daq::QTUtils::QDebugStream Class Reference

#include <qdebugstream.hpp>

Inheritance diagram for daq::QTUtils::QDebugStream:

Collaboration diagram for daq::QTUtils::QDebugStream:

Public Member Functions
	QDebugStream (std::ostream &stream, QTextEdit *text_edit)
	~QDebugStream ()

Protected Member Functions
virtual int_type	overflow (int_type v)
virtual std::streamsize	xsputn (const char *p, std::streamsize n)
virtual bool	event (QEvent *event)

Private Attributes
std::ostream &	m_stream
std::streambuf *	m_old_buf
std::string	m_string
QTextEdit *	log_window
QMutex *	m_mutex
QString	m_text

Detailed Description

Redirects a std::ostream (such as cout or cerr) to a text edit. In order to reset the stream simply delete the QDebugStream object.
Usage:

qout = new QDebugStream(std::cout, myTextEdit); //everything written to std::cout is appended to the text edit
...
delete qout; //resets the streamoutput

Definition at line 27 of file qdebugstream.hpp.

Constructor & Destructor Documentation

QDebugStream()

daq::QTUtils::QDebugStream::QDebugStream ( std::ostream & stream, QTextEdit * text_edit )

inline

Definition at line 35 of file qdebugstream.hpp.

    : m_stream(stream)
  {
    m_mutex = new QMutex();
    log_window = text_edit;
    m_old_buf = stream.rdbuf();
    stream.rdbuf(this);
  }

~QDebugStream()

daq::QTUtils::QDebugStream::~QDebugStream ( )

inline

Definition at line 43 of file qdebugstream.hpp.

  {
    // output anything that is left
    if (!m_string.empty())
      log_window->append(m_string.c_str());
 
    m_stream.rdbuf(m_old_buf);
    delete m_mutex;
  }

Member Function Documentation

event()

bool QDebugStream::event ( QEvent * event )

protectedvirtual

Definition at line 23 of file qdebugstream.cpp.

{
  if (event->type() == QEvent::User) {
    {
      QMutexLocker locker(m_mutex);
      if (!m_text.isEmpty())
        log_window->append(m_text);
      m_text.clear();
    }
    event->accept();
    return true;
  }
  return false;
}

overflow()

std::streambuf::int_type QDebugStream::overflow ( int_type v )

protectedvirtual

Definition at line 39 of file qdebugstream.cpp.

{
  QMutexLocker locker(m_mutex);
  if (v == '\n') {
    m_text.append(m_string.c_str()).append("\n");
    m_string.erase(m_string.begin(), m_string.end());
  } else {
    m_string += v;
  }
  QCoreApplication::postEvent(this, new QEvent(QEvent::User));
  return v;
}

xsputn()

std::streamsize QDebugStream::xsputn ( const char * p, std::streamsize n )

protectedvirtual

Definition at line 5 of file qdebugstream.cpp.

{
  QMutexLocker locker(m_mutex);
  m_string.append(p, p + n);
 
  uint pos = 0;
  while (pos != std::string::npos) {
    pos = m_string.find('\n');
    if (pos != std::string::npos) {
      std::string tmp(m_string.begin(), m_string.begin() + pos);
      m_text.append(tmp.c_str()).append("\n");
      m_string.erase(m_string.begin(), m_string.begin() + pos + 1);
    }
  }
  QCoreApplication::postEvent(this, new QEvent(QEvent::User));
  return n;
}

Member Data Documentation

log_window

QTextEdit* daq::QTUtils::QDebugStream::log_window

private

Definition at line 62 of file qdebugstream.hpp.

m_mutex

QMutex* daq::QTUtils::QDebugStream::m_mutex

private

Definition at line 63 of file qdebugstream.hpp.

m_old_buf

std::streambuf* daq::QTUtils::QDebugStream::m_old_buf

private

Definition at line 60 of file qdebugstream.hpp.

m_stream

std::ostream& daq::QTUtils::QDebugStream::m_stream

private

Definition at line 59 of file qdebugstream.hpp.

m_string

std::string daq::QTUtils::QDebugStream::m_string

private

Definition at line 61 of file qdebugstream.hpp.

m_text

QString daq::QTUtils::QDebugStream::m_text

private

Definition at line 64 of file qdebugstream.hpp.

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The documentation for this class was generated from the following files:

• /github/workspace/dunedaq/sourcecode/dbe/include/dbe/qdebugstream.hpp
• /github/workspace/dunedaq/sourcecode/dbe/src/qtutils/qdebugstream.cpp