bqtickerbar.java

J2me唆哈的代码

/*
 * Created on 2005-9-20 by pcy
 *
 * TODO To change the template for this generated file go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
package a.a.a.midp.lcdui;

import java.util.Timer;
import java.util.TimerTask;

import javax.swing.JPanel;
import java.awt.*;

public class BQTickerBar extends JPanel {
    public static final long serialVersionUID=1;
    
    static final int TICK_RATE = 250;
    
    private Timer timer;
    private BQTicker ticker;
    private String tickerString;
    private Color bkColor;
    private int x;
    private int y;
    private int width;
    private int height;
    private int tickSpeed;
    private int tickWidth;
    boolean hasTicker;
    
    Stroke stroke;
    public BQTickerBar() {
        super();
        float[] dashP = new float[1];
        dashP[0] = 2;
        stroke=new BasicStroke(1.0F,
                BasicStroke.CAP_BUTT, BasicStroke.JOIN_MITER, 1.0F, dashP,
                0);
        dashP=null;
        bkColor=new Color(255,255,255);
        y=3;
        
    }
    
    public BQTicker getTicker(){
        return ticker;
    }
    
    public void setTicker(BQTicker ticker){
        this.ticker=ticker;
        if(ticker==null){
            hasTicker=false;
            return;
        }else{
            x=0;
            hasTicker=true;
            if(timer==null){
                timer=new Timer();
                timer.schedule(new TimerTask(){
                    public void run(){
                        x=(x<=-tickWidth)?width:x-tickSpeed;
                        repaint();
                    }
                }, TICK_RATE);
            }
            tickerString=ticker.getString();
            tickSpeed=ticker.getTickSpeed();
            tickWidth=ticker.getTickWidth();
            width=this.getWidth();
            height=this.getHeight();
        }
    }

    public void resizeScreen(){
    	
    }
    
    protected void paintComponent(Graphics graph){
        if(hasTicker){
            graph.setColor(bkColor);
            graph.fillRect(0,0,width,height);
            graph.drawString(tickerString,x,y);
            Stroke s=((Graphics2D) graph).getStroke();
            ((Graphics2D) graph).setStroke(stroke);
            graph.drawLine(0,0,width,0);
            graph.drawLine(0,height,width,height);
            ((Graphics2D) graph).setStroke(s);
        }
    }

}