I\'m creating a very simple program. I have created this classes : MainJframeClass, JDesktopPaneClass, JinternalFrameClass1 and JinternalFrameClass2. what ive done is that i i
It's simply a matter of references. The code that adds something to the JDesktopPane must have a reference to it, and so you will need to pass that reference into the class that needs it say via either a constructor parameter or a method parameter.
Edit 1
For example:
import java.awt.*;
import java.awt.event.*;
import java.util.Random;
import javax.swing.*;
public class ReferenceExample extends JPanel {
private JDesktopPane desktop = new JDesktopPane();
private Random random = new Random();
public ReferenceExample() {
JButton addInternalFrameBtn = new JButton("Add Internal Frame");
addInternalFrameBtn.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
addInternalFrame();
}
});
JPanel btnPanel = new JPanel();
btnPanel.add(addInternalFrameBtn);
setPreferredSize(new Dimension(600, 450));
setLayout(new BorderLayout());
add(new JScrollPane(desktop), BorderLayout.CENTER);
add(btnPanel, BorderLayout.SOUTH);
}
public void addInternalFrame() {
MyInternalFrame intFrame = new MyInternalFrame(ReferenceExample.this);
int x = random.nextInt(getWidth() - intFrame.getPreferredSize().width);
int y = random.nextInt(getHeight() - intFrame.getPreferredSize().height);
intFrame.setLocation(x, y);
desktop.add(intFrame);
intFrame.setVisible(true);
}
private static void createAndShowUI() {
JFrame frame = new JFrame("Reference Eg");
frame.getContentPane().add(new ReferenceExample());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
public static void main(String[] args) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
createAndShowUI();
}
});
}
}
class MyInternalFrame extends JInternalFrame {
// pass in the reference in the constructor
public MyInternalFrame(final ReferenceExample refEg) {
setPreferredSize(new Dimension(200, 200));
setClosable(true);
JButton addInternalFrameBtn = new JButton("Add Internal Frame");
addInternalFrameBtn.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// use the reference here
refEg.addInternalFrame();
}
});
JPanel panel = new JPanel();
panel.add(addInternalFrameBtn);
getContentPane().add(panel);
pack();
}
}
how to add the internal2 to desktoppane1 using a button placed somewhere in internal1.
In the ActionListener added to your button you can use code like the following to get a reference to the desktop pane:
Container container = SwingUtilities.getAncestorOfClass(JDesktopPane.class, (Component)event.getSource());
if (container != null)
{
JDesktopPane desktop = (JDesktopPane)container;
JInternalFrame frame = new JInternalFrame(...);
desktop.add( frame );
}