New GUI components

Hi,
Is there any collection of fancy GUI components. Actually not really fancy, but kind of more advanced in new shapes. I'm trying to write an application. I need to create a table shape/spread sheet screen but the standard JTable is not exactly what I'm looking for.
Thanks,
S.

by real time I only mean that I don't know how many results I will have until the search is complete, so I can't create the components beforehand, I have to do it when I get a result, while the program is running. I couldn't get anything but text to show up like that, but I think a JTable will suit my needs perfectly.

Similar Messages

Using my new GUI component in an applet :Help!!!

I am seeking help for the following
Define class MyColorChooser as a new component so it can be reused in other applications or applets. We want to use the new GUI component as part of an applet that displays the current Color value.
The following is the code of MyColorChooser class
* a) We define a class called MyColorChooser that provides three JSlider
* objects and three JTextField objects. Each JSlider represents the values
* from 0 to 255 for the red, green and blue parts of a color.
* We use wred, green and blue values as the arguments to the Color contructeur
* to create a new Color object.
* We display the current value of each JSlider in the corresponding JTextField.
* When the user changes the value of the JSlider, the JTextField(s) should be changed
* accordingly as weel as the current color.
* b)Define class MyColorChooser so it can be reused in other applications or applets.
* Use your new GUI component as part of an applet that displays the current
* Color value.
import java.awt.*;
import javax.swing.*;
import javax.swing.event.*;
import java.awt.event.*;
import java.text.DecimalFormat;
public class MyChooserColor extends JFrame{
     private int red, green, blue; // color shade for red, green and blue
     private static Color myColor; // color resultant from red, green and blue shades
     private JSlider mySlider [];
     private JTextField textField [];
// Panels for sliders, textfields and button components
     private JPanel mySliderPanel, textFieldPanel, buttonPanel;
// sublcass objet of JPanel for drawing purposes
     private CustomPanel myPanel;
     private JButton okButton, exitButton;
     public MyChooserColor ()
          super( "HOME MADE COLOR COMPONENT; composition of RGB values " );
//       setting properties of the mySlider array and registering the events
          mySlider = new JSlider [3];
          ChangeHandler handler = new ChangeHandler();
          for (int i = 0; i < mySlider.length; i++)
          {     mySlider[i] = new JSlider( SwingConstants.HORIZONTAL,
                           0, 255, 255 );
               mySlider.setMajorTickSpacing( 10 );
               mySlider[i].setPaintTicks( true );
//      register events for mySlider[i]
               mySlider[i].addChangeListener( handler);
//      setting properties of the textField array
          textField = new JTextField [3];
          for (int i = 0; i < textField.length; i++)
          {     textField[i] = new JTextField("100.00%", 5 );
               textField[i].setEditable(false);
               textField[i].setBackground(Color.white);
// initial Background color of each slider and foreground for each textfield
// accordingly to its current color shade
          mySlider[0].setBackground(
                    new Color ( mySlider[0].getValue(), 0, 0 ) );
          textField[0].setForeground(
                    new Color ( mySlider[0].getValue(), 0, 0 ) );
          mySlider[1].setBackground(
                    new Color ( 0, mySlider[1].getValue(), 0 ) );
          textField[1].setForeground(
                    new Color ( 0, mySlider[1].getValue(), 0 ) );
          mySlider[2].setBackground(
                    new Color ( 0, 0, mySlider[2].getValue() ) );
          textField[2].setForeground(
                    new Color ( 0, 0, mySlider[2].getValue() ) );
// initialize myColor to white
          myColor = Color.WHITE;
// instanciate myPanel for drawing purposes
          myPanel = new CustomPanel();
          myPanel.setBackground(myColor);
// instanciate okButton with its inanymous class
// to handle its related events
          okButton = new JButton ("OK");
          okButton.setToolTipText("To confirm the current color");
          okButton.setMnemonic('o');
          okButton.addActionListener(
               new ActionListener(){
                    public void actionPerformed (ActionEvent e)
                    {     // code permetting to transfer
                         // the current color to the parent
                         // component backgroung color
                         //System.exit( 0 );
//      instanciate exitButton with its inanymous class
//      to handle its related events
          exitButton = new JButton("Exit");
          exitButton.setToolTipText("Exit the application");
          exitButton.setMnemonic('x');
          exitButton.addActionListener(
                    new ActionListener(){
                         public void actionPerformed (ActionEvent e)
                         {     System.exit( 0 );
// define the contentPane
          Container c = getContentPane();
          c.setLayout( new BorderLayout() );
//     panel as container for sliders
          mySliderPanel = new JPanel(new BorderLayout());
//      panel as container for textFields
          textFieldPanel = new JPanel(new FlowLayout());
//      panel as container for Jbuttons components
          buttonPanel = new JPanel ();
          buttonPanel.setLayout( new BoxLayout( buttonPanel, BoxLayout.Y_AXIS ) );
//add the Jbutton components to buttonPanel
          buttonPanel.add(okButton);
          buttonPanel.add(exitButton);
//     add the mySlider components to mySliderPanel
          mySliderPanel.add(mySlider[0], BorderLayout.NORTH);
          mySliderPanel.add(mySlider[1], BorderLayout.CENTER);
          mySliderPanel.add(mySlider[2], BorderLayout.SOUTH);
//add the textField components to textFieldPanel
          for (int i = 0; i < textField.length; i++){
               textFieldPanel.add(textField[i]);
// add the panels to the container c
          c.add( mySliderPanel, BorderLayout.NORTH );
          c.add( buttonPanel, BorderLayout.WEST);
          c.add( textFieldPanel, BorderLayout.SOUTH);
          c.add( myPanel, BorderLayout.CENTER );
          setSize(500, 300);
          show();
//     inner class for mySlider events handling
     private class ChangeHandler implements ChangeListener {
          public void stateChanged( ChangeEvent e )
// start by collecting the current color shade
// for red , forgreen and for blue
               setRedColor(mySlider[0].getValue());
               setGreenColor(mySlider[1].getValue());
               setBlueColor(mySlider[2].getValue());
//The textcolor in myPanel (subclass of JPanel for drawing purposes)
               myPanel.setMyTextColor( ( 255 - getRedColor() ),
                         ( 255 - getGreenColor() ), ( 255 - getBlueColor() ) );
//call to repaint() occurs here
               myPanel.setThumbSlider1( getRedColor() );
               myPanel.setThumbSlider2( getGreenColor() );
               myPanel.setThumbSlider3( getBlueColor() );
// display color value in the textFields (%)
               DecimalFormat twoDigits = new DecimalFormat ("0.00");
               for (int i = 0; i < textField.length; i++){
                    textField[i].setText("" + twoDigits.format(
                              100.0* mySlider[i].getValue()/255) + " %") ;
// seting the textcolor for each textField
// and the background color for each slider
               textField[0].setForeground(
                         new Color ( getRedColor(), 0, 0 ) );
               mySlider[0].setBackground(
                         new Color ( getRedColor(), 0, 0) );
               textField[1].setForeground(
                         new Color ( 0, getGreenColor() , 0 ) );
               mySlider[1].setBackground(
                         new Color ( 0, getGreenColor(), 0) );
               textField[2].setForeground(
                         new Color ( 0, 0, getBlueColor() ) );
               mySlider[2].setBackground(
                         new Color ( 0, 0, getBlueColor() ) );
// color of myPanel background
               myColor = new Color (getRedColor(),
                         getGreenColor(), getBlueColor());
               myPanel.setBackground(myColor);
// set methods to set the basic color shade
     private void setRedColor (int r){
          red = ( (r >= 0 && r <= 255) ? r : 255 );
     private void setGreenColor (int g){
          green = ( (g >= 0 && g <= 255) ? g : 255 );
     private void setBlueColor (int b){
          blue = ( (b >= 0 && b <= 255) ? b : 255 );
// get methods (return the basic color shade)
     private int getRedColor (){
          return red ;
     private int getGreenColor (){
          return green;
     private int getBlueColor (){
          return blue;
     public static Color getMyColor (){
          return myColor;
// main method
     public static void main (String args []){
          MyChooserColor app = new MyChooserColor();
          app.addWindowListener(
                    new WindowAdapter() {
                         public void windowClosing( WindowEvent e )
                         {     System.exit( 0 );
// inner class CustomPanel for drawing purposes
     private class CustomPanel extends JPanel {
          private int thumbSlider1 = 255;
          private int thumbSlider2 = 255;
          private int thumbSlider3 = 255;
          private Color myTextColor;
          public void paintComponent( Graphics g )
               super.paintComponent( g );
               g.setColor(myTextColor);
               g.setFont( new Font( "Serif", Font.TRUETYPE_FONT, 12 ) );
               DecimalFormat twoDigits = new DecimalFormat ("0.00");
               g.drawString( "The RGB values of the current color are : "
                         + "( "     + thumbSlider1 + " , " + thumbSlider2 + " , "
                         + thumbSlider3 + " )", 10, 40);
               g.drawString( "The current background color is composed by " +
                         "the folllowing RGB colors " , 10, 60);
               g.drawString( "Percentage of RED from slider1 : "
                    + twoDigits.format(thumbSlider1*100.0/255), 10, 80 );
               g.drawString( "Percentage of GREEN from slider2 : "
                    + twoDigits.format(thumbSlider2*100.0/255), 10, 100 );
               g.drawString( "Percentage of BLUE from slider3 : "
                    + twoDigits.format(thumbSlider3*100.0/255), 10, 120 );
// call to repaint occurs here
          public void setThumbSlider1(int th){
               thumbSlider1 = (th >= 0 ? th: 255 );
               repaint();
          public void setThumbSlider2(int th){
               thumbSlider2 = (th >= 0 ? th: 255 );
               repaint();
          public void setThumbSlider3(int th){
               thumbSlider3 = (th >= 0 ? th: 255 );
               repaint();
          public void setMyTextColor(int r, int g, int b){
               myTextColor = new Color(r, g, b);
               repaint();
//The following method is used by layout managers
          public Dimension getPreferredSize()
          {     return new Dimension( 150, 100 );
The following is the code of application that tests the component
//Application used to demonstrating
// the homemade GUI MyChooserColor component
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class ShowMyColor extends JFrame {
     private JButton changeColor;
     private Color color = Color.lightGray;
     private Container c;
     MyChooserColor colorComponent;
     public ShowMyColor()
     {     super( "Using MyChooserColor" );
          c = getContentPane();
          c.setLayout( new FlowLayout() );
          changeColor = new JButton( "Change Color" );
          changeColor.addActionListener(
                    new ActionListener() {
                         public void actionPerformed( ActionEvent e )
                         {     colorComponent = new MyChooserColor ();
                              colorComponent.show();
                              color = MyChooserColor.getMyColor();
                              if ( color == null )
                                   color = Color.lightGray;
                              c.setBackground( color );
                              c.repaint();
          c.add( changeColor );
          setSize( 400, 130 );
          show();
     public static void main( String args[] )
     {     ShowMyColor app = new ShowMyColor();
          app.addWindowListener(
                    new WindowAdapter() {
                         public void windowClosing( WindowEvent e )
                         { System.exit( 0 );

Yes, I want help for the missing code to add in actionPerformed method below. As a result, when you confirm the selected color (clicking the OK button), it will be transferred to a variable color of class ShowMyColor.
// instanciate okButton with its inanymous class
// to handle its related events
          okButton = new JButton ("OK");
          okButton.setToolTipText("To confirm the current color");
          okButton.setMnemonic('o');
          okButton.addActionListener(
               new ActionListener(){
                    public void actionPerformed (ActionEvent e)
                    {     // code permetting to transfer
                         // the current color to the parent
                         // component backgroung color
                         //System.exit( 0 );
          );

Event handling in custom Non-GUI components

I have a class which needs to fire events to outside. These events maybe captured by several objects in outside world. How can I achieve this? In so many places I read, they always refer to AWT and Swing whereas my objects don't have any dependency to GUI.
I simply need to fire an event from an object, and capture that event from other objects by registering event handlers.
I have experience in .Net programming with Events and Delegates (function pointers), but cannot find something like that in Java. All it offers is various kinds of GUI related Listeners where I can't find a proper help resource using them in Non-GUI components.

ravinsp wrote:
I have a class which needs to fire events to outside. These events maybe captured by several objects in outside world. How can I achieve this? In so many places I read, they always refer to AWT and Swing whereas my objects don't have any dependency to GUI.
I simply need to fire an event from an object, and capture that event from other objects by registering event handlers.
I have experience in .Net programming with Events and Delegates (function pointers), but cannot find something like that in Java. All it offers is various kinds of GUI related Listeners where I can't find a proper help resource using them in Non-GUI components.If you want to make your own Listener make your Listener. Create an event class that encapsulates the event as you want, create a listener interface that has a method like handleMyEvent(MyEvent me) and then add addMyEventListener, removeMyEventListener methods to your original class. Add a List<MyEvent> to your original class and add the listeners to it and then when events happen
MyEvent someEvent = new MyEvent();
for(MyEventListener mel : eventlisteners)
mel.handleMyEvent(someEvent);

Save GUI components in a XML format

I am looking for a technoology that can help to create a my own file format using java. That mean currently im working with implementing a mind mapping tool (like mindjet) which will help to do basic mind mapping actions like add, edit, delete topics.
But I have faced for a ig problem when im saving a created map. because it should save as a new file format and should be able to re-open for editing.
What I planned is to retrive the GUI component's(elements of the map) properties from the map and write those values to the XML file(using XML DOM or SAX). Then read those saved values and create the GUI components under retrieved data.
what I want to know is that. Is my approach is correct? or is there any better solution for this matter?
please clarify me and I would really appreciate your help?
Regards
Lakshitha Ranasinghe

You presumably have some state, in memory, that you want to persist. From your post, though I must confess that the terms you use are not really clear in terms of what type of data you actually want to say, my guess is that you have some graph of objects in memory that you have parsed that you want to serialize and persist and then later deserialize and restore for reuse in a subsequent execution of your program.
If yes, then your goal is really simple: how do I save the state of my application and then restore it?
Go to the filesystem: store as a properties file (key-value pairs), Java's default serialization, XML or a totally custom format
Go do the database: map your object to a proper database table and column (via JDBC or an O/R mapper ala Hibernate), or store what you would have stored in the filesystem in a databaseXML is a valid option. So is a simple properties file. It depends on your requirements. If you are reading from and writing to a Java application, and frequent versioning is not an issue, then Java's default serialization could be a possibility. Going to the database would be the 'enterprise' solution, but requires testing and the successful functioning and communication between two technologies and machines. It depends on your requirements.
- Saish

Adding custom GUI components to a panel

<sorry about the 'Hello All' subject in the previous post>
I am creating a Backgammon game for my JAVA programming class. I would like to design a board and have certain checker pieces that can be dragged around on the board. In the course I am taking, I still have not been able to understand how a GUI interface has GUI components that is "custom built" like my checker class. My checker class below draws a picture of a checker on a JPanel. I want it to exist inside a JPanel(that has a board painted in it) with 30 checkers that can be moved around. Any feedback would be appreciated including helpful packages, classes, trails, etc.
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.util.Random;
import javax.swing.JPanel;
import java.awt.BasicStroke;
// Checker.java - This will draw the checkers used in the game
public class Checker extends JPanel
private Color checker_color; // color of checker
private int abs_pos;
private int player; // player 1 or player 2
Checker(Color check_color, int pos, int plyr)
     checker_color = check_color;
     abs_pos = pos;
     player = plyr;
public void paintComponent(Graphics g)
     super.paintComponent(g);
     Graphics2D g2d = (Graphics2D) g; // cast g to Graphics2D
     this.setBackground(Color.WHITE);
     // make a circle
     g2d.setColor(checker_color);
     g2d.setStroke(new BasicStroke(1.0f));
     g2d.fillOval(47,47, 35, 35);
     g2d.setColor(Color.BLACK);
     g2d.setStroke(new BasicStroke(2.0f));
     g2d.drawOval(47, 47, 35, 35);
public int getPlayer(){
     return player;
public Color getCheckerColor(){
     return checker_color;
public int getPosition(){
     return abs_pos;
public void setPosition(int pos){
     abs_pos = pos;
}

Um... pretty much the way you are doing it in the code you already posted. What is the problem? Not that there's not problems....
1) setBackground called in paintComponent doesn't do much. Just set the background outside paint and super.paintComponent() will fill the BG color if the component isn't opaque.
2) a checker, I would expect, would be opaque, actually.
3) the oval size you draw would probably be better off being based on the size of the component (getSize()) instead, that way it scales easily.
But other then that, you are doing it right. You probably need to set the size and location of each checker object explicitly, since most likely it's being used in a container with a null layout.

Initializing JDialogs or Other GUI Components within SwingWorker

Hello Every one,
I have been using SwingWorker class heavily in my application and recently I noticed that If I click on a button twice or thrice the third or 4th it takes more time to perform the action in which SwingWorker is being used. So I started reading more about SwingWorker and after reading number of articles and posts on this forum I believe I am not using SwingWorker correctly. But, I am not still sure ( or may be I am afriad or I am not ready to change my code in so many files and so many locations :(
So I thought to ask some gurus following questions, in this forum before I proceeed with the code refactoring.
Question 1:* I am performing GUI operations in doInBackground() is it ok to perform swing operations or create swing components in this method of SwingWorker?
Example Code :
jbtnModifyUser Action Event
private void jbtnModifyUserActionPerformed(java.awt.event.ActionEvent evt) {
setButtonsState(false);
final SwingWorker worker = new SwingWorker() {
protected Object doInBackground() {
try {
openUserModifierDialog(SELECTED_PROFILE);
} catch (Exception ex) {
ex.printStackTrace();
} finally {
return null;
public void done()
setButtonsState(true);
worker.execute();
}Open Dialog Method wich I call from several other Swing Components Action performed event
private void openUserModifierDialog(UserProfile profile) throws ServerException {
UserModifierDialog modifier = new UserModifierDialog(_frame, true, profile);
modifier.pack();
modifier.setVisible(true);
if (modifier.isModified()) {
resetFields();
populateUserTable();
} If I click 3 to 4 times same button the 4th or 5th time the dialog opens after soem delay like 10 seconds. But in first two three click it opens quickly like in 2 to 3 seconds. Is it due to the fact that I am perfoming Swing GUI operations in doInBackgroundMethod()?
Question 2: Should I use EventQueue.invokeLater() but as far as I have learned from the articles, the actionPerformed events already run on EDT.
Question 3:_ Each dialog has multiple swing components like combo boxes, tables, tress which it populates after fetching data from the Database in its constructor. It takes like 1 to 2 seconds to bring data and initialize all swing components. Once the Dialog is initialized in the constructor I call my own function to set the existing user details ( As shown below ).
I need to set all the details before I show the Dialog to the user. To achieve this what is the best practice? Where should I use SwingWorker in current scenario? in Dialog's PostInitialize()? In Dialog's Constructor()? or in the Frame's openModifierDialog()?
public UserModifierDialog(java.awt.Frame parent, boolean modal, UserProfile userprofile)
throws ServerException {
super(parent, modal);
if (userprofile != null) {
SELECTED_USER_PROFILE = userprofile;
}else{
//throw new Exception("Invalid user record. User profile cannot be null. ");
initComponents();
postInitialize(); // my function called to set the user details on the screen
private void postInitialize() throws ServerException {
_userManager = new UserManager();
initializeAllPermissions();
initializeUserGroups();
setFields(SELECTED_USER_PROFILE);
private void initializeUserGroups() throws ServerException {
_jcbUserGroup.removeAllItems();
_jcbUserGroup.setModel(new ArrayListModel(_userManager.getAllUserGroups ()));
_jcbUserGroup.setSelectedIndex(0);
private void setFields(Userprofile profile) throws ServerException{
_jlblUserID.setText(profile.getUserid().toString());
_jtfUserName.setText(profile.getUsername());
_jtfFirstName.setText(profile.getFirstname());
_jtfLastName.setText(profile.getLastname());
_jtfPassword.setText(profile.getPassword());
_jtfConfirmPassword.setText(profile.getPassword());
_jtaDescription.setText(profile.getDescription());
_jcbUserGroup.setSelectedItem(_userManager.getUserGroup(profile.getUserGroupID()));
} Question 4: I noticed that if I use following code in my openModifierDialog function to execute the worker rather then its own execute method the dialog opens quickly each time.
Is it good idea to use the following to execute a SwingWorker or I shouldn't as I may fall in some threading issues later on which I am not aware of?
Thread t = new Thread(worker);
t.start();Hope to hear some useful comments / answers to my queries.
Thanks in advance.
Regards

Thanks for your prompt reply and answers to my queries.
Well, I know there are enormous faults in this code. Thats why I am seeking guru's advice to clean the mess. Let me give you breif background of the code. The current code was written by some one else using old version of SwingWorker and I am just trying to clean the mess.
All the JDialog or Swing Components intialization code was in construct() method of previous SwingWorker. Later on when the SwingWorker became the part of Java SE 6 all application code was refactored and the GUI components initialization was moved to the new function doInBackground().
The sample code represents the current condition of the code. All I needed was a shortcut to clean the mess or to avoid changes at so many places. But it seems that there is no easy workout for the current situation and I have to change the entire application code. I have gone through the SwingWorker API and tutorial @ [http://java.sun.com/developer/technicalArticles/javase/swingworker] and I am doing following to clean this mess.
Well the following code is proposed refactoring of the previous code. Hope to hear your comments on it.
private void jbtnModifyUserActionPerformed(java.awt.event.ActionEvent evt) {
try{
openUserModifierDialog(SELECTED_PROFILE);
} catch (Exception ex) {
logger.error(ex);
//show some message here
} finally {
private void openUserModifierDialog(UserProfile profile) throws ServerException {
UserModifierDialog modifier = new UserModifierDialog(_frame, true, profile);
modifier.pack();
modifier.setVisible(true);
if (modifier.isModified()) {
resetFields();
//UserModifierDialog Constructor
public UserModifierDialog(java.awt.Frame parent, boolean modal, UserProfile userprofile)
throws ServerException {
super(parent, modal);
if (userprofile != null) {
SELECTED_USER_PROFILE = userprofile;
} else {
//throw new Exception("Invalid user record. User profile cannot be null. ");
initComponents();
postInitialize(); // My function called to set the user details on the screen
private void postInitialize() {
_userManager = new UserManager();
setCursor(java.awt.Cursor.getPredefinedCursor(java.awt.Cursor.WAIT_CURSOR));
final SwingWorker worker = new SwingWorker() {
protected Object doInBackground() {
try {
return _userManager.getAllUserGroups(); //returns ArrayList of all user groups from database
} catch (ServerException ex) {
//Show Message here
return null;
protected void done() {
try {
if (get() != null) {
_jcbUserGroup.setModel(new ArrayListModel((ArrayList) get()));
_jcbUserGroup.setEditable(false);
setFields(SELECTED_USER_PROFILE);
else
//show some error to user that data is empty
} catch (InterruptedException ex) {
//show message here
} catch (ExecutionException ex) {
//show message here
} finally {
setCursor(java.awt.Cursor.getPredefinedCursor(java.awt.Cursor.DEFAULT_CURSOR));
worker.execute();
private void setFields(Userprofile profile) throws ServerException {
_jlblUserID.setText(profile.getUserid().toString());
_jtfUserName.setText(profile.getUsername());
_jtfFirstName.setText(profile.getFirstname());
_jtfLastName.setText(profile.getLastname());
_jtfPassword.setText(profile.getPassword());
_jtfConfirmPassword.setText(profile.getPassword());
_jtaDescription.setText(profile.getDescription());
_jcbUserGroup.setSelectedItem(_userManager.getUserGroup(profile.getUserGroupID()));
}In some places where data is way too huge I am going to use process and publish methods of SwingWorker.
Now I have another question, how I can notify/throw any exceptions occured inside SwingWorker doInBackground method or done method to the function who executed SwingWorker. Currenlty I am catching the excpetions in the done method and showing a dialog box. But I want to throw it to the postInitialize method the method who created and executed the Worker. What is the best practice of handling exceptions in SwingWorker methods.
Do you see any problems in proposed refactoring?
Hope to hear your comments.
Regards

GUI components not clearing from JDialog closing

Greetings,
I have developed an application which works on several different computers with several different JVMs, but which does not operate as anticipated on my (new) tablet PC. It leaves GUI components on the main JFrame from various Jdialog boxes (after closing them) that I throw at the user when the program starts.
I also have a username/password prompt at the beginning which is another JFrame that doesn't appear correctly. The input areas do not appear with a white background and the Username and Password JLabels have echoed themselves into that area.
I'm guessing this is Windows XP, Tablet Edition issue. I'd like to know if anyone else has experienced anything similar?
FYI, this programs works quite well on Windows 98, Windows XP Home and Professtional, Windows 2000, and Windows ME.
Any help would be most appreciated.
Regards

Hi all,
I am trying to develop a Java application on the Tablet PC. I am new to this platform and could not find much information about Java related Tablet PC development .So I am posting this question here
Details
I have developed a Swing Application in Java (J2SDK 1.4.2) for a Client, which currently runs on Windows XP on the Standard Laptop. The application uses the following
1) Menus
2) Panels
3) Dialogs
It consists of an entry form, which is saved as an XML file on the user's computer. Also it uses an Access Database.
The other thing that the application uses is a Signature Capture Device to capture a user's signature
I would like to move this application to the Tablet PC.
I have the following questions
1) What SDK do I use for the Tablet PC? Also what version of Java web start and Run time?
2) What kind of changes do I need to make in my application?
3) Can I make use of the "Ink" feature, which is provided with a Tablet PC in Java?
4) Where can I find user samples if any for Java Tablet PC development?
BTW I am using Toshiba Prot�g� 3500 for my project.
Thanks,
Raja

GUI Components & Graphical drawings

Hi,
I�m new to Swing (haven�t done much GUI since Motif!) and I�m a little confused about the relationship between GUI components and �drawn� graphics.
In my application I have two JPanels � an upper and a lower � that display two views of the same data,
In both of these JPanels I do my graph drawing using g.drawXXX() or g.fillXXX().
I label the displays using g.drawString()
However, I want to add some checkboxes to one of the JPanel displays that will trigger actions in the other JPanel. I�m not sure how to get the checkboxes to show up in the right place. It feels like the GUI components work in Layout mode whereas the graphics are in x,y coordinate space.
I see that JComponent has setLoaction / setBounds methods � but I�ve not had any joy with these so far.
I can see that I could create my own JComponent subclass that has the GUI and the graphics area and this could use a Layout to line things up.
Basically � can I draw GUI components at an x,y coordinate on a JPanel?
If this sounds like bad practice I�d welcome any sources of reference.
Many thanks.

Hi,
My question probably sounds more complicated than it is owing to my inexperience with Swing. I'm sure what I'm after is done thousands of time in other apps.
Bascially I have two set of graphs -
One is pure graphical (plotting stock prices etc.).
The other contains horizontal "bar" format data that lines up below the stock price graph
(Again see latest posting here : http://www.chriswardsweblog.blogspot.com/)
What I'm after is to have some controls at the right hand end of each bars. Presently I would imagine these to be a JCheckBox and maybe a JLabel to replace the g.drawString() rendered label in the screenshot.
The reason I want this is that the upper graph area shows a plotted view of the bar data. I want to be able to check/uncheck the box to see the plotted quote lines turn on/off.
I am pretty sure that I need to divide that lower JPanel into a "Graphical" panel for the bars and a "Component" panel for the controls. That feels like the correct thing to do - I just wanted someone to confirm I wasn't getting the wrong end of ths stick.
If this is the case - I think I need to sort out what Layout I should use that will allow me to get the JCheckbox & JLabel to line up with the bars. I have been look at the Box layout which would seem to allow me to do that.
I have another open question in this forum about how to toggle the visibilty of the upper panel quote lines - maybe that's where I need a Glass Panel?
Does this clarify things?
Thanks for all help.

How to create a array of GUI components?

Hello, everyone!
I need help or advice how to create an GUI components array. As I remenber in VB this possible just by calling two or more buttons (for example) with the same name. The API will authomatically create an array: Buton[0], Button[1], Button[2] and so on...
In Java it possible as well:
JButton button[];
button = new JButton[10];
for ( int i = 1; i < 10; i++ ){
button[i] = new JButton();
....and so on....
But my problem is that I use Forte for Java v. 3.0 and when I using Frame Editor it does not allow me to call two components with the same name and at the same time does not allow to change the initialization code painted in blue color...
Does anyone knows how to avoid this, or how to create GUI components array in Forte for Java API using Frame Editor or Component Inspector???
All that I need is few buttons accessible by index ( button[1], button[2] etc.) I will apreciate any help or advise.
Thank you in advance,
Michael

I tried using Forte after having used Windows notepad and found that I
like notepad much better. If you seem to be having problems with Forte,
you might just try writing this portion of code in a regular text editor
and compiling it with a command line compiler. Hope this helps some.

Can I make a class holding multiple GUI components and make it visible?

I am implementing an MDI where the different JInternalFrames are filled with a JPanel with components. Since the contents of my screen is dynamically generated, each screen can have multiple Jlabels, JTextFields, etc.
So I thought, I make a class containing the representation of one row of GUI components on my screen, which is: one JLAbel and 4 JTextFields.
Here is the code which adds the components to the panel:
// create panel
JPanel qpanel = new JPanel();
qpanel.setLayout(new BoxLayout(qpanel, BoxLayout.Y_AXIS));
qpanel.add(Box.createVerticalStrut(5));
//add rows to panel
for( int i = 0; i < nrRows; i++)
// qpanel.add(new JLabel("Hello how are you"));
qpanel.add(new ProcessRow("hello","how","are","you"));
// add panel to scrollpanel
this.getViewport().add(qpanel);
Here is the ProcessRow class:
public class ProcessRow extends JComponent
public JLabel rowLabel = null;
public JTextField myCost = null;
public JTextField saratogaCost = null;
public JTextField sapCost = null;
public JTextField totalCost = null;
public ProcessRow() {
super();
public ProcessRow(String LABEL,
String DEFAULTCOST,
String SARATOGACOST,
String SAPCOST){
super();
JLabel rowLabel = new JLabel(LABEL);
JTextField myCost = new JTextField(DEFAULTCOST, 6);
JTextField saratogaCost = new JTextField(SARATOGACOST, 6);
JTextField sapCost = new JTextField(SAPCOST, 6);
JTextField totalCost = new JTextField(6);
If I add the label "Hello how are you" directly to the panel, it shows fine but if I use my ProcessRow class, nothing shows.
How can I make it visible and if not,
how can I dynamically keep adding all these GUI components without loosing control over the components.
Thanks,
Johnny

Modify your ProcessRow:
(1) First extends JPanel ( Container, not Component)
(2) Add Label and TextField to the container
public class ProcessRow extends JPanel
public JLabel rowLabel = null;
public JTextField myCost = null;
public JTextField saratogaCost = null;
public JTextField sapCost = null;
public JTextField totalCost = null;
public ProcessRow() {
super();
public ProcessRow(String LABEL,
String DEFAULTCOST,
String SARATOGACOST,
String SAPCOST){
super();
JLabel rowLabel = new JLabel(LABEL);
JTextField myCost = new JTextField(DEFAULTCOST, 6);
JTextField saratogaCost = new JTextField(SARATOGACOST, 6);
JTextField sapCost = new JTextField(SAPCOST, 6);
JTextField totalCost = new JTextField(6);
// add everything to the container.
add(rowLabel);
add(myCost);
add(sapCost);
add(totalCost);
}

Can not see the menu of New Business Components Package in jdeveloper

I am just follow the developer guide.
and when I create the Business Components Package, the guide said that
========================================
In the JDeveloper Navigator, select the OA Project where you want to create your package.
From the main menu, choose File > New to open the New Object Gallery.
In the Categories tree, expand the Business Tier node, and select Business Components (BC4J).
In the Items list, select Business Components Package to open the Business Components Package Wizard. You can also right-click on the OA Project and select New Business Components Package to navigate directly to the Business Components Package Wizard.
=====================================
In fact I can not see the menu about Business Components (BC4J) in the File/new/buisness tier/Business Components (BC4J).
I can only see the File/new/buisness tier/ADF Business Components.
And can not find the "Business Components Package" under ADF Business Components either.
I am using the JDev Extension for OA (p5856648_R12_GENERIC.zip) and EBS 12.0.0.
And I create an OA Workspace and OA Project.
can anyone help?

James,
Use search facility on forum. Chk thread Re: OAF Toolbox Tutorial Help - Search
--Shiv

SAPgui.exe is running even after closing the GUI components

Hello All,
Even after closing the SAP GUI components like Bex, WAD or RSA1 etc... i am able to see these processes are running under the Task Manager--> Processes....
even if i try to restart the system, error messages are occuring...saying that SAP is still opend...
Why it is happening, any ideas?
Thanks,
Ravi

Hi Dirk,
Thanks for your infomation. Infact, apart from this problem, i have the problem with saving the webtemplate. As it is taking much time to save a template after modifications, i had to terminate the wad process. It seems above 2 problems are related....any ideas?
Thanks
ravi
Message was edited by: Ravi Pasumarty

Customer gui components needed?

I require to build a program with which allows the user to add representations of objects onto the main GUI by adding a seperate square for each object. each square should be capable of being moved, resized, deleted as well as have text displayed in it, and another object associated with it (but I'm currently just dealing with the GUI side of things). Each square will also need to be connected to others by means of an arrow from one square to another. Any suggestions as to where to start as there does not seem to be any appropriate widgets provided by java for this and I am having trouble finding stuff on the net about it. Will creating my own custom GUI components be the best option? If so any tips on how to do this?
Regards

Hello Ravi,
Create a Variable for 0CALMONTH, and use this code,
' Declare this in the top
data : v_startmon(6) type n,
v_endmon(6) type n,
' Include this in the case statement
when 'VarName'.
' Step 2 will execute after the user Input
if i_step = 2.
v_year = sy-datum(4).
v_mon = sy-datum+4(2) - 1.
' If the month is Jan
IF v_mon = '00'.
CONCATENATE v_year '01' INTO v_startmon.
CONCATENATE v_year '01' INTO v_endmon.
ELSE.
CONCATENATE v_year '01' INTO v_startmon.
CONCATENATE v_year v_mon INTO v_endmon.
EndIF.
clear l_s_range.
l_s_range-low = v_startmon.
l_s_range-high = v_endmon.
l_s_range-sign = 'I'.
l_s_range-opt = 'BT'.
append l_s_range to e_t_range.
Endif.
Please see this for
[User Exits in SAP BW|https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/23f2f094-0501-0010-b29b-c5605dbdaa45]
[User Exit Examples|https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/6378ef94-0501-0010-19a5-972687ddc9ef]
Also see this
[Dependencies for Variables of Type Customer Exit |http://help.sap.com/saphelp_nw04/helpdata/en/1d/ca10d858c2e949ba4a152c44f8128a/content.htm]
Thanks
Chandran
Edited by: Chandran Ganesan on Mar 17, 2008 1:57 PM

Unique GUI Components

How do I go about creating my own Unique GUI Components.
For instance I would like to create a volume knob, that turns clockwise and couterclockwise.
Best regards,

Start off with extending JComponent, add methods for turning the knob, and have paintComponent show the turning knob. Add methods to be able to add listeners that you want. That should get you started.

Clearing GUI components displayed in a JFrame window

Hi Programmers and Developers,
Good day to y'all!
My application displays a number of GUI components on the screen. I intend to design a JButton that can clear the window of all these GUI components when it is clicked. Is there a method that can erase already displayed GUI's or is their a technique i can implement to achieve this??
Many Thanks and Merry Xmas!

You clear components the in much the same way that you added them
See Container.remove(Component)
You will of course want to call validate(); repaint() after removing a component.
Make a small dummy app to test this out.
You might also want to look at tjacobs.ui.util.ComponentMapper (which you can find in TUS). It may make finding the components you want to remove easier

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