JAVA - JInternalFrame

 

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package tjinternalframe;

import javax.swing.*;

import java.awt.event.*;

import java.awt.*;

public class TJInternalFrame extends JFrame {

    Container container;

    JButton button;

    JDesktopPane desktop;

    JInternalFrame internalFrame;

    static int frameCount = 1;

    static final int xOffSet = 25;

    static final int yOffSet = 25;

    // 1. Constructor of the frame class.

    public TJInternalFrame() {

        // 2. Give a title to the frame and get its content pane.

        super("TJInternalFrame");

        container = this.getContentPane();

        // 3. Create a button and add it at the lower portion of the

        // frame; also add an action listener.

        button = new JButton("Click to Create More Internal Frames");

        button.addActionListener(new ButtonListener());

        container.add(button, BorderLayout.SOUTH);

        // 4. Create a desktop pane and add an internal frame.

        desktop = new JDesktopPane(); // holds the internal frame

        container.add(desktop); // add the desktop to the main frame

        createInternalFrame();  // create an internal frame

       

        // 5. Add the window listener, set the frame size, default close

        // operation and make the frame visible.

        addWindowListener(new WindowEventHandler());       

        setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);

        setSize(400, 300); // width=400, height=300

        show(); // Display the frame

    }

    // 6. Creates an internal frame and adds it to the desktop pane.

    // Takes care of displaying frames with overlap offsets when called

    // multiple times.

    public void createInternalFrame() {

        // 7. Use a suitable internal frame constructor.

        JInternalFrame iFrame = new JInternalFrame(

                  "Internal Frame - " + (frameCount++), 

                  true,   // can be resized

                  true,   // can be closed

                  true,   // can be maximized

                  true);  // can be iconified

        // 8. Set the location and size, and add it to the desktop pane.

        iFrame.setLocation( xOffSet*(frameCount-2),

                            yOffSet*(frameCount-2));

        iFrame.setSize(200,150); 

        desktop.add(iFrame);  

        

        // 9. Let the frame be selected.

        try {

            iFrame.setSelected(true);

        } catch (java.beans.PropertyVetoException ex) {

            System.out.println(

               "Exception while selecting an internal frame");

}

    }

    // 10. The button (action) listener.

    class ButtonListener implements ActionListener {

        public void actionPerformed(ActionEvent e) {

            createInternalFrame();

        }

    }

    // 11. The listener class to handle closing of the frame.

    class WindowEventHandler extends WindowAdapter {

       public void windowClosing(WindowEvent evt) {

            System.exit(0);

        }

    }   

    // 12. The main method.

    public static void main(String[] args) {

        TJInternalFrame frame = new TJInternalFrame();

    }

}