Java/Swing Components/LayeredPane

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LayeredPane With Warning

   <source lang="java">

/*

* Copyright (c) 2007, Romain Guy
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
*   * Redistributions of source code must retain the above copyright
*     notice, this list of conditions and the following disclaimer.
*   * Redistributions in binary form must reproduce the above
*     copyright notice, this list of conditions and the following
*     disclaimer in the documentation and/or other materials provided
*     with the distribution.
*   * Neither the name of the TimingFramework project nor the names of its
*     contributors may be used to endorse or promote products derived
*     from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

import java.awt.Graphics; import java.awt.Point; import java.awt.image.BufferedImage; import java.io.IOException; import java.util.HashSet; import java.util.Set; import javax.imageio.ImageIO; import javax.swing.JComponent; import javax.swing.JViewport; import javax.swing.SwingUtilities; import java.awt.event.FocusEvent; import java.awt.event.FocusListener; import javax.swing.JLayeredPane; import javax.swing.JTextField; import javax.swing.OverlayLayout; import javax.swing.text.JTextComponent; /**

*
* @author Romain Guy
*/

public class Layers extends javax.swing.JFrame {

   /** Creates new form Layers */
   public Layers() {
       initComponents();
       
       addLayeredValidator();
       addValidations();
   }
   
   /** 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.
    */
   // <editor-fold defaultstate="collapsed" desc=" Generated Code ">//GEN-BEGIN:initComponents
   private void initComponents() {
       javax.swing.JLabel jLabel1;
       javax.swing.JLabel jLabel2;
       javax.swing.JLabel jLabel3;
       javax.swing.JLabel jLabel4;
       javax.swing.JLabel jLabel5;
       javax.swing.JList jList1;
       javax.swing.JScrollPane jScrollPane1;
       javax.swing.JScrollPane jScrollPane2;
       jScrollPane1 = new javax.swing.JScrollPane();
       jList1 = new javax.swing.JList();
       jLabel1 = new javax.swing.JLabel();
       jLabel2 = new javax.swing.JLabel();
       jLabel3 = new javax.swing.JLabel();
       jLabel4 = new javax.swing.JLabel();
       jLabel5 = new javax.swing.JLabel();
       firstName = new javax.swing.JTextField();
       lastName = new javax.swing.JTextField();
       phoneNumber = new javax.swing.JTextField();
       email = new javax.swing.JTextField();
       jScrollPane2 = new javax.swing.JScrollPane();
       address = new javax.swing.JTextArea();
       setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
       setTitle("Layered Panes");
       jList1.setModel(new javax.swing.AbstractListModel() {
           String[] strings = { "Jeff Dinkins", "Richard Bair", "Amy Fowler", "Scott Violet", "Hans Muller", "Chris Campbell", "Chet Haase" };
           public int getSize() { return strings.length; }
           public Object getElementAt(int i) { return strings[i]; }
       });
       jScrollPane1.setViewportView(jList1);
       jLabel1.setText("First Name");
       jLabel2.setText("Last Name");
       jLabel3.setText("Phone");
       jLabel4.setText("Email");
       jLabel5.setText("Address");
       address.setColumns(15);
       address.setRows(5);
       jScrollPane2.setViewportView(address);
       org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(getContentPane());
       getContentPane().setLayout(layout);
       layout.setHorizontalGroup(
           layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
           .add(layout.createSequentialGroup()
               .addContainerGap()
               .add(jScrollPane1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 152, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
               .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
               .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                   .add(org.jdesktop.layout.GroupLayout.TRAILING, jLabel5)
                   .add(org.jdesktop.layout.GroupLayout.TRAILING, jLabel4)
                   .add(org.jdesktop.layout.GroupLayout.TRAILING, jLabel3)
                   .add(org.jdesktop.layout.GroupLayout.TRAILING, jLabel2)
                   .add(org.jdesktop.layout.GroupLayout.TRAILING, jLabel1))
               .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
               .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                   .add(firstName, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 209, Short.MAX_VALUE)
                   .add(lastName, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 209, Short.MAX_VALUE)
                   .add(phoneNumber, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 209, Short.MAX_VALUE)
                   .add(email, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 209, Short.MAX_VALUE)
                   .add(jScrollPane2, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 209, Short.MAX_VALUE))
               .addContainerGap())
       );
       layout.setVerticalGroup(
           layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
           .add(layout.createSequentialGroup()
               .addContainerGap()
               .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                   .add(layout.createSequentialGroup()
                       .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
                           .add(jLabel1)
                           .add(firstName, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
                       .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
                       .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
                           .add(jLabel2)
                           .add(lastName, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
                       .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
                       .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
                           .add(jLabel3)
                           .add(phoneNumber, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
                       .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
                       .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
                           .add(jLabel4)
                           .add(email, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
                       .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
                       .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                           .add(jLabel5)
                           .add(jScrollPane2))
                       .add(6, 6, 6))
                   .add(jScrollPane1, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 210, Short.MAX_VALUE))
               .addContainerGap())
       );
       java.awt.Dimension screenSize = java.awt.Toolkit.getDefaultToolkit().getScreenSize();
       setBounds((screenSize.width-489)/2, (screenSize.height-266)/2, 489, 266);
   }// </editor-fold>//GEN-END:initComponents
   
   /**
    * @param args the command line arguments
    */
   public static void main(String args[]) {
       java.awt.EventQueue.invokeLater(new Runnable() {
           public void run() {
               new Layers().setVisible(true);
           }
       });
   }
   private void addLayeredValidator() {
       validator = new Validator();
       
       JLayeredPane layeredPane = getRootPane().getLayeredPane();
       layeredPane.setLayout(new OverlayLayout(layeredPane));
       layeredPane.add(validator, (Integer) (JLayeredPane.DEFAULT_LAYER + 50));
       //validator.setBounds(0, 0, getWidth(), getHeight());
   }
   private void addValidations() {
       addValidationForText(address);
       addValidationForText(firstName);
       addValidationForText(lastName);
       addValidationForNumber(phoneNumber);
       addValidationForEmail(email);
   }
   private void addValidationForText(JTextComponent field) {
       field.addFocusListener(new FocusListener() {
           public void focusGained(FocusEvent focusEvent) {
           }
           
           public void focusLost(FocusEvent focusEvent) {
               JTextComponent field = (JTextComponent) focusEvent.getComponent();
               String text = field.getText();
               
               if (text.matches("[-A-Za-z ]*")) {
                   validator.addWarning(field);
               } else {
                   validator.removeWarning(field);
               }
           }
       });
   }
   private void addValidationForNumber(JTextComponent field) {
       field.addFocusListener(new FocusListener() {
           public void focusGained(FocusEvent focusEvent) {
           }
           
           public void focusLost(FocusEvent focusEvent) {
               JTextField field = (JTextField) focusEvent.getComponent();
               String text = field.getText();
               
               if (text.matches("[-()0-9 ]*")) {
                   validator.addWarning(field);
               } else {
                   validator.removeWarning(field);
               }
           }
       });
   }
   private void addValidationForEmail(JTextComponent field) {
       field.addFocusListener(new FocusListener() {
           public void focusGained(FocusEvent focusEvent) {
           }
           
           public void focusLost(FocusEvent focusEvent) {
               JTextComponent field = (JTextComponent) focusEvent.getComponent();
               String text = field.getText();
               
               if (text.matches("[^@]+@([^.]+\\.)+[^.]+")) {
                   validator.addWarning(field);
               } else {
                   validator.removeWarning(field);
               }
           }
       });
   }
   
   // Variables declaration - do not modify//GEN-BEGIN:variables
   private javax.swing.JTextArea address;
   private javax.swing.JTextField email;
   private javax.swing.JTextField firstName;
   private javax.swing.JTextField lastName;
   private javax.swing.JTextField phoneNumber;
   // End of variables declaration//GEN-END:variables
   private Validator validator;
   

} /*

* Copyright (c) 2007, Romain Guy
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
*   * Redistributions of source code must retain the above copyright
*     notice, this list of conditions and the following disclaimer.
*   * Redistributions in binary form must reproduce the above
*     copyright notice, this list of conditions and the following
*     disclaimer in the documentation and/or other materials provided
*     with the distribution.
*   * Neither the name of the TimingFramework project nor the names of its
*     contributors may be used to endorse or promote products derived
*     from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

/**

*
* @author Romain Guy <romain.guy@mac.ru>
*/

class Validator extends JComponent {

   private Set<JComponent> invalidFields = new HashSet<JComponent>();
   private BufferedImage warningIcon;
   
   /** Creates a new instance of Validator */
   public Validator() {
       loadImages();
   }
   public void addWarning(JComponent field) {
       if (invalidFields.contains(field)) {
           invalidFields.remove(field);
           repaintBadge(field);
       }
   }
   public void removeWarning(JComponent field) {
       invalidFields.add(field);
       repaintBadge(field);
   }
   private void repaintBadge(JComponent field) {
       Point p = field.getLocationOnScreen();
       SwingUtilities.convertPointFromScreen(p, this);
       
       int x = p.x - warningIcon.getWidth() / 2;
       int y = (int) (p.y + field.getHeight() - warningIcon.getHeight() / 1.5);
       
       repaint(x, y, warningIcon.getWidth(), warningIcon.getHeight());
   }
   
   private void loadImages() {
       try {
           warningIcon = ImageIO.read(getClass().getResource("dialog-warning.png"));
       } catch (IOException ex) {
           ex.printStackTrace();
       }
   }
   
   @Override
   protected void paintComponent(Graphics g) {
       for (JComponent invalid : invalidFields) {
           if (invalid.getParent() instanceof JViewport) {
               JViewport viewport = (JViewport) invalid.getParent();
               // the parent of the viewport is a JScrollPane
               invalid = (JComponent) viewport.getParent();
           }
           
           Point p = invalid.getLocationOnScreen();
           SwingUtilities.convertPointFromScreen(p, this);
           
           int x = p.x - warningIcon.getWidth() / 2;
           int y = (int) (p.y + invalid.getHeight() - warningIcon.getHeight() / 1.5);
           
           if (g.getClipBounds().intersects(x, y,
                   warningIcon.getWidth(), warningIcon.getHeight())) {
               g.drawImage(warningIcon, x, y, null);
           }
       }
   }

}


      </source>