call object on click and wait for dispose

Question

i am developing an Virtual keyboard module.

KeyBoardModule.java

KeyBoardModule kbm = new KeyBoardModule("small", false, null);

is called when in Other jForm(MainFrame.java) is clickevent on textbox then I get new JFrame with keyboard(its like popup window), When JButton enter is pressed it saves data to variable textFieldValue from textarea of KeyBoardModule. than frame.disponse()

the main class calls MainFrame and mainframe call on click the keyboard, and i need to return value from keyboard to mainframe..

without using actionlistener(for enter button) in mainframe

Answer 1

To return a value directly from GUI1 to another GUI2 , GUI1 must have a reference to the object of GUI2. So that whenever you want to pass any message from GUI1 to GUI2 , you could do it by calling the appropriate method of GUI2. For example consider the code given below. While creating the object of InputBoard in MainFrame we pass the current object of MainFrame to InputBoard's constructor so that InputBoard could pass its input to MainFrame GUI using appropriate public method of MainFrame. Here MainFrame opens the InputBoard frame on click of button. And whenever some input is passed to the JTextField in InputBoard it is reflected within the JTextArea of MainFrame.

import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.JTextArea;
import javax.swing.JScrollPane;
import javax.swing.JButton;
import javax.swing.SwingUtilities;
import java.awt.FlowLayout;
import java.awt.BorderLayout;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.event.DocumentListener;
import javax.swing.event.DocumentEvent;

class MainFrame extends JFrame implements ActionListener
{
    private JButton button;
    private JTextArea tArea;
    private InputBoard inBoard;
    public void prepareAndShowGUI()
    {
        setTitle("Main Frame");
        tArea = new JTextArea(10,30);
        button = new JButton("Click Me");
        inBoard = new InputBoard(this);
        inBoard.prepareGUI();
        JScrollPane tFieldPane = new JScrollPane(tArea);
        tArea.setLineWrap(true);
        tArea.setWrapStyleWord(true);
        tArea.setEditable(false);
        button.addActionListener(this);
        getContentPane().add(tFieldPane);
        getContentPane().add(button,BorderLayout.SOUTH);
        pack();
        setLocationRelativeTo(null);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setVisible(true);
        button.requestFocus();
    }
    @Override
    public void actionPerformed(ActionEvent evt)
    {
        if (!inBoard.isVisible())
        {
            inBoard.setVisible(true);
        }
        inBoard.toFront();
    }
    public void setText(final String s)
    {
        tArea.setText(s);
    }
    public static void main(String[] st)
    {
        SwingUtilities.invokeLater( new Runnable()
        {
            @Override
            public void run()
            {
                MainFrame mf = new MainFrame();
                mf.prepareAndShowGUI();
            }
        });
    }
}
class InputBoard extends JFrame implements DocumentListener
{
    MainFrame mainFrame ;
    JTextField inField;
    public InputBoard(MainFrame mainFrame)
    {
        this.mainFrame = mainFrame;
    }
    public void prepareGUI()
    {
        setTitle("Input Board");
        inField = new JTextField(40);
        getContentPane().setLayout(new FlowLayout());
        getContentPane().add(inField);
        inField.getDocument().addDocumentListener(this);
        setLocationRelativeTo(mainFrame);
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        pack();
    }
    @Override
    public void changedUpdate(DocumentEvent evt)
    {
        mainFrame.setText(inField.getText());
    }
    @Override
    public void insertUpdate(DocumentEvent evt)
    {
        mainFrame.setText(inField.getText());
    }
    @Override
    public void removeUpdate(DocumentEvent evt)
    {
        mainFrame.setText(inField.getText());
    }
}