platformcanvas.universal

j2me下的1套UI框架.包含j2me开发中会应用的各种低级组件

package com.jmobilecore.ui.core;

import javax.microedition.lcdui.*;

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

    /**
     * This class is created specifically for LG phones, which does not provide
     * key press codes for soft buttons in Canvas
     * This class imitates pressing of soft button key when corresponding command is received
     */
    class LGSoftKeyListener implements CommandListener {

        private Command leftCommand;
        private Command rightCommand;

        /**
         * Constructs new <code>LGSoftKeyListener</code> instance.
         *
         * @param leftCommand  - Command for the left soft key
         * @param rightCommand - Command for the right soft key
         */
        public LGSoftKeyListener(Command leftCommand, Command rightCommand) {

            this.leftCommand = leftCommand;
            this.rightCommand = rightCommand;
        }

        /**
         * Imitates key press when correspondent command is received
         *
         * @param command - command event
         * @param display - displayable object
         */
        public void commandAction(Command command, Displayable display) {

            if (display == null || command == null) return;

            if (leftCommand != null && leftCommand.equals(command) && display instanceof ScreenCanvas) {
                ((ScreenCanvas) display).keyPressed(PlatformCanvas.KEY_SOFT_LEFT);
                return;
            }
            if (rightCommand != null && rightCommand.equals(command) && display instanceof ScreenCanvas) {
                ((ScreenCanvas) display).keyPressed(PlatformCanvas.KEY_SOFT_RIGHT);
                return;
            }
        }
    }  // class LGSoftKeyListener

    /**
     * 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;
    }

    static public final byte BARTEO = 1;
    static public final byte LG = 2;
    static public final byte MOTOROLA_IDEN = 3;
    static public final byte MOTOROLA_V = 4;
    static public final byte NOKIA = 5;
    static public final byte NOKIA_30 = 6;
    static public final byte SIEMENS = 7;
    static public final byte SAMSUNG = 8;
    static public final byte SONY_ERICSSON = 9;
    static public final byte SUN_WTK = 10;

    static public byte PLATFORM = SUN_WTK;

    public PlatformCanvas() {

        if (PLATFORM == LG || PLATFORM == SAMSUNG) {
            Command leftCommand = new Command("", Command.CANCEL, 1);
            Command rightCommand = new Command("", Command.OK, 1);
            addCommand(leftCommand);
            addCommand(rightCommand);
            setCommandListener(new LGSoftKeyListener(leftCommand, rightCommand));
        }
    }

    public static void setPlatform(byte platform) {

        KEY_UP = -1;
        KEY_LEFT = -3;
        KEY_RIGHT = -4;
        KEY_DOWN = -2;
        KEY_FIRE = -5;
        KEY_SOFT_LEFT = -6;
        KEY_SOFT_RIGHT = -7;
        KEY_PHONE_ON = -10;
        KEY_PHONE_OFF = -11;
        KEY_CLEAR = -8;
        KEY_STAR = Canvas.KEY_STAR;
        KEY_POUND = Canvas.KEY_POUND;
        KEY_VOLUME_UP = KEY_UNDEFINED;
        KEY_VOLUME_DOWN = KEY_UNDEFINED;
        KEY_ENTER = KEY_FIRE;

        PLATFORM = platform;
        switch (platform) {
            case BARTEO:
                KEY_UP = 38;
                KEY_LEFT = 37;
                KEY_RIGHT = 39;
                KEY_DOWN = 40;
                KEY_FIRE = 10;
                KEY_STAR = 106;
                KEY_POUND = 31;
                break;
            case LG_SAMSUNG:
                break;
            case MOTOROLA_IDEN:
                KEY_UP = -10;
                KEY_LEFT = -13;
                KEY_RIGHT = -12;
                KEY_DOWN = -11;
                KEY_FIRE = -22;
                KEY_SOFT_LEFT = -20;
                KEY_SOFT_RIGHT = -21;
                KEY_PHONE_ON = -14;
                KEY_PHONE_OFF = KEY_UNDEFINED;
                KEY_CLEAR = KEY_UNDEFINED;
                KEY_SPEAKER = -53;
                KEY_VOLUME_UP = -51;
                KEY_VOLUME_DOWN = -52;
                KEY_PTT = -50;
                KEY_ENTER = KEY_PHONE_ON;
                break;
            case MOTOROLA_V:
                KEY_UP = 1;
                KEY_LEFT = 2;
                KEY_RIGHT = 5;
                KEY_DOWN = 6;
                KEY_FIRE = 20;
                KEY_SOFT_LEFT = 21;
                KEY_SOFT_RIGHT = 22;
                KEY_PHONE_OFF = KEY_UNDEFINED;
                KEY_MENU = 23;
                KEY_CLEAR = KEY_UNDEFINED;
                KEY_ENTER = KEY_FIRE;
                break;
            case NOKIA:
                break;
            case NOKIA_30:
                KEY_ENTER = KEY_PHONE_ON;
                break;
            case SIEMENS:
                KEY_UP = -59;
                KEY_LEFT = -61;
                KEY_RIGHT = -62;
                KEY_DOWN = -60;
                KEY_SOFT_LEFT = -1;
                KEY_SOFT_RIGHT = -4;
                KEY_PHONE_ON = -11;
                KEY_PHONE_OFF = -12;
                KEY_CLEAR = KEY_UNDEFINED;
                KEY_ENTER = KEY_PHONE_ON;
                break;
            case SONY_ERICSSON:
                KEY_PHONE_ON = KEY_UNDEFINED;
                KEY_PHONE_OFF = KEY_UNDEFINED;
                KEY_VOLUME_UP = UP;
                KEY_VOLUME_DOWN = DOWN;
                KEY_BACK = -11;
                break;
        }
    }

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

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

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

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

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

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

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

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

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

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

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

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

    /**
     * Key code for VOLUME DOWN key
     */
    public static 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 int KEY_ENTER = KEY_FIRE;

    /**
     * Key code for STAR key
     */
    public static int KEY_STAR = 35;

    /**
     * Key code for POUND key
     */
    public static int KEY_POUND = 42;

    /**
     * Key code for SPEAKER key
     */
    public static int KEY_SPEAKER = KEY_UNDEFINED;

    /**
     * Key code for PTT key
     */
    public static int KEY_PTT = KEY_UNDEFINED;

    /**
     * Key code for PTT key
     */
    public static int KEY_MENU = KEY_UNDEFINED;

    /**
     * Key code for BACK key
     */
    public static int KEY_BACK = KEY_UNDEFINED;
} // class PlatformCanvas