platformcanvas.java

j2me联动菜单的开源代码

package com.ultrapower.canvas;

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

/**
 * Provides platform dependent settings for Sun WTK platform
 *
 * @author Greg Gridin
 */
abstract public class PlatformCanvas extends Canvas {

    static public final byte PLATFORM_BARTEO = 1;
    static public final byte PLATFORM_LG = 2;
    static public final byte PLATFORM_MOTOROLA = 3;
    static public final byte PLATFORM_MOTOROLA_V = 4;
    static public final byte PLATFORM_NOKIA = 5;
    static public final byte PLATFORM_NOKIA_30 = 6;
    static public final byte PLATFORM_SIEMENS = 7;
    static public final byte PLATFORM_SAMSUNG = 8;
    static public final byte PLATFORM_SONYERICSSON = 9;
    static public final byte PLATFORM_SUN_WTK = 10;

    static public final byte PLATFORM = PLATFORM_SUN_WTK;

    /**
     * The width in pixels of a screen
     */
    public static final int WIDTH;

    /**
     * The height in pixels of a screen
     */
    public static final int HEIGHT;

    /**
     * Indicated whether the phone has hardware support for double buffering for screen painting
     */
    public static final boolean DOUBLE_BUFFER = true;

    static {
        Canvas dummy = new Canvas() {
            public void paint(Graphics g) {
            }
        };
        WIDTH = dummy.getWidth();
        HEIGHT = dummy.getHeight();
        dummy = null;
    }

    /**
     * "No-key" key code
     */
    public static final int KEY_UNDEFINED = 0;

    /**
     * Key code for the UP game action.
     */
    public static final int KEY_UP = -1;

    /**
     * Key code for the LEFT game action.
     */
    public static final int KEY_LEFT = -3;

    /**
     * Key code for the RIGHT game action.
     */
    public static final int KEY_RIGHT = -4;

    /**
     * Key code for the DOWN game action.
     */
    public static final int KEY_DOWN = -2;

    /**
     * Key code for the FIRE game action.
     */
    public static final int KEY_FIRE = -5;

    /**
     * Key code for left soft key
     */
    public static final int KEY_SOFT_LEFT = -6;

    /**
     * Key code for right soft key
     */
    public static final int KEY_SOFT_RIGHT = -7;

    /**
     * Key code for PHONE_ON key (green button)
     */
    public static final int KEY_PHONE_ON = -10;

    /**
     * Key code for PHONE_OFF key (red button)
     */
    public static final int KEY_PHONE_OFF = -11;

    /**
     * Key code for CLEAR key
     */
    public static final int KEY_CLEAR = -8;

    /**
     * Key code for VOLUME UP key
     */
    public static final int KEY_VOLUME_UP = KEY_UNDEFINED;

    /**
     * Key code for VOLUME DOWN key
     */
    public static final int KEY_VOLUME_DOWN = KEY_UNDEFINED;

    /**
     * Key code for "fictitious" ENTER key
     * Some phones does not have FIRE button, we have to find out the replacement
     */
    public static final int KEY_ENTER = KEY_FIRE;

} // class PlatformCanvas