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1 package jimm.datavision.gui;
2 import jimm.datavision.ErrorHandler;
3 import jimm.util.I18N;
4 import java.awt.Dimension  ;
5 import java.awt.BorderLayout ;
6 import java.awt.event.ActionListener ;
7 import java.awt.event.ActionEvent ;
8 import java.net.URL ;
9 import javax.swing.*;
10 import javax.swing.text.html.HTMLDocument ;
11 import javax.swing.text.html.HTMLFrameHyperlinkEvent ;
12 import javax.swing.event.HyperlinkListener ;
13 import javax.swing.event.HyperlinkEvent ;
14
15
20 public class HelpWin extends JFrame implements HyperlinkListener {
21
22 protected static final int START_WIDTH = 400;
23 protected static final int START_HEIGHT = 500;
24 protected static final String DOCS_DIR = "docs";
25 protected static final String HTML_DIR = "DataVision";
26 protected static final String START_CONTENT_FILE = "DataVision.html";
27
28 protected static final String HOME_ICON = "images/Home16.gif";
29 protected static final String PREV_ICON = "images/Back16.gif";
30 protected static final String NEXT_ICON = "images/Forward16.gif";
31
32 protected static HelpWin helpWin;
33
34 protected JEditorPane contentEditorPane;
35 protected HelpURLStack pages;
36 protected Action goHomeAction;
37 protected Action goPrevAction;
38 protected Action goNextAction;
39 protected JTextField urlField;
40
41 public static synchronized HelpWin instance() {
42 if (helpWin == null)
43 helpWin = new HelpWin();
44 return helpWin;
45 }
46
47 protected HelpWin() {
48 super(I18N.get("HelpWin.title"));
49 buildWindow();
50 pages = new HelpURLStack(contentEditorPane, urlField);
51 pack();
52 setVisible(true);
53
54 new Thread (new Runnable () {
55 public void run() { loadHelp(); }
56 }).start();
57 }
58
59 protected void buildWindow() {
60 makeActions();
61
62 getContentPane().setLayout(new BorderLayout ());
63 getContentPane().add(makeToolbar(), BorderLayout.NORTH);
64 getContentPane().add(buildContentPane(), BorderLayout.CENTER);
65 }
66
67 protected JComponent buildContentPane() {
68 contentEditorPane = new JEditorPane();
69 contentEditorPane.setEditable(false);
70
71 JScrollPane scrollPane = new JScrollPane(contentEditorPane);
73 scrollPane.setVerticalScrollBarPolicy(
74 JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
75 scrollPane.setPreferredSize(new Dimension (START_WIDTH, START_HEIGHT));
76
77 contentEditorPane.addHyperlinkListener(this);
79
80 return scrollPane;
81 }
82
83
86 protected void makeActions() {
87 URL url = getClass().getClassLoader().getResource(HOME_ICON);
88 String str = I18N.get("HelpWin.cmd_home");
89 goHomeAction = new AbstractAction(str, new ImageIcon(url, str)) {
90 public void actionPerformed(ActionEvent e) {
91 pages.goToHomePage();
92 updateNavActions();
93 }
94 };
95 goHomeAction.putValue(Action.SHORT_DESCRIPTION, str);
96 goHomeAction.setEnabled(true);
97
98 url = getClass().getClassLoader().getResource(PREV_ICON);
99 str = I18N.get("HelpWin.cmd_prev");
100 goPrevAction = new AbstractAction(str, new ImageIcon(url, str)) {
101 public void actionPerformed(ActionEvent e) {
102 pages.goToPreviousPage();
103 updateNavActions();
104 }
105 };
106 goPrevAction.putValue(Action.SHORT_DESCRIPTION, str);
107 goPrevAction.setEnabled(false);
108
109 url = getClass().getClassLoader().getResource(NEXT_ICON);
110 str = I18N.get("HelpWin.cmd_next");
111 goNextAction = new AbstractAction(str, new ImageIcon(url, str)) {
112 public void actionPerformed(ActionEvent e) {
113 pages.goToNextPage();
114 updateNavActions();
115 }
116 };
117 goNextAction.putValue(Action.SHORT_DESCRIPTION, str);
118 goNextAction.setEnabled(false);
119 }
120
121
124 protected JToolBar makeToolbar() {
125 JToolBar bar = new JToolBar(javax.swing.SwingConstants.HORIZONTAL);
126 bar.add(goHomeAction);
127 bar.add(goPrevAction);
128 bar.add(goNextAction);
129
130 urlField = new JTextField(40);
131 urlField.addActionListener(new ActionListener () {
132 public void actionPerformed(ActionEvent e) {
133 pages.goTo(urlField.getText());
134 }
135 });
136 bar.add(urlField);
137
138 return bar;
139 }
140
141
145 protected void updateNavActions() {
146 goPrevAction.setEnabled(pages.hasPrevious());
147 goNextAction.setEnabled(pages.hasNext());
148 }
149
150 protected void loadHelp() {
151 String s = null;
153 URL helpURL = null;
154 try {
155 String sep = System.getProperty("file.separator");
156 s = "file:" + System.getProperty("user.dir") + sep
157 + DOCS_DIR + sep + HTML_DIR + sep + START_CONTENT_FILE;
158 helpURL = new URL (s);
159 } catch (Exception e) {
160 ErrorHandler.error(I18N.get("HelpWin.error") + ' ' + s, e);
161 }
162
163 if (helpURL != null) {
165 pages.goTo(helpURL);
166 updateNavActions();
167 }
168 }
169
170 public void hyperlinkUpdate(HyperlinkEvent e) {
171 if (e.getEventType() != HyperlinkEvent.EventType.ACTIVATED)
172 return;
173
174 if (e instanceof HTMLFrameHyperlinkEvent ) {
175 HTMLFrameHyperlinkEvent evt = (HTMLFrameHyperlinkEvent )e;
176 HTMLDocument doc = (HTMLDocument )contentEditorPane.getDocument();
177 doc.processHTMLFrameHyperlinkEvent(evt);
178 }
179 else {
180 try {
181 pages.goTo(e.getURL());
182 updateNavActions();
183 }
184 catch (Throwable t) {
185 ErrorHandler.error(t);
186 }
187 }
188 }
189
190 }
191 |
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