[15222] | 1 | /**
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| 2 | *#########################################################################
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| 3 | * SearchResultsDisplay.java - part of the demo-client for Greenstone 3,
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| 4 | * of the Greenstone digital library suite from the New Zealand Digital
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| 5 | * Library Project at the * University of Waikato, New Zealand.
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| 6 | * <BR><BR>
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| 7 | * Copyright (C) 2008 New Zealand Digital Library Project
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| 8 | * <BR><BR>
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| 9 | * This program is free software; you can redistribute it and/or modify
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| 10 | * it under the terms of the GNU General Public License as published by
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| 11 | * the Free Software Foundation; either version 2 of the License, or
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| 12 | * (at your option) any later version.
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| 13 | * <BR><BR>
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| 14 | * This program is distributed in the hope that it will be useful,
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| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 17 | * GNU General Public License for more details.
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| 18 | *########################################################################
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| 19 | */
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| 20 |
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| 21 | package org.greenstone.gs3client;
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| 22 |
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| 23 | import java.awt.Component;
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| 24 | import java.awt.Container;
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| 25 | import java.awt.Cursor;
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| 26 | import java.awt.Dimension;
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| 27 | import java.awt.BorderLayout;
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| 28 | import java.awt.FlowLayout;
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| 29 |
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| 30 | import javax.swing.JPopupMenu;
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| 31 | import javax.swing.JPanel;
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| 32 | import javax.swing.JScrollPane;
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| 33 | import javax.swing.JSplitPane;
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| 34 | import javax.swing.JEditorPane;
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| 35 | import javax.swing.JList;
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| 36 | import javax.swing.JLabel;
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| 37 | import javax.swing.JTree;
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| 38 | import javax.swing.tree.DefaultMutableTreeNode;
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| 39 | import javax.swing.tree.DefaultTreeModel;
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| 40 | import javax.swing.tree.TreeSelectionModel;
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| 41 | import javax.swing.event.TreeSelectionEvent;
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| 42 | import javax.swing.event.TreeSelectionListener;
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| 43 |
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| 44 | import javax.swing.text.html.HTMLDocument;
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| 45 |
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| 46 | import org.apache.log4j.Logger;
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| 47 | import org.greenstone.gs3client.data.DocumentNodeData;
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| 48 |
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| 49 | import java.net.URL;
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| 50 | import java.net.MalformedURLException;
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| 51 |
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| 52 | /**
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| 53 | * The Search panel inside the Java-client's tab pane that's labelled
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| 54 | * "Search Results". This panel contains two tree views:
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| 55 | * - one for displaying the list of search results (top-level documents or document
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| 56 | * - one for displaying the structure of document nodes selected in the list of
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| 57 | * search results.
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| 58 | * This panel also contains an area where the selected documentNode's metadata is
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| 59 | * displayed, and a text area where the textual or image content of a selected
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| 60 | * documentNode is displayed.
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| 61 | * @author ak19
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| 62 | */
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| 63 | public class SearchResultsDisplay
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| 64 | extends JPanel implements TreeSelectionListener, ColourCombo.ColourChangeable
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| 65 | {
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| 66 | /** The Logger for this class */
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| 67 | static Logger LOG = Logger.getLogger(SearchResultsDisplay.class);
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| 68 |
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| 69 | /** Access to the running instance of GS3JavaClient */
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| 70 | protected GS3JavaClient client;
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| 71 |
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| 72 | /* GUI items of this SearchResults Panel */
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| 73 | protected JTree searchResultsTree, docStructureTree;
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| 74 | protected JSplitPane docInfoPane, docInfoWithContent, treeviewSplitPane;
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| 75 | protected JEditorPane docContentEditPane;
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| 76 | protected JList metanames, metavalues;
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| 77 | /** Context menu that pops up when users right click in the browse tree area */
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| 78 | protected JPopupMenu popup;
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| 79 |
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| 80 | /** Constructor that creates the Search Panel and its internal GUI items.
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| 81 | * @param client is the running instance of the client application through
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| 82 | * which its methods can be accessed. */
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| 83 | public SearchResultsDisplay(GS3JavaClient client)
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| 84 | {
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| 85 | super(new FlowLayout(FlowLayout.LEFT));
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| 86 | // so the contents of this panel are not centred
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| 87 | this.client = client;
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| 88 |
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| 89 | // The panels: searchresults (with a tree), docStructure (also
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| 90 | // contains a tree), metadataPanel (with 2 lists for metanames
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| 91 | // and metavalues and docContentEditor to show a selected html
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| 92 | // document's contents
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| 93 | JPanel searchResultsPanel, docStructurePanel, metadataPanel;
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| 94 |
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| 95 | this.docContentEditPane = new JEditorPane();
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| 96 | this.docContentEditPane.setEditable(false);
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| 97 | this.docContentEditPane.setContentType("text/html");
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| 98 | //"text/plain" to view the html markup
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| 99 |
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| 100 | searchResultsPanel = new JPanel(new BorderLayout());
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| 101 | docStructurePanel = new JPanel(new BorderLayout());
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| 102 | searchResultsPanel.add(
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| 103 | new JLabel("Documents returned"), BorderLayout.NORTH);
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| 104 | docStructurePanel.add(
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| 105 | new JLabel("Document structure"), BorderLayout.NORTH);
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| 106 |
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| 107 | metadataPanel = new JPanel(new BorderLayout());
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| 108 | this.metanames = new JList();
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| 109 | this.metavalues = new JList();
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| 110 | metadataPanel.add(metanames, BorderLayout.WEST);
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| 111 | metadataPanel.add(metavalues, BorderLayout.CENTER);
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| 112 |
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| 113 | JPanel metaSuperPanel = new JPanel(new BorderLayout());
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| 114 | metaSuperPanel.add(new JLabel("Metadata"), BorderLayout.NORTH);
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| 115 | metaSuperPanel.add(
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| 116 | new JScrollPane(metadataPanel), BorderLayout.CENTER);
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| 117 |
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| 118 | // Create the searchresults tree and the docStructure tree
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| 119 | // (neither of them initialised to any meaningful nodes at present).
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| 120 | // Both trees allow only one selection at a time.
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| 121 | // Add a listener to both for when their treenode selections change.
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| 122 | // Finally add them to their respective JPanels.
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| 123 | searchResultsTree = new JTree(new DefaultMutableTreeNode(null));
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| 124 | searchResultsTree.getSelectionModel().setSelectionMode(
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| 125 | TreeSelectionModel.SINGLE_TREE_SELECTION);
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| 126 | searchResultsTree.addTreeSelectionListener(this);
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| 127 | searchResultsPanel.add(new JScrollPane(searchResultsTree),
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| 128 | BorderLayout.CENTER);
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| 129 |
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| 130 | docStructureTree = new JTree(new DefaultMutableTreeNode(null));
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| 131 | docStructureTree.getSelectionModel().setSelectionMode(
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| 132 | TreeSelectionModel.SINGLE_TREE_SELECTION);
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| 133 | docStructureTree.addTreeSelectionListener(this);
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| 134 | docStructurePanel.add(new JScrollPane(docStructureTree),
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| 135 | BorderLayout.CENTER);
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| 136 | // add a (rightclick) popup menu to the document structure tree:
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| 137 | popup = new JPopupMenu();
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| 138 | docStructureTree.setComponentPopupMenu(popup);
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| 139 | docStructureTree.addMouseListener(new Displays.PopupListener(
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| 140 | popup, docStructureTree, client, this.docContentEditPane));
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| 141 |
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| 142 | // Add the docStructure and metadata panels next to each
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| 143 | // other within a split pane
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| 144 | docInfoPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT);
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| 145 | docInfoPane.setLeftComponent(docStructurePanel);
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| 146 | docInfoPane.setRightComponent(metaSuperPanel);
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| 147 | docInfoPane.setOneTouchExpandable(true);
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| 148 |
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| 149 | // Add that to the top of the editorpanel showing the contents of
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| 150 | // any selected document nodes
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| 151 | docInfoWithContent = new JSplitPane(JSplitPane.VERTICAL_SPLIT);
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| 152 | docInfoWithContent.setTopComponent(docInfoPane);
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| 153 | docInfoWithContent.setBottomComponent(
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| 154 | new JScrollPane(this.docContentEditPane));
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| 155 | docInfoWithContent.setOneTouchExpandable(true);
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| 156 |
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| 157 | // Add that splitpane to the right of the search results panel
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| 158 | // in a new splitpane (horizontal)
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| 159 | treeviewSplitPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT);
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| 160 | treeviewSplitPane.setLeftComponent(searchResultsPanel);
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| 161 | treeviewSplitPane.setRightComponent(this.docInfoWithContent);
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| 162 | treeviewSplitPane.setOneTouchExpandable(true);
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| 163 | this.add(treeviewSplitPane);
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| 164 |
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| 165 | // All the scrollviews and the splitpanes will be sized
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| 166 | // when getPreferredSize() is called on show()/setVisible()
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| 167 | }
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| 168 |
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| 169 | /** Overrode this method to resize the splitpanes within, upon resize.
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| 170 | * It calculates the size of this panel, as well as setting those of
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| 171 | * the splitpanes it contains based on the size of the parent container.
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| 172 | * @return the preferred dimensions of this JPanel. */
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| 173 | public Dimension getPreferredSize() {
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| 174 | Dimension size = this.getParent().getSize(); //900, 500
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| 175 | int x = (int)size.getWidth() / 3;
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| 176 | int y = (int)(size.getHeight() / 5 * 2);
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| 177 | docInfoPane.setDividerLocation(x);
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| 178 | docInfoWithContent.setDividerLocation(y);
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| 179 | treeviewSplitPane.setDividerLocation(x);
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| 180 | docInfoPane.setPreferredSize(size);
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| 181 | docInfoWithContent.setPreferredSize(size);
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| 182 | treeviewSplitPane.setPreferredSize(size);
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| 183 | return size;
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| 184 | }
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| 185 |
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| 186 | /** Changes the colour of the query form and its controls to the
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| 187 | * current colours set in class ColourCombo. Specified by
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| 188 | * the ColourCombo.ColourChangeable interface. */
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| 189 | public void changeUIColour() {
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| 190 | Component[] comps = { this, this.docStructureTree,
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| 191 | this.searchResultsTree, metanames, metavalues, popup };
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| 192 | ColourCombo.changeColor(comps);
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| 193 |
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| 194 | // ensures that the JLabel for "metadata" and the trees
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| 195 | // are coloured properly:
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| 196 | ColourCombo.changeAncestorColor(metanames);
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| 197 | ColourCombo.changeAncestorColor(this.docStructureTree);
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| 198 | ColourCombo.changeAncestorColor(this.searchResultsTree);
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| 199 | }
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| 200 |
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| 201 | /** Clears the service-specific buttons in the browseBar and the
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| 202 | * service-specific display-data. The rest of the GUI (split panes, panels)
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| 203 | * remain as they are. Resets the contents of the widgets in this panel. */
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| 204 | public void clear() {
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| 205 | //searchResultsTree.removeAll();
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| 206 | //docStructureTree.removeAll(); // doesn't seem to emtpy tree
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| 207 | //this.metanames.removeAll(); //doesn't seem to empty the list values
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| 208 | //this.metavalues.removeAll(); //doesn't seem to empty the list values
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| 209 |
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| 210 | // empty the docStructureTree's popup menu too
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| 211 | popup.removeAll();
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| 212 |
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| 213 | // empty the trees
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| 214 | ((DefaultTreeModel)searchResultsTree.getModel()).setRoot(null);
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| 215 | ((DefaultTreeModel)docStructureTree.getModel()).setRoot(null);
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| 216 | // empty the metadatalists
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| 217 | final String[] empty = {""};
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| 218 | this.metanames.setListData(empty);
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| 219 | this.metavalues.setListData(empty);
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| 220 | // empty the html view area
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| 221 | this.docContentEditPane.setText("");
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| 222 | }
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| 223 |
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| 224 | /** Restructures the searchResultsTree when another search has been made, so
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| 225 | * that the search results contain a new list of documentNodeData objects.
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| 226 | * @param resultDocs - the list of (new) DocumentNodeData objects that have
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| 227 | * been returned as the results of a query/search operation. */
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| 228 | public void setResults(DocumentNodeData[] resultDocs) {
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| 229 | // Empty out whatever was in our searchResultsTree and in the
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| 230 | // other displays
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| 231 | clear();
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| 232 |
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| 233 | // Populate the searchresults tree with each node being a document
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| 234 | // that represents a different search result
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| 235 | DefaultMutableTreeNode newRoot
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| 236 | = new DefaultMutableTreeNode();
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| 237 | for(int i = 0; i < resultDocs.length; i++)
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| 238 | newRoot.add(new DefaultMutableTreeNode(resultDocs[i]));
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| 239 |
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| 240 | DefaultTreeModel model
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| 241 | = (DefaultTreeModel)searchResultsTree.getModel();
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| 242 | model.setRoot(newRoot);
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| 243 | // We do not want a root, without a root it is perfect for linear
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| 244 | // display of search results (a.o.t. hierarchical display)
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| 245 | searchResultsTree.setRootVisible(false);
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| 246 | // hierarchical display of the first search result (if its root is set)
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| 247 | if(resultDocs.length > 0)
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| 248 | // array may be empty if there were no resultdocs
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| 249 | this.restructureWithNewRoot(resultDocs[0].getRoot());
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| 250 | }
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| 251 |
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| 252 | /** Restructures the docStructureTree with a new rootNode when a different
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| 253 | * search result has been clicked.
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| 254 | * @param rootDocNode - the new root DocumentNodeData whose structure is
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| 255 | * to be displayed in the docStructureTree. */
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| 256 | protected void restructureWithNewRoot(DocumentNodeData rootDocNode)
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| 257 | {
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| 258 | DefaultMutableTreeNode root = null;
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| 259 | if(rootDocNode != null) {
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| 260 | // Create the nodes.
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| 261 | root = new DefaultMutableTreeNode(rootDocNode);
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| 262 | Displays.createNodesForChildren(rootDocNode, root);
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| 263 | }
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| 264 | DefaultTreeModel model = (DefaultTreeModel)docStructureTree.getModel();
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| 265 |
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| 266 | docStructureTree.removeAll();
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| 267 | model.setRoot(root);
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| 268 |
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| 269 | // empty the contentpane
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| 270 | this.docContentEditPane.setText("");
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| 271 | }
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| 272 |
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| 273 | /** Part of the TreeSelectionListener interface. When this is called, an item
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| 274 | * has been clicked in either the searchResultsTree or the docStructureTree.
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| 275 | * This method displays the metadata and textual contents accordingly
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| 276 | * of the selected documentNodeData object. */
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| 277 | public void valueChanged(TreeSelectionEvent e) {
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| 278 | // remove any menuItems in the popup from the previously
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| 279 | // selected docNode
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| 280 | popup.removeAll();
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| 281 |
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| 282 | DefaultMutableTreeNode node = null;
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| 283 | if(e.getSource() == searchResultsTree)
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| 284 | node = (DefaultMutableTreeNode)
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| 285 | searchResultsTree.getLastSelectedPathComponent();
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| 286 | else if(e.getSource() == docStructureTree)
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| 287 | node = (DefaultMutableTreeNode)
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| 288 | docStructureTree.getLastSelectedPathComponent();
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| 289 |
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| 290 | if(node == null) return;
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| 291 | Object nodeInfo = node.getUserObject();
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| 292 | // after construction there's nothing in the trees, so check for that:
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| 293 | if(nodeInfo == null) return;
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| 294 |
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| 295 | // We need to change to a Wait cursor while we load the documentNode
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| 296 | Container c = client.getContentPane();
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| 297 | c.setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
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| 298 |
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| 299 | DocumentNodeData docNode = (DocumentNodeData)nodeInfo;
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| 300 |
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| 301 | // If user had clicked on a searchResult:
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| 302 | if(e.getSource() == this.searchResultsTree && node.isLeaf()) {
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| 303 | this.client.retrieveTitledStructureFor(docNode);
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| 304 | // Now it has set the root and descendents for the
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| 305 | // selected docNode
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| 306 | DocumentNodeData root = docNode.getRoot();
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| 307 | // get the nodestructuredisplay from the client
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| 308 | // nodestructure.restructureWithNewRoot(root, docNode);
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| 309 | this.restructureWithNewRoot(root);
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| 310 |
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| 311 | // First ensure the metadata for the docNode is set
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| 312 | client.retrieveAllMetadataFor(docNode);
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| 313 | // now metadata for the document is set
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| 314 | // Now, if metadata viewable, then display the metadata
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| 315 | // for the root document node:
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| 316 | Displays.showMeta(docNode, metanames, metavalues);
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| 317 |
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| 318 | // make the client retrieve the content for the docNode
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| 319 | // that's clicked on, and display it in the docContentEditPane
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| 320 | client.retrieveContentFor(docNode);
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| 321 | // JEditorPane can't handle Justify, it centers such paras
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| 322 | // Therefore, left align them instead.
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| 323 | String docContent = docNode.getContent();
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| 324 | if(docContent != null) {
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| 325 | docContent = docContent.replaceAll(
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| 326 | "ALIGN=\"JUSTIFY\"", "ALIGN=\"LEFT\"");
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| 327 | }
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| 328 | this.docContentEditPane.setText(docContent);
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| 329 | this.docContentEditPane.setCaretPosition(0); // set 'cursor' at top
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| 330 | }
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| 331 |
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| 332 | // If the user had clicked on any docNode - leaf or otherwise
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| 333 | // - in the docStructureTree panel:
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| 334 | else if(e.getSource() == this.docStructureTree) {
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| 335 | // First ensure the metadata for the docNode is set
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| 336 | client.retrieveAllMetadataFor(docNode);
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| 337 | // now metadata for the document is set
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| 338 |
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| 339 | // Display the metadata for this document node:
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| 340 | Displays.showMeta(docNode, metanames, metavalues);
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| 341 |
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| 342 | // if the document has NoText set to 1 (doc has no text), then it
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| 343 | // has an image - display this by default
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| 344 | if(docNode.hasNoText() && node.isLeaf() /*&& docNode.canBeImage()*/) {
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| 345 | this.docContentEditPane.setText(
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| 346 | Displays.getImgUrlEnclosedInHtml(docNode.getImgURL()));
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| 347 | this.docContentEditPane.setCaretPosition(0);
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| 348 | }
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| 349 | else { // now we know that the document must have text:
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| 350 | // make the client retrieve the content for the docNode
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| 351 | // that's clicked on, and display it in the docContentEditPane
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| 352 | client.retrieveContentFor(docNode);
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| 353 | // Java's htmlpane does not recognise justified alignment.
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| 354 | // It displays them all centred. So replace all ALIGN="JUSTIFY"
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| 355 | // with ALIGN="LEFT" here. (Not in the DocumentNodeData class,
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| 356 | // because our nodeContent should not be transformed: it will
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| 357 | // display properly in browsers and other html displays).
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| 358 | String docContent = docNode.getContent();
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| 359 | if(docContent != null) {
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| 360 | docContent = docContent.replaceAll(
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| 361 | "ALIGN=\"JUSTIFY\"", "ALIGN=\"LEFT\"");
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| 362 | }
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| 363 |
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| 364 | // set the baseURL for digital libraries that use relative paths
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| 365 | // to images and don't take care of base paths themselves
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| 366 | // (GS3 uses the _httpdocimg_ macro to resolve relative urls)
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| 367 | String baseURL = client.getBaseURL();
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| 368 | // TODO: make the docNode itself workout its URL by passing
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| 369 | // baseURL to the docNode?
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| 370 | if(!baseURL.equals("") && docNode.getRoot() != null) {
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| 371 | // "" is the case where dlAPIA = gs3
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| 372 | // where the _httpdocimg_ macro will deal with
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| 373 | // resolving the relative urls into their full ones
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| 374 | // We don't want to set the base and meddle with macro
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| 375 | // for those cases.
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| 376 | // For Fedora's case:
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| 377 | HTMLDocument doc
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| 378 | = (HTMLDocument)this.docContentEditPane.getDocument();
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| 379 | try{
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| 380 | URL url = new URL(baseURL+docNode.getRoot().nodeID+"/");
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| 381 | //System.err.println("url: " + url.toString());
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| 382 | doc.setBase(url);
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| 383 | //docContent = docContent.replaceAll("_httpdocimg_/", "");
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| 384 | LOG.debug(docContent);
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| 385 | }catch(MalformedURLException mex) {
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| 386 | ; //nothing to be done, leave the base as it is
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| 387 | }
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| 388 | }
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| 389 | this.docContentEditPane.setText(docContent);
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| 390 | // make sure 'cursor' (actually caret) is at the top
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| 391 | // Don't want it to autoscroll to the bottom of the contentPane
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| 392 | this.docContentEditPane.setCaretPosition(0);
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| 393 | }
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| 394 | }
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| 395 | c.setCursor(Cursor.getDefaultCursor());
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| 396 | }
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| 397 | } |
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