/usr/include/Nux-4.0/Nux/KineticScrollingTickSource.h is in libnux-4.0-dev 4.0.8+16.04.20160209-0ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (C) 2012 - Canonical Ltd.
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License, as
* published by the Free Software Foundation; either version 2.1 or 3.0
* of the License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranties of
* MERCHANTABILITY, SATISFACTORY QUALITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the applicable version of the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of both the GNU Lesser General Public
* License along with this program. If not, see <http://www.gnu.org/licenses/>
*
* Authored by: Daniel d'Andrada <daniel.dandrada@canonical.com>
*/
#ifndef NUX_KS_TICK_SOURCE_H
#define NUX_KS_TICK_SOURCE_H
#include <stdint.h>
#include <Nux/TimerProc.h>
/*****
* OBS: Would be good have animation::TickSource used instead of this,
* but that's not posssible at the moment.
****/
namespace nux
{
namespace kinetic_scrolling
{
/*!
A class that emits a signal at constant intervals.
*/
class TickSourceInterface
{
public:
virtual ~TickSourceInterface() {}
virtual void Start() = 0;
virtual void Stop() = 0;
/*!
Emitted at a constant frequency.
Its parameter is the time elapsed since the previous tick or, if this is
the very first tick, since the tick source was started, in milliseconds.
*/
sigc::signal<void, int> tick;
};
/*!
A TickSource implemented using nux::TimerHandler
It's way more convenient and testable to use this than nux::TimerHandler
if all you want is something that calls you at regular intervals.
*/
class TimerTickSource : public TickSourceInterface
{
public:
TimerTickSource();
virtual ~TimerTickSource();
virtual void Start();
virtual void Stop();
private:
/* update period in milliseconds */
static const int UPDATE_PERIOD = 16 /* 60 fps */;
void Tick(void*);
void TimerExpired(void*);
TimerHandle timer_handle_;
TimerFunctor timer_functor_;
int64_t last_elapsed_time_;
};
} // namespace kinetic_scrolling
} // namespace nux
#endif // NUX_KS_TICK_SOURCE_H
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