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   *   Licensed to the Apache Software Foundation (ASF) under one
   *  or more contributor license agreements.  See the NOTICE file
   *  distributed with this work for additional information
   *  regarding copyright ownership.  The ASF licenses this file
   *  to you under the Apache License, Version 2.0 (the
   *  "License"); you may not use this file except in compliance
   *  with the License.  You may obtain a copy of the License at
   *
   *    https://www.apache.org/licenses/LICENSE-2.0
   *
   *  Unless required by applicable law or agreed to in writing,
   *  software distributed under the License is distributed on an
   *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   *  KIND, either express or implied.  See the License for the
   *  specific language governing permissions and limitations
   *  under the License.
   ****************************************************************/
  package org.apache.cayenne.swing;
  
  import java.awt.Color;
  import java.awt.Component;
  import java.awt.event.ActionEvent;
  import java.awt.event.ActionListener;
  
  import javax.swing.InputVerifier;
  import javax.swing.JComponent;
  import javax.swing.JTextArea;
  import javax.swing.JTextField;
  import javax.swing.event.DocumentEvent;
  import javax.swing.event.DocumentListener;
  import javax.swing.text.JTextComponent;
  
  import org.apache.cayenne.modeler.dialog.validator.ValidatorDialog;
  import org.apache.cayenne.validation.ValidationException;
  
  /**
   * A generic text adapter that is bound to a bean property.
   * 
   */
  public class TextBinding extends BindingBase {
  
      protected JTextComponent textComponent;
  
      protected Color defaultBGColor;
      protected Color errorColor;
      protected String defaultToolTip;
  
      public TextBinding(JTextField textField, String expression) {
          super(expression);
          this.textComponent = textField;
          initComponentDefaults();
  
          textField.addActionListener(new ActionListener() {
  
              public void actionPerformed(ActionEvent e) {
                  if (!modelUpdateDisabled) {
                      updateModel();
                  }
              }
          });
  
          textComponent.setInputVerifier(new InputVerifier() {
  
              public boolean verify(JComponent c) {
                  updateModel();
                  // release focus after coloring the field...
                  return true;
              }
          });
  
      }
  
      public TextBinding(JTextArea textArea, String property) {
          super(property);
          this.textComponent = textArea;
          initComponentDefaults();
  
          textComponent.getDocument().addDocumentListener(new DocumentListener() {
  
              public void insertUpdate(DocumentEvent e) {
                  verifyTextChange(e);
              }
  
              public void changedUpdate(DocumentEvent e) {
                  verifyTextChange(e);
              }
  
              public void removeUpdate(DocumentEvent e) {
                  verifyTextChange(e);
              }
  
              void verifyTextChange(DocumentEvent e) {
                  if (!modelUpdateDisabled) {
                      updateModel();
                  }
              }
          });
      }
  
      protected void initComponentDefaults() {
          this.errorColor = ValidatorDialog.WARNING_COLOR;
          this.defaultBGColor = textComponent.getBackground();
          this.defaultToolTip = textComponent.getToolTipText();
      }
  
      public void updateView() {
          Object value = getValue();
          String text = (value != null) ? value.toString() : null;
  
          modelUpdateDisabled = true;
          try {
              clear();
              textComponent.setText(text);
          }
          finally {
              modelUpdateDisabled = false;
          }
      }
  
      /**
       * Returns internal text component.
       */
      public Component getView() {
          return textComponent;
      }
  
      protected void updateModel() {
          try {
              setValue(textComponent.getText());
              clear();
          }
          catch (ValidationException vex) {
              textComponent.setBackground(errorColor);
              textComponent.setToolTipText(vex.getUnlabeledMessage());
          }
      }
  
      protected void clear() {
          textComponent.setBackground(defaultBGColor);
          textComponent.setToolTipText(defaultToolTip);
      }
  }
  