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Diffstat (limited to 'src/lib/change_signaller.h')
| -rw-r--r-- | src/lib/change_signaller.h | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/src/lib/change_signaller.h b/src/lib/change_signaller.h new file mode 100644 index 000000000..ec1f14ea3 --- /dev/null +++ b/src/lib/change_signaller.h @@ -0,0 +1,58 @@ +/* + Copyright (C) 2018 Carl Hetherington <cth@carlh.net> + + This file is part of DCP-o-matic. + + DCP-o-matic 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. + + DCP-o-matic 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 DCP-o-matic. If not, see <http://www.gnu.org/licenses/>. + +*/ + +#ifndef DCPOMATIC_CHANGE_H +#define DCPOMATIC_CHANGE_H + +#include <boost/noncopyable.hpp> + +template <class T> +class ChangeSignaller : public boost::noncopyable +{ +public: + ChangeSignaller (T* t, int p) + : _thing (t) + , _property (p) + , _done (true) + { + _thing->signal_change (CHANGE_TYPE_PENDING, _property); + } + + ~ChangeSignaller () + { + if (_done) { + _thing->signal_change (CHANGE_TYPE_DONE, _property); + } else { + _thing->signal_change (CHANGE_TYPE_CANCELLED, _property); + } + } + + void abort () + { + _done = false; + } + +private: + T* _thing; + int _property; + bool _done; +}; + +#endif |