1 | /*
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2 | * SimpleGraphicalClient.java
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3 | * Copyright (C) 2001 New Zealand Digital Library Project
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4 | *
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5 | * This program is free software; you can redistribute it and/or modify
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6 | * it under the terms of the GNU General Public License as published by
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7 | * the Free Software Foundation; either version 2 of the License, or
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8 | * (at your option) any later version.
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9 | *
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10 | * This program is distributed in the hope that it will be useful,
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11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 | * GNU General Public License for more details.
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14 | *
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15 | * You should have received a copy of the GNU General Public License
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16 | * along with this program; if not, write to the Free Software
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17 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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18 | */
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19 | package org.nzdl.gsdl.SimpleGraphicalClient;
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20 |
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21 | import java.awt.*;
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22 | import java.awt.event.*;
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23 | import java.io.*;
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24 | import java.io.IOException;
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25 | import java.util.*;
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26 | import javax.swing.*;
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27 | import javax.swing.event.*;
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28 | import javax.swing.text.*;
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29 | import javax.swing.text.html.*;
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30 |
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31 |
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32 | // local libraries
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33 | import org.nzdl.gsdl.service.NzdlCollectionInfo;
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34 | import org.nzdl.gsdl.service.NzdlQuery;
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35 | import org.nzdl.gsdl.service.NzdlRequest;
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36 | import org.nzdl.gsdl.service.NzdlResponse;
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37 | import org.nzdl.gsdl.service.NzdlResultSet;
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38 | import org.nzdl.gsdl.service.NzdlService;
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39 | import org.nzdl.gsdl.service.NzdlServiceClient;
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40 | import org.nzdl.gsdl.util.NzdlPreferences;
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41 |
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42 |
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43 | /**
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44 | * A Class representing the Panel in which the Querying action happens.
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45 | *
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46 | * Does most of the actual `work' in the package.
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47 | *
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48 | * @author Dave Nichols ([email protected])
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49 | * @author stuart yeates ([email protected])
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50 | * @version $Revision: 2225 $
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51 | * @see org.nzdl.gsdl.service.SimpleGraphicalClient.SimpleGraphicalClient
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52 | * @see org.nzdl.gsdl.service.SimpleGraphicalClient.CSModel
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53 | * @see javax.swing.JPanel
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54 | */
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55 |
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56 | public class SearchPanel extends JPanel implements ActionListener, Constants
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57 | {
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58 |
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59 | CSModel csModel;
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60 | NzdlService nzdl;
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61 |
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62 | JLabel collectionLabel;
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63 | JButton collectionInfoButton;
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64 | JTextField searchTextField;
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65 | JButton searchButton;
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66 | JComboBox collectionList;
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67 | JPanel queryFormulationPanel, resultsPanel, dataPanel;
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68 | JPanel collectionListPanel, searchTextFieldPanel, searchButtonPanel;
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69 | JList resultsList;
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70 | JScrollPane scrollResultsPane;
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71 | JScrollPane scrollDataPane;
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72 | JFrame windowParent;
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73 | //JEditorPane documentPane;
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74 | JTextPane documentPane; // make this a JTextComponent ??
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75 | JTextArea documentArea;
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76 | JTextComponent documentComponent;
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77 | HTMLEditorKit htmlEditorKit = new HTMLEditorKit();
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78 | StyledEditorKit styledEditorKit = new StyledEditorKit();
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79 | GMLDocument htmlDoc = new GMLDocument();
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80 | DefaultStyledDocument defaultStyledDoc = new DefaultStyledDocument();
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81 | final static GMLDocument blankDoc = new GMLDocument();
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82 |
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83 | /**
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84 | * Construct and initialise a new SearchPanel
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85 | */
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86 |
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87 | public SearchPanel( CSModel newCsModel, JFrame parent)
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88 | {
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89 | super();
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90 | windowParent = parent;
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91 | csModel = newCsModel;
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92 | nzdl = csModel.getNzdlService();
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93 | setLayout( new BoxLayout(this, BoxLayout.Y_AXIS));
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94 | setBorder(BorderFactory.createTitledBorder("Search"));
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95 |
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96 |
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97 | searchTextField = new JTextField("Enter search terms here", 35) {
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98 | public boolean isRequestFocusEnabled(){
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99 | return true;
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100 | }
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101 | };
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102 | searchTextField.setText("Enter search terms here");
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103 | searchTextField.setFont(searchTextFieldFont);
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104 | searchTextField.setColumns(35);
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105 | searchTextField.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));
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106 | searchButton = new JButton("Search");
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107 |
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108 | searchButton.addActionListener(this);
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109 | //searchButton.setBorder(BorderFactory.createEmptyBorder(2,2,2,2));
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110 | searchButton.setPreferredSize(new Dimension(80, 20));
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111 |
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112 | collectionListPanel = new JPanel();
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113 | collectionListPanel.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));
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114 | collectionListPanel.setLayout(new FlowLayout(FlowLayout.LEFT));
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115 | collectionLabel = new JLabel("Collection: ");
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116 |
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117 | collectionList = new JComboBox(csModel.getCollectionList()){
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118 | public boolean isFocusTraversable() {
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119 | return false;
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120 | }
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121 | };
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122 | collectionList.setEditable(false);
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123 |
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124 | collectionInfoButton = new JButton("Info...") {
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125 | public String getToolTipText(MouseEvent e) {
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126 | //return "more information on " + collectionList.getSelectedItem();
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127 | return "More information on " + csModel.getLongCollectionName((String)collectionList.getSelectedItem());
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128 | }
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129 | };
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130 | ToolTipManager.sharedInstance().registerComponent(collectionInfoButton);
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131 | collectionInfoButton.addActionListener(this);
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132 |
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133 | collectionListPanel.add(collectionLabel);
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134 | collectionListPanel.add(collectionList);
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135 | collectionListPanel.add(collectionInfoButton);
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136 |
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137 | searchTextFieldPanel = new JPanel();
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138 | searchTextFieldPanel.setLayout(new FlowLayout(FlowLayout.LEFT));
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139 | searchTextFieldPanel.add(searchTextField);
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140 |
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141 | searchButtonPanel = new JPanel();
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142 | searchButtonPanel.setLayout(new FlowLayout(FlowLayout.RIGHT));
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143 | searchButtonPanel.add(searchButton);
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144 |
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145 | queryFormulationPanel = new JPanel();
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146 | queryFormulationPanel.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));
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147 | queryFormulationPanel.setLayout(new BoxLayout(queryFormulationPanel, BoxLayout.Y_AXIS));
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148 | queryFormulationPanel.add(Box.createHorizontalStrut(100));
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149 | queryFormulationPanel.add(collectionListPanel);
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150 | queryFormulationPanel.add(searchTextFieldPanel);
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151 | queryFormulationPanel.add(searchButtonPanel);
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152 |
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153 | resultsPanel = new JPanel();
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154 | resultsPanel.setLayout(new BorderLayout());
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155 | resultsPanel.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));
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156 | ResultModel resultListModel = csModel.getResultsModel();
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157 | resultsList = new JList(resultListModel);
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158 | resultsList.setFont(resultsFont);
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159 | resultsList.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));
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160 | resultsList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
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161 | scrollResultsPane = new JScrollPane(resultsList);
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162 | resultsPanel.add(scrollResultsPane, BorderLayout.CENTER);
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163 | csModel.addResult(Result.INITIAL_FAKE_RESULT);
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164 |
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165 | dataPanel = new JPanel();
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166 | dataPanel.setLayout(new BorderLayout());
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167 | dataPanel.setBorder(BorderFactory.createEmptyBorder(3,3,3,3));
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168 | documentPane = new JTextPane() { // to control scrolling for raw text docs
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169 | public boolean getScrollableTracksViewportWidth() {
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170 | if (getSize().width < getParent().getSize().width)
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171 | return true;
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172 | else return false;
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173 | }
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174 | public void setSize(Dimension d) {
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175 | if (d.width < getParent().getSize().width)
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176 | d.width = getParent().getSize().width;
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177 | super.setSize(d);
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178 | }
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179 | }; // end custom JTextPane
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180 |
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181 | documentPane.setEditable(false);
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182 | documentPane.setFont(docFont);
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183 | documentPane.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));
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184 | //documentPane.setPreferredSize(new Dimension(100, 100));
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185 |
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186 | scrollDataPane = new JScrollPane(documentPane);
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187 | scrollDataPane.setPreferredSize(new Dimension(300, 300));
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188 | dataPanel.add(scrollDataPane, BorderLayout.CENTER);
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189 |
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190 | parent.getRootPane().setDefaultButton(searchButton);
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191 |
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192 | resultsList.addListSelectionListener(new ResultListSelectionHandler() );
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193 |
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194 | add(Box.createHorizontalStrut(400));
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195 | add(queryFormulationPanel);
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196 | add(resultsPanel);
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197 | add(dataPanel);
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198 | searchTextField.requestFocus();
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199 | }
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200 |
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201 | /** respond to the user pressing the Search button */
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202 |
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203 | public void actionPerformed(ActionEvent e) {
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204 | String collectionName = collectionList.getSelectedItem().toString();
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205 | if (e.getSource() == searchButton ) {
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206 | // cursor not set when RETURN pressed, only when button clicked ?
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207 | windowParent.setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
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208 | String queryString = searchTextField.getText();
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209 | System.err.println("Search started (" + collectionName + "): \"" + queryString + "\" ..." );
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210 | //send query to collection
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211 | NzdlQuery nzdlQuery = new NzdlQuery(queryString);
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212 | // return the first numResults that match
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213 | //query.setEndResults( 15 );
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214 | // "-1" means consider all the documents that match
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215 | nzdlQuery.setMaxDocs( -1 );
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216 | NzdlRequest request = new NzdlRequest( nzdlQuery );
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217 | NzdlResponse response = new NzdlResponse();
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218 |
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219 | nzdl.service( collectionName, request, response );
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220 | NzdlResultSet results = response.getResultSet();
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221 | ArrayList docIDs = new ArrayList(results.getDocumentIDs());
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222 | // System.err.println("Size of docIDs = " + docIDs.size());
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223 | // paired collection of docIDs and Titles - but as Sets!
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224 | Map titleMetaData = nzdl.getMetaData( collectionName, docIDs, "Title" );
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225 | // created a paired collection of docIDs and Titles - as simple Strings!
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226 | HashMap titleMap = new HashMap();
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227 | for (ListIterator i = docIDs.listIterator(); i.hasNext(); ) {
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228 | String docID = (String) i.next();
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229 | //Set titleSet = (Set) titleMetaData.get( docID );
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230 | ArrayList titleList = new ArrayList((Set)titleMetaData.get(docID));
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231 | // use the first title as *the* title
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232 | titleMap.put(docID, titleList.get(0));
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233 | } // end for
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234 | // update the results list
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235 | csModel.clearResults();
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236 |
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237 | if (docIDs.size() == 0 ) { // give some feedback for 0 results
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238 | csModel.addResult(Result.FAKE_RESULT);
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239 | documentPane.setStyledDocument(blankDoc);
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240 | }
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241 | else { // there are some results
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242 | Iterator docIDsIterator = docIDs.iterator();
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243 | while (docIDsIterator.hasNext()) {
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244 | String resultDocID = (String) docIDsIterator.next();
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245 | csModel.addResult(new Result((String)titleMap.get(resultDocID), resultDocID, collectionName ));
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246 | } //end while
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247 | if (NzdlPreferences.getInstance().getBoolean(Constants.DISPLAY_FIRST_DOC))
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248 | resultsList.setSelectedIndex(0); // should be under Preference control!
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249 | } // end else
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250 |
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251 |
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252 | csModel.getQueryHistoryModel().add( new QueryHistoryItem(new Query(queryString), new Date(), collectionName, "user"));
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253 |
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254 | titleMap.clear();
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255 | titleMetaData.clear();
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256 | docIDs.clear();
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257 | windowParent.setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
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258 | } // end if
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259 | else {
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260 | if (e.getSource() == collectionInfoButton) {
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261 | CollectionInfoDialog cid = new CollectionInfoDialog(windowParent, collectionName, csModel);
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262 | }
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263 | else {
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264 | System.err.println("unknown Action event in SearchPanel");
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265 | }
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266 | }
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267 | } //end actionPerformed
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268 |
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269 | /** handles selection events in the results list so that when the
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270 | user selects a new title (say) the document contents is
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271 | automatically displayed in the main panel */
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272 |
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273 | class ResultListSelectionHandler implements ListSelectionListener {
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274 |
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275 | // private Result previousSelection = null;
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276 |
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277 | public void valueChanged(ListSelectionEvent e) {
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278 | // get the result object from the SelectedIndex
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279 | // assume we only get here with events from resultsList
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280 | int docLength = 0;
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281 | if (e.getValueIsAdjusting()) { return; }
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282 | Result result = (Result) resultsList.getSelectedValue();
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283 | if ((result == Result.FAKE_RESULT) || (result == Result.INITIAL_FAKE_RESULT)) {
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284 | documentPane.setStyledDocument( blankDoc );
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285 | System.err.println("clicked on fake result");
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286 | }
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287 | else { // a real result representing a real document to deal with
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288 |
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289 | windowParent.setCursor(WAIT_CURSOR);
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290 |
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291 | deleteDocContents(); // for memory/garbage collection
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292 |
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293 | StringReader sr = new StringReader(nzdl.getDocument(result.getCollectionName(), result.getDocID()));
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294 |
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295 | if (NzdlPreferences.getInstance().getBoolean(Constants.RAW_TEXT))
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296 | // display the document as raw text
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297 | displayAsRawText(sr);
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298 | else {
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299 | // treat as HTML
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300 | displayAsHTML(sr);
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301 | //htmlDoc.getImageData(nzdl, result.getCollectionName());
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302 | }
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303 |
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304 | windowParent.setCursor(NORMAL_CURSOR);
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305 | }
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306 | } //end valueChanged
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307 | }//end ResultListSelectionHandler
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308 |
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309 |
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310 |
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311 | private void deleteDocContents() {
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312 | //trash the old htmlDoc for memory/garbage collection
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313 | try {
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314 | if (htmlDoc != null)
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315 | htmlDoc.remove(0, htmlDoc.getLength());
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316 | if (defaultStyledDoc != null)
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317 | defaultStyledDoc.remove(0, defaultStyledDoc.getLength());
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318 | }
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319 | catch (Exception exception) {
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320 | throw new Error (exception.toString());
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321 | }
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322 | } // end deleteDocContents
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323 |
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324 |
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325 | public void switchToRawText() {
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326 | windowParent.setCursor(WAIT_CURSOR);
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327 | System.err.println("switching to raw text");
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328 | displayAsRawText(new StringReader(documentPane.getText()));
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329 | windowParent.setCursor(NORMAL_CURSOR);
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330 | }
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331 |
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332 | public void displayAsRawText(StringReader sr) {
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333 | defaultStyledDoc = new DefaultStyledDocument();
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334 | documentPane.setEditorKit(styledEditorKit);
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335 | try {
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336 | styledEditorKit.read( sr, defaultStyledDoc, 0);
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337 | }
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338 | catch (Exception e) {
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339 | System.err.println(e);
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340 | }
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341 | documentPane.setDocument(defaultStyledDoc);
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342 | setCaretToStart(defaultStyledDoc.getLength());
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343 | } // end displayAsRawText
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344 |
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345 |
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346 | public void switchToHTML() {
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347 | windowParent.setCursor(WAIT_CURSOR);
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348 | System.err.println("switching to HTML");
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349 | displayAsHTML(new StringReader(documentPane.getText()));
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350 | windowParent.setCursor(NORMAL_CURSOR);
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351 | }
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352 |
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353 | public void displayAsHTML(StringReader sr) {
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354 | htmlDoc = new GMLDocument();
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355 | documentPane.setEditorKit(htmlEditorKit);
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356 | try {
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357 | htmlEditorKit.read( sr, htmlDoc, 0);
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358 | }
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359 | catch (Exception e) {
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360 | System.err.println(e);
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361 | }
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362 | documentPane.setStyledDocument( htmlDoc );
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363 | setCaretToStart(htmlDoc.getLength());
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364 | } // end displayAsHTML
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365 |
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366 |
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367 | private void setCaretToStart(int docLength) {
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368 | // it seems as if they haven't considered
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369 | // documents with > MAX_INT num of chars ...
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370 | if (docLength > 0)
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371 | documentPane.setCaretPosition(1);
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372 | }
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373 |
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374 |
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375 | } //end SearchPanel
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