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signal_slots.h
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2008-07-03
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#ifndef K3DSDK_SIGNAL_SLOTS_H
#define K3DSDK_SIGNAL_SLOTS_H
// K-3D
// Copyright (c) 1995-2005, Timothy M. Shead
//
// Contact: tshead@k-3d.com
//
// This program 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.
//
// This program 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 this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
namespace k3d
{
class ihint;
namespace signal
{
template<typename SignalT>
class loop_safe_slot
{
public:
loop_safe_slot(SignalT& Signal) :
signal(Signal),
emitting(false)
{
}
void operator()()
{
if(emitting)
return;
emitting = true;
signal.emit();
emitting = false;
}
void operator()(ihint* const Hint)
{
if(emitting)
return;
emitting = true;
signal.emit(Hint);
emitting = false;
}
private:
SignalT& signal;
bool emitting;
};
template<typename SignalT>
loop_safe_slot<SignalT> make_loop_safe_slot(SignalT& Signal)
{
return loop_safe_slot<SignalT>(Signal);
}
} // namespace signal
} // namespace k3d
#endif // !K3DSDK_SIGNAL_SLOTS_H