gamenavigator.java

j2me游戏引擎 j2me游戏引擎

package cn.org.matrix.gmatrix.practice.demo01;

import javax.microedition.lcdui.Display;
import javax.microedition.midlet.MIDlet;
/**
 * 游戏导航类
 * @author cleverpig
 *
 */
public class GameNavigator {
	//保存对MainMIDlet的引用
	private MIDlet mainMIDlet=null;
	
	//定义流程控制的标识
	//主MIDlet标识
	public static final int MAIN_MIDLET=0;
	//gameLoaderCanvas标识
	public static final int GAMELOADER_CANVAS=1;
	//游乐场Canvas标识
	public static final int CARNIE_CANVAS=2;
	//对话框Canvas标识
	public static final int DIALOG_CANVAS=3;
	//菜单标识
	public static final int MENU_CANVAS=4;
	//退出标识
	public static final int EXIT=-1;
	
	/**
	 * 构造方法
	 * @param mainMIDlet 作为游戏入口的MainMIDlet
	 */
	public GameNavigator(MIDlet mainMIDlet){
		this.mainMIDlet=mainMIDlet;
	}
	
	/**
	 * 导航功能：根据传入的index作为流程控制的标识进行导航
	 * @param index 流程控制的标识
	 */
	public void switchSomething(int index){
		switch(index){
		//切换到gameLoaderCanvas
		case GAMELOADER_CANVAS:
			if (MainMIDlet.gameLoadProcess!=null){
				MainMIDlet.gameLoadProcess.init();
				Thread loadProcessTh=new Thread(MainMIDlet.gameLoadProcess);
				loadProcessTh.start();
				Display.getDisplay(mainMIDlet).setCurrent(MainMIDlet.gameLoadProcess);
			}
			break;
		//切换到游乐场Canvas
		case CARNIE_CANVAS:
			if (MainMIDlet.carnieCanvas!=null){
				MainMIDlet.carnieCanvas.init(MainMIDlet.params);
				Thread carnieTh=new Thread(MainMIDlet.carnieCanvas);
				carnieTh.start();
				Display.getDisplay(mainMIDlet).setCurrent(MainMIDlet.carnieCanvas);
			}
			break;
		//切换到对话框Canvas
		case DIALOG_CANVAS:
			if (MainMIDlet.dialog!=null){
				MainMIDlet.dialog.init();
				Thread dialogTh=new Thread(MainMIDlet.dialog);
				dialogTh.start();
				Display.getDisplay(mainMIDlet).setCurrent(MainMIDlet.dialog);
			}
			break;
		//切换到菜单Canvas
		case MENU_CANVAS:
			if (MainMIDlet.menu!=null){
				MainMIDlet.menu.init();
				Thread menuTh=new Thread(MainMIDlet.menu);
				menuTh.start();
				Display.getDisplay(mainMIDlet).setCurrent(MainMIDlet.menu);
			}
			break;
		//游戏退出
		case EXIT:
			mainMIDlet.notifyDestroyed();
			break;
		}
	}
}