| // 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), tilt_(PP_MakeFloatPoint(0, 0)) {} |
| |
| TouchPoint(const PP_TouchPoint& point, const PP_FloatPoint& tilt) |
| : touch_point_(point), tilt_(tilt) {} |
| |
| /// @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; } |
| |
| /// @return The tilt of this touchpoint. This is a float point. Values of x |
| /// and y are between 0 and 90, with 0 indicating 0 degrees and 90 indicating |
| // 90 degrees. |
| PP_FloatPoint tilt() const { return tilt_; } |
| |
| private: |
| PP_TouchPoint touch_point_; |
| PP_FloatPoint tilt_; |
| }; |
| |
| } // namespace pp |
| |
| #endif // PPAPI_CPP_TOUCH_POINT_H_ |