/[svn]/qsampler/trunk/src/qsamplerMessages.cpp
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Contents of /qsampler/trunk/src/qsamplerMessages.cpp

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Revision 338 - (show annotations) (download)
Wed Jan 12 10:43:37 2005 UTC (17 years, 4 months ago) by capela
File size: 7370 byte(s)
~Messages limit optimization with Qt::LogText format (QTextEdit).

1 // qsamplerMessages.cpp
2 //
3 /****************************************************************************
4 Copyright (C) 2003-2005, rncbc aka Rui Nuno Capela. All rights reserved.
5
6 This program is free software; you can redistribute it and/or
7 modify it under the terms of the GNU General Public License
8 as published by the Free Software Foundation; either version 2
9 of the License, or (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19
20 *****************************************************************************/
21
22 #include "qsamplerMessages.h"
23
24 #include <qsocketnotifier.h>
25 #include <qstringlist.h>
26 #include <qtextedit.h>
27 #include <qdatetime.h>
28 #include <qtooltip.h>
29 #include <qpixmap.h>
30
31 #include "config.h"
32
33 #if !defined(WIN32)
34 #include <unistd.h>
35 #endif
36
37 // The default maximum number of message lines.
38 #define QSAMPLER_MESSAGES_MAXLINES 1000
39
40 // Notification pipe descriptors
41 #define QSAMPLER_MESSAGES_FDNIL -1
42 #define QSAMPLER_MESSAGES_FDREAD 0
43 #define QSAMPLER_MESSAGES_FDWRITE 1
44
45
46 //-------------------------------------------------------------------------
47 // qsamplerMessages - Messages log dockable window.
48 //
49
50 // Constructor.
51 qsamplerMessages::qsamplerMessages ( QWidget *pParent, const char *pszName )
52 : QDockWindow(pParent, pszName)
53 {
54 #if QT_VERSION >= 0x030200
55 m_pTextView->setTextFormat(Qt::LogText);
56 #endif
57 // Initialize default message limit.
58 setMessagesLimit(QSAMPLER_MESSAGES_MAXLINES);
59
60 // Intialize stdout capture stuff.
61 m_pStdoutNotifier = NULL;
62 m_fdStdout[QSAMPLER_MESSAGES_FDREAD] = QSAMPLER_MESSAGES_FDNIL;
63 m_fdStdout[QSAMPLER_MESSAGES_FDWRITE] = QSAMPLER_MESSAGES_FDNIL;
64
65 // Surely a name is crucial (e.g.for storing geometry settings)
66 if (pszName == 0)
67 QDockWindow::setName("qsamplerMessages");
68
69 // Create local text view widget.
70 m_pTextView = new QTextEdit(this);
71 // QFont font(m_pTextView->font());
72 // font.setFamily("Fixed");
73 // m_pTextView->setFont(font);
74 m_pTextView->setWordWrap(QTextEdit::NoWrap);
75 m_pTextView->setReadOnly(true);
76 m_pTextView->setUndoRedoEnabled(false);
77
78 // Prepare the dockable window stuff.
79 QDockWindow::setWidget(m_pTextView);
80 QDockWindow::setOrientation(Qt::Horizontal);
81 QDockWindow::setCloseMode(QDockWindow::Always);
82 QDockWindow::setResizeEnabled(true);
83
84 // Finally set the default caption and tooltip.
85 QString sCaption = tr("Messages");
86 QToolTip::add(this, sCaption);
87 QDockWindow::setCaption(sCaption);
88 }
89
90
91 // Destructor.
92 qsamplerMessages::~qsamplerMessages (void)
93 {
94 // No more notifications.
95 if (m_pStdoutNotifier)
96 delete m_pStdoutNotifier;
97
98 // No need to delete child widgets, Qt does it all for us.
99 }
100
101
102 // Own stdout/stderr socket notifier slot.
103 void qsamplerMessages::stdoutNotify ( int fd )
104 {
105 #if !defined(WIN32)
106 char achBuffer[1024];
107 int cchBuffer = ::read(fd, achBuffer, sizeof(achBuffer) - 1);
108 if (cchBuffer > 0) {
109 achBuffer[cchBuffer] = (char) 0;
110 appendStdoutBuffer(achBuffer);
111 }
112 #endif
113 }
114
115
116 // Stdout buffer handler -- now splitted by complete new-lines...
117 void qsamplerMessages::appendStdoutBuffer ( const QString& s )
118 {
119 m_sStdoutBuffer.append(s);
120
121 int iLength = m_sStdoutBuffer.findRev('\n') + 1;
122 if (iLength > 0) {
123 QString sTemp = m_sStdoutBuffer.left(iLength);
124 m_sStdoutBuffer.remove(0, iLength);
125 QStringList list = QStringList::split('\n', sTemp, true);
126 for (QStringList::Iterator iter = list.begin(); iter != list.end(); iter++)
127 appendMessagesText(*iter);
128 }
129 }
130
131
132 // Stdout flusher -- show up any unfinished line...
133 void qsamplerMessages::flushStdoutBuffer (void)
134 {
135 if (!m_sStdoutBuffer.isEmpty()) {
136 appendMessagesText(m_sStdoutBuffer);
137 m_sStdoutBuffer.truncate(0);
138 }
139 }
140
141
142 // Stdout capture accessors.
143 bool qsamplerMessages::isCaptureEnabled (void)
144 {
145 return (bool) (m_pStdoutNotifier != NULL);
146 }
147
148 void qsamplerMessages::setCaptureEnabled ( bool bCapture )
149 {
150 // Flush current buffer.
151 flushStdoutBuffer();
152
153 #if !defined(WIN32)
154 // Destroy if already enabled.
155 if (!bCapture && m_pStdoutNotifier) {
156 delete m_pStdoutNotifier;
157 m_pStdoutNotifier = NULL;
158 // Close the notification pipes.
159 if (m_fdStdout[QSAMPLER_MESSAGES_FDREAD] != QSAMPLER_MESSAGES_FDNIL) {
160 ::close(m_fdStdout[QSAMPLER_MESSAGES_FDREAD]);
161 m_fdStdout[QSAMPLER_MESSAGES_FDREAD] = QSAMPLER_MESSAGES_FDNIL;
162 }
163 if (m_fdStdout[QSAMPLER_MESSAGES_FDREAD] != QSAMPLER_MESSAGES_FDNIL) {
164 ::close(m_fdStdout[QSAMPLER_MESSAGES_FDREAD]);
165 m_fdStdout[QSAMPLER_MESSAGES_FDREAD] = QSAMPLER_MESSAGES_FDNIL;
166 }
167 }
168 // Are we going to make up the capture?
169 if (bCapture && m_pStdoutNotifier == NULL && ::pipe(m_fdStdout) == 0) {
170 ::dup2(m_fdStdout[QSAMPLER_MESSAGES_FDWRITE], STDOUT_FILENO);
171 ::dup2(m_fdStdout[QSAMPLER_MESSAGES_FDWRITE], STDERR_FILENO);
172 m_pStdoutNotifier = new QSocketNotifier(m_fdStdout[QSAMPLER_MESSAGES_FDREAD], QSocketNotifier::Read, this);
173 QObject::connect(m_pStdoutNotifier, SIGNAL(activated(int)), this, SLOT(stdoutNotify(int)));
174 }
175 #endif
176 }
177
178
179 // Message font accessors.
180 QFont qsamplerMessages::messagesFont (void)
181 {
182 return m_pTextView->font();
183 }
184
185 void qsamplerMessages::setMessagesFont( const QFont& font )
186 {
187 m_pTextView->setFont(font);
188 }
189
190
191 // Maximum number of message lines accessors.
192 int qsamplerMessages::messagesLimit (void)
193 {
194 return m_iMessagesLimit;
195 }
196
197 void qsamplerMessages::setMessagesLimit ( int iMessagesLimit )
198 {
199 m_iMessagesLimit = iMessagesLimit;
200 m_iMessagesHigh = iMessagesLimit + (iMessagesLimit / 3);
201 #if QT_VERSION >= 0x030200
202 m_pTextView->setMaxLogLines(iMessagesLimit);
203 #endif
204 }
205
206
207 // The main utility methods.
208 void qsamplerMessages::appendMessages ( const QString& s )
209 {
210 appendMessagesColor(s, "#999999");
211 }
212
213 void qsamplerMessages::appendMessagesColor ( const QString& s, const QString &c )
214 {
215 appendMessagesText("<font color=\"" + c + "\">" + QTime::currentTime().toString("hh:mm:ss.zzz") + " " + s + "</font>");
216 }
217
218 void qsamplerMessages::appendMessagesText ( const QString& s )
219 {
220 #if QT_VERSION < 0x030200
221 // Check for message line limit...
222 if (m_iMessagesLimit > 0) {
223 int iParagraphs = m_pTextView->paragraphs();
224 if (iParagraphs > m_iMessagesHigh) {
225 m_pTextView->setUpdatesEnabled(false);
226 while (iParagraphs > m_iMessagesLimit) {
227 m_pTextView->removeParagraph(0);
228 iParagraphs--;
229 }
230 m_pTextView->scrollToBottom();
231 m_pTextView->setUpdatesEnabled(true);
232 }
233 }
234 #endif
235 m_pTextView->append(s);
236 }
237
238
239 // One time scroll to the most recent message.
240 void qsamplerMessages::scrollToBottom (void)
241 {
242 flushStdoutBuffer();
243 m_pTextView->scrollToBottom();
244 }
245
246
247 // end of qsamplerMessages.cpp

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