JTabbedPane and focus

I use a jTabbedPane in order to make un chain progression in data collections.
I've searched in the functions and variables to know if it is possible to block
the user on the last TabbedPane if he start using the last TabbedPane.
I've placed previous and next buttons on each TabbedPane and i can disable these buttons,
but i can't disable the tabbedPane above.
I don't wish to use CardLayout for this (event if it is better for that), so if someone know how to
solve this problem, thanks in advance.

You can use JTabbedPane.setEnabledAt to set whether a particular tab is enabled or not. Just make a call to this with the code that enables/disables your previous and next buttons.
Hope this helps.

Similar Messages

JTabbedPane and focus problem.

Hello. I currently have a JTabbedPane which contains the various panels that make up different tabs. These tabs are extensions of panels, and are seperate classes imported into the class which contains my JTabbedPane and then added. The frame which conatins my JTabbedPane also has a button, which when pressed I wish it to look at the tab which is currently active, and call a method from the class which this tab refers to. The problem is that I don't know how to get my button to determine which tab is currently active. Any help will be gratefully recieved.

Use getSelectedComponent() or getSelectedIndex() of your JTabbedPane object.

JTabbedPane loosing focus when switching tabs

When there are tiered JTabbedPanes and focus in one of the children and the tabbed is switched focus will go to the first component in the frame.
Is there a work around to keep the focus at least on the jtabbedpane?
Is this a know bug? anyone heard of this before?
Googling: JTabbedPane focus didn't bring up anything helpful... is there something else I should be searching under?
Here is an example:
import javax.swing.*;
import java.awt.*;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
public class TabPaneTest extends JFrame {
    public TabPaneTest() {
        JButton focusStealer = new JButton("Look at me!");
        focusStealer.addFocusListener(new FocusListener() {
            public void focusGained(FocusEvent e) {
                System.out.println("I TOOK FOCUS! W00t!");
            public void focusLost(FocusEvent e) {
                //To change body of implemented methods use File | Settings | File Templates.
        JTabbedPane tabbedPane = createTabbedPane(0);
        getContentPane().add(focusStealer, BorderLayout.NORTH);
        getContentPane().add(tabbedPane, BorderLayout.CENTER);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(300, 200);
        setLocation(400, 200);
        setVisible(true);
    private JTabbedPane createTabbedPane(int deep) {
        deep++;
        JTabbedPane tabs = new JTabbedPane();
        for (int i = 0; i < 4; i++) {
            if (deep < 4) {
                tabs.add(i + ":" + deep + " - Focus", createTabbedPane(deep));
            } else {
                tabs.add(i + ":" + deep + " - Focus", new JTextField());
        return tabs;
    public static void main(String[] args) {
        new TabPaneTest();
}

When there are tiered JTabbedPanes and focus in one of the children and the tabbed is switched focus will go to the first component in the frame.
Is there a work around to keep the focus at least on the jtabbedpane?
Is this a know bug? anyone heard of this before?
Googling: JTabbedPane focus didn't bring up anything helpful... is there something else I should be searching under?
Here is an example:
import javax.swing.*;
import java.awt.*;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
public class TabPaneTest extends JFrame {
    public TabPaneTest() {
        JButton focusStealer = new JButton("Look at me!");
        focusStealer.addFocusListener(new FocusListener() {
            public void focusGained(FocusEvent e) {
                System.out.println("I TOOK FOCUS! W00t!");
            public void focusLost(FocusEvent e) {
                //To change body of implemented methods use File | Settings | File Templates.
        JTabbedPane tabbedPane = createTabbedPane(0);
        getContentPane().add(focusStealer, BorderLayout.NORTH);
        getContentPane().add(tabbedPane, BorderLayout.CENTER);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(300, 200);
        setLocation(400, 200);
        setVisible(true);
    private JTabbedPane createTabbedPane(int deep) {
        deep++;
        JTabbedPane tabs = new JTabbedPane();
        for (int i = 0; i < 4; i++) {
            if (deep < 4) {
                tabs.add(i + ":" + deep + " - Focus", createTabbedPane(deep));
            } else {
                tabs.add(i + ":" + deep + " - Focus", new JTextField());
        return tabs;
    public static void main(String[] args) {
        new TabPaneTest();
}

JTabbedPane - traversing focus through tabs

I would like to have focus traverse through tabs in a JTabbedPane. That is, when the focus is on the last component of a tab, hitting the key for forward focus traverse should bring up the next tab and focus on the first component on that tab. I'm already using a custom FocusTraversalPolicy on the panel containing the JTabbedPane, which handles focus traversal between the components on the tabs. This policy has no knowledge of which tab a particular component is on.
I was hoping calling requestFocusInWindow() would automagically focus that tab, but it doesn't. Needless to say, having the focus traversal policy cycle through all the components (including those in non-selected tabs) doesn't work, either. Is there an elegant way to do this, without resorting to listening to key events, watching for the TAB key, and switching to the appropriate tab?

Ok. here is my suggestion.
When the focus is going to be transferred to the other tab use tabpane.setSelectedComponent(nextPanel), it will trigger traverse policy once again, but we will catch the fact that current component is JPanel and transfer it further to our field.
Following code looks ugly:
order.add(tf1);
order.add(tf2);
parentsForward.put(p,tf1);
parentsBackward.put(p,b2);but this is a concept demonstration only, you can hide this piece inside TraversalPolicy implementation.
Here is the full code:
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
public class TabbedFocusExample extends JFrame {
    public TabbedFocusExample() throws HeadlessException {
        super("Tabbed Focus Test");
        setLayout(new FlowLayout());
        JPanel p;
        final JTabbedPane tp = new JTabbedPane();
        final JTextField tf1 = new JTextField(20);
        final JTextField tf2 = new JTextField(20);
        final JCheckBox cb1 = new JCheckBox("Option 1");
        final JCheckBox cb2 = new JCheckBox("Option 2");
        final JButton b1 = new JButton("Click me!");
        final JButton b2 = new JButton("Press me!");
     //stores real components, no container
     Vector<Component> order = new Vector<Component>();
     //stores (container,first_component_in_this_container) pair
        Map<Component,JComponent> parentsForward = new HashMap<Component,JComponent>();
     //stores (container,last_component_in_previous_container) pair
     Map<Component,JComponent> parentsBackward = new HashMap<Component,JComponent>();
        p = new JPanel(new FlowLayout());
        p.add(tf1);
        p.add(tf2);
        tp.addTab("Tab 1",p);
     order.add(tf1);
        order.add(tf2);
     parentsForward.put(p,tf1);
     parentsBackward.put(p,b2);
        p = new JPanel(new FlowLayout());
        p.add(cb1);
        p.add(cb2);
        tp.addTab("Tab 2", p);
     order.add(cb1);
        order.add(cb2);
     parentsForward.put(p,cb1);
     parentsBackward.put(p,tf2);
        p = new JPanel(new FlowLayout());
        p.add(b1);
        p.add(b2);
        tp.addTab("Tab 3", p);
     order.add(b1);
        order.add(b2);
     parentsForward.put(p,b1);
     parentsBackward.put(p,cb2);
     setFocusTraversalPolicy(new MyOwnFocusTraversalPolicy(order,parentsBackward,
                          parentsForward,tp));
        add(tp);
        pack();
        setDefaultCloseOperation(EXIT_ON_CLOSE);
    public static void main(String[] args) {
        new TabbedFocusExample().setVisible(true);
    public class MyOwnFocusTraversalPolicy     extends FocusTraversalPolicy   {
     private Vector<Component> order;
     private JTabbedPane tabbedPane;
     private Map<Component, JComponent> parentsForward;
     private Map<Component, JComponent> parentsBackward;
        public MyOwnFocusTraversalPolicy(Vector<Component> order,Map<Component,JComponent> parentsF,
                                   Map<Component,JComponent> parentsB,JTabbedPane jtb) {
            this.order = order;
         this.tabbedPane=jtb;
         this.parentsForward = parentsF;
            this.parentsBackward = parentsB;
        public Component getComponentAfter(Container focusCycleRoot,
                                           Component aComponent) {
          JComponent nextComp = parentsForward.get(aComponent);
          if(nextComp!=null){ //aComponent is Container return first component in this Container
               return nextComp;
                int idx = (order.indexOf(aComponent) + 1) % order.size();
          nextComp = (JComponent)order.get(idx);
          int indexCurrent = tabbedPane.indexOfComponent(((JComponent)aComponent).getParent());
          int indexNext = tabbedPane.indexOfComponent(nextComp.getParent());
          if(indexNext!=indexCurrent){ //if next Component sits in next tab go to next tab
               tabbedPane.setSelectedComponent(nextComp.getParent());
                return nextComp;
     //same stuff but in opposite direction
        public Component getComponentBefore(Container focusCycleRoot,
                                            Component aComponent) {
          JComponent prevComp= parentsBackward.get(aComponent);
          if(prevComp!=null){
               return prevComp;
                int idx = order.indexOf(aComponent) - 1;
                if (idx < 0) {
                      idx = order.size() - 1;
                prevComp = (JComponent)order.get(idx);
          int indexCurrent = tabbedPane.indexOfComponent(((JComponent)aComponent).getParent());
          int indexPrevious = tabbedPane.indexOfComponent(prevComp.getParent());
          if(indexPrevious!=indexCurrent){
               tabbedPane.setSelectedComponent(prevComp.getParent());
               return prevComp;
        public Component getDefaultComponent(Container focusCycleRoot) {
            return order.get(0);
        public Component getLastComponent(Container focusCycleRoot) {
            return order.lastElement();
        public Component getFirstComponent(Container focusCycleRoot) {
            return order.get(0);
}

JTabbedPane and InsertTab method

Hi at all!!!Sorry for my bad english!!
For a university project I want to implement a copy of notepad. Only I want to manage a more document and I think that it is possible through the JTabbedPane and it works.
But I don't know how I can implement a button that add/remove a tab during the runtime.
Is there someone that can help me???
thank u
giuliano

Your main window should have [AddNewTab] and [RemoveTab] buttons.
In their event handler, launch a dialog and accept required user inputs.
After you dispose the dialog, call JTabbedPane#add(), addTab() or remove().

JTabbedPane and removeTabAt() method

Hello,
I use in my application a JTabbedPane and i want allow the user to remove a tab of this JTabbedPane. When the JTabbedPane change i need to perform some traitement.
So i use a ChangeListener to be informed of all changes of my JTabbedPane.
But, when i removed a tab which is not in last or first position i'm not informed by the change.
Thanks for your help.
Guiguch

I had the same problem. I fixed it by overriding the remove() method to fire a StateChanged event:
tabbedPane = new JTabbedPane()
     public void remove(int tab)
          super.remove( tab );
          int after = getSelectedIndex();
          // The selected tab remained the same after this remove, consider
          // it a state changed
          if (after == tab)
               fireStateChanged();
};

[svn] 3079: Pop up and focus fixes.

Revision: 3079
Author: [email protected]
Date: 2008-09-03 10:53:07 -0700 (Wed, 03 Sep 2008)
Log Message:
Pop up and focus fixes.
QE: YES
Doc:
Checkintests: YES
Reviewer: Alex
Bugs: SDK-16669, SDK-15688
mx/events/SWFBridgeEvent.as
Add marshal() method. Update ASDoc.
mx/managers/FocusManager.as
Fix bug SDK-15688. Type coercion error fixed by moving to a common super class of IFocusManagerComponent and SWFLoader.
mx/managers/PopUpManagerImpl.as
Renaming.
airframework/src/mx/managers/WindowedSystemManager.as
mx/managers/SystemManager.as
Fix problems introduced from API scrub and fix an old problem activating A.2.2.
mx/managers/SystemManagerProxy.as
Override addEventListener() and removeEventListener() to also add listeners on the proxied SystemManager. This
allows the Proxy to get keyboard focus events that happen in the proxied SystemManager. Dispatch activate/deactivate messages to the sandbox root.
Ticket Links:
http://bugs.adobe.com/jira/browse/SDK-16669
http://bugs.adobe.com/jira/browse/SDK-15688
http://bugs.adobe.com/jira/browse/SDK-15688
Modified Paths:
flex/sdk/branches/3.0.x/frameworks/projects/airframework/src/mx/managers/WindowedSystemMa nager.as
flex/sdk/branches/3.0.x/frameworks/projects/framework/src/mx/events/SWFBridgeEvent.as
flex/sdk/branches/3.0.x/frameworks/projects/framework/src/mx/managers/FocusManager.as
flex/sdk/branches/3.0.x/frameworks/projects/framework/src/mx/managers/PopUpManagerImpl.as
flex/sdk/branches/3.0.x/frameworks/projects/framework/src/mx/managers/SystemManager.as
flex/sdk/branches/3.0.x/frameworks/projects/framework/src/mx/managers/SystemManagerProxy. as

I would suggest not to use JWindow but JPopupMenu! In
the JPopupMenu you can add any swing-components!
You can show the Popup in focusGained (ok, that is
not so user-friendly, in my opinion a shortcut would
do better!).
The Popup will hide automatically if you click with
the mouse somewhere else or hit escape.Thank you for the reply.
I'm still having problems. I'd prefer not to use a jpopupmenu, because I want to use that for something else. This was just going to be a simple list that would appear near the text field so user could have a list of options to choose from.
Focus gained on the textfield brings up the list. Selecting something on the list clears it (hides). This idea works well on the mac. But on the pc the jwindow keeps hiding behind the main frame ?
I have the following code
The windows is created as follows
listWindow = new JWindow(SwingUtilities.getWindowAncestor(this));
listWindow.getContentPane().add(pane);
listWindow.setVisible(false);
pane contains the jlist of values
Then the textfield is as follows
textField.addFocusListener(new java.awt.event.FocusAdapter() {
public void focusGained(java.awt.event.FocusEvent evt) {
if (showListWindow) {
if (!listWindow.isVisible()) {
Point los = getLocationOnScreen();
listWindow.setVisible(true);
listWindow.setLocation(los.x +580, los.y +75);
listWindow.pack();
listWindow.toFront();
textField().requestFocus();
I use a boolean showListWindow to decide when to show. Because I noticed that displaying the jlist and requesting focus to the textfield caused the focusGain to fire again.
Any ideas why the pc keeps the list hidden ? If I move the main frame I can see !

AWT and focusing on different windows

Hey guys.
I have a problem, I'm trying to set the focus a window but can't.
I have two windows A and B.
I also have a Events being picked up set on window A.
So the set of events are detailed as follows.
Window A display's and responds to events.
When a particular event occurs it loads up a new window (WindowB) and focus is given to that window.Wasn't a problem until we realised that there was a delay between Window A being displayed and Window B being displayed, enough to cause a problem.
So the code was changed like follows.
WindowB.pack();
WindowB.setVisible(true);
WindowA.setVisible(false);When it was changed to the above, we lost the ability to pick up keyboard events, as WindowA was still the window with focus.
I've had a look at the KeyboardFocusManager where it seems that focus can be change between components.
However is also states for method setGlobalFocusWindow() that it can only be set if it is in the same context.
Which it is not.
Is it possible to set focus to the window before the window has been set visible? Is KeyboardManager the right class to look at?
Sorry about the lack of code(It's spread in many directions and is sensitive)
Thanks for any help in advance

hello,
the following link may help: http://java.sun.com/j2se/1.4.2/docs/api/java/awt/doc-files/FocusSpec.html
wrappingduke

Web browser resets scroll position and focus when page load completes

when a page is loading, the scroll position of the page reverts to the top-left and focus in a form element is lost whenever an element or the whole page finishes loading
Post relates to: Pre p100eww (Sprint)

Possibly related to the OP's question, I wish we could get the composition page to scroll when typing a reply here on the forum (while using my Pre plus).
Quoting a reply fills half the text box, then once I reach the bottom of the box, I can't scroll any further downward to complete my reply...
WyreNut
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JTabbedPane and one Button for all Tabs

Hello everybody,
im new here an would say HELLOOO to everyone
So ive got an issue.
I am creating in "class A" tabs for a JTabbedPane. In "class B" i create the JTabbedPane and creat instances of class A and add them to the TabbedPane.
in Class B i also create a button, for save actions. When i click the button, a method "save()" will be called and read from every tab the Strings out of textfields.
My problem now is, that it dont work, i call the save method with the instance from the tab, but it dont getText() from the textfield.
For example:
//create an instance tab, parameter is the save file
Tab myTab = new Tab(file);
//other code
(Tab)myTab.save(); //here i eclipse cast to Tab automatically
the save-Method in class A (Tab):
save() {
sysout(texfield1.getText)
BTW how can i highlight code in this forum?

You can add syntax highlighting by going into the advanced editor, that will add a button for it. Unfortunately there are no quick code tags :/
After you find the button post your ACTUAL code. not just some random snippet which looks like your code. What you posted doesn't even compile.

JTabbedPane, and JPanel.

Hi im going thrue swing tutorials here on sun. And wonder a bit about hierarchy. I use JTabbedPane and every class have there own JPanel that i add to the extended JPanel. I show below with example.
In Main class
public JFrame mstFrame() {
        JFrame frame = new JFrame("Main Frame");
        JTabbedPane mstPane = new JTabbedPane();
        mstPane.addTab("Start", new StartPage());
        frame.add(mstPane);
        frame.setVisible(true);
        return frame;
    }In StartPage Class
public class StartPage extends JPanel {
    JPanel createProjectPanel = new JPanel(new GridBagLayout());
     GridBagConstraints c = new GridBagConstraints();
     JScrollPane createCustomerPane = new JScrollPane();
     c.gridy = 1; // second row
     c.gridx = 0; // first cell
     createProjectPanel.add(createCustomerPane ,c);
add(createProjectPanel);Does this destory the hierarchy, or is it okey to do it this way?

It makes sense to have each tab represented by a panel, so I don't reallly understand the question.
public class StartPage extends JPanel
    JPanel createProjectPanel = new JPanel(new GridBagLayout());
    add( createProjectPanel );However, it is unecessary to create a second panel since your class already extends JPanel. Just add the scrollPane directly to the class.
setLayout( new GridBagLayout() ):
JScrollPane createCustomerPane = new JScrollPane();
add(createCustomerPane, c);

My iphone6 camera is rear , and focus dosnt work in it , although my front camera is working great

My iphone6 camera is rear , and focus dosnt work in it , although my front camera is working great

Hey there Aydarezania,
It sounds like you are able to focus using the front camera, but the back one doesnt seem to. I would use these troubleshooting steps from the following article, named:
Get help with the camera on your iPhone, iPad, or iPod touch
Force the app to close, then open the Camera app again.
Restart your device, then open the Camera app again.
Your photos are blurred or out of focus
If your photos are blurred, out of focus, or have dark spots, try these steps:
Make sure that the camera lens is clean. If you need to clean the lens, use a microfiber cloth. If you see dirt or debris inside the lens, take your device to an Apple Retail Store or Authorized Service Provider for more help.
Make sure that there’s nothing blocking the camera lens. If you’re using a case, try removing it.
With iPhone 6 Plus, a metallic case or magnetic lens could interfere with optical image stabilization. If you have a metallic case or magnetic lens attachment, try taking a picture without it. Then compare the quality.
Adjust the focus by tapping on the person or object in the preview screen. You’ll see the screen pulse or briefly go in and out of focus as the camera adjusts. In photo mode, try to stay steady when adjusting the focus. If you move too far in any direction, the camera will automatically refocus to the center. In video mode, you can adjust the focus before you begin recording.
If the color seems too bright, or you see double-exposures of moving objects, make sure that HDR is set to Auto or Off. Tap HDR at the top of the screen to choose a different setting.
Thank you for using Apple Support Communities.
Cheers,
Sterling

Problem while adding both Key And Focus Listeners to JTextField

Hi!
I have something peculiar while adding Key and Focus Listener to JTextField. Suppose i add just Key Listener then everything's fine and i could keep track of keys being pressed. But as soon as i add a Focus Listener to it with the code to select full text in focusGained() method, it starts reponding wrongly to arrow keys pressed and does not perform desired actions. For let arrow key it moves caret by one for the first time after that it does not resond to that unless caret is changed by using mouse. If right arrow key is pressed the it moves the caret to last position from wherever it is. For UP and DOWN it selects the full text(This should be done when it gets focus)
public void focusGained(FocusEvent fe)
setCaretPosition(0);
moveCaretPosition(getDocument().getLength());
Can someone help me out on this?
thanks and regards,
Amit.

None of those things will cause your JFrame to resize itself. And this is probably a good thing, because your JFrame shouldn't change size once you have created it. Why not create your JPanel so that it has enough space for you to add the component later? Or why not just add the component to start with and then enable it or make it editable when you decide that's necessary?

What's focus-angle and focus-distance in CSS radial-gradients?

Reading the reference ( http://docs.oracle.com/javafx/2.0/api/javafx/scene/doc-files/cssref.html#typepaint ) I found these two values you can set in a radial-gradient definition:
radial-gradient([ *focus-angle* <angle>, ]? [ *focus-distance* <percentage>, ]? [ center <point>, ]? radius [ <length> | <percentage> ] [ [ repeat | reflect ], ]? <color-stop>[, <color-stop>]+)
Could someone enlighten me what they mean? I wrote a little tool for visual definition of Gradients (http://88.198.17.44/blog/2012/04/13/it-works-fxexperience-tools-gradienteditor-plugin/) as an extension to FXExperience Tools, and I'd like to include it if it makes sense.
Thanks
Toni

focus-angle and focus-distance are together used to determine the focal point of the radial pattern.
See this image: http://www.webdesign.org/img_articles/6822/gradient.jpg

Plazmic CDK 4.6 caret and focus button issues

I hope I'm posting in the right thread? This is regarding the Plazmic CDK 4.6 for Blackberry - to create your own themes.
Ok. I think I some what get the hang of Plazmic CDK 4.6 except for a few things.
I use ArcSoft PhotoStudio to make color changes to certain things. However, in the Today style, when I try to change the 'caret' color, which is that selection bar, no matter how much I resize it, it always looks really thick, almost covering the top of the 2nd line (see image below).
Also, when I try to change the focus circle, I open it with PhotoStudio and it changes the circle to this circle with a box around it, so when I try to change the color, it turns out like this (see picture below)
I also have issues with using a transparent background if I upload and make minor changes to an icon (see picture below). So I found this american flag icon, altered the pic to make the colors darker, then it adds this white background instead of keeping it transparent.
Is there a better program I could be using? Or any idea how to make these changes with this program? Or where can I find 'caret' and 'focus' icons so I don't have to worry about changing the colors.
Sorry if I sound confusing, hopefully someone understands what I'm saying?
Thanks!

you can only use Plazmik, sorry.
about transparency, when you use your drawing software and save the images, do you use a format that supports transparency ? There are two : GIF and PNG. All others add an opaque background color.
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JTabbedPane and focus

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