/*
* $Id: XRefTable.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.JTable;
import javax.swing.event.ListSelectionEvent;
import javax.swing.table.TableColumn;
import com.itextpdf.rups.controller.PdfReaderController;
import com.itextpdf.rups.model.IndirectObjectFactory;
import com.itextpdf.rups.model.ObjectLoader;
import com.itextpdf.rups.view.models.JTableAutoModel;
import com.itextpdf.rups.view.models.JTableAutoModelInterface;
import com.itextpdf.text.pdf.PdfNull;
import com.itextpdf.text.pdf.PdfObject;
/**
* A JTable that shows the indirect objects of a PDF xref table.
*/
public class XRefTable extends JTable implements JTableAutoModelInterface, Observer {
/** The factory that can produce all the indirect objects. */
protected IndirectObjectFactory objects;
/** The renderer that will render an object when selected in the table. */
protected PdfReaderController controller;
/** Creates a JTable visualizing xref table. */
public XRefTable(PdfReaderController controller) {
super();
this.controller = controller;
}
/**
* @see java.util.Observer#update(java.util.Observable, java.lang.Object)
*/
public void update(Observable observable, Object obj) {
if (obj == null) {
objects = null;
repaint();
return;
}
if (observable instanceof PdfReaderController
&& obj instanceof ObjectLoader) {
ObjectLoader loader = (ObjectLoader)obj;
objects = loader.getObjects();
setModel(new JTableAutoModel(this));
TableColumn col= getColumnModel().getColumn(0);
col.setPreferredWidth(5);
}
}
/**
* @see javax.swing.JTable#getColumnCount()
*/
public int getColumnCount() {
return 2;
}
/**
* @see javax.swing.JTable#getRowCount()
*/
public int getRowCount() {
if (objects == null) return 0;
return objects.size();
}
/**
* @see javax.swing.JTable#getValueAt(int, int)
*/
public Object getValueAt(int rowIndex, int columnIndex) {
switch (columnIndex) {
case 0:
return getObjectReferenceByRow(rowIndex);
case 1:
return getObjectDescriptionByRow(rowIndex);
default:
return null;
}
}
/**
* Gets the reference number of an indirect object
* based on the row index.
* @param rowIndex a row number
* @return a reference number
*/
protected int getObjectReferenceByRow(int rowIndex) {
return objects.getRefByIndex(rowIndex);
}
/**
* Gets the object that is shown in a row.
* @param rowIndex the row number containing the object
* @return a PDF object
*/
protected String getObjectDescriptionByRow(int rowIndex) {
PdfObject object = objects.getObjectByIndex(rowIndex);
if (object instanceof PdfNull)
return "Indirect object";
return object.toString();
}
/**
* @see javax.swing.JTable#getColumnName(int)
*/
public String getColumnName(int columnIndex) {
switch (columnIndex) {
case 0:
return "Number";
case 1:
return "Object";
default:
return null;
}
}
/**
* Gets the object that is shown in a row.
* @param rowIndex the row number containing the object
* @return a PDF object
*/
protected PdfObject getObjectByRow(int rowIndex) {
return objects.loadObjectByReference(getObjectReferenceByRow(rowIndex));
}
/**
* Selects a row containing information about an indirect object.
* @param ref the reference number of the indirect object
*/
public void selectRowByReference(int ref) {
int row = objects.getIndexByRef(ref);
setRowSelectionInterval(row, row);
scrollRectToVisible(getCellRect(row, 1, true));
valueChanged(null);
}
/**
* @see javax.swing.JTable#valueChanged(javax.swing.event.ListSelectionEvent)
*/
@Override
public void valueChanged(ListSelectionEvent evt) {
if (evt != null)
super.valueChanged(evt);
if (controller != null && objects != null) {
controller.render(getObjectByRow(this.getSelectedRow()));
controller.selectNode(getObjectReferenceByRow(getSelectedRow()));
}
}
/** A serial version UID. */
private static final long serialVersionUID = -382184619041375537L;
}