Making textTextField's and JPasswordField's Visible on Event

[dave_gardner]

I have come across what seems like it should be a trivial problem in my project:

I have set some of my fields on my GUI to invisible (with .setVisible(false);) in post-creation code. When I run the GUI the items are indeed invisible but when I click on my button which has myTextField.setVisible(true); nothing happens. I can get the button to print out something to the terminal everytime I click on it but I can work out how to make the fields appear upon user request.

Any help is greatly appretiated,

Regards,

Dave Gardner
3rd Year BSc Computer Science, University of Exeter

[camickr]

Post your SSCCE showing the problem.

[dave_gardner]

private void btnStartServerActionPerformed(java.awt.event.ActionEvent evt) {                                               
        
        System.getProperties().setProperty("java.rmi.server.hostname", txtHostname.getText());
        System.out.println("file:/" + txtServerDirectory.getText());
        System.getProperties().setProperty("java.rmi.server.codebase", "file:/" + txtServerDirectory.getText());

        String comport = txtComport.getText();
        boolean error = false;
        errorText.setText("");
        errorText.setVisible(false);

      
	    /* Set up server */
	    SpotlightsServer server = new SpotlightsServer();
            try {
                server.startController(comport);
            } catch (Exception e) {
                errorText.setVisible(true);
                errorText.setText("Cannot Find the Specified COM Port");
                error = true;
            }
}

On the errorText field. I use postcreation code (through properties in Netbeans) to do:

errorText.setVisible(false);

[camickr]

That is NOT a SSCCE.

[dave_gardner]

/*
 * TestFrame.java
 *
 * Created on 14-Mar-2010, 19:57:57
 */

//package BackEnd;

/**
 *
 * @author Dave Gardner
 */
public class TestFrame extends javax.swing.JFrame {

    /** Creates new form TestFrame */
    public TestFrame() {
        initComponents();
    }

    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {

        testTextField = new javax.swing.JTextField();
        testTextField.setVisible(false);
        makeVisibleBtn = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        testTextField.setText("Test");

        makeVisibleBtn.setText("Make Visible");
        makeVisibleBtn.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                makeVisibleBtnActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(158, 158, 158)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
                    .addComponent(testTextField, javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(makeVisibleBtn, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                .addContainerGap(153, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(74, 74, 74)
                .addComponent(makeVisibleBtn)
                .addGap(30, 30, 30)
                .addComponent(testTextField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(153, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>

    private void makeVisibleBtnActionPerformed(java.awt.event.ActionEvent evt) {
        testTextField.setVisible(true);
    }

    /**
    * @param args the command line arguments
    */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new TestFrame().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify
    private javax.swing.JButton makeVisibleBtn;
    private javax.swing.JTextField testTextField;
    // End of variables declaration

}

[Fubarable]

Don't forget to revalidate (and often to repaint) the Container that holds the newly visible component:

  private void makeVisibleBtnActionPerformed(java.awt.event.ActionEvent evt) {
    testTextField.setVisible(true);
    ((JPanel)getContentPane()).revalidate();
    getContentPane().repaint();
  }