sscanvas.java

J2ME手机游戏编程入门源码 16事例源码 可用手机顽童软件测试

import javax.microedition.lcdui.*;
import java.io.*;

public class SSCanvas extends Canvas {
  private Display display;
  private Image[] slides;
  private String[] captions = { "Love Circle Bowl", "Double Wide Spine",
                                "Flume Zoom Over-vert", "Kulp De Sac Bowl",
                                "Louie's Ledge" };
  private int curSlide = 0;
  
  public SSCanvas(Display d) {
    super();
    display = d;

    // Load the slide images
    try {
      slides = new Image[5];
      slides[0] = Image.createImage("/LoveCircle.jpg");
      slides[1] = Image.createImage("/DoubleWide.jpg");
      slides[2] = Image.createImage("/FlumeZoom.jpg");
      slides[3] = Image.createImage("/KulpDeSac.jpg");
      slides[4] = Image.createImage("/LouiesLedge.jpg");
    }
    catch (IOException e) {
      System.err.println("Failed loading images!");
    }
  }

  void start() {
    display.setCurrent(this);
    repaint();
  }

  public void keyPressed(int keyCode) {
    // Get the game action from the key code
    int action = getGameAction(keyCode);

    // Process the left and right buttons
    switch (action) {
      case LEFT:
        if (--curSlide < 0)
          curSlide = slides.length - 1;
        repaint();
        break;

      case RIGHT:
        if (++curSlide >= slides.length)
          curSlide = 0;
        repaint();
        break;
      }
  }

  public void paint(Graphics g) {
    // Clear the display
    g.setColor(255, 255, 255);  // White
    g.fillRect(0, 0, getWidth(), getHeight());

    // Draw the current image
    g.drawImage(slides[curSlide], getWidth() / 2, getHeight() / 2,
      Graphics.HCENTER | Graphics.VCENTER);

    // Set the font for the caption
    Font f = Font.getFont(Font.FACE_PROPORTIONAL, Font.STYLE_BOLD, Font.SIZE_MEDIUM);
    g.setFont(f);

    // Draw the current caption
    g.setColor(0, 0, 0);        // Black
    g.drawString(captions[curSlide], getWidth() / 2, 0,
      Graphics.HCENTER | Graphics.TOP);
  }
}