/usr/include/mirserver/mir/input/touch_visualizer.h is in libmirserver-dev 0.26.3+16.04.20170605-0ubuntu1.1.
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* Copyright © 2014 Canonical Ltd.
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 3,
* as published by the Free Software Foundation.
*
* 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, see <http://www.gnu.org/licenses/>.
*
* Authored by: Robert Carr <robert.carr@canonical.com>
*/
#ifndef MIR_INPUT_TOUCH_VISUALIZER_H_
#define MIR_INPUT_TOUCH_VISUALIZER_H_
#include "mir/geometry/point.h"
#include <vector>
namespace mir
{
namespace input
{
/// An interface for listening to a low level stream of touches, in order to provide
// a "spot" style visualization.
class TouchVisualizer
{
public:
virtual ~TouchVisualizer() = default;
struct Spot
{
geometry::Point touch_location;
// If pressure is zero, the touch-point can be interpreted as a hover.
float pressure;
};
// Toggle visualization of touches
virtual void enable() = 0;
virtual void disable() = 0;
// Visualize a given set of touches statelessly.
virtual void visualize_touches(std::vector<Spot> const& touches) = 0;
protected:
TouchVisualizer() = default;
TouchVisualizer(const TouchVisualizer&) = delete;
TouchVisualizer& operator=(const TouchVisualizer&) = delete;
};
inline bool operator==(TouchVisualizer::Spot const &lhs, TouchVisualizer::Spot const& rhs)
{
return lhs.touch_location == rhs.touch_location &&
lhs.pressure == rhs.pressure;
}
}
}
#endif // MIR_INPUT_TOUCH_VISUALIZER_H_
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