javaMe开发菜单组件

package test;

import java.io.IOException;

import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Font;
import javax.microedition.lcdui.Graphics;

public class Menu extends Canvas{
 
 private Displayable parentDisplay=null;   
 
 private String LeftMenuTitle="选项";
 private String RightMenuTitle="取消";
 
 private byte left_right=0;
 private byte up_down=0;
 
 private int menuBarBgColor=0XBCBCBC;
 private int menuBarFgColor=0; 
 private Font  menuBarFont=Font.getFont(Font.FACE_SYSTEM, Font.STYLE_PLAIN, Font.SIZE_SMALL); 

 private String[]radiuoButtonName=null;
 
 private byte indexSelected=0;//选中
 private byte indexFource=0;//焦点
 private byte  maxFource=0;

 private boolean isShowMenu=false;
 
 public Menu(){  
 }
 
  protected void drawRGB(Graphics g) {    
         int ai[] = new int[this.getWidth()];
         for (int j1 = 0; j1 < ai.length; j1++)
             ai[j1] = 0x90000000;
         g.drawRGB(ai, 0, 0, 0, 0,this.getWidth(),this.getHeight(), true); // 绘制透明景色
  } 
 
  
  protected final void paint(Graphics arg0) { 
  
   painMenuBar(arg0);  
   if(isShowMenu)
    paintContent(arg0);
  
 }
 
  private void painMenuBar(Graphics arg0){ 
  // arg0.setColor(255,255, 255);
  // arg0.fillRect(0,0,this.getWidth(), this.getHeight()-20);
   arg0.setColor(menuBarBgColor);   
   arg0.fillRect(0,this.getHeight()-20,this.getWidth(),20);  
   arg0.setColor(menuBarFgColor);
   arg0.setFont(menuBarFont);  
   arg0.drawString(LeftMenuTitle,5,this.getHeight()-10-menuBarFont.getHeight()/2,0);
   arg0.drawString(RightMenuTitle,this.getWidth()-menuBarFont.stringWidth(RightMenuTitle),this.getHeight()-20+(20-menuBarFont.getHeight())/2,0);
  }
  private int MenuHight=120;
  private int MenuWidth=100;
 
  private int MenuBgColor=0X3eFeB;
 private void paintContent(Graphics arg0){
  
  arg0.setColor(MenuBgColor);  
  arg0.fillRect(0,this.getHeight()-20-MenuHight,MenuWidth+4,MenuHight);   
  for(int i=0;i<radiuoButtonName.length;i++){   
       if(i==indexFource){
    arg0.setColor(0X1035);
    arg0.fillRect(2,this.getHeight()-20-(menuBarFont.getHeight()+menuBarFont.getHeight()*i),MenuWidth, menuBarFont.getHeight()) ;
   }   
    arg0.setColor(0XBBBBB);
   arg0.drawString(radiuoButtonName[i],3,this.getHeight()-20-menuBarFont.getHeight()*(i+1),0);
  }  

 } 
 private Display display=null;//窗口容器
    public void add(Display display){
     this.display=display;
    }
 protected void keyPressed(int keyCode) { 
  if(keyCode==-2){
   
   if(++indexFource>maxFource-1) 
    indexFource=0;
  }
  else if(keyCode==-1){
   if(--indexFource<0)
    indexFource=(byte) (maxFource-1);
  }
  else if(keyCode==-5){
   
  }
  else if(keyCode==-6)
   isShowMenu=true;
  else if(keyCode==-7){
   isShowMenu=false;
   setVisible(false);
  }
  repaint();
 }

   public void add(String[] buttonName){   
  radiuoButtonName=buttonName;
  maxFource+=radiuoButtonName.length;  
 } 
 public void setMenuBarBgColor(int titleBgColor){
  this.menuBarBgColor=titleBgColor;
  repaint();
 }
 public void setMenuBarFont(Font font){//设置字体
  menuBarFont=font;  
  repaint();
 }
 
 public void setVisible(boolean isVisible){  
    //  this.setFullScreenMode(true);
      if(isVisible){     
       parentDisplay=display.getCurrent();
       display.setCurrent(this);      
      }
      else{     
     display.setCurrent(parentDisplay);       
      }
    }
 public String getLeftMenuTitle() {
  return LeftMenuTitle;
 }

 public void setLeftMenuTitle(String leftMenuTitle) {
  LeftMenuTitle = leftMenuTitle;
 }

 public String getRightMenuTitle() {
  return RightMenuTitle;
 }

 public void setRightMenuTitle(String rightMenuTitle) {
  RightMenuTitle = rightMenuTitle;
 }
}