img.length);
            releasePlayer();
            //可以把照片存儲在RMS中，以后繼續玩。
            GameCanvas canvas = new GameCanvas(image);
            PuzzleMIDlet.setCurrent(canvas);
        } catch (MediaException ex) {
            ex.printStackTrace();
        }
    }
}