1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
// Copyright 2012 The Chromium Authors
// 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_
|
