stream_redirect.h

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// g2o - General Graph Optimization
// Copyright (C) 2011 R. Kuemmerle, G. Grisetti, W. Burgard
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright notice,
//   this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
//   notice, this list of conditions and the following disclaimer in the
//   documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
// PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
// TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
#ifndef G2O_STREAM_REDIRECT_H
#define G2O_STREAM_REDIRECT_H
 
#include <QMutex>
#include <iostream>
#include <streambuf>
#include <string>
 
#include "g2o_viewer_api.h"
 
class QPlainTextEdit;
 
class G2O_VIEWER_API StreamRedirect : public std::basic_streambuf<char> {
 public:
  typedef std::char_traits<char>::int_type int_type;
 
 public:
  StreamRedirect(std::ostream& stream, QPlainTextEdit* te);
  ~StreamRedirect();
 
 protected:
  virtual std::char_traits<char>::int_type overflow(int_type v);
  virtual std::streamsize xsputn(const char* p, std::streamsize n);
 
 private:
  std::ostream& _stream;
  std::streambuf* _old_buf;
  std::string _buffer;
  QPlainTextEdit* _te;
  QMutex _mutex;
};
 
#endif