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

public class Midlet extends MIDlet implements CommandListener {
   private Display display;//显示对象的引用
   Command okCommand;
   Command exitCommand;
   int viewType;
   List list;
   canvasDraw canvasdraw;
   public Midlet() {
      canvasdraw=new canvasDraw();
      display=Display.getDisplay(this);
okCommand=new Command("确认",Command.OK,2);
exitCommand=new Command("离开",Command.EXIT,2);
list=new List("线条几何形状绘制清单",List.IMPLICIT);
list.addCommand(okCommand);
list.addCommand(exitCommand);
list.append("绘制线条",null);
list.append("绘制矩形",null);
list.append("绘制圆角矩形",null);
list.append("绘制弧形",null);
list.append("绘制三角形",null);
list.append("绘制文本",null);
list.append("绘制图象",null);
list.addCommand(okCommand);
list.addCommand(exitCommand);
list.setCommandListener(this);
}
   protected void startApp() {

      display.setCurrent(list);
}
   public void pauseApp(){}
   public void destroyApp(boolean unconditional){}
   public void commandAction(Command cmd,Displayable disp){
   viewType=list.getSelectedIndex();
   if(cmd==okCommand)
   {
display.setCurrent(canvasdraw);
   }
   else if(cmd==exitCommand){
   destroyApp(false);
   }
   }
class canvasDraw extends Canvas implements CommandListener{
int action=0;
Image handImage;
int changeSD=1;
int changeFull=0;
Command backCommand;
public canvasDraw(){
try{
handImage=Image.createImage("/hand.png");
}catch(Exception ex){}
backCommand=new Command("返回",Command.BACK,1);
addCommand(backCommand);
setCommandListener(this);
}

public void paint(Graphics g)
{
g.setColor(0xffffff);
g.fillRect(0,0,getWidth(),getHeight());
g.setColor(0);
if(viewType==0){
g.setColor(0x000000);
g.drawLine(10,10,getWidth() -20,10);
g.setColor(0xcdab00);
g.setStrokeStyle(Graphics.DOTTED);
g.drawLine(10,50,getWidth() -20,50);
}
if(viewType==1){
g.setColor(0xff0000 );
g.drawRect(10,25,getWidth() - 20,20);
g.setColor(0xffff00);
g.fillRect(11,26,getWidth() - 22,18);
g.setColor(0xff0000 );
g.drawRect(10,65,getWidth() - 20,20);
g.setColor(0xffff00);
g.fillRect(11,96,getWidth() - 22,18);

}
else if(viewType==2){
g.setColor(0x0000ff);
g.drawRoundRect(10,50,getWidth() -20,40,20,20);
g.setColor(0x00ffff);
g.fillRoundRect(10,100,getWidth() - 20,40,20,20 );

}
else if(viewType==3)
{
g.setColor(0xff0000);
g.drawArc(getWidth() / 2 - getWidth() / 8 ,
getHeight() / 2 - getWidth() / 8,
getWidth() / 4 , getWidth() /4 ,
0,360);
g.setColor(0x00ff00);
g.fillArc(40,40,40,40,0,270 );

}
else if(viewType==4)
{
g.setColor(0x00ff00);
g.fillTriangle(40,40,100,40,60,100);
}
else if(viewType==5)
{
g.drawString("做好拉",150,
150,Graphics.HCENTER|Graphics.TOP);
}
else if(viewType==6)
{
g.drawImage(handImage,
0, 0, Graphics.LEFT |Graphics.TOP );
}
}
public void commandAction(Command cmd,Displayable disp)
{
if(cmd==backCommand)
display.setCurrent(list);
}
}
}