closeablecanvas.java

一个关于沉船的J2ME小游戏

//
// Copyright 2002 Nokia Corporation
//
// THIS SOURCE CODE IS PROVIDED 'AS IS', WITH NO WARRANTIES WHATSOEVER,
// EXPRESS OR IMPLIED, INCLUDING ANY WARRANTY OF MERCHANTABILITY, FITNESS
// FOR ANY PARTICULAR PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE
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// OF ANY PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OWNED OR CONTROLLED
// BY THIRD PARTIES
//
// Furthermore, information provided in this source code is preliminary,
// and may be changed substantially prior to final release. Nokia Mobile
// Phones Ltd. retains the right to make changes to this source code at
// any time, without notice. This source code is provided for informational
// purposes only.
//
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// Sun Microsystems Inc.
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// A non-exclusive, non-transferable, worldwide, limited license is hereby
// granted to the Licensee to download, print, reproduce and modify the
// source code. The licensee has the right to market, sell, distribute and
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//


import javax.microedition.lcdui.*;


// This class is based on the standard MIDP class Canvas.
// It uses a 'delegate' to handle key presses, releases
// and paint logic.

class CloseableCanvas
    extends Canvas
    implements CommandListener, SettableDelegate
{
    private GameManager delegate = null;


    CloseableCanvas(String closeLabel)
    {
        // Our parent must call the setDelegate method
        // after calling the constructor.

        addCommand(new Command(closeLabel, Command.BACK, 1)); // close
        setCommandListener(this);
    }


    // SettableDelegate

    public void setDelegate(GameManager delegate)
    {
        this.delegate = delegate;
    }


    // Canvas methods

    public void hideNotify()
    {
        delegate.pause();
    }


    public void keyPressed(int keyCode)
    {
        delegate.keyPressed(keyCode);
    }


    public void keyReleased(int keyCode)
    {
        delegate.keyReleased(keyCode);
    }


    public void paint(Graphics g)
    {
        delegate.paint(g);
    }


    // CommandListener method

    public void commandAction(Command c, Displayable d)
    {
        // The application code only adds a 'close' command.
        delegate.closePressed();
    }
}