selectvoice.java

Creating a Voice Synthesizer Application

/*
Import required swing classes
*/
import javax.swing.JRadioButton;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.ButtonGroup;
import javax.swing.JOptionPane;
import javax.swing.event.*;
/*
Import required awt classes
*/
import java.awt.Font;
import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
/*
Import required util classes
*/
import java.util.Enumeration;
import java.util.Locale;
import java.util.Hashtable;
/*
Import resquired speech classes
*/
import javax.speech.Central;
import javax.speech.Engine;
import javax.speech.EngineList;
import javax.speech.synthesis.Synthesizer;
import javax.speech.synthesis.SynthesizerModeDesc;
import javax.speech.synthesis.SynthesizerProperties;
import javax.speech.synthesis.Voice;

/*
Class: SelectVoice-Selects the voice in which the synthesizer speaks the text.
	Fields:
		retValue: Represents the voice that is currently selected by the user.
	Methods:
		getVoices():Retrieves all the voices in the general locale that are available on the user's computer.
		actionPerformed(): Determines the operations to be performed when the user clicks any button.
*/
public class SelectVoice extends JFrame implements ActionListener
{
/*
Declare variables
*/
JLabel pageTitle;
JRadioButton rb;
ButtonGroup bg;
JButton ok,cancel;
JPanel voicePanel;
JPanel buttonPanel;
JPanel mainPanel;
Font f,f1;
Hashtable voicehash;
TextPad textpad = null;
/*
Set the default value for the selected voice
*/
public static String retValue = "kevin16";
public static String retkey=null;
/*
SelectVoice: Define the default constructor to create the user interface for the SelectVoice.
Parameters:
		textpad: An object of TextPad.java class
Return Type: NA
*/
public SelectVoice(TextPad textpad)
{
	setTitle("Voice Synthesizer Application");
	this.textpad=textpad;
	this.setSize(150,200);
	this.setResizable(false);
	/*
	Initialize the variables
	*/
	pageTitle=new JLabel("Select the voice");
	voicePanel=new JPanel();
	buttonPanel=new JPanel();
	mainPanel=new JPanel();
	bg=new ButtonGroup();
	/*
	Set layout for the panels
	*/
	buttonPanel.setLayout(new GridLayout(1,2));
	mainPanel.setLayout(new BorderLayout());
	/*
	Create objects of Font class
	*/
	f=new Font("Verdana",Font.BOLD,12);
	pageTitle.setFont(f);
	f1=new Font("Verdana",Font.BOLD,10);
	/*
	Initialize the OK button
	*/
	ok=new JButton("OK");
	ok.setFont(f1);
	ok.addActionListener(this);
	/*
	Initialize the cancel button
	*/
	cancel=new JButton("Cancel");
	cancel.setFont(f1);
	cancel.addActionListener(this);
	/*
	Invoke the getVoices() method to retrieve all available voices.
	*/
	getVoices("general");
	/*
	Add JButtons to buttonPanel
	*/
	buttonPanel.add(ok);
	buttonPanel.add(cancel);
	/*
	Add contents to the mainPanel
	*/
	mainPanel.add(pageTitle,BorderLayout.NORTH);
	mainPanel.add(voicePanel,BorderLayout.CENTER);
	mainPanel.add(buttonPanel, BorderLayout.SOUTH);
	/*
	Add mainPanel to the main window
	*/
	getContentPane().add(mainPanel);
	/*
	Add window listener to this window
	*/
	addWindowListener(new WindowAdapter()
		{
			public void windowClosing(WindowEvent we)
			{
				setVisible(false);
			}
		});
}
/*
getVoices():Retrieves all the voices available in the general locale of user computer.
Parameters:
		modename: String representing the selected mode.
Return Type: NA
*/
public void getVoices(String modename)
{
	/*
	Cretae an object of SynthesizerModeDesc class
	*/
	SynthesizerModeDesc required = new SynthesizerModeDesc(
		null,
		modename,
		Locale.US,
		null,
		null);
	/*
	Retrieve available synthesizers in an object of EngineList class
	*/
	EngineList engineList = Central.availableSynthesizers(required);
	/*
	Run a loop from 1 to the size of EngineList object
	*/
	voicehash=new Hashtable();
	for (int i = 0; i < engineList.size(); i++) 
	{
		/*
		Initialize an object of SynthesizerModeDesc class
		*/
		SynthesizerModeDesc desc = (SynthesizerModeDesc) engineList.get(i);
		/*
		Retrieve the voices available in the current synthesizer
		*/
		Voice[] voices = desc.getVoices();
		/*
		Set layout of the voicePanel
		*/
		voicePanel.setLayout(new GridLayout(voices.length,1));
		/*
		Add all the available voices to the voicePanel
		*/
		for (int j = 0; j < voices.length; j++) 
		{
			
			String temp=voices[j].getName().toString();
			int x=j+1;
			String voiceno="Voice "+x;
			voicehash.put(voiceno,temp);
			System.out.println(temp);
			/*
			Initialize an object of JRadioButton class
			*/
			rb=new JRadioButton(voiceno);
			/*
			Set kelvin16 as the default selected voice
			*/
			if(temp.equals("kevin16"))
				rb.setSelected(true);
			/*
			Add JRadioButton to a buttopngroup
			*/
			bg.add(rb);
			/*
			Add JRadioButton to voicePanel
			*/
			voicePanel.add(rb);
		}
	}
}
/*
actionPerformed(): Defines the operations to be performed when the user clicks any button.
Parameters:
		ev: An object of ActionEvent class
Return Type:NA
*/
public void actionPerformed(ActionEvent ev)
	{
	/*
	This code executes when the user clicks the OK button.
	*/
	if(ev.getSource()==ok)
		{
			/*
			Retrieve all the elements in thr button group in an enumeration
			*/
			Enumeration enum=bg.getElements();
			/*
			Run until the enumeration has any element
			*/
			while(enum.hasMoreElements())
			{
				JRadioButton button=(JRadioButton)enum.nextElement();
				/*
				Retrieve the label of the JRadioButton that is currently selected.
				*/
				if (button.isSelected())
				{
					retkey=button.getText();
					retValue=(String)voicehash.get(retkey);
					this.setVisible(false);
					textpad.setvoice(retValue);
				}
			}
		}
		else
		/*
		This part of code executes when the user clicks cancel button.
		*/
		if(ev.getSource()==cancel)
		{
			/*
			Hide the user interface of SelectVoice.java file
			*/
			this.setVisible(false);
		}
	}
}