navigatecanvas.java

个很好的用来学习学习手机通信的例子

import javax.microedition.lcdui.*;

class NavigateCanvas extends Canvas {

    int width = 0;
    int height = 0;
	private Image image;
    private int   newX=0;
    private int   newY=0;

    public NavigateCanvas(Image image) {
        this.image=image;
        newX=0;
        newY=0;
    }

    public void steppingXY(int x, int y) {
            newX += x;
            newY += y;
    }

    public void paint(Graphics g) {
        width=this.getWidth();
        height=this.getHeight();

  	    g.setGrayScale(255);
	    g.fillRect(0,0,width-1,height-1);
	    g.setGrayScale(0);
        g.drawRect(0,0,width-1,height-1);

        g.translate(newX, newY);
        g.drawImage(image,0,0, g.TOP|g.LEFT);
    }
}