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Thread: Can't edit JTextField from within a popup window

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    Default Can't edit JTextField from within a popup window

    In Java swing, I cannot edit a JTextField from within a popup window. The following code is a simple program that allows me to push a button and JTextField with the number 0 filled in appears. I want to be able to edit that 0 but I don't seem to be able to do it.

    import java.awt.*;
    import java.awt.event.*;
    import javax.swing.*;
     
    public class PopupTest {
        public static void main(String[] args) {
            final JFrame MainFrame = new JFrame();
    		MainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            final JPanel MainPanel = new JPanel();
    		MainPanel.setLayout(new BoxLayout(MainPanel,BoxLayout.Y_AXIS));
    		MainFrame.add(MainPanel);
    		final JLabel TheLabel = new JLabel("Test");
    		MainPanel.add(TheLabel);
    		final JButton PopUpButton = new JButton("Open PopUp");
    		MainPanel.add(PopUpButton);
    		PopUpButton.addActionListener(new java.awt.event.ActionListener() {
    			public void actionPerformed(java.awt.event.ActionEvent evt) {
    				JPanel PopUpPanel = new JPanel();
    				PopUpPanel.setLayout(new BoxLayout(PopUpPanel,BoxLayout.Y_AXIS));
    				PopupFactory factory = PopupFactory.getSharedInstance();
    				final Popup ThePopUp = factory.getPopup(MainPanel,PopUpPanel,40,40);
    				JTextField Text1 = new JTextField("0");
    				PopUpPanel.add(Text1);
    				ThePopUp.show();
    			}
    		});
    		MainFrame.pack();
    		MainFrame.setVisible(true);
        }
    }


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    Default Re: Can't edit JTextField from within a popup window

    Try giving the popup panel a preferred size, e.g:
    JPanel PopUpPanel = new JPanel();
    PopUpPanel.setPreferredSize(new Dimension(50,20));
    ...
    It wouldn't hurt to request focus for the text field while you're at it:
    ...
    ThePopUp.show();
    Text1.requestFocus();
    Last edited by dlorde; June 6th, 2011 at 11:11 AM.

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    Default Re: Can't edit JTextField from within a popup window

    Quote Originally Posted by dlorde View Post
    Try giving the popup panel a preferred size, e.g:
    JPanel PopUpPanel = new JPanel();
    PopUpPanel.setPreferredSize(new Dimension(50,20));
    ...
    It wouldn't hurt to request focus for the text field while you're at it:
    ...
    ThePopUp.show();
    Text1.requestFocus();
    I tried doing those things but it still would not work.

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    Default Re: Can't edit JTextField from within a popup window

    It works for me.
    I get a small window with a button, I press the button and get a white textfield with a 0. I can enter new data into the textfield.

    What does it do when you execute it? What OS and version of the JDK are you using?

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    Default Re: Can't edit JTextField from within a popup window

    Quote Originally Posted by Norm View Post
    It works for me.
    I get a small window with a button, I press the button and get a white textfield with a 0. I can enter new data into the textfield.

    What does it do when you execute it? What OS and version of the JDK are you using?
    I am using Windows Vista, NetBeans 6.9.1, and Java 1.6.0_23.

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    Default Re: Can't edit JTextField from within a popup window

    You forgot:
    What does it do when you execute it?

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    Default Re: Can't edit JTextField from within a popup window

    Quote Originally Posted by Norm View Post
    You forgot:
    What does it do when you execute it?
    I get a small window that has a button that says "Open Popup". When I click on that button, I get a text field with a "0" filled in. When I click on the "0" it moves to the left or the right slightly, but pushing backspace does not delete it and pushing additional characters does not print the new characters.

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    Default Re: Can't edit JTextField from within a popup window

    I just got it to work. Before, I was setting PreferredSize to 50,50, but it works when I set it to 50,20.

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    Default Re: Can't edit JTextField from within a popup window

    Quote Originally Posted by One View Post
    I just got it to work. Before, I was setting PreferredSize to 50,50, but it works when I set it to 50,20.
    I'm still having some similar problems with other programs. Is there a way to tell what sizes will work and what sizes will not work?

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    Default Re: Can't edit JTextField from within a popup window

    After some experimenting, I think the popup must be contained within and over the component.
    Try adding this:
    theFrame.setLocation(400, 300); // This causes edit to fail!!! Pop MUST be within component ???
    then adjust this until it works:
    final Popup thePopUp = factory.getPopup(MainPanel, popupPanel, 40, 40); // location ??

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    Default Re: Can't edit JTextField from within a popup window

    The popup must be contained within the frame's content pane borders otherwise it can't/won't get focus. If you resize the main frame so the popup pops up within the content pane, it will work. It's probably a good idea to give the frame a minimum size and set the popup coordinates relative to the frame X,Y position and height & width (allowing for caption & borders), rather than an absolute screen coordinate, so it will popup in a usable state wherever the frame is moved and/or sized.
    Last edited by dlorde; June 7th, 2011 at 04:35 AM.

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