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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 http://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  org.apache.cayenne.validation.ValidationException;

 
 public class ComboSelectionBinding extends BindingBase {
 
     protected JComboBox comboBox;
 
     protected Color defaultBGColor;
     protected Color errorColor;
     protected String defaultToolTip;
     protected String noSelectionValue;

    
Binds to update model for a combo box selection events. For editable combo boxes model is updated whenever a new value is entered.
 
     public ComboSelectionBinding(JComboBox comboBoxString expression,
             String noSelectionValue) {
         super(expression);
         this. = comboBox;
         this. = noSelectionValue;
 
         // insert no selection value as first item in the combobox if it is not there
         if (noSelectionValue != null
                 && (comboBox.getItemCount() == 0 || comboBox.getItemAt(0) != noSelectionValue)) {
 
             comboBox.insertItemAt(noSelectionValue, 0);
         }
 
         comboBox.addActionListener(new ActionListener() {
 
             public void actionPerformed(ActionEvent e) {
                 if (!) {
                     updateModel();
                 }
             }
         });
 
         // init error colors
         initComponentDefaults();
     }
 
     protected void initComponentDefaults() {
         this. = .;
 
         if (.getEditor() != null) {
 
             Component editor = .getEditor().getEditorComponent();
             if (editor instanceof JComponent) {
                 JComponent jEditor = (JComponenteditor;
                 this. = jEditor.getBackground();
                 this. = jEditor.getToolTipText();
             }
         }
     }
 
     public void updateView() {
         Object value = getValue();
          = true;
         try {
             clear();
             if (value != null) {
                 this..setSelectedItem(value.toString());
             }
             else if ( != null) {
                 this..setSelectedItem();
             }
             else {
                this..setSelectedIndex(-1);
            }
        }
        finally {
             = false;
        }
    }
    protected void updateModel() {
        try {
            Object value = .getSelectedItem();
            if ( != null && .equals(value)) {
                value = null;
            }
            setValue(value);
            clear();
        }
        catch (ValidationException vex) {
            initWarning(vex.getLocalizedMessage());
        }
    }
    public Component getView() {
        return ;
    }
    protected void clear() {
        if (.getEditor() != null) {
            Component editor = .getEditor().getEditorComponent();
            if (editor instanceof JComponent) {
                JComponent jEditor = (JComponenteditor;
                jEditor.setBackground();
                jEditor.setToolTipText();
            }
        }
    }
    protected void initWarning(String message) {
        if (.getEditor() != null) {
            Component editor = .getEditor().getEditorComponent();
            if (editor instanceof JComponent) {
                JComponent jEditor = (JComponenteditor;
                jEditor.setBackground();
                jEditor.setToolTipText(message);
            }
        }
    }
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