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f1f7718282
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@21876 a592a061-630c-0410-9148-cb99ea01b6c8
78 lines
1.7 KiB
C++
78 lines
1.7 KiB
C++
// -*- C++ -*-
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/**
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* \file FileMonitor.h
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* This file is part of LyX, the document processor.
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* Licence details can be found in the file COPYING.
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*
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* \author Angus Leeming
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*
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* Full author contact details are available in file CREDITS.
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*
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* FileMonitor monitors a file and informs a listener when that file has
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* changed.
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*/
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#ifndef FILEMONITOR_H
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#define FILEMONITOR_H
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#include <boost/signal.hpp>
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namespace lyx {
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namespace support {
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class FileName;
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class FileMonitor
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{
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public:
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/** Once monitoring begins, the file will be monitored every
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* interval ms.
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*
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* FIXME: rewrite and simplify using an encapsulation of QFileSystemWatcher.
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*/
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FileMonitor(FileName const & file_with_path, int interval);
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/// Destructor
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~FileMonitor();
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///
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void reset(FileName const & file_with_path) const;
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///
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FileName const & filename() const;
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/// Begin monitoring the file
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void start() const;
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///
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void stop() const;
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///
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bool monitoring() const;
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/** The checksum is recomputed whenever the file is modified.
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* If the file is not being monitored, then the checksum will be
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* recomputed each time this function is called.
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*/
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unsigned long checksum() const;
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/// Connect and you'll be informed when the file has changed.
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typedef boost::signal<void()> FileChangedSig;
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typedef FileChangedSig::slot_type slot_type;
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///
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boost::signals::connection connect(slot_type const &) const;
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private:
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/// noncopyable
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FileMonitor(FileMonitor const &);
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void operator=(FileMonitor const &);
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/// Use the Pimpl idiom to hide the internals.
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class Impl;
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/// The pointer never changes although *pimpl_'s contents may.
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Impl * const pimpl_;
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};
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} // namespace support
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} // namespace lyx
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#endif // FILEMONITOR_H
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