/*

* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:

*

*/

package javax.microedition.lcdui.game;

import javax.microedition.lcdui.Graphics;

import com.nokia.mj.impl.nokialcdui.LCDUIInvoker;

/**

 * GameCanvas class.

 */

public abstract class GameCanvas extends javax.microedition.lcdui.Canvas

{

    /**

     * Bit representing UP key. (1 << Canvas.UP)

     */

    public static final int UP_PRESSED = 0x0002;

    /**

     * Bit representing DOWN key. (1 << Canvas.DOWN)

     */

    public static final int DOWN_PRESSED = 0x0040;

    /**

     * Bit representing LEFT key. (1 << Canvas.LEFT)

     */

    public static final int LEFT_PRESSED = 0x0004;

    /**

     * Bit representing RIGHT key. (1 << Canvas.RIGHT)

     */

    public static final int RIGHT_PRESSED = 0x0020;

    /**

     * Bit representing FIRE key. (1 << Canvas.FIRE)

     */

    public static final int FIRE_PRESSED = 0x0100;

    /**

     * Bit representing GAME_A key. (1 << Canvas.GAME_A)

     */

    public static final int GAME_A_PRESSED = 0x0200;

    /**

     * Bit representing GAME_B key. (1 << Canvas.GAME_B)

     */

    public static final int GAME_B_PRESSED = 0x0400;

    /**

     * Bit representing GAME_C key. (1 << Canvas.GAME_C)

     */

    public static final int GAME_C_PRESSED = 0x0800;

    /**

     * Bit representing GAME_D key. (1 << Canvas.GAME_D)

     */

    public static final int GAME_D_PRESSED = 0x1000;

    /**

     * Constructor.

     *

     * @param suppressKeyEvents supress game key events.

     */

    protected GameCanvas(boolean suppressKeyEvents)

    {

        super();

        LCDUIInvoker.initGameCanvas(this, suppressKeyEvents);

    }

    /**

     * Get frameBuffer's Graphics object.

     *

     * @return frameBuffer's Graphics

     */

    protected Graphics getGraphics()

    {

        return (Graphics) LCDUIInvoker.getGraphics(this);

    }

    /**

     * Get game key states.

     *

     * @return game key states

     */

    public int getKeyStates()

    {

        return LCDUIInvoker.getKeyStates(this);

    }

    /**

     * By default this renders the frameBuffer at (0,0).

     *

     * @param g Graphics object

     */

    public void paint(javax.microedition.lcdui.Graphics g)

    {

        // If the Graphics doesn't belong to the frame buffer

        LCDUIInvoker.renderGraphics(this, g);

    }

    /**

     * Flushes the frameBuffer's region to the display.

     *

     * @param x clip X

     * @param y clip Y

     * @param w clip width

     * @param h clip height

     */

    public void flushGraphics(int x, int y, int w, int h)

    {

        if(w > 0 && h > 0)

        {

            LCDUIInvoker.flushGraphics(this, x, y, w, h);

        }

    }

    /**

     * Flushes the frameBuffer to the display.

     */

    public void flushGraphics()

    {

        LCDUIInvoker.flushGraphics(this, 0, 0, getWidth(), getHeight());

    }

}