Mouse clicking in blank area destroying all button display

Question

Hello,
I have created one small application using JFrame, Jbutton and Panel. whenever i click on root button it create one more button etc etc.. and display properly but when i click on blank page it on the panel it destroy the display and not show more created button.. i have tried with panel.repaint() but it is not working... code goes like...
JFrame frame = new JFrame("MouseEventDemo");
JButton button = new JButton("Test");
panel.add(button);
applic.getContentPane().add(panel);
frame.pack();
frame.setSize(600,400);
frame.setVisible(true);
// call subclass for creating button.. and in subclass i also set the frame
Please help
R's
Binny

Answer 1

here is the code.... JButton, JPanel, ButtonViewer all this classes are resize into com.tree package i m trying to create root -> child button tree
import java.awt.AWTEvent;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Frame;
import java.awt.Image;
import java.awt.Event;
import java.awt.event.MouseEvent;
import java.awt.Container;
import java.awt.FlowLayout;
import com.tree.*
import java.sql.*;
import java.util.ArrayList;
import javax.swing.JApplet;
//import javax.swing.*;
import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.JComponent;
public class ButtonTestViewer extends Object implements MouseListener
     JFrame frame;
     ButtonViewer viewer = new ButtonViewer();
     JButton root;
     Panel panel;
     ButtonTestViewer()
          //super();
          frame = new JFrame("MouseEventDemo");
          viewer.setOrientation(Orientation.VERTICAL);
          viewer.setAlignment(Alignment.CENTER);
          panel = viewer.getPanel();
          panel.setBorder(BorderFactory.createTitledBorder("Visualizer Button"));
          root = new JButton("1");
          panel.add(root);
          JScrollPane jScrollPane1 = new JScrollPane();
          frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          jScrollPane1.setAutoscrolls(true);
          jScrollPane1.setViewportView(panel);
          frame.getContentPane().add(jScrollPane1, java.awt.BorderLayout.CENTER);
          //panel.addMouseListener(this);
          viewer.add(root, null );
          root.addButton( JButton.ACTIVATE_CALLBACK, new ButtonChild(viewer,null,frame,root.getText()) );
          frame.pack();
          frame.setSize(600,400);
          frame.setVisible(true);
          viewer.getPanel().repaint();
          viewer.getPanel().validate();
     public static void main(String argv[])
          new ButtonTestViewer();
public void mousePressed(MouseEvent e) {
          //frame.repaint();
          //repaint();
     public void mouseReleased(MouseEvent e) {
          //frame.repaint();
          //repaint();
     public void mouseEntered(MouseEvent e) {
          //frame.repaint();
          //repaint();
     public void mouseExited(MouseEvent e) {
          //frame.repaint();
          //repaint();
     public void mouseClicked(MouseEvent e) {
          System.out.println("mouse clicked");
          //panel.repaint();
class ButtonChild extends CallButton
static private int count = 0;
private ButtonViewer viewer;
private Image image;
private JFrame frame;
private int node;
private ArrayList nodeList = new ArrayList();
private ResultSet rs = null;
private String sql = "";
private int nodeid;
private int position;
private boolean nodeFlag = false;
public ButtonChild( ButtonViewer viewer, Image image, JFrame frame, String label )
     System.out.println("label is:"+label);
this.viewer = viewer;
this.image = image;
this.frame = frame;
this.node = Integer.parseInt(label);
this.nstmt = stmt;
//this.container = container;
//frame.show();
     public boolean activate(Event event)
          System.out.println("b");
          return false;
     public boolean activate(MouseEvent me)
          System.out.println("c");
          JButton child;
          try
               for(int i=0; i<nodeList.size(); i++)
                    if(node == Integer.parseInt(nodeList.get(i).toString()))
                         nodeFlag = true;
                         break;
               if(nodeFlag == false)
                    int k=3;
                    for(int i=2; i<=k; i++)
                         String name = ""+i;
                         //node = i
                         viewer.add(child = new JButton(name), (Widget)me.getSource() );
                         child.addButton( JButton.ACTIVATE_CALLBACK, new ButtonChild(viewer,image,frame,name) );
                         //container.add(child);
                         nodeList.add(name);
                    nodeList.add(""+node);
                    frame.repaint();
          }catch(Exception e)
               e.printStackTrace();
          return true;
}