/**************************************************************************
/* A HTML GUI-component for presentation of search-results.
/*
/* Copyright (c) 2003-2004 by Bernhard Bablok (mail@bablokb.de)
/*
/* 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 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; see the file COPYING.LESSER.  If not, write to
/* the Free Software Foundation Inc., 59 Temple Place - Suite 330,
/* Boston, MA  02111-1307 USA
/**************************************************************************/

package de.bablokb.luala.lib.gui;

import java.net.*;
import java.awt.*;
import java.io.*;
import javax.swing.*;
import javax.swing.event.*;
import de.bablokb.luala.lib.event.*;

/**
   A HTML GUI-component for presentation of search-results.

   @version $Revision: 1.7 $
   @author  $Author: bablokb $
*/

public class HtmlResultView implements ResultView {

  /////////////////////////////////////////////////////////////////////////////

  /**
     Default window-size constant.
  */

  private final static int 
    DEFAULT_WIDTH = 500,
    DEFAULT_HEIGHT = 500;

  ////////////////////////////////////////////////////////////////////////////

  /**
     The JEditorPane for the presentation of the results. This pane uses the
     HTMLEditorKit, since we want to use hyperlink events.
  */

  private JEditorPane iResultPane;

  ////////////////////////////////////////////////////////////////////////////

  /**
     The {@link ShowDocumentEventListener}. We actually nead a list, but in most
     cases a single {@link ShowDocumentEventListener} should do.
  */
     
  private ShowDocumentEventListener iListener;

  ////////////////////////////////////////////////////////////////////////////

  /**
     Create a HtmlResultView object.
  */

  public HtmlResultView(URL page) throws IOException {
    iResultPane = new JEditorPane(page);
    iResultPane.setContentType("text/html");
    iResultPane.setEditable(false);
    iResultPane.setPreferredSize(new Dimension(DEFAULT_WIDTH,DEFAULT_HEIGHT));
    iResultPane.addHyperlinkListener(new HyperlinkListener() {
	public void hyperlinkUpdate(HyperlinkEvent e) {
	  if (iListener != null && 
              e.getEventType() == HyperlinkEvent.EventType.ACTIVATED) {
	    iListener.showDocument(
              new ShowDocumentEvent(e.getSource(),e.getURL().toString()));
	  }
	}
      }
    );
  }

  ////////////////////////////////////////////////////////////////////////////

  /**
     {@inheritDoc}
  */

  public JComponent getGUI() {
    return new JScrollPane(iResultPane);
  }

  ////////////////////////////////////////////////////////////////////////////

  /**
     {@inheritDoc}
  */

  public void addShowDocumentEventListener(ShowDocumentEventListener sdel) {
    iListener = sdel;
  }

  ////////////////////////////////////////////////////////////////////////////

  /**
     {@inheritDoc}
  */

  public void setData(Object data) {
    iResultPane.setText((String) data);
  }
}