Re: Layout Doesn't Work (was: jLabel setVisible(true) Doesn't Work)

From:
clusardi2k@aol.com
Newsgroups:
comp.lang.java.programmer
Date:
Wed, 8 Aug 2012 05:54:41 -0700 (PDT)
Message-ID:
<e26bb607-9645-4ae7-9a43-4603d4bfcfce@googlegroups.com>
Nice project thanks, but I have two questions:

(Q1) How can you either modify this code or create a different project to u=
se controls that were dragged to the JFrame from the swing Palette. The cod=
e is not to create the buttons, JFrame, JPanel, or JLabel.

I.E.:In Design View suppose you have a JFrame, jPanel1, jButton1, jButton2,=
 and jLabel1 already on the Frame. They were dragged to the form. Your curr=
ent project did not create them. The buttons and label are in the jPanel. H=
ow would you make jLabel1 become invisible and invisible using two buttons.

(Q2) I noticed that int the below project the buttons move when one of the =
buttons is pressed. How can you stop that from happening.

On Tuesday, August 7, 2012 10:27:46 PM UTC-4, Jeff Higgins wrote:
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

@SuppressWarnings("serial")
public class Scratch extends JPanel implements ActionListener {

   private JButton vButton, iButton;
   private JLabel label;

   public Scratch() {

     vButton = new JButton("Visible");
     vButton.setMnemonic(KeyEvent.VK_D);
     vButton.setToolTipText("Sets Label visible (true)");
     vButton.setActionCommand("visible");
     vButton.addActionListener(this);
     vButton.setEnabled(false);

     iButton = new JButton("Invisible");
     iButton.setMnemonic(KeyEvent.VK_E);
     iButton.setToolTipText("Sets Label visible (false)");
     iButton.setActionCommand("invisible");
     iButton.addActionListener(this);

     label = new JLabel("Scratch");

     add(vButton);
     add(label);
     add(iButton);
   }

   public void actionPerformed(ActionEvent e) {
     if ("invisible".equals(e.getActionCommand())) {
       label.setVisible(false);
       vButton.setEnabled(true);
       iButton.setEnabled(false);
     } else {
       label.setVisible(true);
       vButton.setEnabled(false);
       iButton.setEnabled(true);

     }
   }

   private static void createAndShowGUI() {

     JFrame frame = new JFrame("Scratch");
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

     Scratch scratch = new Scratch();
     frame.setContentPane(scratch);

     frame.pack();
     frame.setVisible(true);
   }

   public static void main(String[] args) {
     javax.swing.SwingUtilities.invokeLater(new Runnable() {
       public void run() {
         createAndShowGUI();
       }
     });
   }
}

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