trunk/src/qsamplerMessages.cpp

// qsamplerMessages.cpp
//
/****************************************************************************
   Copyright (C) 2004-2021, rncbc aka Rui Nuno Capela. All rights reserved.
   Copyright (C) 2007, Christian Schoenebeck

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License
   as published by the Free Software Foundation; either version 2
   of the License, or (at your option) any later version.

   This program 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 General Public License for more details.

   You should have received a copy of the GNU General Public License along
   with this program; if not, write to the Free Software Foundation, Inc.,
   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

*****************************************************************************/

#include "qsamplerAbout.h"
#include "qsamplerMessages.h"

#include <QSocketNotifier>

#include <QFile>
#include <QTextBrowser>
#include <QTextCursor>
#include <QTextStream>
#include <QTextBlock>
#include <QDateTime>
#include <QIcon>

#if !defined(__WIN32__) && !defined(_WIN32) && !defined(WIN32)
#include <unistd.h>
#include <fcntl.h>
#endif


// Deprecated QTextStreamFunctions/Qt namespaces workaround.
#if QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)
#define endl    Qt::endl
#endif


namespace QSampler {

// The default maximum number of message lines.
#define QSAMPLER_MESSAGES_MAXLINES  1000

// Notification pipe descriptors
#define QSAMPLER_MESSAGES_FDNIL    -1
#define QSAMPLER_MESSAGES_FDREAD    0
#define QSAMPLER_MESSAGES_FDWRITE   1


//-------------------------------------------------------------------------
// QSampler::Messages - Messages log dockable window.
//

// Constructor.
Messages::Messages ( QWidget *pParent )
        : QDockWidget(pParent)
{
        // Surely a name is crucial (e.g.for storing geometry settings)
        QDockWidget::setObjectName("qsamplerMessages");

        // Intialize stdout capture stuff.
        m_pStdoutNotifier = nullptr;
        m_fdStdout[QSAMPLER_MESSAGES_FDREAD]  = QSAMPLER_MESSAGES_FDNIL;
        m_fdStdout[QSAMPLER_MESSAGES_FDWRITE] = QSAMPLER_MESSAGES_FDNIL;

        // Create local text view widget.
        m_pMessagesTextView = new QTextBrowser(this);
//  QFont font(m_pMessagesTextView->font());
//  font.setFamily("Fixed");
//  m_pMessagesTextView->setFont(font);
        m_pMessagesTextView->setLineWrapMode(QTextEdit::NoWrap);
//      m_pMessagesTextView->setReadOnly(true);
//      m_pMessagesTextView->setUndoRedoEnabled(false);
//      m_pMessagesTextView->setTextFormat(Qt::LogText);

        // Initialize default message limit.
        m_iMessagesLines = 0;
        setMessagesLimit(QSAMPLER_MESSAGES_MAXLINES);

        m_pMessagesLog = nullptr;

        // Prepare the dockable window stuff.
        QDockWidget::setWidget(m_pMessagesTextView);
//      QDockWidget::setFeatures(QDockWidget::AllDockWidgetFeatures);
        QDockWidget::setAllowedAreas(
                Qt::TopDockWidgetArea | Qt::BottomDockWidgetArea);
        // Some specialties to this kind of dock window...
        QDockWidget::setMinimumHeight(120);

        // Finally set the default caption and tooltip.
        const QString& sCaption = tr("Messages");
        QDockWidget::setWindowTitle(sCaption);
//      QDockWidget::setWindowIcon(QIcon(":/icons/qsamplerMessages.png"));
        QDockWidget::setToolTip(sCaption);
}


// Destructor.
Messages::~Messages (void)
{
        // Turn off and close logging.
        setLogging(false);

        // No more notifications.
        if (m_pStdoutNotifier)
                delete m_pStdoutNotifier;

        // No need to delete child widgets, Qt does it all for us.
}


#if defined(Q_CC_GNU) || defined(Q_CC_MINGW)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-parameter"
#endif

// Set stdout/stderr blocking mode.
bool Messages::stdoutBlock ( int fd, bool bBlock ) const
{
#if !defined(__WIN32__) && !defined(_WIN32) && !defined(WIN32)
        const int iFlags = ::fcntl(fd, F_GETFL, 0);
        const bool bNonBlock = bool(iFlags & O_NONBLOCK);
        if (bBlock && bNonBlock)
                bBlock = (::fcntl(fd, F_SETFL, iFlags & ~O_NONBLOCK) == 0);
        else
        if (!bBlock && !bNonBlock)
                bBlock = (::fcntl(fd, F_SETFL, iFlags |  O_NONBLOCK) != 0);
#endif
        return bBlock;
}


// Own stdout/stderr socket notifier slot.
void Messages::stdoutNotify ( int fd )
{
#if !defined(__WIN32__) && !defined(_WIN32) && !defined(WIN32)
        // Set non-blocking reads, if not already...
        const bool bBlock = stdoutBlock(fd, false);
        // Read as much as is available...
        QString sTemp;
        char achBuffer[1024];
        const int cchBuffer = sizeof(achBuffer) - 1;
        int cchRead = ::read(fd, achBuffer, cchBuffer);
        while (cchRead > 0) {
                achBuffer[cchRead] = (char) 0;
                sTemp.append(achBuffer);
                cchRead = (bBlock ? 0 : ::read(fd, achBuffer, cchBuffer));
        }
        // Needs to be non-empty...
        if (!sTemp.isEmpty())
                appendStdoutBuffer(sTemp);
#endif
}

#if defined(Q_CC_GNU) || defined(Q_CC_MINGW)
#pragma GCC diagnostic pop
#endif


// Stdout buffer handler -- now splitted by complete new-lines...
void Messages::appendStdoutBuffer ( const QString& s )
{
        m_sStdoutBuffer.append(s);

        processStdoutBuffer();
}

void Messages::processStdoutBuffer (void)
{
        const int iLength = m_sStdoutBuffer.lastIndexOf('\n');
        if (iLength > 0) {
                QStringListIterator iter(m_sStdoutBuffer.left(iLength).split('\n'));
                while (iter.hasNext()) {
                        const QString& sTemp = iter.next();
                        if (!sTemp.isEmpty())
                        #if defined(__WIN32__) || defined(_WIN32) || defined(WIN32)
                                appendMessagesText(sTemp.trimmed());
                        #else
                                appendMessagesText(sTemp);
                        #endif
                }
                m_sStdoutBuffer.remove(0, iLength + 1);
        }
}


// Stdout flusher -- show up any unfinished line...
void Messages::flushStdoutBuffer (void)
{
        processStdoutBuffer();

        if (!m_sStdoutBuffer.isEmpty()) {
        #if defined(__WIN32__) || defined(_WIN32) || defined(WIN32)
                appendMessagesText(m_sStdoutBuffer.trimmed());
        #else
                appendMessagesText(m_sStdoutBuffer);
        #endif
                m_sStdoutBuffer.clear();
        }
}


// Stdout capture accessors.
bool Messages::isCaptureEnabled (void)
{
        return (m_pStdoutNotifier != nullptr);
}

void Messages::setCaptureEnabled ( bool bCapture )
{
        // Flush current buffer.
        flushStdoutBuffer();

#if !defined(__WIN32__) && !defined(_WIN32) && !defined(WIN32)
        // Destroy if already enabled.
        if (!bCapture && m_pStdoutNotifier) {
                delete m_pStdoutNotifier;
                m_pStdoutNotifier = nullptr;
                // Close the notification pipes.
                if (m_fdStdout[QSAMPLER_MESSAGES_FDREAD] != QSAMPLER_MESSAGES_FDNIL) {
                        ::close(m_fdStdout[QSAMPLER_MESSAGES_FDREAD]);
                        m_fdStdout[QSAMPLER_MESSAGES_FDREAD]  = QSAMPLER_MESSAGES_FDNIL;
                }
        }
        // Are we going to make up the capture?
        if (bCapture && m_pStdoutNotifier == nullptr && ::pipe(m_fdStdout) == 0) {
                ::dup2(m_fdStdout[QSAMPLER_MESSAGES_FDWRITE], STDOUT_FILENO);
                ::dup2(m_fdStdout[QSAMPLER_MESSAGES_FDWRITE], STDERR_FILENO);
                m_pStdoutNotifier = new QSocketNotifier(
                        m_fdStdout[QSAMPLER_MESSAGES_FDREAD], QSocketNotifier::Read, this);
                QObject::connect(m_pStdoutNotifier,
                        SIGNAL(activated(int)),
                        SLOT(stdoutNotify(int)));
        }
#endif
}


// Message font accessors.
QFont Messages::messagesFont (void)
{
        return m_pMessagesTextView->font();
}

void Messages::setMessagesFont ( const QFont& font )
{
        m_pMessagesTextView->setFont(font);
}


// Maximum number of message lines accessors.
int Messages::messagesLimit (void)
{
        return m_iMessagesLimit;
}

void Messages::setMessagesLimit ( int iMessagesLimit )
{
        m_iMessagesLimit = iMessagesLimit;
        m_iMessagesHigh  = iMessagesLimit + (iMessagesLimit / 3);
}

// Messages logging stuff.
bool Messages::isLogging (void) const
{
        return (m_pMessagesLog != nullptr);
}

void Messages::setLogging ( bool bEnabled, const QString& sFilename )
{
        if (m_pMessagesLog) {
                appendMessages(tr("Logging stopped --- %1 ---")
                        .arg(QDateTime::currentDateTime().toString()));
                m_pMessagesLog->close();
                delete m_pMessagesLog;
                m_pMessagesLog = nullptr;
        }

        if (bEnabled) {
                m_pMessagesLog = new QFile(sFilename);
                if (m_pMessagesLog->open(QIODevice::Text | QIODevice::Append)) {
                        appendMessages(tr("Logging started --- %1 ---")
                                .arg(QDateTime::currentDateTime().toString()));
                } else {
                        delete m_pMessagesLog;
                        m_pMessagesLog = nullptr;
                }
        }
}


// Messages log output method.
void Messages::appendMessagesLog ( const QString& s )
{
        if (m_pMessagesLog) {
                QTextStream(m_pMessagesLog)
                        << QTime::currentTime().toString("hh:mm:ss.zzz")
                        << ' ' << s << endl;
                m_pMessagesLog->flush();
        }
}

// Messages widget output method.
void Messages::appendMessagesLine ( const QString& s )
{
        // Check for message line limit...
        if (m_iMessagesLines > m_iMessagesHigh) {
                m_pMessagesTextView->setUpdatesEnabled(false);
                QTextCursor textCursor(m_pMessagesTextView->document()->begin());
                while (m_iMessagesLines > m_iMessagesLimit) {
                        // Move cursor extending selection
                        // from start to next line-block...
                        textCursor.movePosition(
                                QTextCursor::NextBlock, QTextCursor::KeepAnchor);
                        m_iMessagesLines--;
                }
                // Remove the excessive line-blocks...
                textCursor.removeSelectedText();
                m_pMessagesTextView->setUpdatesEnabled(true);
        }

        m_pMessagesTextView->append(s);
        m_iMessagesLines++;
}


// The main utility methods.
void Messages::appendMessages ( const QString& s )
{
        appendMessagesColor(s, Qt::gray);
}

void Messages::appendMessagesColor ( const QString& s, const QColor& rgb )
{
        appendMessagesLine("<font color=\"" + rgb.name() + "\">" + s + "</font>");
        appendMessagesLog(s);
}

void Messages::appendMessagesText ( const QString& s )
{
        appendMessagesLine(s);
        appendMessagesLog(s);
}


// History reset.
void Messages::clear (void)
{
        m_iMessagesLines = 0;
        m_pMessagesTextView->clear();
}

} // namespace QSampler


// end of qsamplerMessages.cpp
1	capela	94	// qsamplerMessages.cpp
2			//
3			/****************************************************************************
4	capela	3853	Copyright (C) 2004-2021, rncbc aka Rui Nuno Capela. All rights reserved.
5	capela	1464	Copyright (C) 2007, Christian Schoenebeck
6	capela	94
7			This program is free software; you can redistribute it and/or
8			modify it under the terms of the GNU General Public License
9			as published by the Free Software Foundation; either version 2
10			of the License, or (at your option) any later version.
11
12			This program is distributed in the hope that it will be useful,
13			but WITHOUT ANY WARRANTY; without even the implied warranty of
14			MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15			GNU General Public License for more details.
16
17	capela	920	You should have received a copy of the GNU General Public License along
18			with this program; if not, write to the Free Software Foundation, Inc.,
19			51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20	capela	94
21			*****************************************************************************/
22
23	capela	1465	#include "qsamplerAbout.h"
24	capela	94	#include "qsamplerMessages.h"
25
26	capela	1465	#include <QSocketNotifier>
27	capela	1738
28			#include <QFile>
29	capela	3788	#include <QTextBrowser>
30	capela	1465	#include <QTextCursor>
31	capela	1738	#include <QTextStream>
32	capela	1465	#include <QTextBlock>
33			#include <QDateTime>
34			#include <QIcon>
35	schoenebeck	1461
36	capela	3358	#if !defined(__WIN32__) && !defined(_WIN32) && !defined(WIN32)
37	capela	115	#include <unistd.h>
38	capela	2669	#include <fcntl.h>
39	capela	115	#endif
40
41	capela	1558
42	capela	3759	// Deprecated QTextStreamFunctions/Qt namespaces workaround.
43			#if QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)
44			#define endl Qt::endl
45			#endif
46
47
48	capela	1558	namespace QSampler {
49
50	capela	94	// The default maximum number of message lines.
51			#define QSAMPLER_MESSAGES_MAXLINES 1000
52
53			// Notification pipe descriptors
54			#define QSAMPLER_MESSAGES_FDNIL -1
55			#define QSAMPLER_MESSAGES_FDREAD 0
56			#define QSAMPLER_MESSAGES_FDWRITE 1
57
58	capela	2582
59	capela	94	//-------------------------------------------------------------------------
60	capela	1558	// QSampler::Messages - Messages log dockable window.
61	capela	94	//
62
63			// Constructor.
64	capela	1558	Messages::Messages ( QWidget *pParent )
65	capela	1739	: QDockWidget(pParent)
66	capela	94	{
67	capela	1465	// Surely a name is crucial (e.g.for storing geometry settings)
68			QDockWidget::setObjectName("qsamplerMessages");
69
70	capela	1739	// Intialize stdout capture stuff.
71	capela	3555	m_pStdoutNotifier = nullptr;
72	capela	1739	m_fdStdout[QSAMPLER_MESSAGES_FDREAD] = QSAMPLER_MESSAGES_FDNIL;
73			m_fdStdout[QSAMPLER_MESSAGES_FDWRITE] = QSAMPLER_MESSAGES_FDNIL;
74	capela	94
75	capela	1465	// Create local text view widget.
76	capela	3788	m_pMessagesTextView = new QTextBrowser(this);
77	capela	1738	// QFont font(m_pMessagesTextView->font());
78	capela	94	// font.setFamily("Fixed");
79	capela	1738	// m_pMessagesTextView->setFont(font);
80			m_pMessagesTextView->setLineWrapMode(QTextEdit::NoWrap);
81	capela	3788	// m_pMessagesTextView->setReadOnly(true);
82			// m_pMessagesTextView->setUndoRedoEnabled(false);
83	capela	1738	// m_pMessagesTextView->setTextFormat(Qt::LogText);
84	capela	94
85	capela	1465	// Initialize default message limit.
86			m_iMessagesLines = 0;
87			setMessagesLimit(QSAMPLER_MESSAGES_MAXLINES);
88
89	capela	3555	m_pMessagesLog = nullptr;
90	capela	1738
91	capela	1465	// Prepare the dockable window stuff.
92	capela	1738	QDockWidget::setWidget(m_pMessagesTextView);
93	capela	3793	// QDockWidget::setFeatures(QDockWidget::AllDockWidgetFeatures);
94	capela	1465	QDockWidget::setAllowedAreas(
95			Qt::TopDockWidgetArea \| Qt::BottomDockWidgetArea);
96	capela	772	// Some specialties to this kind of dock window...
97	capela	1465	QDockWidget::setMinimumHeight(120);
98	capela	94
99	capela	1465	// Finally set the default caption and tooltip.
100			const QString& sCaption = tr("Messages");
101			QDockWidget::setWindowTitle(sCaption);
102			// QDockWidget::setWindowIcon(QIcon(":/icons/qsamplerMessages.png"));
103			QDockWidget::setToolTip(sCaption);
104	capela	94	}
105
106
107			// Destructor.
108	capela	1558	Messages::~Messages (void)
109	capela	94	{
110	capela	1739	// Turn off and close logging.
111	capela	1738	setLogging(false);
112
113	capela	1739	// No more notifications.
114			if (m_pStdoutNotifier)
115			delete m_pStdoutNotifier;
116	capela	94
117	capela	1739	// No need to delete child widgets, Qt does it all for us.
118	capela	94	}
119
120
121	capela	3855	#if defined(Q_CC_GNU) \|\| defined(Q_CC_MINGW)
122	capela	3853	#pragma GCC diagnostic push
123			#pragma GCC diagnostic ignored "-Wunused-parameter"
124			#endif
125
126	capela	2848	// Set stdout/stderr blocking mode.
127			bool Messages::stdoutBlock ( int fd, bool bBlock ) const
128			{
129	capela	3358	#if !defined(__WIN32__) && !defined(_WIN32) && !defined(WIN32)
130	capela	2848	const int iFlags = ::fcntl(fd, F_GETFL, 0);
131			const bool bNonBlock = bool(iFlags & O_NONBLOCK);
132			if (bBlock && bNonBlock)
133			bBlock = (::fcntl(fd, F_SETFL, iFlags & ~O_NONBLOCK) == 0);
134			else
135			if (!bBlock && !bNonBlock)
136			bBlock = (::fcntl(fd, F_SETFL, iFlags \| O_NONBLOCK) != 0);
137			#endif
138			return bBlock;
139			}
140
141
142	capela	94	// Own stdout/stderr socket notifier slot.
143	capela	1558	void Messages::stdoutNotify ( int fd )
144	capela	94	{
145	capela	3358	#if !defined(__WIN32__) && !defined(_WIN32) && !defined(WIN32)
146	capela	2669	// Set non-blocking reads, if not already...
147	capela	2848	const bool bBlock = stdoutBlock(fd, false);
148	capela	2669	// Read as much as is available...
149			QString sTemp;
150	capela	1739	char achBuffer[1024];
151	capela	2669	const int cchBuffer = sizeof(achBuffer) - 1;
152			int cchRead = ::read(fd, achBuffer, cchBuffer);
153			while (cchRead > 0) {
154			achBuffer[cchRead] = (char) 0;
155			sTemp.append(achBuffer);
156	capela	2848	cchRead = (bBlock ? 0 : ::read(fd, achBuffer, cchBuffer));
157	capela	1739	}
158	capela	2669	// Needs to be non-empty...
159			if (!sTemp.isEmpty())
160			appendStdoutBuffer(sTemp);
161	capela	94	#endif
162			}
163
164	capela	3855	#if defined(Q_CC_GNU) \|\| defined(Q_CC_MINGW)
165	capela	3853	#pragma GCC diagnostic pop
166			#endif
167	capela	94
168	capela	3853
169	capela	94	// Stdout buffer handler -- now splitted by complete new-lines...
170	capela	1558	void Messages::appendStdoutBuffer ( const QString& s )
171	capela	94	{
172	capela	1465	m_sStdoutBuffer.append(s);
173	capela	94
174	capela	3788	processStdoutBuffer();
175			}
176
177			void Messages::processStdoutBuffer (void)
178			{
179	capela	2582	const int iLength = m_sStdoutBuffer.lastIndexOf('\n');
180	capela	1465	if (iLength > 0) {
181	capela	3861	QStringListIterator iter(m_sStdoutBuffer.left(iLength).split('\n'));
182			while (iter.hasNext()) {
183			const QString& sTemp = iter.next();
184			if (!sTemp.isEmpty())
185			#if defined(__WIN32__) \|\| defined(_WIN32) \|\| defined(WIN32)
186			appendMessagesText(sTemp.trimmed());
187			#else
188			appendMessagesText(sTemp);
189			#endif
190			}
191	schoenebeck	1474	m_sStdoutBuffer.remove(0, iLength + 1);
192	capela	1465	}
193	capela	94	}
194
195
196			// Stdout flusher -- show up any unfinished line...
197	capela	1558	void Messages::flushStdoutBuffer (void)
198	capela	94	{
199	capela	3861	processStdoutBuffer();
200
201	capela	1739	if (!m_sStdoutBuffer.isEmpty()) {
202	capela	3861	#if defined(__WIN32__) \|\| defined(_WIN32) \|\| defined(WIN32)
203			appendMessagesText(m_sStdoutBuffer.trimmed());
204			#else
205			appendMessagesText(m_sStdoutBuffer);
206			#endif
207	capela	2669	m_sStdoutBuffer.clear();
208	capela	1739	}
209	capela	94	}
210
211
212			// Stdout capture accessors.
213	capela	1558	bool Messages::isCaptureEnabled (void)
214	capela	94	{
215	capela	3555	return (m_pStdoutNotifier != nullptr);
216	capela	94	}
217
218	capela	1558	void Messages::setCaptureEnabled ( bool bCapture )
219	capela	94	{
220	capela	1739	// Flush current buffer.
221			flushStdoutBuffer();
222	capela	94
223	capela	3358	#if !defined(__WIN32__) && !defined(_WIN32) && !defined(WIN32)
224	capela	1465	// Destroy if already enabled.
225			if (!bCapture && m_pStdoutNotifier) {
226			delete m_pStdoutNotifier;
227	capela	3555	m_pStdoutNotifier = nullptr;
228	capela	1465	// Close the notification pipes.
229			if (m_fdStdout[QSAMPLER_MESSAGES_FDREAD] != QSAMPLER_MESSAGES_FDNIL) {
230			::close(m_fdStdout[QSAMPLER_MESSAGES_FDREAD]);
231			m_fdStdout[QSAMPLER_MESSAGES_FDREAD] = QSAMPLER_MESSAGES_FDNIL;
232			}
233			}
234			// Are we going to make up the capture?
235	capela	3555	if (bCapture && m_pStdoutNotifier == nullptr && ::pipe(m_fdStdout) == 0) {
236	capela	1465	::dup2(m_fdStdout[QSAMPLER_MESSAGES_FDWRITE], STDOUT_FILENO);
237			::dup2(m_fdStdout[QSAMPLER_MESSAGES_FDWRITE], STDERR_FILENO);
238			m_pStdoutNotifier = new QSocketNotifier(
239			m_fdStdout[QSAMPLER_MESSAGES_FDREAD], QSocketNotifier::Read, this);
240			QObject::connect(m_pStdoutNotifier,
241			SIGNAL(activated(int)),
242			SLOT(stdoutNotify(int)));
243			}
244	capela	94	#endif
245			}
246
247
248			// Message font accessors.
249	capela	1558	QFont Messages::messagesFont (void)
250	capela	94	{
251	capela	1739	return m_pMessagesTextView->font();
252	capela	94	}
253
254	capela	1738	void Messages::setMessagesFont ( const QFont& font )
255	capela	94	{
256	capela	1739	m_pMessagesTextView->setFont(font);
257	capela	94	}
258
259
260			// Maximum number of message lines accessors.
261	capela	1558	int Messages::messagesLimit (void)
262	capela	94	{
263	capela	1739	return m_iMessagesLimit;
264	capela	94	}
265
266	capela	1558	void Messages::setMessagesLimit ( int iMessagesLimit )
267	capela	94	{
268	capela	1739	m_iMessagesLimit = iMessagesLimit;
269			m_iMessagesHigh = iMessagesLimit + (iMessagesLimit / 3);
270	capela	94	}
271
272	capela	1738	// Messages logging stuff.
273			bool Messages::isLogging (void) const
274			{
275	capela	3555	return (m_pMessagesLog != nullptr);
276	capela	1738	}
277	capela	94
278	capela	1738	void Messages::setLogging ( bool bEnabled, const QString& sFilename )
279	capela	94	{
280	capela	1738	if (m_pMessagesLog) {
281			appendMessages(tr("Logging stopped --- %1 ---")
282			.arg(QDateTime::currentDateTime().toString()));
283			m_pMessagesLog->close();
284			delete m_pMessagesLog;
285	capela	3555	m_pMessagesLog = nullptr;
286	capela	1738	}
287
288			if (bEnabled) {
289			m_pMessagesLog = new QFile(sFilename);
290			if (m_pMessagesLog->open(QIODevice::Text \| QIODevice::Append)) {
291			appendMessages(tr("Logging started --- %1 ---")
292			.arg(QDateTime::currentDateTime().toString()));
293			} else {
294			delete m_pMessagesLog;
295	capela	3555	m_pMessagesLog = nullptr;
296	capela	1738	}
297			}
298	capela	94	}
299
300	capela	1738
301			// Messages log output method.
302			void Messages::appendMessagesLog ( const QString& s )
303	capela	94	{
304	capela	1738	if (m_pMessagesLog) {
305	capela	3788	QTextStream(m_pMessagesLog)
306			<< QTime::currentTime().toString("hh:mm:ss.zzz")
307			<< ' ' << s << endl;
308	capela	1738	m_pMessagesLog->flush();
309			}
310	capela	94	}
311
312	capela	1738	// Messages widget output method.
313			void Messages::appendMessagesLine ( const QString& s )
314	capela	94	{
315	capela	1738	// Check for message line limit...
316			if (m_iMessagesLines > m_iMessagesHigh) {
317			m_pMessagesTextView->setUpdatesEnabled(false);
318			QTextCursor textCursor(m_pMessagesTextView->document()->begin());
319	capela	1465	while (m_iMessagesLines > m_iMessagesLimit) {
320			// Move cursor extending selection
321			// from start to next line-block...
322			textCursor.movePosition(
323			QTextCursor::NextBlock, QTextCursor::KeepAnchor);
324			m_iMessagesLines--;
325			}
326			// Remove the excessive line-blocks...
327			textCursor.removeSelectedText();
328	capela	1738	m_pMessagesTextView->setUpdatesEnabled(true);
329			}
330	capela	1465
331	capela	1738	m_pMessagesTextView->append(s);
332	capela	1465	m_iMessagesLines++;
333	capela	94	}
334
335
336	capela	1738	// The main utility methods.
337			void Messages::appendMessages ( const QString& s )
338			{
339	capela	3788	appendMessagesColor(s, Qt::gray);
340	capela	1738	}
341
342	capela	3788	void Messages::appendMessagesColor ( const QString& s, const QColor& rgb )
343	capela	1738	{
344	capela	3788	appendMessagesLine("<font color=\"" + rgb.name() + "\">" + s + "</font>");
345			appendMessagesLog(s);
346	capela	1738	}
347
348			void Messages::appendMessagesText ( const QString& s )
349			{
350			appendMessagesLine(s);
351			appendMessagesLog(s);
352			}
353
354
355	capela	1465	// History reset.
356	capela	1558	void Messages::clear (void)
357	capela	94	{
358	capela	1465	m_iMessagesLines = 0;
359	capela	1738	m_pMessagesTextView->clear();
360	capela	94	}
361
362	capela	1558	} // namespace QSampler
363	capela	94
364	capela	1558
365	capela	94	// end of qsamplerMessages.cpp