Detecting Resizing of JDialog

Hey all,
I have a JComponent added to a JDialog that is the size of the JDialog in question. When I resize my JDialog by dragging around the edge of the JDialog window, I want my JComponent to be resized DURING the resizing of the JDialog. Currently, it seems to be that when the resizing is done, my Layout Manager(FlowLayout by default right?) resizes my JComponent for me AFTER the event. Is there anyway to resize the component DURING the resizing of the JDialog? Resize Event listeners under the ComponentListener(componentResized) does not work, it only detects resizing at the end of the event, like I said, I am looking for something that works DURING the event!
Any and all help is appreciated!
Rob

I tried to do this before and I would recommend against it. The resize events are posted to the end of the thread queue. I think in order to do this you would have to muck around with the base class. Ugly stuff. If possible I would try to rework the design so you don't need to do this.

Similar Messages

Dynamic resizing in JDialog using setSize not working properly on solaris

can anyone help..
Dynamic resizing in JDialog using setSize is not working properly on solaris, its work fine on windows.
i have set Jdialog size to setSize(768,364),
when i dynamically resizing it to setSize(768,575); it doesn't get change but when i move dialog using mouse it gets refreshed.
this problem is only happening on solaris not on windows.

Hi,
It's only an approach but try a call of validate() or repaint() after re-setting the size of your dialog.
Cheers, Mathias

Problem resizing the JDialog???

hi,
I have a JDialog to which I am adding a JTable and JButton to search.
Based on search condition the table gets populated.
Problem here is
I give search condition 1 and puplate the table after that I resize the JDialog
Now i again serach it.Now the JDialog's size goes to the previous thing it does'nt take the resized size.
in the end of my seacrh action listner I am doing
this.pack();
this.setVisible(true);
this.setResizable(true);While running in debug mode I noticed once it execute this.pack();
the resizing is gone.but if I remove this.pack() the JTable is not shown...
Any idea about this problem??
thnx
neel

The pack() method lays it out according to the preferred size of the content.
You need to either only pack it when you first create it, or note the actual size before packing and if it's non-null and non-zero then restore it after packing.

JLabel needs resizing in JDialog

I have a subclass of JDialog that shows messages to the user, kind of like JOptionPane, but with a bit more processing for my own purposes. I have a JLabel in the dialog that I set the message text on. The message is almost always HTML with some formatting, and frequently the text causes the size of the label to be higher than it was when laid out in NetBeans. If I just show the dialog that way, the label will adjust it's height but will push items below it (like my MMButtons) off the bottom of the dialog. The code calls pack() and validate() immediately before setVisible(true).
If I use a SwingWorker to schedule another pack() and validate() 500ms after showing the dialog, then that pack/validate cause the dialog to resize as it needs to.
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<pre>
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(pnlButtons, javax.swing.GroupLayout.DEFAULT_SIZE, 372, Short.MAX_VALUE)
.addComponent(lblMessage, javax.swing.GroupLayout.DEFAULT_SIZE, 372, Short.MAX_VALUE)
.addComponent(txtText, javax.swing.GroupLayout.DEFAULT_SIZE, 372, Short.MAX_VALUE))
.addContainerGap())
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(lblMessage, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(txtText, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(pnlButtons, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap())
</pre>

Why? Because the { code } tag was not documented in the help box on the right side, nor is there a button for it in the tool bar.
Anyway, here is the layout code again:
    javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
    getContentPane().setLayout(layout);
    layout.setHorizontalGroup(
      layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
      .addGroup(layout.createSequentialGroup()
        .addContainerGap()
        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
          .addComponent(pnlButtons, javax.swing.GroupLayout.DEFAULT_SIZE, 372, Short.MAX_VALUE)
          .addComponent(lblMessage, javax.swing.GroupLayout.DEFAULT_SIZE, 372, Short.MAX_VALUE)
          .addComponent(txtText, javax.swing.GroupLayout.DEFAULT_SIZE, 372, Short.MAX_VALUE))
        .addContainerGap())
    layout.setVerticalGroup(
      layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
      .addGroup(layout.createSequentialGroup()
        .addContainerGap()
        .addComponent(lblMessage, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
        .addComponent(txtText, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
        .addComponent(pnlButtons, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
        .addContainerGap())
    );

How to deal with images when detecting/resizing screen?

Hi there,
I am trying to learn how to detect screen resolution and
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depending on the resolution, or is there some way of linking to
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as far as I know this has always been a bit of an issue when
using
images inside a scaled movie. If you display a high res image
inside a
scaled down movie, flash can't "reoptimize" it so the image
looks
jagged. Of course the other way around is even worse..
Serving images based on the screen res could be possible if
you detect
it using javascript but could be a night mare to maintain and
test it...
I guess the questions I would ask myselkf are:
1. what is my audience? What resolution the majority of them
will have?
2. Is there anyway I can keep the image size fixed, and scale
to fit he
rest of the design?
3. How much time do I have to implement the customized
version?
It really depends on your project..but to answer to your
quuestion yes
you can detect.
http://www.pageresource.com/jscript/jscreen.htm
and your flash will have to interpret and load images from
different
directories based on the var passed

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engine, not a
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www.offroadfire.com
Head Developer
http://www.blurredistinction.com
Adobe Community Expert
http://www.adobe.com/communities/experts/

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to resize the dialog once it pops up. I want to restrict that. It should be
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Smooth animated moving/resizing of JDialog

Greetings all,
I'm not sure if this belongs here or in the Java 2D subforum, but whatever. I'm working on a Swing desktop application whose main frame is laid out in a 3x3 GridLayout. Some of the panels in this grid have JLists with very long entries in them, and our users frequently complain that these panels are too small, so we'd like to implement the ability for them to "pop out" into bigger panels temporarily. We did this by simply removing the panel from the grid and dropping it in a JDialog of suitable size.
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Thanks!

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then animate it growing by having a Timer call SetBounds with increasing parameters until the desired maximum size is reached. This looks pretty nice, but it's kind of jaggy and flickerySounds reasonable to me, I don't see why it would be jaggy and flickery.
If you need further help then you need to create a [Short, Self Contained, Compilable and Executable, Example Program (SSCCE)|http://homepage1.nifty.com/algafield/sscce.html], that demonstrates the incorrect behaviour.
Don't forget to use the Code Formatting Tags so the posted code retains its original formatting. That is done by selecting the code and then clicking on the "Code" button above the question input area.

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I have JFrame, and JDialog.
Can you help me how can I send information to main frame that jdialog is closed, and send some of data from jdialog to main frame?
Thank you in advanced!

Maybe I'm wrong but I think you might be doing things in reverse order. Normally you check if the user click 'Ok' or 'Cancel' before closing the dialog isn't it? If it is that way you can invoke a method in the JFrame with the parameters you need and then close the dialog. You can even trap the event of closing dialog with windows X icon. For more information refer to Dialog Demo in Java tutorial, it really helps a lot.

Dynamic resizing in JDialog using setSize not working properly

Hi,
I have a dialog in which i have two radio buttons.
As i click on other radio button the size of the dialog should change.
I did so using setSize.
As i change the size from smaller dialog to a bigger one then newly created portion is not painted properly. Although the size is increased but the painting of the new portion is not done fine.
Any ideas?
Is this is a Java bug?
Here is the code snippet:
public MyDialog() {
     Container contentPane = this.getContentPane();
     JPanel radioPanel = new JPanel();
ButtonGroup radioGroup = new ButtonGroup();
mInstancesButton = new JRadioButton("Instances");
mActivitiesButton = new JRadioButton("Activities");
mInstancesButton.setBounds(100,0,100,25);
mActivitiesButton.setBounds(200,0,100,25);
mInstancesButton.addItemListener(this);
mActivitiesButton.addItemListener(this);
radioGroup.add(mInstancesButton);
radioGroup.add(mActivitiesButton);
radioPanel.setLayout(null);
radioPanel.add(mInstancesButton);
radioPanel.add(mActivitiesButton);
radioGroup.setSelected(mInstancesButton.getModel(), true);
     contentPane.add(radioPanel);
     this.setSize(600,300);
public void itemStateChanged(ItemEvent ie) {
Container contentPane = this.getContentPane();
if(ie.getSource().equals(mInstancesButton) && ie.getStateChange() == ie.SELECTED) {
this.setSize(600,300);
else if(ie.getSource().equals(mActivitiesButton) && ie.getStateChange() == ie.SELECTED) {
this.setSize(600, 500);

Hi,
It's only an approach but try a call of validate() or repaint() after re-setting the size of your dialog.
Cheers, Mathias

Detecting window resizing

My application displays a JFrame object that contains a JPanel object. The JPanel contains graphics that I would like to update when the JFrame is resized. What kind of listener can I add either to the JFrame or the JPanel, so I can detect resizing events?
Thanks for your help.

I appreciate the replies to my question very much. Yet I have 2 problems to overcome:
1. Apparently WindowStateListener is available only in version 1.4.*. I have to support users that run on JRE 1.3.
2. I don't see a state change that has to do with resizing a window. I do see states such as opening, closing, iconifying, gaining focus, etc. But none of these have todo with resizing when the user drags a border or a corner of the window and resizes it.
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IMAGE NOT DISPLAYED OVER JButton ON JDialog

Hi,
I am trying to display an image over a JButton inside a JDialog(pops up on button click from an applet). But it is invisible. But I am sure that it is drawn on the ContentPane since when i click partially/half at the position
of the JButton I could see the JButton with the image. Actualy I am resizing the JDialog since I have two buttons, one to minimise and the other two maximise the size of the JDailog.
All the buttons are in place but not visible neither at the first place nor when the JDialog is resized.
The code is as follows:
package com.dataworld.gis;
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.print.*;
import javax.swing.*;
public class PrintThisPolygon extends JDialog {
     protected Image image;
     protected JButton print;
     protected JButton resize;
     protected JButton desize;
     private int pX=0, pY=0, pWidth=0, pHeight=0;
     public PrintThisPolygon(JFrame parent, Viewer viewer) {
          super(parent, "Print Polygon", true);
          this.setModal(false);
          getContentPane().setLayout(null);
          image = this.viewer.getScreenBuffer();
          pane = new Panel();
          print = new JButton("print", new ImageIcon("images/print.gif"));
          print.setBounds(0,5,50,20);
          print.setEnabled(true);
          print.addActionListener(new ActionListener(){
               public void actionPerformed(ActionEvent ae){
                    print();
          resize = new JButton("+", new ImageIcon("images/print.gif"));
          resize.setBounds(55,5,50, 20);
          resize.addActionListener(new ActionListener(){
               public void actionPerformed(ActionEvent ae){
                    resizePlus();
          desize = new JButton("-", new ImageIcon("images/print.gif"));
          desize.setBounds(105,5,50, 20);
          desize.addActionListener(new ActionListener(){
               public void actionPerformed(ActionEvent ae){
                    resizeMinus();
          getContentPane().add(print);
          getContentPane().add(resize);
          getContentPane().add(desize);
public String getAppletInfo() {
     return "Identify Polygon\n"
public void paint(Graphics g){
     System.out.println("Paint : pX " + pX + " pY :" + pY);
     g.drawImage(image, pX, pY, pWidth, pHeight, getBackground(), this);
protected void print() {
     ImagePrint sp = new ImagePrint(this.viewer);
public void resizeMinus(){
     repaint();
public void resizePlus(){
     repaint();
Can anybody has any clue. Can anybody help me out.
Thanx

I added resize code for those buttons and ended up with repaint problems too. When you manually resized the window everything was fine again. After a bit of digging around I found you need to call validate on the dialog and then things work.
IL,
There is the new scaling version of the code I modified above:package forum.com.dataworld.gis;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class PanelPaintFrame extends JFrame {
     public static void main(String[] args) {
          PanelPaintFrame frame = new PanelPaintFrame ();
          frame.setVisible (true);
     public PanelPaintFrame () {
          setBounds (100, 100, 600, 600);
          setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
          JButton showPrintDialogButton = new JButton ("Show Print Dialog...");
          JPanel buttonPanel = new JPanel ();
          buttonPanel.add (showPrintDialogButton);
          getContentPane ().add (buttonPanel);
          showPrintDialogButton.addActionListener (new ActionListener () {
               public void actionPerformed (ActionEvent e) {
                    PrintThisPolygon printDialog = new PrintThisPolygon (PanelPaintFrame.this);
                    printDialog.show();
          pack ();
     public class PrintThisPolygon extends JDialog {
          protected ImageIcon myOrigonalImage = null;
          protected Image image;
          protected JButton print;
          protected JButton resize;
          protected JButton desize;
          private int pX=0, pY=0, pWidth=0, pHeight=0;
          JPanel pane = null;
          public PrintThisPolygon(JFrame parent/*, Viewer viewer*/) {
               super(parent, "Print Polygon", true);
//               this.setModal(false);
               getContentPane().setLayout(null);
               // Substitute my own image
               myOrigonalImage = new ImageIcon (PrintThisPolygon.class.getResource ("images/MyCoolImage.jpg"));
               // Start off full size
               pWidth = myOrigonalImage.getIconWidth();
               pHeight = myOrigonalImage.getIconHeight();
               image = myOrigonalImage.getImage ().getScaledInstance(pWidth, pHeight, Image.SCALE_DEFAULT);
//               image = this.viewer.getScreenBuffer();
//               pane = new Panel();
               // Create a JPanel to draw the image
               pane = new JPanel(){
                    protected void paintComponent(Graphics g) {
                         System.out.println("Paint : pX " + pX + " pY :" + pY);
                         g.drawImage(image, pX, pY, pWidth, pHeight, getBackground(), this);
               pane.setBounds (0, 0, pWidth, pHeight);
               // Load the button image using a URL
               print = new JButton("print", new ImageIcon(PrintThisPolygon.class.getResource ("images/print.gif")));
//               print = new JButton("print", new ImageIcon("images/print.gif"));
               print.setBounds(0,5,55,20);
               print.setEnabled(true);
               print.addActionListener(new ActionListener(){
                    public void actionPerformed(ActionEvent ae){
                         print();
               resize = new JButton("+", new ImageIcon("images/print.gif"));
               resize.setBounds(55,5,50, 20);
               resize.addActionListener(new ActionListener(){
                    public void actionPerformed(ActionEvent ae){
                         resizePlus();
               desize = new JButton("-", new ImageIcon("images/print.gif"));
               desize.setBounds(105,5,50, 20);
               desize.addActionListener(new ActionListener(){
                    public void actionPerformed(ActionEvent ae){
                         resizeMinus();
               // Setup a transparent glass panel with no layout manager
               JPanel glassPanel = new JPanel ();
               glassPanel.setLayout (null);
               glassPanel.setOpaque (false);
               // Add the image panel to the dialog
               getContentPane().add(pane);
               // Add the buttons to the glass panel
               glassPanel.add(print);
               glassPanel.add(resize);
               glassPanel.add(desize);
               // Set our created panel as the glass panel and turn it on
               setGlassPane (glassPanel);
               glassPanel.setVisible (true);
               setBounds (100, 100, pWidth, pHeight);
//               setBounds (100, 100, 500, 300);
          public String getAppletInfo() {
               return "Identify Polygon\n";
//          public void paint(Graphics g){
//          protected void paintComponent(Graphics g) {
//               System.out.println("Paint : pX " + pX + " pY :" + pY);
//               g.drawImage(image, pX, pY, pWidth, pHeight, getBackground(), this);
          protected void print() {
               // Pretend to print
//               ImagePrint sp = new ImagePrint(this.viewer);
               System.out.println ("Print view...");
          public void resizeMinus(){
               // Scale the image down 10%
               int scaledWidth = pWidth - (int)(pWidth * 0.1);
               int scaledHeight = pHeight - (int)(pHeight * 0.1);
               scaleImage (scaledWidth, scaledHeight);
          public void resizePlus(){
               // Scale the image up 10%
               int scaledWidth = pWidth + (int)(pWidth * 0.1);
               int scaledHeight = pHeight + (int)(pHeight * 0.1);
               scaleImage (scaledWidth, scaledHeight);
          private void scaleImage (int scaledWidth, int scaledHeight) {
               // Create a new icon for drawing and retrieve its actuall size
               image = myOrigonalImage.getImage ().getScaledInstance (scaledWidth, scaledHeight, Image.SCALE_DEFAULT);
               pWidth = scaledWidth;
               pHeight = scaledHeight;
               // Resize
               setSize (pWidth, pHeight);
               pane.setSize (pWidth, pHeight);
               validate();
}

How to set maximum bound for JDialog

Hai..
I want to resize the JDialog ...but it should particular size ....
In JFrame ,We will define maximum Size using
setMaximizedBounds(Rectangle bounds)
like that i want in JDialog....
give Solution
Thanks in Advance....

What you are asking doesn't make much sense because, setMaximizedBounds() only defines the bounds for the window in the maximized state, not the maximum size you can manually resize. And JDialogs don't have a maximized state. So what you are asking is not possible.
If you want to restrict manual resizes, then use a component listener and restrict the bounds as it's resized.

Catching the start/end of component resizing?

Hi Folks,
I have a JPanel descendant and I want to store its initial size before being resized (by mouse), then at the end of resining, use this value to calculate the resizing factor.
componentAdapter.componentResized() works fine for Windows LAFs, as it is called just once (when the mouse is released). But, using other Look and feels, it is called several times during the resize process (it can be seen also that the panel is repainted continuously).
I tried to turn off repainting with setDynamicLayout(), but besides it did not worked at all, it looked ugly.
My question: is there a way to get an event for determining the beginning and the end of the resizing process using any LAFs?
Thanks,
-meri

Hello,
well, who's controlling the resize? You have a mouse
drag to do it? Then you can know on mouse press what
the size is...Yes, a mouse drag is used to resize a JDialog which contains my component. The problem with mouse press is if it's a resizing (grabbing the border of the dialog), then no other mouse events are fired on the component (either MousePressed).
or maintain the "current size" in a variable and
compare that to the componentResized call and after
done, reset the "current size" to the new size.Fine, I could do it (already done), but for special reasons, it would be much more better to calculate further sizes of the very first (initial) one.
Thanks anyway! I will keep on searching for some solution...
-meri

JDialog Problem

When ever i set resize of JDialog is false ,the image idisappears. Plz help me
Advanced thanx to all
Susi

Ahem... It's amazing that you haven't posted a minimal example program that demonstrates your problem.

Detecting Resizing of JDialog

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