covercanvas.java

《神州》RPG游戏引擎

import java.util.*;

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

//import com.nokia.mid.ui.FullCanvas;

public class CoverCanvas extends GameCanvas implements Runnable
{
    private Display disp;
    private Displayable last;

    Graphics g;
    boolean isPlay;
    int delay;
    int width;
    int height;
    boolean isDrawing;
    private Image coverImg,menubk;
    private String[] menuStr;
    private int menuX;
    private int[] menuY;
    private int menuIndex;
    private boolean haveStartGame;


    int windowX,windowY; //可见视窗左上角坐标

    int runStatus;

    
    static final int LEFT_PRESSED=0x0004;
    static final int RIGHT_PRESSED=0x0020;
    static final int UP_PRESSED=0x0002;
    static final int DOWN_PRESSED=0x0040;
    

 

    public CoverCanvas(String title,Display disp,Displayable last)
    {
        super(false);
        this.disp = disp;
        this.last = last;
        this.setFullScreenMode(true);

        init();
    }
    public void init()
    {        
        this.g = getGraphics();
        delay = 1000/60;  //1秒500祯
        width = this.getWidth();
        height = this.getHeight();       
        
        
        if(width>=176)
        {
            if(height<208)
            {
                height=208;
            }
        }
        coverImg=Tools.getImage("/pic/cover.png");
        menubk=Tools.getImage("/pic/menubk.png");
        menuStr=new String[]{"开始游戏","故事背景","开发团队","退　　出"};
        menuX=176-((menubk.getWidth()-Style.font.stringWidth("开始游戏"))/2+Style.font.stringWidth("开始游戏")+5);
        int padding=4;
        int menuHeight=Style.font.getHeight()*menuStr.length+padding*(menuStr.length-1)+12;
        int menuTop=0;
        if(height<=220)
        {
            menuTop=height-menuHeight;    
        }
        else
        {
            menuTop=220-menuHeight; 
        }
        
        menuY=new int[menuStr.length];
        for(int i=0;i<menuStr.length;i++)
        {
            menuY[i]=menuTop+(Style.font.getHeight()+padding)*i;
        }
        menuIndex=0;
    }

    boolean ThreadRunning;

    public void start()
    {
        isPlay = true;
        if(!ThreadRunning)
        {
            (new Thread(this)).start();
            ThreadRunning=true;
        }

    }
    public void stop()
    {
        isPlay=false;
    }


    public void run()
    {
        while(isPlay)
        {
            redrawAll();            
            
            try {
                Thread.sleep(delay);
                //wait(delay);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            
        }
        ThreadRunning = false;
    }
    
    public void redrawAll()
    {
        if(!isDrawing)
        {
            isDrawing = true;
            
            g.drawImage(coverImg,0,0,Style.LT);
            g.drawImage(menubk,menuX-(menubk.getWidth()-Style.font.stringWidth("开始游戏"))/2,menuY[menuIndex]-(menubk.getHeight()-Style.font.getHeight())/2,Style.LT);
            g.setFont(Style.font);
            for(int i=0;i<menuStr.length;i++)
            {
                if(menuIndex==i)
                    g.setColor(0x000000);
                else
                    g.setColor(0xFFFFFF);
                g.drawString(menuStr[i],menuX,menuY[i],Style.LT);                
            }

            
            flushGraphics();
            isDrawing=false;
        }
    }

    protected void keyRepeated(int keyCode)
    {

    }
    protected void keyPressed(int keyCode)
    {
        int gameAction = KeyMapping.getGameKey(keyCode);

        if(gameAction == Canvas.UP)
        {
            if(menuIndex>0)menuIndex--;
        }else
        if(gameAction == Canvas.DOWN)
        {
            if(menuIndex<menuStr.length-1)menuIndex++;
        }else
        if(gameAction == Canvas.FIRE)
        {
            if(menuIndex==0)
            {
                //开始游戏
                if(!haveStartGame)
                {
                    stop();
                    GameMIDlet.midlet.startGame();
                    haveStartGame=true;
                }
            }else           
            if(menuIndex==1)
            {
                //故事背景
            }else
            if(menuIndex==2)
            {
                //开发团队
            	DeveloperCanvas developerCanvas = new DeveloperCanvas("Developer",disp,this);
            	developerCanvas.start();
            	disp.setCurrent(developerCanvas);
            }else
            if(menuIndex==3)
            {
                //退出
                try {
                    GameMIDlet.midlet.destroyApp(true);
                } catch (MIDletStateChangeException e) {
                    e.printStackTrace();
                }
            }
                
        }
    }    
}