hintcanvas.java

Java ME手机应用开发大全一书的配套光盘上的源码

package picturepuzzle;
import javax.microedition.lcdui.*;

/**
 * 显示屏图原始图片的类
 */
public class HintCanvas extends Canvas {
    
    private Image image;
    private int posX , posY;
    private int cWidth, cHeight;
    
    public HintCanvas(Image image) {
        super();
        this.image = image;
        cWidth = getWidth();
        cHeight = getHeight();
        posX = (cWidth - image.getWidth())/2;
        posY = (cHeight - image.getHeight())/2;
    }
    
    public void paint(Graphics g) {
        g.setColor(255 , 255 , 255);//paint a white background
        g.fillRect(0 , 0 , cWidth , cHeight);
        g.drawImage(image , posX , posY , Graphics.TOP | Graphics.LEFT);
        g.setColor(0 , 0 , 255);//paint text in blue
        g.setFont(Font.getFont(Font.FACE_MONOSPACE , Font.STYLE_BOLD , Font.SIZE_SMALL));
        g.drawString("Original Image" , getWidth() / 2 , 0 , Graphics.HCENTER | Graphics.TOP);
    }
    
}