Strange: ComboBox not moving when it should

It happens that programming problems are caused by common causes for discovering of which, it's not allways necessary to have exact source code at hand. Therefore I've asked about my problem without source code.

As it seems that problem I've described is not of a general nature that others have experienced before, I'll provide example code. It will take some time to produce it as it's compplex system we've got for maintenance couple weeks ago, and I'm not completely familiar with alll the inner dependencies yet.

sankotma at 2007-7-12 9:25:52 >

test\best\TestApp3.java

package test.best;

import java.awt.Dimension;

import java.awt.Toolkit;

import javax.swing.JFrame;

import javax.swing.UIManager;

public class TestApp3 {

public TestApp3() {

JFrame frame = new TestFrame3();

frame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );

frame.setVisible(true);

}

public static void main(String[] args) {

try {

UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());

} catch (Exception e) {

e.printStackTrace();

}

new TestApp3();

}

}

test\best\TestFrame3.java

package test.best;

import cor.no.exception.CommonException;

import java.awt.Color;

import java.awt.Component;

import java.awt.Cursor;

import java.awt.Dimension;

import java.awt.Rectangle;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.MouseAdapter;

import java.awt.event.MouseEvent;

import javax.swing.JButton;

import javax.swing.JComboBox;

import javax.swing.JComponent;

import javax.swing.JFrame;

import javax.swing.JLabel;

public class TestFrame3 extends JFrame {

private JComboBox jComboBox1 = new JComboBox(new String[]{"Indicates","a","window","is","currently","the","active","window","Indicates","a","window","is","currently","the","active","window"});

private JLabel jLabel1 = new JLabel();

private JButton jButton1 = new JButton();

public TestFrame3() {

try {

jbInit();

} catch (Exception e) {

e.printStackTrace();

}

}

private void jbInit() throws Exception {

this.getContentPane().setLayout( null );

this.setSize(new Dimension(726, 458));

jComboBox1.setBounds(new Rectangle(200, 60, 140, 25));

jLabel1.setText("Back Combo");

jLabel1.setBounds(new Rectangle(45, 65, 110, 20));

jButton1.setText("Cover us with Glass");

jButton1.setBounds(new Rectangle(70, 125, 235, 30));

jButton1.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

jButton1_actionPerformed(e);

}

});

this.getContentPane().add(jButton1, null);

this.getContentPane().add(jLabel1, null);

this.getContentPane().add(jComboBox1, null);

}

private void jButton1_actionPerformed(ActionEvent e) {

JComponent glassPane = (JComponent)this.getGlassPane();

glassPane.setOpaque(true);

glassPane.setBackground(Color.RED); // so that you can see that it's there

glassPane.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR)); // so that you can see that it's there

glassPane.addMouseListener(new MouseAdapter(){}); // ignores all mouse events

TestInternalFrame3 tif = null;

tif = new TestInternalFrame3();

tif.setParentGlassPane(glassPane); // so that we can get rid of glass pane when internal frame is closed

tif.setPreferredSize(new Dimension(400,400));

tif.setLocation(0,100);

tif.setResizable(true);

tif.setVisible(true);

glassPane.add(tif);

glassPane.setVisible(true);

}

}

test\best\TestInternalFrame3.java

package test.best;

import java.awt.BorderLayout;

import java.awt.Rectangle;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JButton;

import javax.swing.JComboBox;

import javax.swing.JComponent;

import javax.swing.JInternalFrame;

import javax.swing.JPanel;

public class TestInternalFrame3 extends JInternalFrame {

private JPanel jPanel1 = new JPanel();

private JComboBox jComboBox1 = new JComboBox(new String[]{"The","glass","pane","is","useful","when","you","want","to","be","able","to","catch","events","or","paint","over","an","area","that","already","contains","one","or","more","components"});

private JButton jButton1 = new JButton();

private JComponent glassPane = null;

public TestInternalFrame3() {

try {

jbInit();

} catch (Exception e) {

e.printStackTrace();

}

}

private void jbInit() throws Exception {

this.setTitle( "Test Internal Frame 3" );

jPanel1.setLayout(null);

jComboBox1.setBounds(new Rectangle(105, 90, 165, 25));

jComboBox1.setLightWeightPopupEnabled(false); // popup won't show otherwise !!!!

jButton1.setText("Close modal window");

jButton1.setBounds(new Rectangle(140, 160, 88, 29));

jButton1.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

jButton1_actionPerformed(e);

}

});

jPanel1.add(jButton1, null);

jPanel1.add(jComboBox1, null);

this.getContentPane().add(jPanel1, BorderLayout.CENTER);

}

private void jButton1_actionPerformed(ActionEvent e) {

this.dispose();

this.glassPane.setVisible(false);

}

public void setParentGlassPane(JComponent glassPane){

this.glassPane = glassPane;

}

}

sankotma at 2007-7-12 9:25:52 >