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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef PPAPI_CPP_TOUCH_POINT_H_
#define PPAPI_CPP_TOUCH_POINT_H_
#include <stdint.h>
#include "ppapi/c/ppb_input_event.h"
#include "ppapi/cpp/input_event.h"
#include "ppapi/cpp/point.h"
namespace pp {
/// Wrapper class for PP_TouchPoint.
class TouchPoint {
public:
TouchPoint() : touch_point_(PP_MakeTouchPoint()) {}
TouchPoint(const PP_TouchPoint& point) : touch_point_(point) {}
/// @return The identifier for this TouchPoint. This corresponds to the order
/// in which the points were pressed. For example, the first point to be
/// pressed has an id of 0, the second has an id of 1, and so on. An id can be
/// reused when a touch point is released. For example, if two fingers are
/// down, with id 0 and 1, and finger 0 releases, the next finger to be
/// pressed can be assigned to id 0.
uint32_t id() const { return touch_point_.id; }
/// @return The x-y coordinates of this TouchPoint, in DOM coordinate space.
FloatPoint position() const {
return pp::FloatPoint(touch_point_.position);
}
/// @return The elliptical radii, in screen pixels, in the x and y direction
/// of this TouchPoint.
FloatPoint radii() const { return pp::FloatPoint(touch_point_.radius); }
/// @return The angle of rotation of the elliptical model of this TouchPoint
/// from the y-axis.
float rotation_angle() const { return touch_point_.rotation_angle; }
/// @return The pressure applied to this TouchPoint. This is typically a
/// value between 0 and 1, with 0 indicating no pressure and 1 indicating
/// some maximum pressure, but scaling differs depending on the hardware and
/// the value is not guaranteed to stay within that range.
float pressure() const { return touch_point_.pressure; }
private:
PP_TouchPoint touch_point_;
};
} // namespace pp
#endif /* PPAPI_CPP_TOUCH_POINT_H_ */
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