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Sourcecode: libjgoodies-binding-java version File versions

MasterDetailsDelayedReadExample.java

/*
 * Copyright (c) 2002-2007 JGoodies Karsten Lentzsch. 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 Karsten Lentzsch 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, 
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 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 */

package com.jgoodies.binding.tutorial.basics;

import java.util.List;

import javax.swing.*;
import javax.swing.text.JTextComponent;

import com.jgoodies.binding.PresentationModel;
import com.jgoodies.binding.adapter.BasicComponentFactory;
import com.jgoodies.binding.list.SelectionInList;
import com.jgoodies.binding.tutorial.Album;
import com.jgoodies.binding.tutorial.TutorialUtils;
import com.jgoodies.binding.value.ConverterFactory;
import com.jgoodies.binding.value.DelayedReadValueModel;
import com.jgoodies.forms.builder.PanelBuilder;
import com.jgoodies.forms.factories.ButtonBarFactory;
import com.jgoodies.forms.layout.CellConstraints;
import com.jgoodies.forms.layout.FormLayout;

/**
 * Demonstrates an elegant means how to defer updates of a details view
 * after selecting an element in a master list. This can be useful
 * if changing the details requires time consuming additional operations, 
 * for example a database lookup, a heavy computation, or a remote access.<p>
 * 
 * This class builds a JList of Albums with an attached details panel 
 * that presents the current Album selection. The details panel's components 
 * are bound to the domain using ValueModels returned by a PresentationModel.
 * The master JList is bound to a SelectionInList that holds the list of Albums
 * and the currently selected Album. The SelectionInList is used as bean channel 
 * for the details PresentationModel. And so, whenever the SelectionInList's 
 * selection changes, the details PresentationModel will automatically update 
 * the bean used to display the details.<p>
 * 
 * This example implements the deferred details update by using a delayed
 * version of the SelectionInList as the presentation model's bean channel.
 * Changes in the SelectionInList's selecion are held back for a specified delay
 * before the selection becomes the presentation model's new bean.
 * 
 * @author Karsten Lentzsch
 * @version $Revision: 1.7 $
 * 
 * @see #initComponents()
 * @see DelayedReadValueModel
 * @see com.jgoodies.binding.PresentationModel
 * @see com.jgoodies.binding.tutorial.basics.MasterDetailsSelectionInListExample
 */

00079 public final class MasterDetailsDelayedReadExample {
    
    /**
     * The default in milliseconds to wait before a selection change 
     * shall be forwarded to the delayed details presentation model.
     */
00085     private static final int DEFAULT_DELAY = 1000;
    
    /**
     * Holds the list of Albums plus a single selection.
     */
00090     private final SelectionInList albumSelection;

    /**
     * Holds the selected Album and vends ValueModels that adapt Album properties.
     */
00095     private final PresentationModel detailsModel;
    
    private JList          albumsList;
    private JTextComponent titleField;
    private JTextComponent artistField;
    private JTextComponent classicalField;
    private JTextComponent composerField;
    private JButton        closeButton;

 
    // Launching **************************************************************
    
    public static void main(String[] args) {
        try {
            UIManager.setLookAndFeel("com.jgoodies.looks.plastic.PlasticXPLookAndFeel");
        } catch (Exception e) {
            // Likely PlasticXP is not in the class path; ignore.
        }
        JFrame frame = new JFrame();
        frame.setTitle("Binding Tutorial :: Master/Details (Delayed)");
        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        JComponent panel = new MasterDetailsDelayedReadExample().buildPanel();
        frame.getContentPane().add(panel);
        frame.pack();
        TutorialUtils.locateOnOpticalScreenCenter(frame);
        frame.setVisible(true);
    }
    
    
    // Instance Creation ******************************************************
    
    /**
     * Constructs a delayed list editor using an example Album list 
     * and the default delay.
     */
00130     public MasterDetailsDelayedReadExample() {
        this(Album.ALBUMS);
    }
    
    /**
     * Constructs a delayed list editor for editing the given list of Albums
     * using the default delay.
     * 
     * @param albums   the list of Albums to edit
     */
00140     public MasterDetailsDelayedReadExample(List albums) {
        this(albums, DEFAULT_DELAY);
    }
    

    /**
     * Constructs a list editor for editing the given list of Albums
     * using the specified delay.
     * 
     * @param albums   the list of Albums to edit
     * @param delay    the milliseconds to wait before the album selection
     *     is forwarded to the SelectionInList
     */
00153     public MasterDetailsDelayedReadExample(List albums, int delay) {
        this.albumSelection = new SelectionInList(albums);
        
        // Uses the delayed SelectionInList as PresentationModel's bean channel.
        // The SelectionInList is wrapped so that selection updates will be
        // deferred for the specified delay. In other words, the list's 
        // selection becomes the Presentation Model's new bean - after a delay.
        detailsModel = new PresentationModel(
                new DelayedReadValueModel(
                        albumSelection.getSelectionHolder(), 
                        delay, true));
    }
    
    
    // Component Creation and Initialization **********************************

    /**
     * Creates and intializes the UI components. The JList used to present 
     * the Album list is bound directly to the SelectionInList which 
     * implements the required ListModel interface. Even the JList's
     * selection model is bound directly bound the the SelectionInList's
     * selection index holder. It's just that the presentation model's
     * bean channel is not the selection, but a delayed selection.<p>
     *  
     * If the user selects an element in the Album JList, the selection model
     * changes immediately. It's just that the bean of the detailsModel will
     * be set a bit later, which in turn holds back details change a bit.
     * See the constructor to study how the master SelectionInList is wrapped
     * by a DelayedReadValueModel to hold back selection changes for a limited
     * amount of time.
     */
00184     private void initComponents() {
        albumsList = BasicComponentFactory.createList(
                albumSelection,
                TutorialUtils.createAlbumListCellRenderer());
        
        titleField = BasicComponentFactory.createTextField(
                detailsModel.getModel(Album.PROPERTYNAME_TITLE));
        titleField.setEditable(false);
        artistField = BasicComponentFactory.createTextField(
                detailsModel.getModel(Album.PROPERTYNAME_ARTIST));
        artistField.setEditable(false);
        classicalField = BasicComponentFactory.createTextField(
                ConverterFactory.createBooleanToStringConverter(
                        detailsModel.getModel(Album.PROPERTYNAME_CLASSICAL), 
                        "Yes",
                        "No"));
        classicalField.setEditable(false);
        composerField = BasicComponentFactory.createTextField(
                detailsModel.getModel(Album.PROPERTYNAME_COMPOSER));
        composerField.setEditable(false);
        closeButton = new JButton(TutorialUtils.getCloseAction());
    }
    
    
    // Building ***************************************************************

    /**
     * Builds and returns a panel that consists of 
     * a master list and a details form.
     * 
     * @return the built panel
     */
00216     public JComponent buildPanel() {
        initComponents();

        FormLayout layout = new FormLayout(
                "right:pref, 3dlu, 150dlu:grow",
        "p, 1dlu, p, 9dlu, p, 1dlu, p, 3dlu, p, 3dlu, p, 3dlu, p, 9dlu, p");
                
        PanelBuilder builder = new PanelBuilder(layout);
        builder.setDefaultDialogBorder();
        CellConstraints cc = new CellConstraints();
        
        builder.addSeparator("Albums",  cc.xyw(1,  1, 3));
        builder.add(new JScrollPane(
                        albumsList),    cc.xy (3,  3));

        builder.addSeparator("Delayed Details", 
                                        cc.xyw(1,  5, 3));
        builder.addLabel("Artist",      cc.xy (1,  7));
        builder.add(artistField,        cc.xy (3,  7));
        builder.addLabel("Title",       cc.xy (1,  9));
        builder.add(titleField,         cc.xy (3,  9));
        builder.addLabel("Classical",   cc.xy (1, 11));
        builder.add(classicalField,     cc.xy (3, 11));
        builder.addLabel("Composer",    cc.xy (1, 13));
        builder.add(composerField,      cc.xy (3, 13));
        builder.add(buildButtonBar(),   cc.xyw(1, 15, 3));
        
        return builder.getPanel();
    }
    
    
    private JComponent buildButtonBar() {
        return ButtonBarFactory.buildRightAlignedBar(closeButton);
    }
    
    
}

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