How to programmatically bring focus to a component

How can i programmatically bring focus to a component

[url http://java.sun.com/j2se/1.4.2/docs/api/java/awt/Component.html#requestFocus()]myComponent.requestFocus()

Similar Messages

  • Can someone explain how to set the focus to a component

    Hello,
    What is the best way to ensure that a component gets the focus with code. I have tried requestFocus and requestFocusInWindow and none of them seems to do there work. The frame containing the components that should get the focus is displayed, the component is focusable so that is not the problem. What I found out is that if the component is deep in a nesting of panes (where the top pane is in the frame) is that calling requestFocus or requestFocusInWindow does not give the component where this focus is called on the focus but either the pane that contains it, one of the parent panes of this pane or one of the components in these panes, in almost all cases the component requesting the focus does not get the focus at all. I always have to write a work around in defining a focus listener for all these panes that transfer the focus back to the component that requested the focus originally, I can't believe that this is the way to ensure that a component has the focus via code. I have searched for documentation but found nothing on what requestFocus(inWindow) is actually dooing (a lot about focus traversibility but I don't want to control this, just make sure that a component gets the focus).
    Again I'm pretty sure that the toplevel window is activated and that the component that requested the focus is focusable (I had created a derived version of the DefaultFocusManager that showed who has focus). Personally I think (and I'm not alone if you do a search in this forum on focus management) that there is either a big problem in the documentation of focus management or that it is still not possible to even try to set the focus on a component in a easy way.
    Marc

    Hello,
    thanks for your reply, here is some example code that illustrates the problem I have (the actual code is to big to show here, which is the raison why I did not posted it here). The code wil create a frame with a JPanel with a JTextField, a 'New' Jbutton and a 'Delete' Jbutton, a tabbed pane in the center ('New' will create a new JPanel, add it to the tabbed pane and set the focus on it, either by calling RequestFocusInWindow() directly or by calling it via InvokeLater (someone on this forum suggested to use this). I changed also the focusmanager to show the component that has the focus when you type something. To test compile and run the program (either with a call to requesteFocusInWindow directly or indirectly (by changing the comments), on my system I get the following behaviour:
    1. requestFocusInWindow called directly
    Start program en type, the tabbed pane has the focus
    Press New and type something, a button has the focus not the created panel
    Press New again and type something, a button has the focus not the created panel
    2. requestFocusInWindow be called indirectly
    Start program and type, the tabbed pane has the focus
    Press New and type, the created panel has the focus (I thought at one moment that I had found the solution there, but alas ...)
    Press New again and type something, a button has again the focus.
    Note that with my real program it is not always a button that will have the focus, sometimes it is a combobox or a TextField (I tried to get this with the example code (the JTextField) but did not succeed.
    Hopes this clarify the problem a little bid, what I want is when the window is visible to set focus on newly created panes (or in the real program on the panel that is selected via the tabbed pane or via a key combination to shift the focus between the panels) but requestFocusInWindow seems to behave unpredicatable. I can't imagine that what I see is a bug so I must make some assumptions which are not valid but I don't see them, btw listening on the WindowListener is I think not the solution because the frame is already displayed when I want to set the focus and I do not use a modal dialog box.
    The example code follows here
    Marc
    * Main.java
    * Created on December 21, 2004, 8:58 AM
    package testfocus;
    import javax.swing.*;
    import java.awt.*;
    import java.awt.event.*;
    * @author marc
    public class Main
    static int counter;
    /** Creates a new instance of Main */
    public Main()
    * @param args the command line arguments
    public static void main(String[] args)
    JFrame frm=new JFrame();
    JPanel content=new JPanel();
    frm.setContentPane(content);
    final JTabbedPane paneContainer=new JTabbedPane();
    JPanel bar=new JPanel();
    JButton create=new JButton(new AbstractAction("New")
    public void actionPerformed(ActionEvent ev)
    counter++;
    final JPanel pnl=new JPanel();
    pnl.setName("test"+counter);
    paneContainer.add(pnl);
    pnl.setFocusable(true);
    pnl.requestFocusInWindow();
    /* Either use this or the previous line
    SwingUtilities.invokeLater(new Runnable()
    public void run()
    pnl.requestFocusInWindow();
    JButton delete=new JButton(new AbstractAction("Delete")
    public void actionPerformed(ActionEvent ev)
    int i=paneContainer.getComponentCount()-1;
    if (i>=0)
    paneContainer.remove(i);
    JTextField dummy=new JTextField("Test");
    bar.add(dummy);
    bar.add(create);
    bar.add(delete);
    content.setLayout(new BorderLayout());
    content.add(bar,BorderLayout.SOUTH);
    content.add(paneContainer,BorderLayout.CENTER);
    frm.setSize(300,400);
    FocusManager.setCurrentManager(new DefaultFocusManager()
    public void processKeyEvent(Component component,KeyEvent ev)
    System.out.println("Focus owner"+getFocusOwner());
    super.processKeyEvent(component,ev);
    frm.setVisible(true);
    }

  • How do I bring "focus" to a window?

    I'm trying to improve my workflow in FCP and sometimes find myself a bit frustrated.
    For example, when I am in the Viewer window fiddling with filter parameters, I want to suddenly switch down to the Sequence in the Timeline window.
    On a PC I would press ALT-TAB, or TAB to cycle through the windows. But in FCP I have to leave the keyboard and pick up my mouse then click in the Timeline window.
    It slows me down a bit.
    Is there any shortcut like TAB in Windows that allows me to change window focus?
    Thanks,,

    when you say in point in the timeline, are you talking about the beginning of the clip on the sequence? Or do you have an in point set in the timeline. If you are just talking about being at the absolute beginning of ANY clip in the timeline, and you don't want to scrub the mouse and snap, just press the up arrow key. That will go backward one edit point. Down arrow will go forward one edit point. Clip beginnings and ends are all edit points, and this works on all tracks. So if you want to stay in one track, solo it.

  • How to set Focus for one component on Dialog

    Hi all.
    I have a problem and need a help
    I have a JDialog
    I add some components on it. Includes button, textfield...
    after i set
         _textField.requestFocus()When Dialog show, it always focus at first component, not at the component i set.
    Please help me.
    Thanks in advance
    Diego

    Perhaps Swings threading ruins your focus request, and trying invokeLater may be worthwhile...
    Note that [requestFocusInwindow()|http://java.sun.com/javase/6/docs/api/javax/swing/JComponent.html#requestFocusInWindow()] is to be preferred over requestFocus according to the API docs.
    Edited by: isocdev_mb on Mar 4, 2010 6:05 AM

  • How to get the focus at the end of text ?

    I am having applet with awt TextField component and some default text. (MSQ-)
    To have a focus to text field I am using :
    refnoTextField.requestFocus();
    But this gives focus at the biginning and not at the end of text. I want the focus at the end (i.e. after MSQ-)
    How to get the focus at the end of text ?
    any help ?
    manisha
    manisha

    public void focusGained(FocusEvent e) {
         if (e.getSource() == yourtextbox) {
         yourtextbox.setSelectedEnd(yourtextbox.getLength());
    try this thing - not sure if it'll work, but I figgured out how to apply it to my textareas for keeping the focus on the last line of the textarea..it might work for your textboxes..
    shrug

  • How to set the focus to the tabbed pane title?

    Dear Friends,
    I'm using tabbed pane (JTabbedPane) in my application. I have 2 tabbed panes and each contain some text fields and buttons.
    In first tabbed, I have 2 text fields, OK and Cancel buttons. I have to set the focus to the title of the tabbed pane after it lost focus from the Cancel button (focus has to move from Cancel button to tabbed pane title by pressing tab key).
    Could anyone please tell me how to set the focus to the tabbed pane title?
    Thanks in advance,
    Sathish kumar D

    Thanks for your reply.
    Could you please tell me how to set focus for title of the tabbed pane throug FocusTraversalPolicy?
    because usually we set the focus for the component by requestFocusInWindow().
    for example set focust to the button OK,
    btnOk.requestFocusInWindow()likewise could you tell me how to set focus to Title of the tabbed pane?
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  • How do I bring form fields to the front or back?

    I have a document with many form fields/push-buttons in order to create pup-up effects in an info graphic.
    So I use fields to create a mouse-over hot spot, and others that pop up. Now, of course, the hot spot must be in front (or on top), otherwise it gets distracted in it's mouse-over function by the popped-up object (image) that lays over it. (The result would look like a flashing effect, as you roll over the hot spot.)
    Now how do I arrange the fields?? Ich can arrange images and texts to come to the front or hide behind other objects. But in the form field editing mode there is no such option. Also it doesn't work to just cut and paste them, they re-appear in their former position, often behind the other fields.
    Please, help! Thanks, Peder

    Thanks, I will give it a try. To "recieve the focus" means being activated / hovered?
    Am 22.04.2015 um 18:49 schrieb George_Johnson:
    How do I bring form fields to the front or back?
    created by George_Johnson in PDF Forms - View the full discussion
    The tab order effectively sets the z-order, but if a field is not read-only it will be set to the front if it receives the focus.
    If the reply above answers your question, please take a moment to mark this answer as correct by visiting: https://forums.adobe.com/message/7465780#7465780 and clicking ‘Correct’ below the answer
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    When importing songs of a same album but different artist iTunes will separate the artists. How can I bring all together in the same album?

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  • Downloads page from tool has cleared, how do I bring it back?

    I tried to check my download list and delete one and the whole page disappeared. how do i bring it back?

    Ah, you're on a MAC - I'm afraid that I'm a windows man.
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    How to email text from a text component in my applet on a the host server, back to my email address ?
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  • How to get the focus in a Table Control

    Hello Experts,
                         I have a simple Table control in my screen . I want to know under which column my cursor is ? Basically i want to get the focus the table control . How can i achieve this  ?
    Thanks
    Vivek

    >
    Vivek Joshi wrote:
    > Hello Router ,
    >                      I do not want to set the focus , I want to get focus . User can click on any cell in the table and then press a button in the toolbar . Now in the event handler of the button i want to under which column User has set the focus .
    > I hope , I am clear now .
    > Thanks for your help
    > Regards
    > Vivek
    An yet you keep getting suggestions of how to set the focus.   I looked through the API documentation and I don't see anything that would suggest you can request to see where the current focus is.  Perhaps someone might still come along with a solution, but my hopes wouldn't be too high at this point.  I can pass the requirement onto Product Definition, as the use case does seem interesting.  Perhaps it is something we have even considered in the past. 
    But for now, there might be a better way to solve your problem.  It will probably mean redesign the interaction.  What exactly are your requirements?  Do you need to be able to get the data in a particular cell of table when a button is clicked?  Just throwing out some ideas here, but maybe just use the lead selection to select the row, but then have a button choice to choose the action associated with the column you want. A hack for sure - but it might work.  Also it doesn't help you right now, but in the near future update to NetWeaver 7.0, WDA does have a onColSelect event for the table.

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