Source Code Cross Referenced for MessagePanel.java in  » Database-Client » squirrel-sql-2.6.5a » net » sourceforge » squirrel_sql » client » session » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database Client » squirrel sql 2.6.5a » net.sourceforge.squirrel_sql.client.session 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        package net.sourceforge.squirrel_sql.client.session;
002:
003:        /*
004:         * Copyright (C) 2001-2004 Colin Bell
005:         * colbell@users.sourceforge.net
006:         *
007:         * This library is free software; you can redistribute it and/or
008:         * modify it under the terms of the GNU Lesser General Public
009:         * License as published by the Free Software Foundation; either
010:         * version 2.1 of the License, or (at your option) any later version.
011:         *
012:         * This library is distributed in the hope that it will be useful,
013:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
014:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
015:         * Lesser General Public License for more details.
016:         *
017:         * You should have received a copy of the GNU Lesser General Public
018:         * License along with this library; if not, write to the Free Software
019:         * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
020:         */
021:        import java.awt.Color;
022:        import java.awt.event.ActionEvent;
023:        import java.awt.event.MouseAdapter;
024:        import java.awt.event.MouseEvent;
025:        import java.util.HashMap;
026:
027:        import javax.swing.Action;
028:        import javax.swing.JTextPane;
029:        import javax.swing.SwingUtilities;
030:        import javax.swing.text.BadLocationException;
031:        import javax.swing.text.Document;
032:        import javax.swing.text.SimpleAttributeSet;
033:        import javax.swing.text.StyleConstants;
034:
035:        import net.sourceforge.squirrel_sql.fw.gui.TextPopupMenu;
036:        import net.sourceforge.squirrel_sql.fw.gui.action.BaseAction;
037:        import net.sourceforge.squirrel_sql.fw.util.DefaultExceptionFormatter;
038:        import net.sourceforge.squirrel_sql.fw.util.ExceptionFormatter;
039:        import net.sourceforge.squirrel_sql.fw.util.IMessageHandler;
040:        import net.sourceforge.squirrel_sql.fw.util.StringManager;
041:        import net.sourceforge.squirrel_sql.fw.util.StringManagerFactory;
042:        import net.sourceforge.squirrel_sql.fw.util.log.ILogger;
043:        import net.sourceforge.squirrel_sql.fw.util.log.LoggerController;
044:
045:        /**
046:         * This is the message panel at the bottom of the session sheet.
047:         *
048:         * @author <A HREF="mailto:colbell@users.sourceforge.net">Colin Bell</A>
049:         */
050:        public class MessagePanel extends JTextPane implements  IMessageHandler {
051:            static final long serialVersionUID = 5859398063643519072L;
052:
053:            /** Logger for this class. */
054:            private static final ILogger s_log = LoggerController
055:                    .createLogger(MessagePanel.class);
056:
057:            /** Internationalized strings for this class. */
058:            private static final StringManager s_stringMgr = StringManagerFactory
059:                    .getStringManager(MessagePanel.class);
060:
061:            /** Popup menu for this component. */
062:            private final TextPopupMenu _popupMenu = new MessagePanelPopupMenu();
063:
064:            /**
065:             * Attribute sets for error and last message.
066:             */
067:            private SimpleAttributeSet _saSetMessage;
068:            //	private SimpleAttributeSet _saSetErrorHistory;
069:            private SimpleAttributeSet _saSetError;
070:            private SimpleAttributeSet _saSetWarning;
071:
072:            /**
073:             * Save into these attributes the parameters of the last message being output.
074:             * @todo In the near future: if more than one message shall be remembered, then these variables
075:             * need to be replaced with a dynamic storage (ArrayList or similar).
076:             */
077:            private int _lastLength;
078:            private String _lastMessage;
079:            private SimpleAttributeSet _lastSASet;
080:
081:            private HashMap<SimpleAttributeSet, SimpleAttributeSet> _saSetHistoryBySaSet = new HashMap<SimpleAttributeSet, SimpleAttributeSet>();
082:
083:            private static interface I18N {
084:                //i18n[MessagePanel.clearLabel=Clear]
085:                String CLEAR_LABEL = s_stringMgr
086:                        .getString("MessagePanel.clearLabel");
087:            }
088:
089:            private DefaultExceptionFormatter defaultExceptionFormatter = new DefaultExceptionFormatter();
090:
091:            /**
092:             * Default ctor.
093:             */
094:            public MessagePanel() {
095:                super ();
096:
097:                _popupMenu.setTextComponent(this );
098:
099:                // Add mouse listener for displaying popup menu.
100:                addMouseListener(new MouseAdapter() {
101:                    public void mousePressed(MouseEvent evt) {
102:                        if (evt.isPopupTrigger()) {
103:                            _popupMenu.show(evt);
104:                        }
105:                    }
106:
107:                    public void mouseReleased(MouseEvent evt) {
108:                        if (evt.isPopupTrigger()) {
109:                            _popupMenu.show(evt);
110:                        }
111:                    }
112:                });
113:
114:                ///////////////////////////////////////////////////////////////////
115:                // Message
116:                _saSetMessage = new SimpleAttributeSet();
117:                StyleConstants.setBackground(_saSetMessage, Color.green);
118:
119:                SimpleAttributeSet saSetMessageHistory = new SimpleAttributeSet();
120:                StyleConstants.setBackground(saSetMessageHistory,
121:                        getBackground());
122:                _saSetHistoryBySaSet.put(_saSetMessage, saSetMessageHistory);
123:                //
124:                ////////////////////////////////////////////////////////////////
125:
126:                ///////////////////////////////////////////////////////////////////
127:                // Warning
128:                _saSetWarning = new SimpleAttributeSet();
129:                StyleConstants.setBackground(_saSetWarning, Color.yellow);
130:
131:                SimpleAttributeSet saSetWarningHistory = new SimpleAttributeSet();
132:                StyleConstants.setBackground(saSetWarningHistory, new Color(
133:                        255, 255, 210)); // a light yellow
134:                _saSetHistoryBySaSet.put(_saSetWarning, saSetWarningHistory);
135:                //
136:                ////////////////////////////////////////////////////////////////
137:
138:                /////////////////////////////////////////////////////////////////
139:                // Error
140:                _saSetError = new SimpleAttributeSet();
141:                StyleConstants.setBackground(_saSetError, Color.red);
142:
143:                SimpleAttributeSet saSetErrorHistory = new SimpleAttributeSet();
144:                StyleConstants.setBackground(saSetErrorHistory, Color.pink);
145:                _saSetHistoryBySaSet.put(_saSetError, saSetErrorHistory);
146:                //
147:                //////////////////////////////////////////////////////////////////
148:
149:            }
150:
151:            public void addToMessagePanelPopup(Action action) {
152:                if (action == null) {
153:                    throw new IllegalArgumentException("action cannot be null");
154:                }
155:                _popupMenu.add(action);
156:            }
157:
158:            /**
159:             * Show a message describing the passed throwable object.
160:             *
161:             * @param th	The throwable object.
162:             * @param session the session that generated the exception.
163:             */
164:            public synchronized void showMessage(final Throwable th,
165:                    final ExceptionFormatter formatter) {
166:                if (th == null) {
167:                    throw new IllegalArgumentException("th cannot be null");
168:                }
169:                privateShowMessage(th, formatter, _saSetMessage);
170:            }
171:
172:            /**
173:             * Show an error message describing the passed exception. The controls
174:             * background color will be changed to show it is an error msg.
175:             *
176:             * @param	th		Exception.
177:             * @param session the session that generated the exception. 
178:             */
179:            public synchronized void showErrorMessage(final Throwable th,
180:                    ExceptionFormatter formatter) {
181:                if (th == null) {
182:                    throw new IllegalArgumentException("th cannot be null");
183:                }
184:                privateShowMessage(th, formatter, _saSetError);
185:            }
186:
187:            /**
188:             * Show a message.
189:             *
190:             * @param msg	The message to be shown.
191:             */
192:            public synchronized void showMessage(final String msg) {
193:                if (msg == null) {
194:                    throw new IllegalArgumentException("msg cannot be null");
195:                }
196:                privateShowMessage(msg, _saSetMessage);
197:            }
198:
199:            public void showWarningMessage(String msg) {
200:                if (msg == null) {
201:                    throw new IllegalArgumentException("msg cannot be null");
202:
203:                }
204:                privateShowMessage(msg, _saSetWarning);
205:            }
206:
207:            /**
208:             * Show an error message. The controls
209:             * background color will be changed to show it is an error msg.
210:             * @param	th		Exception.
211:             */
212:            public synchronized void showErrorMessage(final String msg) {
213:                if (msg == null) {
214:                    throw new IllegalArgumentException("msg cannot be null");
215:                }
216:                privateShowMessage(msg, _saSetError);
217:            }
218:
219:            /**
220:             * Private method, the real implementation of the corresponding show*Message methods.
221:             *
222:             * @param th	The throwable whose details shall be displayed.
223:             * @param saSet The SimpleAttributeSet to be used for message output.
224:             */
225:            private void privateShowMessage(final Throwable th,
226:                    final ExceptionFormatter formatter,
227:                    final SimpleAttributeSet saSet) {
228:                if (th != null) {
229:
230:                    String message = "";
231:                    if (formatter == null) {
232:                        message = defaultExceptionFormatter.format(th);
233:                    } else {
234:                        try {
235:                            message = formatter.format(th);
236:                        } catch (Exception e) {
237:                            s_log.error("Unable to format message: "
238:                                    + e.getMessage(), e);
239:                        }
240:                    }
241:                    privateShowMessage(message, saSet);
242:                    if (s_log.isDebugEnabled()) {
243:                        s_log.debug("Exception message shown in MessagePanel: "
244:                                + message);
245:                    }
246:                }
247:            }
248:
249:            /**
250:             * Private method, the real implementation of the corresponding show*Message methods.
251:             *
252:             * @param msg	The message to be displayed.
253:             * @param saSet	The SimpleAttributeSet to be used for message output.
254:             */
255:            private void privateShowMessage(final String msg,
256:                    final SimpleAttributeSet saSet) {
257:                if (msg == null) {
258:                    throw new IllegalArgumentException("null Message");
259:                }
260:
261:                // Thread safe support for every call to this method:
262:                SwingUtilities.invokeLater(new Runnable() {
263:                    public void run() {
264:                        addLine(msg, saSet);
265:                    }
266:                });
267:            }
268:
269:            /**
270:             * Do the real appending of text to the message panel. The last message is always highlighted.
271:             * @todo Highlight not only the last message, but all messages from SQL statements which were run together.
272:             *
273:             * @param string	The String to be appended.
274:             * @param saSet		The SimpleAttributeSet to be used for for the string.
275:             */
276:            private void append(String string, SimpleAttributeSet saSet) {
277:                Document document = getStyledDocument();
278:                try {
279:                    /////////////////////////////////////////////////////////////////////////////////
280:                    // Checks if the former message should be highlighted in a 'history' color.
281:                    if (document.getLength() >= _lastLength
282:                            && null != _lastMessage) {
283:                        SimpleAttributeSet historySaSet = _saSetHistoryBySaSet
284:                                .get(_lastSASet);
285:                        document.remove(_lastLength, _lastMessage.length());
286:                        document.insertString(document.getLength(),
287:                                _lastMessage, historySaSet);
288:                    }
289:                    //
290:                    ///////////////////////////////////////////////////////////////////////////////////
291:
292:                    _lastLength = document.getLength();
293:                    _lastMessage = string;
294:                    _lastSASet = saSet;
295:
296:                    document.insertString(document.getLength(), string, saSet);
297:                } catch (BadLocationException ble) {
298:                    s_log.error(
299:                            "Error appending text to MessagePanel document.",
300:                            ble);
301:                }
302:            }
303:
304:            /**
305:             * Add the passed line to the end of the messages display. Position
306:             * display so the the newly added line will be displayed.
307:             *
308:             * @param line		The line to be added.
309:             * @param saSet		The SimpleAttributeSet to be used for for the string.
310:             */
311:            private void addLine(String line, SimpleAttributeSet saSet) {
312:                if (getDocument().getLength() > 0) {
313:                    append("\n", saSet);
314:                }
315:                append(line, saSet);
316:                final int len = getDocument().getLength();
317:                select(len, len);
318:            }
319:
320:            /**
321:             * Popup menu for this message panel.
322:             */
323:            private class MessagePanelPopupMenu extends TextPopupMenu {
324:                static final long serialVersionUID = -425002646648750251L;
325:
326:                public MessagePanelPopupMenu() {
327:                    super ();
328:                    add(new ClearAction());
329:                }
330:
331:                /**
332:                 * Class handles clearing the message area. Resets the background
333:                 * colour (to get rid of error msg colour) as well as clearing
334:                 * the text.
335:                 */
336:                private class ClearAction extends BaseAction {
337:                    static final long serialVersionUID = 2124058843445088350L;
338:
339:                    protected ClearAction() {
340:                        super (I18N.CLEAR_LABEL);
341:                    }
342:
343:                    public void actionPerformed(ActionEvent evt) {
344:                        try {
345:                            Document doc = MessagePanel.this .getDocument();
346:                            doc.remove(0, doc.getLength());
347:                            _lastMessage = null;
348:                        } catch (BadLocationException ex) {
349:                            s_log.error("Error clearing document", ex);
350:                        }
351:                    }
352:                }
353:            }
354:        }
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