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/*
 * $Id: PdfObjectPanel.java 3117 2008-01-31 05:53:22Z xlv $
 *
 * 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.lowagie.rups.view.itext;

import com.lowagie.rups.view.models.DictionaryTableModel;
import com.lowagie.rups.view.models.PdfArrayTableModel;
import com.lowagie.text.pdf.PdfArray;
import com.lowagie.text.pdf.PdfDictionary;
import com.lowagie.text.pdf.PdfObject;
import java.awt.CardLayout;
import java.util.Observable;
import java.util.Observer;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextArea;

public class PdfObjectPanel extends JPanel implements Observer {

    /**
     * Name of a panel in the CardLayout.
     */
    private static final String TEXT = "text";
    /**
     * Name of a panel in the CardLayout.
     */
    private static final String TABLE = "table";
    /**
     * a serial version id.
     */
    private static final long serialVersionUID = 1302283071087762494L;
    /**
     * The layout that will show the info about the PDF object that is being analyzed.
     */
    protected CardLayout layout = new CardLayout();
    /**
     * Table with dictionary entries.
     */
    JTable table = new JTable();
    /**
     * The text pane with the info about a PDF object in the bottom panel.
     */
    JTextArea text = new JTextArea();

    /**
     * Creates a PDF object panel.
     */
    public PdfObjectPanel() {
        // layout
        setLayout(layout);

        // dictionary / array / stream
        JScrollPane dict_scrollpane = new JScrollPane();
        dict_scrollpane.setViewportView(table);
        add(dict_scrollpane, TABLE);

        // number / string / ...
        JScrollPane text_scrollpane = new JScrollPane();
        text_scrollpane.setViewportView(text);
        add(text_scrollpane, TEXT);
    }

    /**
     * Clear the object panel.
     */
    public void clear() {
        text.setText(null);
        layout.show(this, TEXT);
    }

    /**
     * @see java.util.Observer#update(java.util.Observable, java.lang.Object)
     */
    public void update(Observable observable, Object obj) {
        clear();
    }

    /**
     * Shows a PdfObject as text or in a table.
     *
     * @param object the object that needs to be shown.
     */
    public void render(PdfObject object) {
        if (object == null) {
            text.setText(null);
            layout.show(this, TEXT);
            this.repaint();
            text.repaint();
            return;
        }
        switch (object.type()) {
            case PdfObject.DICTIONARY:
            case PdfObject.STREAM:
                table.setModel(new DictionaryTableModel((PdfDictionary) object));
                layout.show(this, TABLE);
                this.repaint();
                break;
            case PdfObject.ARRAY:
                table.setModel(new PdfArrayTableModel((PdfArray) object));
                layout.show(this, TABLE);
                this.repaint();
                break;
            default:
                text.setText(object.toString());
                layout.show(this, TEXT);
                break;
        }
    }

}