m3g04
Class Main

java.lang.Object
  javax.microedition.midlet.MIDlet
      m3g04.Main

All Implemented Interfaces:

javax.microedition.lcdui.CommandListener

public class Main
extends javax.microedition.midlet.MIDlet
implements javax.microedition.lcdui.CommandListener

Application that runs the samples available in this chapter. The user can pick a sample from a list to start it and return to the selection screen when finished.

Author:

Claus Hoefele

Field Summary

private javax.microedition.lcdui.Command	backCommand Back command.
private Sample	currentSample Currently displayed sample.
private javax.microedition.lcdui.Command	exitCommand Exit command.
private static java.lang.String[][]	SAMPLES List of samples.
private javax.microedition.lcdui.List	selectionScreen Screen for selecting samples.

Constructor Summary

Main()
Constructor.

Method Summary

void	commandAction(javax.microedition.lcdui.Command command, javax.microedition.lcdui.Displayable displayable) Receives command actions from the selection screen as well as the samples.
void	destroyApp(boolean unconditional) Enters the destroyed state.
void	pauseApp() Enters the paused state.
void	startApp() Enters the active state.
private void	switchSample(Sample newSample) Destroys the current sample if it exists and displays a new one.

Methods inherited from class javax.microedition.midlet.MIDlet

checkPermission, getAppProperty, notifyDestroyed, notifyPaused, platformRequest, resumeRequest

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

SAMPLES

private static final java.lang.String[][] SAMPLES

List of samples. They will be displayed in the same order as defined here. The first string is the class name, the second the display name. A sample must implement the interface Sample and derive from Displayable.

selectionScreen

private javax.microedition.lcdui.List selectionScreen

Screen for selecting samples.

currentSample

private Sample currentSample

Currently displayed sample.

exitCommand

private javax.microedition.lcdui.Command exitCommand

Exit command.

backCommand

private javax.microedition.lcdui.Command backCommand

Back command.

Constructor Detail

Main

public Main()

Constructor.

Method Detail

startApp

public void startApp()

Enters the active state. Shows a list of samples that the user can select for execution.

Specified by:

startApp in class javax.microedition.midlet.MIDlet

pauseApp

public void pauseApp()

Enters the paused state.

Specified by:

pauseApp in class javax.microedition.midlet.MIDlet

destroyApp

public void destroyApp(boolean unconditional)

Enters the destroyed state.

Specified by:

destroyApp in class javax.microedition.midlet.MIDlet

Parameters:

unconditional - if true, MIDlet is required to exit unconditionally.

switchSample

private void switchSample(Sample newSample)

Destroys the current sample if it exists and displays a new one. Argument can be null to indicate that no new sample should be displayed.

Parameters:

newSample - new sample to display or null to simply destroy the current sample if it exists.

commandAction

public void commandAction(javax.microedition.lcdui.Command command,
                          javax.microedition.lcdui.Displayable displayable)

Receives command actions from the selection screen as well as the samples.

Specified by:

commandAction in interface javax.microedition.lcdui.CommandListener

Parameters:

command - command.

displayable - source of the command.