What is clipping region of swing component

hi,
What is mean of clipping region of component

http://java.sun.com/docs/books/tutorial/2d/display/clipping.html

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Swing component's margin in a frame

Hello all,
When you set the bounds of a Swing component in a frame, it will automatically apply those bounds to the VISIBLE part of the frame, so that, a Y value of 0, for example, will not be at the very top of the frame, but right underneath the title bar of the frame. If you give a regular AWT a value of 0 to it's Y coordinate, part (or all) of it will be covered by the title bar of the frame. This does not happen with Swing components, which automatically add the height of the title bar to the value you give to their Y coordinate.
Now, what I want to know is, how can I retrieve the value of that "automatic margin"?. How can I know the number of pixels that the Swing component is being slided down, in order to save the title bar of the frame? This value can not be constant, since it will differ from one platform to another, and from one Look 'n Feel to another, but I have not been able to find out the way to get the value that it's being applied in each case.
As allways, many thanks in advance for your help.

Don't know if there is any direct way to get this information. But, assuming the border width/height is equal on all four sides you could try something like:
Dimension frameD = frame.getSize();
Dimension contentD = frame.getContentPane().getSize();
int borderWidth = frameD.width - contentD.width;
int titleHeight = frameD.height - contentD.height - borderWidth;

Support for Multilingual Numeral Input in JTextField swing component

When the User Locale is changed from the regional & language options in the control panel and the standard digits are customized to a non Latin character set, all the windows applications adhere to the changes made. HTML also respects the changes in effect and displays any numeric values using the new character set, which are the national digits for many Eastern Locales such as Chinese, Arabic(Saudi Arabia), Urdu and many more. The JTextField swing component given by java, however, does not show any support to the new settings. Any numeric input is displayed in the Latin character set even when the input locale of the system is also changed respectively. Any text input for this case is correctly displayed in the desired literals and appropriate glyphs. However, unlike the AWT components, numeral input and display is not catered as per the user/developer's requirements. This behavior was first noticed in 2007, as far as i have found out, and was reported once again on the same thread in 2010. The thread is given below as a reference. No action or response has been taken. Kindly look into this matter and please let me know if this bug has been reported before and if there is any intent of providing a fix for it.
Reference: http://www.coderanch.com/t/344075/GUI/java/Multilingual-support-JTextField
Regards,
Aitzaz Ahmad
Software Engineer
SENSYS

I too had an itch to reply with something like this
This is a sign of work well done!
The WD has so strong UI abstraction, that hides client-server nature applications almost completely. If you search forum, you will even find posts where developers try to upgrade value of ProgressMeter in <b>for</b> loop )
VS

Swing component fires an event to non-GUI code

Hi all -- this is my first post in forums.sun.com.
Question to get me started -
I have a Swing component that fires an ActionEvent. I would like that ActionEvent to trigger code that does not run on the AWT Event Queue thread (some code that will take some time without impacting GUI rendering performance.)
I know I could put that Event's action command into a synchronized Queue, and have a worker thread checking the queue and taking action when it finds a command there. Likewise, I could flag a volatile boolean as true, and have a worker thread check the flag and take action when true.
Or (and I suspect this is best), I could create a new SwingWorker thread right in actionPerformed().
Any opinions on what makes sense?

pkwooster: Yep. That's what I meant.
As for the design pattern, Observer was the pattern I was intending to use (and have already implemented). Would anyone argue that another method is more efficient or "correct"?
My sample project is:
Business Object -> Main Dialog -> Embedded Dialog
The Main Dialog contains no business logic - just simple navigation events. The Embedded Dialog contains the real controls and reports any interaction using Swing events, which the Main Dialog picks up.
I then set up the Observer pattern between the Main Dialog and the Business Object.

Swing component to use as time editor

what is the Swing component that we can use to immitate clock component editor in windows?
you know, the list where you can select/edit hours,minutes seconds .... is it a JList
can somebody give a small example please
thanks

Read the tutorial: [How to Use Spinners|http://java.sun.com/docs/books/tutorial/uiswing/components/spinner.html]
You will find some examples there.

Can't add to JPanel after removeAll() is triggered by another swing compone

Consider the bit of code below. It's a much simplified version of my real app.
In jPanel1 is a single label. In jPanel2 is a single button.
The button in jPanel2 is supposed to wipe clear (with removeAll()) jPanel1 and add a new label in place of the old one. What actually happens is that after the first button press, jPanel1 is indeed cleared by the removeAll() method but the new label can't be added (or rather it can be added but won't show.) I can hard code the removal & addition back and forth all day & it works fine. It's just when I use a swing component like JButton or JComboBox that it doesn't work. Why?? Is this a thread thing? (I know I can just change the text of the label but the real app is much more complicated.)
package my.stuff;
import java.awt.*;
import javax.swing.*;
public class TreeTest3 extends javax.swing.JFrame {
     private String language = "english";
     public TreeTest3() {
          initComponents();
          jPanel1.setLayout(new FlowLayout());
          jPanel1.setVisible(true);
          changeLabel();
     private void changeLabel()
          System.out.println("language = " + language);
          jPanel1.removeAll();
          jPanel1.validate();
          jPanel1.add(new JLabel(language), "Center");
          repaint();
     @SuppressWarnings("unchecked")
        // <editor-fold defaultstate="collapsed" desc="Generated Code">
        private void initComponents() {
                jPanel1 = new javax.swing.JPanel();
                jPanel2 = new javax.swing.JPanel();
                jButton1 = new javax.swing.JButton();
                setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
                jPanel1.setBorder(new javax.swing.border.MatteBorder(null));
                jPanel1.setPreferredSize(new java.awt.Dimension(400, 204));
                javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
                jPanel1.setLayout(jPanel1Layout);
                jPanel1Layout.setHorizontalGroup(
                        jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                        .addGap(0, 398, Short.MAX_VALUE)
                jPanel1Layout.setVerticalGroup(
                        jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                        .addGap(0, 133, Short.MAX_VALUE)
                jButton1.setText("switch");
                jButton1.addActionListener(new java.awt.event.ActionListener() {
                        public void actionPerformed(java.awt.event.ActionEvent evt) {
                                jButton1ActionPerformed(evt);
                javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2);
                jPanel2.setLayout(jPanel2Layout);
                jPanel2Layout.setHorizontalGroup(
                        jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                        .addGroup(jPanel2Layout.createSequentialGroup()
                                .addContainerGap()
                                .addComponent(jButton1)
                                .addContainerGap(308, Short.MAX_VALUE))
                jPanel2Layout.setVerticalGroup(
                        jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                        .addGroup(jPanel2Layout.createSequentialGroup()
                                .addContainerGap()
                                .addComponent(jButton1)
                                .addContainerGap(126, Short.MAX_VALUE))
                javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
                getContentPane().setLayout(layout);
                layout.setHorizontalGroup(
                        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                        .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                        .addComponent(jPanel2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                layout.setVerticalGroup(
                        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                        .addGroup(layout.createSequentialGroup()
                                .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, 135, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                .addComponent(jPanel2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                pack();
        }// </editor-fold>
     private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
          if (language.equals("english")) language = "spanish"; else language = "english";
          changeLabel();
     public static void main(String args[]) {
          java.awt.EventQueue.invokeLater(new Runnable() {
               public void run() {
                    new TreeTest3().setVisible(true);
        // Variables declaration - do not modify
        private javax.swing.JButton jButton1;
        private javax.swing.JPanel jPanel1;
        private javax.swing.JPanel jPanel2;
        // End of variables declaration
}

It should be
                private void changeLabel()
          System.out.println("language = " + language);
          jPanel1.removeAll();
          jPanel1.add(new JLabel(language), "Center");
          jPanel1.revalidate();
          jPanel1.repaint();
     }

How to embed swing component into javaFX ?

Maybe I missed sth, but can someone explain us how can we embed swing component into javaFX 2.0 ?
This was previously handled with javaFX "srcipt", why can't we do it anymore ?
As far as the work to migrate from 1.3 to 2.0 is hard and huge, why do fx2.0 do not offer such feature anymore ? :(
I know that ThingFx project try to cope with, but the current code doesn't match with my needs.
Thanks for help,
Edited by: tibO on 23 nov. 2011 14:35

I know this post is old and the original authors might not even ben active; but it essentiall gets to the heart of what I'm trying to.
I have a JDialogBox. In it I have a panel (which I have to change to a JScrollPane). Inside the JPanel I have a JLabel and a JTextArea.
I was told to; make it scrollable in the event that there is too much info for the JDialogBox and to add HTML formatting (simple stuff like bold and colors.
1) The JScrollBar doesn't seem to produce the scroll side bars.
2) I must not be implementing the JEditorPane correctly. I just substituted JEditorPane for JTextArea in my code and it returned a type converstion error. Is JEditorPane even the correct object to use? Should I be using JTextPane?
The reason I can't do this on a JLabel by JLabel basis is because I don't know how many labels I will need at each runtime. And I also have to have a swingtimer on it. I could create an array and loop around it to create the JLabels. But it seems a waste of commuting cycles. This is no good?

Swing component's opaque property

Recenetly I read an article about "Painting in AWT and Swing" and feel confused about some points in the article.
http://java.sun.com/products/jfc/tsc/articles/painting/index.html
The article mentioned several Swing Painting Guidelines, I have question about the following two paragraphs:
6. If a Swing component's opaque property is set to true, then it is agreeing to paint all of the bits contained within its bounds (this includes clearing it's own background within paintComponent()), otherwise screen garbage may result.
7. Setting either the opaque or optimizedDrawingEnabled properties to false on a component will cause more processing on each paint operation, therefore we recommend judicious use of both transparency and overlapping components.
For the No.7, it's said setting the opaque to false will cause more process on each paint operation, I think it should changed to ture, since if set opaque property to true, it will paint all the bits contained within bounds as described in No.6.
So is this an error? What on earth is efficient for the opaque property value?
Thanks!

For the No.7, it's said setting the opaque to false will cause more process on each paint operationWhen you create an application you do something like this:
create a frame
add a panel to the frame
add a component to the panel. (lets say a JButton)
When you click on a button you need to change the state of the button to look 'pressed'. So you need to repaint area on the screen where the button is painted.
If the button is opaque(true) then you simply paint the button in its new state because the button is responsible for painting its background and any custom painting.
if the button is opaque(false) then you don't paint the background which means you need to search for the parent of the button (in our example the panel). Once you find the parent you need to paint that area of the panel that the button overlays and then you do the custom painting of the button.
So either way you have to repaint the same area. Hopefully it makes sense that painting a single component would be more efficient than painting parts of two separate components and determining which two components to repaint and what area to repaint of each component.

Hotel Menu Like Swing Component

Hi , I need a swing component which has the functionality as below
Initially, its looks like this
# Beverages
# Starters
# MainCourse
# Deserts
When the user clicks on > it should expand that menu item and show the individual items along with their icons.
# Beverages
       icon1 Tea
       icon2 Ice Tea
       icon3 Soft drink
# Starters
# MainCourse
# Deserts
Is there any readily available swing component which I can use for this behavior ?
It is ok even the swing component misses out expand functionality when the "#" is clicked.

But how can I set the icons to what I need ? Read the tutorial!!!
There is no way you could have read the tutorial and understand how a JTree works in 10 minutes.
So do some work on you own. Read the tutorial. Search the forum for examples.
We've pointed you in the right direction so do some learning on your own.

Changing custom AWT component to Swing component

I created my own AWT component. I'd like to change it to Swing component.
Does anyone know how to change or create a custom Swing component?
Please also provide some framework to develop a custom Swing component.

First try to know the difference between SWING & AWT. You can either adopt to SWING or AWT but be specific of what you want to do !
If you like to migrate from AWT to SWING ,then make the necessary changes in your coding.(ie, re frame things like , Frame to JFrame , Button to JButton ,JTextField to JTextField etc..)
For creating custom components ,say a component called MyLabel and you should design a class which extends JLabel and do whatever you like...
eg import javax.swing.*;
public class MyLabel extends JLabel
MyLabel(String title)
     this.setTitle(title);
     this.setBackground(Color.white);
     this.setForeground(Color.blue);
}For more details go to java tutorials.

Help-using document as a java swing component

Hi,
can i use a document excel file or a doc file as a swing component.
i have few templates in in excel and .doc format.
i use them to produce bills by just entering data.
Now i want to develop a swing application and use the same templates in jpanel or jtextpane or jeditorpane.
its very hectic to make templates in swing using tables and all.
is there any api which can help me out???
thanks

as a Swing component? No.
There's probably libraries for reading those types of files, and maybe displaying them. POI, perhaps?

How to set a Swing component as Modal window on a SWT Component.?

How to set a Swing component as Modal on a SWT Component.I mean, I have a window (SWT Container) with some menu items.
When I click on one menu item then i will get one new Swing Window.
When creating the new frame I had passed Modal value as TRUE in the constructer.Now child is not behaving as Modal Window.I mean I am able to go to parent window even though the child window is opened as a Modal Window.This is only happened when I double click on the Title Bar of the Parent Window.
If I try to click on any other part of the Parent Window except Title bar ... the child window is working as a Modal Window.
Can any one suggest me to solve this one !!

int this case, do this :
JFrame f = new JFrame("Authentification");
f.getContentPane().setLayout(new BorderLayout());
f.getContentPane().add(myJPanel, BorderLayout.CENTER);
f.setBounds(x,y,w,h);
f.setVisible(true);
Where myJPanel is the Panel you developped.

How to set a Swing component as Modal on a SWT Component?

How to set a Swing component as Modal on a SWT Componen?.I mean, I have a SWt Component window and from that window I am displaying a SWING Component Modal window.
The problem is my swing window is not working as Modal always.
When I opened the swing window from SWT window,swing window is working as Modal.But if Idouble click on Menubar or Title bar of the SWT Window then my Swing window goes back.If I click on any other part of the SWT window.. then once again Swing window is working as modal.
Can any one suggest me to solve this?
I think this is isuue related with Swing over SWT..

pradeep.rajadurai wrote:
I want set the JTable as a background of jframe or jinternalframe , how it is possible One way that may work, you can always extract the image from a rendered JTable and then paint the same image into the JPanel that holds your components via it's paintComponent method, then added the JPanel to the app's contentPane.
give me simple pgmIs English your second language? Because if so, please understand that this demand can be taken by some as rude.

What is a 'region tag'?

We just upgraded to the first service pack for MDM 5.5, and I'm starting to write some Java to play with the repository. There appears to be a CatalogData.Login method that let's you specify a min/max number of pooled connections - very handy! However, there's an additional parameter called a 'region tag'. Does anyone know what this is?
The API documentation is woefully inadequate in this respect. Calling a parameter a 'region tag', and then indicating in the documention that a region tag is the region tag to use for the repository isn't that useful.
Specifying a blank region tag generates this exception:
a2i.core.StringException: No matching region tag
     at a2i.common.CatalogData.LoadCatalogData(Unknown Source)
     at a2i.common.CatalogData.Login(Unknown Source)
     at com.xxx.dw.mdm.utils.ConnectionPool.getConnection(ConnectionPool.java:59)
Error code: 0x80000001     at com.xxx.dw.mdm.utils.Test.run(Test.java:26)
     at com.xxx.dw.mdm.utils.Test.main(Test.java:21)
Error message : No message for RC (0x80000001)
So: what's a region tag?

Hi Ken
There are two language parameters which you can specify when working with the API:
1)       The data language this is defined in the CatalogData.Login() function via the LanguageString/RegionTag parameter.
2)       The schema language this is defined with the function CatalogData.SetCodeRegion(), and must be called before CatalogData.Login(). If no schema language is defined, the schema language defaults to the data language.
e.g. CatalogData.SetCodeRegion(English [US])
The implications of this are as follows:
1)       The function GetName() of CMFieldInfo and CMTable info returns the data language name.
2)       The new function GetCode() of CMFieldInfo and CMTableInfo returns the schema language name.
3)       When referring to fields or tables by name, you MUST use the schema language name. For example, when adding field names to a ResultSetDefintion.
·         NB. 1) The function CatalogData.Login() will fail with ReturnCode = 6 (BAD_DATA) if you set a schema language for which not all table and field names exist.
·         NB   2) You cannot call CatalogData.SetCodeRegion() after logging into the catalog.

Swing component for awt.canvas

Hi,
Can anyone tell me the equivalent SWING component for awt CANVAS. I need it because i need to display only Images (nothing else) on it. If anyone can tell how I can do it.

JPanel is the Swing-equivalent of java.awt.Canvas, but if you are just displaying images, you can use the JLabel class, which supports use of images as icons (see also ImageIcon class).
Mitch Goldstein
Author, Hardcore JFC (Cambridge Univ Press)
[email protected]

What is clipping region of swing component

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