bouncingtextmidlet.java

J2ME MIDP_Example_Applications

// Copyright 2002 Nokia Corporation.
//
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// 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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// BY THIRD PARTIES
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// Furthermore, information provided in this source code is preliminary,
// and may be changed substantially prior to final release. Nokia Corporation
// 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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// Corporation.
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// Sun Microsystems, Inc.
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//
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package example.hello;

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;


public class BouncingTextMIDlet
    extends MIDlet
{
    private final TextInputScreen textInputScreen;
    private BouncingTextCanvas bouncingTextCanvas = null;


    public BouncingTextMIDlet()
    {
        String str = getAppProperty("BouncingText-InitString");
        if (str == null)
        {
            str = "Hello World."; // default
        }
        textInputScreen = new TextInputScreen(this, str);
    }


    public void startApp()
    {
        Displayable current = Display.getDisplay(this).getCurrent();
        if (current == null)
        {
            Display.getDisplay(this).setCurrent(textInputScreen);
        }
        else
        {
            Display.getDisplay(this).setCurrent(current);
            if (current == bouncingTextCanvas)
            {
               // restart animation after pauseApp
               bouncingTextCanvas.startAnimation();
            }
        }
    }


    public void pauseApp()
    {
        if (bouncingTextCanvas != null)
        {
            bouncingTextCanvas.stopAnimation();
        }
    }


    public void destroyApp(boolean b)
    {
        if (bouncingTextCanvas != null)
        {
            bouncingTextCanvas.stopAnimation();
        }
    }


    // A convenience method for exiting
    void exitRequested()
    {
        destroyApp(false);
        notifyDestroyed();
    }


    // Handle the display transition from the initial
    // 'TextInputScreen' state to a 'BouncingTextCanvas' state
    void textInputScreenDone(String str)
    {
        bouncingTextCanvas =
           new BouncingTextCanvas(this, Display.getDisplay(this), str);
        bouncingTextCanvas.startAnimation();

        Display.getDisplay(this).setCurrent(bouncingTextCanvas);
    }
}