choosebgcanvas.java

J2EE的无线手机通讯运用软件

// ImageCanvas.java
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import java.util.Vector;
import java.io.IOException;

public class ChooseBgCanvas extends Canvas implements CommandListener
{
        public Font font=Font.getFont(0,1,8);
private int BgIndex=0;
private Command cCancel = new Command("cancel", Command.SCREEN, 1);
private Command cOK = new Command("ok", Command.OK, 1);

private Image bg1;
private Image bg2;
private Image bg3;



public ChooseBgCanvas () {
       try{
           bg1=Image.createImage("/BgImage1.png");
           bg2=Image.createImage("/BgImage2.png");
           bg3=Image.createImage("/BgImage3.png");


}catch(Exception e){}


}

protected void paint(Graphics g){
           g.setFont(font);
           g.setColor(255,255,255);

      g.drawImage(ImageTest.instance.BgImage[this.BgIndex], getWidth()/2,0, g.TOP|g.HCENTER);
      g.drawImage(bg1,0,0,g.TOP|g.LEFT);
      g.drawImage(bg2,75,0,g.TOP|g.LEFT);
      g.drawImage(bg3,0,75,g.TOP|g.LEFT);





      g.setColor(28,242,209);
      
      if (BgIndex == 0) 
      {
         g.drawRect(0,0,25,25) ;

      } 
      if (BgIndex == 1) 
     {
         g.drawRect(75,0,25,25) ;
      } 
      if (BgIndex == 2) 
     {
            g.drawRect(0,75,25,25) ;
      } 

}
private void previous() {
        if (BgIndex<3) {
           ++BgIndex;
        }
}
private void next() {
        if (BgIndex>0) {
            --BgIndex;
        }
}

protected void keyPressed(int keyCode)
{
       if(keyCode == getKeyCode(Canvas.UP))
       {
           next();
           repaint();
        }
      else if(keyCode == getKeyCode(Canvas.DOWN))
      {
          previous();
          repaint();
      }
      else if (keyCode == getKeyCode(Canvas.FIRE)){
      	ImageTest.instance.BgIndex = this.BgIndex;
      	repaint();
      }
   
}
protected void keyRepeated(int keyCode) {
     keyPressed(keyCode);
}
public void SetBg(int BgIndex){
      this.BgIndex=BgIndex;
}
public int GetBg(){
      return BgIndex;
}


public void commandAction(Command c, Displayable d) {
if (c == cCancel) {
Display.getDisplay(ImageTest.instance).setCurrent(this);
} else if (c == cOK) {
Display.getDisplay(ImageTest.instance).setCurrent(this);
}
}

}