BeanyBaby


1   // HTMLParser Library $Name: v1_5_20050313 $ - A java-based parser for HTML
2   // http://sourceforge.org/projects/htmlparser
3   // Copyright (C) 2004 Derrick Oswald
4   //
5   // Revision Control Information
6   //
7   // $Source: /cvsroot/htmlparser/htmlparser/src/org/htmlparser/beans/BeanyBaby.java,v $
8   // $Author: derrickoswald $
9   // $Date: 2005/03/12 21:39:45 $
10  // $Revision: 1.23 $
11  //
12  // This library is free software; you can redistribute it and/or
13  // modify it under the terms of the GNU Lesser General Public
14  // License as published by the Free Software Foundation; either
15  // version 2.1 of the License, or (at your option) any later version.
16  //
17  // This library is distributed in the hope that it will be useful,
18  // but WITHOUT ANY WARRANTY; without even the implied warranty of
19  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20  // Lesser General Public License for more details.
21  //
22  // You should have received a copy of the GNU Lesser General Public
23  // License along with this library; if not, write to the Free Software
24  // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25  //
26  
27  package org.htmlparser.beans;
28  
29  import javax.swing.JCheckBoxMenuItem  ;
30  import javax.swing.JMenuItem  ;
31  
32  /**
33   * Demo of beans.
34   * Created on December 30, 2002, 7:54 PM
35   * @author Derrick Oswald
36   */
37  public class BeanyBaby
38      extends
39          javax.swing.JFrame  
40      implements
41          java.beans.PropertyChangeListener  ,
42          java.awt.event.ActionListener  ,
43          java.awt.event.MouseListener  
44  {
45      /**
46       * Bread crumb trail of visited URLs.
47       */
48      java.util.Vector   mTrail;
49  
50      /**
51       * Current position on the bread crumb trail.
52       */
53      int mCrumb;
54  
55      /** Creates new form BeanyBaby */
56      public BeanyBaby ()
57      {
58          initComponents ();
59          mTrail = new java.util.Vector   (25);
60          mCrumb = -1;
61  
62          // shenanigans to get the splitter bar at the midpoint
63          setVisible (true);
64          mSplitPane.setDividerLocation(0.5);
65          setVisible (false);
66  
67          // set up twinning
68          mLinkBean.addPropertyChangeListener (this);
69          mStringBean.addPropertyChangeListener (this);
70          // set up user input
71          mTextField.addActionListener (this);
72          mLinkBean.addMouseListener (this);
73  
74          // set initial checkbox states
75          mLinks.setSelected (mStringBean.getLinks ());
76          mCollapse.setSelected (mStringBean.getCollapse ());
77          mNobreak.setSelected (mStringBean.getReplaceNonBreakingSpaces ());
78      }
79  
80      //
81      // PropertyChangeListener interface
82      //
83  
84      /**
85       * This method ties the two beans together on the same connection.
86       * Whenever a property changes on one bean, make sure the URL properties
87       * agree by setting the URL from one to the other.
88       * @param event The event describing the event source
89       * and the property that has changed.
90       */
91      public void propertyChange (java.beans.PropertyChangeEvent   event)
92      {
93          Object   source;
94          String   name;
95  
96          source = event.getSource ();
97          if (source == mLinkBean)
98          {
99              if (!mLinkBean.getURL ().equals (mStringBean.getURL ()))
100                 mStringBean.setURL (mLinkBean.getURL ());
101         }
102         else if (source == mStringBean)
103         {
104             if (!mStringBean.getURL ().equals (mLinkBean.getURL ()))
105                 mLinkBean.setURL (mStringBean.getURL ());
106             // check for menu status changes
107             name = event.getPropertyName ();
108             if (name.equals (StringBean.PROP_LINKS_PROPERTY))
109                 mLinks.setSelected (((Boolean  )event.getNewValue ()).booleanValue ());
110             else if (name.equals (StringBean.PROP_COLLAPSE_PROPERTY))
111                 mCollapse.setSelected (((Boolean  )event.getNewValue ()).booleanValue ());
112             else if (name.equals (StringBean.PROP_REPLACE_SPACE_PROPERTY))
113                 mNobreak.setSelected (((Boolean  )event.getNewValue ()).booleanValue ());
114         }
115     }
116 
117     //
118     // ActionListener interface
119     //
120 
121     public void actionPerformed (java.awt.event.ActionEvent   event)
122     {
123         Object   source;
124         String   url;
125         String   name;
126         JMenuItem   item;
127 
128         source = event.getSource ();
129         if (source == mTextField)
130         {
131             url = mTextField.getText ();
132             mTextField.selectAll ();
133             setURL (url);
134         }
135         else if (source instanceof JCheckBoxMenuItem  )
136         {
137             item = (JMenuItem  )source;
138             name = item.getName ();
139             if ("Links".equals (name))
140                 mStringBean.setLinks (item.isSelected ());
141             else if ("Collapse".equals (name))
142                 mStringBean.setCollapse (item.isSelected ());
143             else if ("Nobreak".equals (name))
144                 mStringBean.setReplaceNonBreakingSpaces (item.isSelected ());
145         }
146         else if (source instanceof JMenuItem  )
147         {
148             name = ((JMenuItem  )source).getName ();
149             if ("Back".equals (name))
150             {
151                 if (mCrumb > 0)
152                 {
153                     mCrumb--;
154                     url = (String  )mTrail.elementAt (mCrumb);
155                     mCrumb--;
156                     setURL (url);
157                 }
158             }
159             else if ("Forward".equals (name))
160             {
161                 if (mCrumb < mTrail.size ())
162                 {
163                     mCrumb++;
164                     url = (String  )mTrail.elementAt (mCrumb);
165                     mCrumb--;
166                     setURL (url);
167                 }
168             }
169         }
170 
171     }
172 
173     //
174     // MouseListener interface
175     //
176     /**
177      * Invoked when the mouse button has been clicked (pressed and released) on a component.
178      */
179     public void mouseClicked (java.awt.event.MouseEvent   event)
180     {
181         int index;
182         String   url;
183 
184         if (2 == event.getClickCount())
185         {
186             index = mLinkBean.locationToIndex (event.getPoint ());
187             url = mLinkBean.getModel ().getElementAt (index).toString ();
188             setURL (url);
189         }
190     }
191 
192     /**
193      * Invoked when the mouse enters a component.
194      */
195     public void mouseEntered (java.awt.event.MouseEvent   event)
196     {
197     }
198 
199     /**
200      * Invoked when the mouse exits a component.
201      */
202     public void mouseExited (java.awt.event.MouseEvent   event)
203     {
204     }
205 
206     /**
207      * Invoked when a mouse button has been pressed on a component.
208      */
209     public void mousePressed (java.awt.event.MouseEvent   event)
210     {
211     }
212 
213     /**
214      * Invoked when a mouse button has been released on a component.
215      */
216     public void mouseReleased (java.awt.event.MouseEvent   event)
217     {
218     }
219 
220     //
221     // API control
222     //
223     public void setURL (String   url)
224     {
225         mTextField.setText (url);
226         mCrumb++;
227         if (mTrail.size () <= mCrumb)
228             mTrail.addElement (url);
229         else
230             mTrail.setElementAt (url, mCrumb);
231         mLinkBean.setURL (url);
232 
233         // update navigation menu
234         mBack.setEnabled (mCrumb > 0);
235         mForward.setEnabled (mCrumb + 1 < mTrail.size ());
236     }
237 
238     /** This method is called from within the constructor to
239      * initialize the form.
240      * WARNING: Do NOT modify this code. The content of this method is
241      * always regenerated by the Form Editor.
242      */
243     private void initComponents()//GEN-BEGIN:initComponents
244     {
245         javax.swing.JMenuBar   menubar;
246         javax.swing.JScrollPane   pane1;
247         javax.swing.JScrollPane   pane2;
248         javax.swing.JMenu   go;
249         javax.swing.JMenu   options;
250         javax.swing.JPanel   panel;
251 
252         menubar = new javax.swing.JMenuBar  ();
253         setJMenuBar (menubar);
254         go = new javax.swing.JMenu  ();
255         mBack = new javax.swing.JMenuItem  ();
256         mForward = new javax.swing.JMenuItem  ();
257         options = new javax.swing.JMenu  ();
258         mLinks = new javax.swing.JCheckBoxMenuItem  ();
259         mCollapse = new javax.swing.JCheckBoxMenuItem  ();
260         mNobreak = new javax.swing.JCheckBoxMenuItem  ();
261         panel = new javax.swing.JPanel  ();
262         mSplitPane = new javax.swing.JSplitPane  ();
263         pane1 = new javax.swing.JScrollPane  ();
264         mLinkBean = new org.htmlparser.beans.HTMLLinkBean();
265         pane2 = new javax.swing.JScrollPane  ();
266         mStringBean = new org.htmlparser.beans.HTMLTextBean();
267         mTextField = new javax.swing.JTextField  ();
268 
269         go.setMnemonic('G');
270         go.setText("Go");
271         go.setToolTipText("crude URL navigation");
272         mBack.setMnemonic('B');
273         mBack.setText("Back");
274         mBack.setToolTipText("back one URL");
275         mBack.setName("Back");
276         mBack.addActionListener (this);
277         go.add(mBack);
278 
279         mForward.setMnemonic('F');
280         mForward.setText("Forward");
281         mForward.setToolTipText("forward one URL");
282         mForward.setName("Forward");
283         mForward.addActionListener (this);
284         go.add(mForward);
285 
286         menubar.add(go);
287 
288         options.setMnemonic('O');
289         options.setText("Options");
290         options.setToolTipText("Bean settings");
291         mLinks.setMnemonic('L');
292         mLinks.setText("Links");
293         mLinks.setToolTipText("show/hide links in text");
294         mLinks.setName("Links");
295         mLinks.addActionListener (this);
296         options.add(mLinks);
297 
298         mCollapse.setMnemonic('C');
299         mCollapse.setText("Collapse");
300         mCollapse.setToolTipText("collapse/retain whitespace sequences");
301         mCollapse.setName("Collapse");
302         mCollapse.addActionListener (this);
303         options.add(mCollapse);
304 
305         mNobreak.setMnemonic('N');
306         mNobreak.setText("Non-breaking Spaces");
307         mNobreak.setToolTipText("replace/retain non-breaking spaces");
308         mNobreak.setName("Nobreak");
309         mNobreak.addActionListener (this);
310         options.add(mNobreak);
311 
312         menubar.add(options);
313 
314         setTitle("BeanyBaby");
315         addWindowListener(new java.awt.event.WindowAdapter  ()
316         {
317             public void windowClosing(java.awt.event.WindowEvent   evt)
318             {
319                 exitForm(evt);
320             }
321         });
322 
323         panel.setLayout(new java.awt.BorderLayout  ());
324 
325         pane1.setViewportView(mLinkBean);
326 
327         mSplitPane.setLeftComponent(pane1);
328 
329         pane2.setViewportView(mStringBean);
330 
331         mSplitPane.setRightComponent(pane2);
332 
333         panel.add(mSplitPane, java.awt.BorderLayout.CENTER);
334 
335         mTextField.setToolTipText("Enter the URL to view");
336         panel.add(mTextField, java.awt.BorderLayout.SOUTH);
337 
338         getContentPane().add(panel, java.awt.BorderLayout.CENTER);
339 
340         pack();
341         java.awt.Dimension   screenSize = java.awt.Toolkit.getDefaultToolkit().getScreenSize();
342         setSize(new java.awt.Dimension  (640, 480));
343         setLocation((screenSize.width-640)/2,(screenSize.height-480)/2);
344     }//GEN-END:initComponents
345 
346     /** Exit the Application */
347     private void exitForm (java.awt.event.WindowEvent   evt)
348     {//GEN-FIRST:event_exitForm
349         System.exit (0);
350     }//GEN-LAST:event_exitForm
351 
352     // Variables declaration - do not modify//GEN-BEGIN:variables
353     private org.htmlparser.beans.HTMLLinkBean mLinkBean;
354     private javax.swing.JMenuItem   mForward;
355     private javax.swing.JMenuItem   mBack;
356     private javax.swing.JCheckBoxMenuItem   mCollapse;
357     private javax.swing.JTextField   mTextField;
358     private javax.swing.JSplitPane   mSplitPane;
359     private javax.swing.JCheckBoxMenuItem   mLinks;
360     private org.htmlparser.beans.HTMLTextBean mStringBean;
361     private javax.swing.JCheckBoxMenuItem   mNobreak;
362     // End of variables declaration//GEN-END:variables
363 
364     /**
365      * Unit test.
366      */
367     public static void main (String  [] args)
368     {
369         BeanyBaby bb = new BeanyBaby ();
370         bb.setVisible (true);
371         if (0 >= args.length)
372             bb.setURL ("http://www.slashdot.org");
373         else
374             bb.setURL (args[0]);
375     }
376 }
377
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