// HTMLParser Library $Name: v1_6_20060319 $ - A java-based parser for HTML
// http://sourceforge.org/projects/htmlparser
// Copyright (C) 2004 Derrick Oswald
//
// Revision Control Information
//
// $Source: /cvsroot/htmlparser/htmlparser/src/org/htmlparser/beans/BeanyBaby.java,v $
// $Author: derrickoswald $
// $Date: 2005/05/15 11:49:03 $
// $Revision: 1.25 $
//
// 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
package org.htmlparser.beans;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.beans.PropertyChangeListener;
import java.util.Vector;
import javax.swing.JCheckBoxMenuItem;
import javax.swing.JMenuItem;
/**
* Demo of beans.
* Created on December 30, 2002, 7:54 PM
* @author Derrick Oswald
*/
public class BeanyBaby
extends
javax.swing.JFrame
implements
PropertyChangeListener,
ActionListener,
MouseListener
{
/**
* Bread crumb trail of visited URLs.
*/
protected Vector mTrail;
/**
* Current position on the bread crumb trail.
*/
protected int mCrumb;
/** Creates new form BeanyBaby */
public BeanyBaby ()
{
initComponents ();
mTrail = new Vector ();
mCrumb = -1;
// shenanigans to get the splitter bar at the midpoint
setVisible (true);
mSplitPane.setDividerLocation (0.5); // 50% for each pane
setVisible (false);
// set up twinning
mLinkBean.addPropertyChangeListener (this);
mStringBean.addPropertyChangeListener (this);
// set up user input
mTextField.addActionListener (this);
mLinkBean.addMouseListener (this);
// set initial checkbox states
mLinks.setSelected (mStringBean.getLinks ());
mCollapse.setSelected (mStringBean.getCollapse ());
mNobreak.setSelected (mStringBean.getReplaceNonBreakingSpaces ());
}
//
// PropertyChangeListener interface
//
/**
* This method ties the two beans together on the same connection.
* Whenever a property changes on one bean, make sure the URL properties
* agree by setting the URL from one to the other.
* @param event The event describing the event source
* and the property that has changed.
*/
public void propertyChange (java.beans.PropertyChangeEvent event)
{
Object source;
String name;
source = event.getSource ();
if (source == mLinkBean)
{
if (!mLinkBean.getURL ().equals (mStringBean.getURL ()))
mStringBean.setURL (mLinkBean.getURL ());
}
else if (source == mStringBean)
{
if (!mStringBean.getURL ().equals (mLinkBean.getURL ()))
mLinkBean.setURL (mStringBean.getURL ());
// check for menu status changes
name = event.getPropertyName ();
if (name.equals (StringBean.PROP_LINKS_PROPERTY))
mLinks.setSelected (
((Boolean)event.getNewValue ()).booleanValue ());
else if (name.equals (StringBean.PROP_COLLAPSE_PROPERTY))
mCollapse.setSelected (
((Boolean)event.getNewValue ()).booleanValue ());
else if (name.equals (StringBean.PROP_REPLACE_SPACE_PROPERTY))
mNobreak.setSelected (
((Boolean)event.getNewValue ()).booleanValue ());
}
}
//
// ActionListener interface
//
/**
* Handles UI events.
* Changing the URL in the text field, altering a checkbox setting or
* choosing a menu item winds up here, where the appropriate change
* is made to the state of the bean.
* @param event Details about the action.
*/
public void actionPerformed (ActionEvent event)
{
Object source;
String url;
String name;
JMenuItem item;
source = event.getSource ();
if (source == mTextField)
{
url = mTextField.getText ();
mTextField.selectAll ();
setURL (url);
}
else if (source instanceof JCheckBoxMenuItem)
{
item = (JMenuItem)source;
name = item.getName ();
if ("Links".equals (name))
mStringBean.setLinks (item.isSelected ());
else if ("Collapse".equals (name))
mStringBean.setCollapse (item.isSelected ());
else if ("Nobreak".equals (name))
mStringBean.setReplaceNonBreakingSpaces (item.isSelected ());
}
else if (source instanceof JMenuItem)
{
name = ((JMenuItem)source).getName ();
if ("Back".equals (name))
{
if (mCrumb > 0)
{
mCrumb--;
url = (String)mTrail.elementAt (mCrumb);
mCrumb--;
setURL (url);
}
}
else if ("Forward".equals (name))
{
if (mCrumb < mTrail.size ())
{
mCrumb++;
url = (String)mTrail.elementAt (mCrumb);
mCrumb--;
setURL (url);
}
}
}
}
//
// MouseListener interface
//
/**
* Invoked when the mouse button has been clicked on a component.
* A mouse click is a press and release of a mouse button.
* @param event Details on the mouse event.
*/
public void mouseClicked (MouseEvent event)
{
int index;
String url;
if (2 == event.getClickCount())
{
index = mLinkBean.locationToIndex (event.getPoint ());
url = mLinkBean.getModel ().getElementAt (index).toString ();
setURL (url);
}
}
/**
* Invoked when the mouse enters a component.
* @param event Details on the mouse event.
*/
public void mouseEntered (MouseEvent event)
{
}
/**
* Invoked when the mouse exits a component.
* @param event Details on the mouse event.
*/
public void mouseExited (MouseEvent event)
{
}
/**
* Invoked when a mouse button has been pressed on a component.
* @param event Details on the mouse event.
*/
public void mousePressed (MouseEvent event)
{
}
/**
* Invoked when a mouse button has been released on a component.
* @param event Details on the mouse event.
*/
public void mouseReleased (MouseEvent event)
{
}
//
// API control
//
/**
* Set the URL for the bean.
* @param url The URL to use in the bean.
*/
public void setURL (String url)
{
mTextField.setText (url);
mCrumb++;
if (mTrail.size () <= mCrumb)
mTrail.addElement (url);
else
mTrail.setElementAt (url, mCrumb);
mLinkBean.setURL (url);
// update navigation menu
mBack.setEnabled (mCrumb > 0);
mForward.setEnabled (mCrumb + 1 < mTrail.size ());
}
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
*/
private void initComponents()//GEN-BEGIN:initComponents
{
javax.swing.JMenuBar menubar;
javax.swing.JScrollPane pane1;
javax.swing.JScrollPane pane2;
javax.swing.JMenu go;
javax.swing.JMenu options;
javax.swing.JPanel panel;
menubar = new javax.swing.JMenuBar();
setJMenuBar (menubar);
go = new javax.swing.JMenu();
mBack = new javax.swing.JMenuItem();
mForward = new javax.swing.JMenuItem();
options = new javax.swing.JMenu();
mLinks = new javax.swing.JCheckBoxMenuItem();
mCollapse = new javax.swing.JCheckBoxMenuItem();
mNobreak = new javax.swing.JCheckBoxMenuItem();
panel = new javax.swing.JPanel();
mSplitPane = new javax.swing.JSplitPane();
pane1 = new javax.swing.JScrollPane();
mLinkBean = new org.htmlparser.beans.HTMLLinkBean();
pane2 = new javax.swing.JScrollPane();
mStringBean = new org.htmlparser.beans.HTMLTextBean();
mTextField = new javax.swing.JTextField();
go.setMnemonic('G');
go.setText("Go");
go.setToolTipText("crude URL navigation");
mBack.setMnemonic('B');
mBack.setText("Back");
mBack.setToolTipText("back one URL");
mBack.setName("Back");
mBack.addActionListener (this);
go.add(mBack);
mForward.setMnemonic('F');
mForward.setText("Forward");
mForward.setToolTipText("forward one URL");
mForward.setName("Forward");
mForward.addActionListener (this);
go.add(mForward);
menubar.add(go);
options.setMnemonic('O');
options.setText("Options");
options.setToolTipText("Bean settings");
mLinks.setMnemonic('L');
mLinks.setText("Links");
mLinks.setToolTipText("show/hide links in text");
mLinks.setName("Links");
mLinks.addActionListener (this);
options.add(mLinks);
mCollapse.setMnemonic('C');
mCollapse.setText("Collapse");
mCollapse.setToolTipText("collapse/retain whitespace sequences");
mCollapse.setName("Collapse");
mCollapse.addActionListener (this);
options.add(mCollapse);
mNobreak.setMnemonic('N');
mNobreak.setText("Non-breaking Spaces");
mNobreak.setToolTipText("replace/retain non-breaking spaces");
mNobreak.setName("Nobreak");
mNobreak.addActionListener (this);
options.add(mNobreak);
menubar.add(options);
setTitle("BeanyBaby");
addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent evt)
{
exitForm(evt);
}
});
panel.setLayout(new BorderLayout());
pane1.setViewportView(mLinkBean);
mSplitPane.setLeftComponent(pane1);
pane2.setViewportView(mStringBean);
mSplitPane.setRightComponent(pane2);
panel.add(mSplitPane, BorderLayout.CENTER);
mTextField.setToolTipText("Enter the URL to view");
panel.add(mTextField, BorderLayout.SOUTH);
getContentPane().add(panel, BorderLayout.CENTER);
pack();
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
setSize(new Dimension(640, 480));
setLocation((screenSize.width-640)/2,(screenSize.height-480)/2);
}//GEN-END:initComponents
/** Exit the Application
* @param event Details about the window event. */
private void exitForm (WindowEvent event)
{//GEN-FIRST:event_exitForm
System.exit (0);
}//GEN-LAST:event_exitForm
// Variables declaration - do not modify//GEN-BEGIN:variables
private org.htmlparser.beans.HTMLLinkBean mLinkBean;
private javax.swing.JMenuItem mForward;
private javax.swing.JMenuItem mBack;
private javax.swing.JCheckBoxMenuItem mCollapse;
private javax.swing.JTextField mTextField;
private javax.swing.JSplitPane mSplitPane;
private javax.swing.JCheckBoxMenuItem mLinks;
private org.htmlparser.beans.HTMLTextBean mStringBean;
private javax.swing.JCheckBoxMenuItem mNobreak;
// End of variables declaration//GEN-END:variables
/**
* Unit test.
* @param args [0] The URL to use in the bean (optional).
*/
public static void main (String[] args)
{
BeanyBaby bb = new BeanyBaby ();
bb.setVisible (true);
if (0 >= args.length)
bb.setURL ("http://www.slashdot.org");
else
bb.setURL (args[0]);
}
}