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The JGoodies Binding library connects object properties to Swing user interface components. And it helps you represent the state and behavior of a presentation independently of the GUI components used in the interface.

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/*
 * Copyright (c) 2002-2013 JGoodies Software GmbH. All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  o Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *
 *  o 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.
 *
 *  o Neither the name of JGoodies Software GmbH 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;
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 */

package com.jgoodies.binding.value;

import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;

import com.jgoodies.binding.PresentationModel;
import com.jgoodies.binding.adapter.BasicComponentFactory;
import com.jgoodies.binding.adapter.Bindings;



/**
 * A ValueModel that provides relevant GUI state in presentation models.
 * It provides bound properties for the frequently used JComponent state
 * enabled,visible and JTextComponent state editable.
 * ComponentValueModels can be used to set these properties at the
 * presentation model layer; any ComponentValueModel property change
 * will be reflected by components bound to that ComponentValueModel.

* * The ComponentValueModel is similar to the Swing Action class. * If you disable an Action, all buttons and menu items bound to that Action * will be disabled. If you disable a ComponentValueModel, all components * bound to that ComponentValueModel will be disabled. If you set the * ComponentValueModel to invisible, the component bound to it will become * invisible. If you set a ComponentValueModel to non-editable, * the JTextComponents bound to it will become non-editable.

* * Since version 1.1, PresentationModels can vend ComponentValueModels * using {@code #getComponentModel(String)} and * {@code #getBufferedComponentModel(String)}. Multiple calls * to these factory methods return the same ComponentValueModel.

* * The BasicComponentFactory and the Bindings class check if the ValueModel * provided to create/bind a Swing component is a ComponentValueModel. * If so, the ComponentValueModel properties will be synchronized * with the associated Swing component properties.

* * It is recommended to use ComponentValueModels only for those models * that are bound to view components that require GUI state changes.

* * Example Code:

 * final class AlbumView {
 *
 *  ...
 *
 *     private void initComponents() {
 *         // No state modifications required for the name field.
 *         nameField = BasicComponentFactory.createTextField(
 *             presentationModel.getModel(Album.PROPERTY_NAME));
 *         ...
 *         // Enablement shall change for the composer field
 *         composerField = BasicComponentFactory.createTextField(
 *             presentationModel.getComponentModel(Album.PROPERTY_COMPOSER));
 *         ...
 *     }
 *
 *  ...
 *
 * }
 *
 *
 * public final class AlbumPresentationModel extends PresentationModel {
 *
 *  ...
 *
 *     private void updateComposerEnablement(boolean enabled) {
 *         getComponentModel(Album.PROPERTY_COMPOSER).setEnabled(enabled);
 *     }
 *
 *  ...
 *
 * }
 * 

* * As of the Binding version 2.0 the ComponentValueModel feature * is implemented for text components, radio buttons, check boxes, * combo boxes, and lists. JColorChoosers bound using the * Bindings class will ignore ComponentValueModel state. * * @author Karsten Lentzsch * @version $Revision: 1.15 $ * * @see PresentationModel#getComponentModel(String) * @see PresentationModel#getBufferedComponentModel(String) * @see BasicComponentFactory * @see Bindings * * @since 2.4 */ public final class DefaultComponentValueModel extends AbstractWrappedValueModel { // Instance Creation ****************************************************** /** * Constructs a DefaultComponentValueModel that wraps the given ValueModel * and adds {@link ComponentModel} Properties. * * @param wrappee the underlying or wrapped ValueModel */ public DefaultComponentValueModel(ValueModel wrappee) { super(wrappee); } // ValueModel Implementation ********************************************** /** * Returns this model's current subject value. * * @return this model's current subject value. */ @Override public Object getValue() { return getWrappee().getValue(); } /** * Sets the given value as new subject value. * * @param newValue the value to set */ @Override public void setValue(Object newValue) { getWrappee().setValue(newValue); } // AbstractWrappedValueModel Behavior ************************************* @Override protected PropertyChangeListener createValueChangeHandler() { return new ValueChangeHandler(); } // Event Handling ********************************************************* /** * Forwards value changes in the wrappee to listeners of this wrapper. */ private final class ValueChangeHandler implements PropertyChangeListener { @Override public void propertyChange(PropertyChangeEvent evt) { fireValueChange(evt.getOldValue(), evt.getNewValue(), true); } } }





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