/*
* $Id: OutlineTree.java 4113 2009-12-01 11:08:59Z blowagie $
*
* Copyright 2007 Bruno Lowagie.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.itextpdf.rups.view.itext;
import java.util.Observable;
import java.util.Observer;
import javax.swing.JTree;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.DefaultTreeModel;
import com.itextpdf.rups.controller.PdfReaderController;
import com.itextpdf.rups.model.ObjectLoader;
import com.itextpdf.rups.model.TreeNodeFactory;
import com.itextpdf.rups.view.icons.IconTreeCellRenderer;
import com.itextpdf.rups.view.itext.treenodes.OutlineTreeNode;
import com.itextpdf.rups.view.itext.treenodes.PdfObjectTreeNode;
import com.itextpdf.rups.view.itext.treenodes.PdfTrailerTreeNode;
import com.itextpdf.text.pdf.PdfName;
/**
* A JTree visualizing information about the outlines (aka bookmarks) of
* the PDF file (if any).
*/
public class OutlineTree extends JTree implements TreeSelectionListener, Observer {
/** Nodes in the FormTree correspond with nodes in the main PdfTree. */
protected PdfReaderController controller;
/** Creates a new outline tree. */
public OutlineTree(PdfReaderController controller) {
super();
this.controller = controller;
setCellRenderer(new IconTreeCellRenderer());
setModel(new DefaultTreeModel(new OutlineTreeNode()));
addTreeSelectionListener(this);
}
/**
* @see java.util.Observer#update(java.util.Observable, java.lang.Object)
*/
public void update(Observable observable, Object obj) {
if (obj == null) {
setModel(new DefaultTreeModel(new OutlineTreeNode()));
repaint();
return;
}
if (obj instanceof ObjectLoader) {
ObjectLoader loader = (ObjectLoader)obj;
TreeNodeFactory factory = loader.getNodes();
PdfTrailerTreeNode trailer = controller.getPdfTree().getRoot();
PdfObjectTreeNode catalog = factory.getChildNode(trailer, PdfName.ROOT);
PdfObjectTreeNode outline = factory.getChildNode(catalog, PdfName.OUTLINES);
if (outline == null) {
return;
}
OutlineTreeNode root = new OutlineTreeNode();
loadOutline(factory, root, factory.getChildNode(outline, PdfName.FIRST));
setModel(new DefaultTreeModel(root));
}
}
/**
* Method that can be used recursively to load the outline hierarchy into the tree.
*/
private void loadOutline(TreeNodeFactory factory, OutlineTreeNode parent, PdfObjectTreeNode child) {
OutlineTreeNode childnode = new OutlineTreeNode(child);
parent.add(childnode);
PdfObjectTreeNode first = factory.getChildNode(child, PdfName.FIRST);
if (first != null) {
loadOutline(factory, childnode, first);
}
PdfObjectTreeNode next = factory.getChildNode(child, PdfName.NEXT);
if (next != null) {
loadOutline(factory, parent, next);
}
}
/**
* @see javax.swing.event.TreeSelectionListener#valueChanged(javax.swing.event.TreeSelectionEvent)
*/
public void valueChanged(TreeSelectionEvent evt) {
if (controller == null)
return;
OutlineTreeNode selectednode = (OutlineTreeNode)this.getLastSelectedPathComponent();
PdfObjectTreeNode node = selectednode.getCorrespondingPdfObjectNode();
if (node != null)
controller.selectNode(node);
}
/** A serial version uid. */
private static final long serialVersionUID = 5646572654823301007L;
}