nokiacloseablecanvas.java

来自「一个关于沉船的J2ME小游戏」· Java 代码 · 共 108 行

//
// 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
// OR TRADE PRACTICE, RELATING TO THE SOURCE CODE OR ANY WARRANTY OTHERWISE
// ARISING OUT OF ANY PROPOSAL, SPECIFICATION, OR SAMPLE AND WITH NO
// OBLIGATION OF NOKIA TO PROVIDE THE LICENSEE WITH ANY MAINTENANCE OR
// SUPPORT. FURTHERMORE, NOKIA MAKES NO WARRANTY THAT EXERCISE OF THE
// RIGHTS GRANTED HEREUNDER DOES NOT INFRINGE OR MAY NOT CAUSE INFRINGEMENT
// 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.
//
// Third-party brands and names are the property of their respective
// owners. Java(TM) and J2ME(TM) are registered trademarks of
// Sun Microsystems Inc.
//
// 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
// make available the source code in original or modified form only when
// incorporated into the programs developed by the Licensee. No other
// license, express or implied, by estoppel or otherwise, to any other
// intellectual property rights is granted herein.
//


import java.util.Vector;
import javax.microedition.lcdui.*;

import com.nokia.mid.ui.FullCanvas;


// This class is based on the vendor-specific class FullCanvas.
// It uses a delegate to handle key presses, releases and paint
// logic.

class NokiaCloseableCanvas
    extends FullCanvas
    implements SettableDelegate
{
    private GameManager delegate = null;


    NokiaCloseableCanvas()
    {
        // Our parent must separately call the setDelegate method
        // after calling the constructor.
    }


    // SettableDelegate

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


    // Canvas methods

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

    public void keyPressed(int keyCode)
    {
        if ((keyCode == KEY_SOFTKEY1) || (keyCode == KEY_SOFTKEY2) ||
            (keyCode == KEY_SOFTKEY3))
        {
            // Any FullCanvas softkey press is interpreted as
            // a close request.
            delegate.closePressed();
        }
        else
        {
            delegate.keyPressed(keyCode);
        }
    }


    public void keyReleased(int keyCode)
    {
        // The delegate only handles standard MIDP Canvas key code
        // release events. It does not (and should not)
        // handle FullCanvas softkey release events.

        if ((keyCode != KEY_SOFTKEY1) && (keyCode != KEY_SOFTKEY2) &&
            (keyCode != KEY_SOFTKEY3))
        {
            delegate.keyReleased(keyCode);
        }
    }


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