StreamRedirect Class Reference

redirect a stream to a QPlainTextEdit More...

#include <stream_redirect.h>

Inheritance diagram for StreamRedirect:

Collaboration diagram for StreamRedirect:

Public Types
typedef std::char_traits< char >::int_type	int_type

Public Member Functions
	StreamRedirect (std::ostream &stream, QPlainTextEdit *te)
	~StreamRedirect ()

Protected Member Functions
virtual std::char_traits< char >::int_type	overflow (int_type v)
virtual std::streamsize	xsputn (const char *p, std::streamsize n)

Private Attributes
std::ostream &	_stream
std::streambuf *	_old_buf
std::string	_buffer
QPlainTextEdit *	_te
QMutex	_mutex

Detailed Description

redirect a stream to a QPlainTextEdit

Definition at line 32 of file stream_redirect.h.

Member Typedef Documentation

typedef std::char_traits<char>::int_type StreamRedirect::int_type

Definition at line 35 of file stream_redirect.h.

Constructor & Destructor Documentation

StreamRedirect::StreamRedirect	(	std::ostream &	stream,
		QPlainTextEdit *	te
	)

Definition at line 25 of file stream_redirect.cpp.

References _old_buf, and _stream.

                                                                    :
  _stream(stream), _te(te)
{
  _old_buf = stream.rdbuf();
  _stream.rdbuf(this);
}

StreamRedirect::~StreamRedirect

(

)

Definition at line 32 of file stream_redirect.cpp.

References _buffer, _old_buf, _stream, and xsputn().

{
  if (!_buffer.empty())
    xsputn(_buffer.c_str(), _buffer.size());
  _stream.rdbuf(_old_buf);
}

Member Function Documentation

std::char_traits< char >::int_type StreamRedirect::overflow ( int_type  v )

protectedvirtual

Definition at line 39 of file stream_redirect.cpp.

References _buffer, _mutex, and _te.

{
  _mutex.lock();
  if (v == '\n') {
    _te->appendPlainText(QString::fromLatin1(_buffer.c_str(), _buffer.size()));
    _buffer.clear();
  }
  else
    _buffer.push_back(v);

  _mutex.unlock();
  return v;
}

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

protectedvirtual

Definition at line 53 of file stream_redirect.cpp.

References _buffer, _mutex, and _te.

Referenced by ~StreamRedirect().

{
  _mutex.lock();
  _buffer.append(p, p + n);

  std::string::size_type pos = 0;
  while (1) {
    pos = _buffer.find('\n');
    if (pos != std::string::npos) {
      _te->appendPlainText(QString::fromLatin1(_buffer.c_str(), pos));
      _buffer.erase(_buffer.begin(), _buffer.begin() + pos + 1);
    } else
      break;
  }

  _mutex.unlock();
  return n;
}

Member Data Documentation

std::string StreamRedirect::_buffer

private

Definition at line 48 of file stream_redirect.h.

Referenced by overflow(), xsputn(), and ~StreamRedirect().

QMutex StreamRedirect::_mutex

private

Definition at line 50 of file stream_redirect.h.

Referenced by overflow(), and xsputn().

std::streambuf* StreamRedirect::_old_buf

private

Definition at line 47 of file stream_redirect.h.

Referenced by StreamRedirect(), and ~StreamRedirect().

std::ostream& StreamRedirect::_stream

private

Definition at line 46 of file stream_redirect.h.

Referenced by StreamRedirect(), and ~StreamRedirect().

QPlainTextEdit* StreamRedirect::_te

private

Definition at line 49 of file stream_redirect.h.

Referenced by overflow(), and xsputn().

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

• /home/xuezhisd/CLionProjects/g2o/g2o/apps/g2o_viewer/stream_redirect.h
• /home/xuezhisd/CLionProjects/g2o/g2o/apps/g2o_viewer/stream_redirect.cpp