Key Canvas : 2D « J2ME « Java

Key Canvas

import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Font;
import javax.microedition.lcdui.Graphics;

public class KeyCanvas extends Canvas {
  private Font mFont;

  private String mMessage = "[Press keys]";

  public KeyCanvas() {
    mFont = Font.getFont(Font.FACE_PROPORTIONAL, Font.STYLE_PLAIN, Font.SIZE_MEDIUM);
  }

  public void paint(Graphics g) {
    int w = getWidth();
    int h = getHeight();

    // Clear the Canvas.
    g.setGrayScale(255);
    g.fillRect(0, 0, w - 1, h - 1);
    g.setGrayScale(0);
    g.drawRect(0, 0, w - 1, h - 1);

    g.setFont(mFont);

    int x = w / 2;
    int y = h / 2;

    g.drawString(mMessage, x, y, Graphics.BASELINE | Graphics.HCENTER);
  }

  protected void keyPressed(int keyCode) {
    int gameAction = getGameAction(keyCode);
    switch (gameAction) {
    case UP:
      mMessage = "UP";
      break;
    case DOWN:
      mMessage = "DOWN";
      break;
    case LEFT:
      mMessage = "LEFT";
      break;
    case RIGHT:
      mMessage = "RIGHT";
      break;
    case FIRE:
      mMessage = "FIRE";
      break;
    case GAME_A:
      mMessage = "GAME_A";
      break;
    case GAME_B:
      mMessage = "GAME_B";
      break;
    case GAME_C:
      mMessage = "GAME_C";
      break;
    case GAME_D:
      mMessage = "GAME_D";
      break;
    default:
      mMessage = "";
      break;
    }
    repaint();
  }
}

1.	Simple Midlet Demo
2.	Piano MIDlet
3.	Pacer
4.	Pointer Example
5.	Text Example
6.	Simple Canvas
7.	Illustrate Graphics MIDlet
8.	Translate Coordinates
9.	Box Text Canvas
10.	Offscreen MIDlet
11.	Quatsch MIDlet
12.	Sweep Game
13.	Sweep
14.	Text MIDlet
15.	Translate coordinate system
16.	Show various anchor points
17.	Draw mutable image on a canvas
18.	Canvas for processing key code and commands
19.	Draw immutable image on a canvas
20.	Use pointer events to draw onto the Canvas
21.	A quick sample of graphics, commands, and event handling.

Key Canvas : 2D « J2ME « Java

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