background.java

MMAE1.0开发者版源代码 用于扩展java me移动开发引擎,这是1.0版的源码.

/**
*游戏精灵类
*@CopyRight:Move2008
*@Author:bedlang
*@Version 1.0 2003/10/13
*/

package mmae.game;

import javax.microedition.lcdui.*;

public class BackGround extends mmae.ui.Base
{
   	public static final int UP = 0;
   	public static final int DOWN = 1;
   	public static final int LEFT = 2;
   	public static final int RIGHT = 3;

	public int offSetV,offSetH;
	private Image[] imgArray;
	private int way;
	private int oldWay;
	private boolean is360D;
   	private int imgWidth,imgHeight;
   	public int step=1;
   	private boolean auto = true;

	public BackGround(Image[] images, int Left, int Top, int Width, int Height)
	{
		setRect(Left,Top,Width,Height);
		
		imgArray = images;
		
		for(int i=0;i<imgArray.length;i++)
			imgWidth += imgArray[i].getWidth();
    	imgHeight = imgArray[0].getHeight();
	    	
    	offSetH = offSetV = 0;
    	is360D = true;
    	way = oldWay = RIGHT;
	}
	
	public boolean isAuto()
	{
		return auto;
	}
	
	public void setAuto(boolean Auto)
	{
		auto = Auto;
	}
	
	public void set360(boolean Is360)
	{
		is360D = Is360;
	}
	
	public boolean is360()
	{
		return is360D;
	}
	
	public void setStep(int i)
	{
		if(i>=0) step = i;
	}
	
	public int getStep()
	{
		return step;
	}
	
	public void setWay(int Way)
	{
		if (way==2 || way==3) oldWay=way;
		way = Way;
	}
	
	public int getWay()
	{
		return way;
	}
	
	public void move()
	{	
		switch(way)
		{
			case UP://UP
				if( offSetH<0 ) 
					offSetH+=step;
				else
					if(oldWay==2 || oldWay==3)
						setWay(oldWay);
				break;
			case DOWN://DOWN
				if( offSetH-step>=height-imgHeight )
					offSetH-=step;
				else
					if(oldWay==2 || oldWay==3)
						setWay(oldWay);					
				break;
			case LEFT://LEFT
				if(is360D)
				{
					offSetV-=step;
					if( offSetV<(width-imgWidth) ) offSetV=width;								
				}
				else
					if( offSetV-step>width-imgWidth ) offSetV-=step;
				break;
			case RIGHT://RIGHT
				if(is360D)
				{
					offSetV+=step;
					if( offSetV>imgWidth) offSetV=0;					
				}
				else
					if( offSetV+step<0 ) offSetV+=step;
				break;
		}
	}
	
    public void draw(Graphics g)
    {
        int i1 = g.getClipX();
        int j1 = g.getClipY();
        int k1 = g.getClipWidth();
        int l1 = g.getClipHeight();
	   	
		g.setClip(left,top,width,height);
		
    	for(int i=0;i<=width/imgWidth+1;i++)
    	{
    	  for(int t=0;t<=height/imgHeight+1;t++)
    	  {
	    	int w=0;
    		for(int j=0;j<imgArray.length;j++)
    		{
	    		g.drawImage(imgArray[j],offSetV-i*imgWidth+left+w,offSetH+top+t*imgHeight,g.TOP|g.LEFT);
	    		w += imgArray[j].getWidth();
	    	}
	      }
    	}
    	
    	g.setClip(i1,j1,k1,l1);
    }
    
    public int getWidth()
    {
    	return imgWidth; 
    }
    
    public int getHeight()
    {
    	return imgHeight;
    }
  
	
}