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
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
|
/*
* Copyright (C) 2001 Peter Kelly (pmk@post.com)
* Copyright (C) 2001 Tobias Anton (anton@stud.fbi.fh-darmstadt.de)
* Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
* Copyright (C) 2003, 2004, 2005, 2006, 2008, 2010 Apple Inc. All rights
* reserved.
* Copyright (C) 2013 Samsung Electronics. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_EVENTS_WHEEL_EVENT_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_EVENTS_WHEEL_EVENT_H_
#include "third_party/blink/public/common/input/web_mouse_wheel_event.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/events/mouse_event.h"
#include "third_party/blink/renderer/platform/wtf/casting.h"
#include "ui/gfx/geometry/point_f.h"
namespace blink {
class WheelEventInit;
class CORE_EXPORT WheelEvent final : public MouseEvent {
DEFINE_WRAPPERTYPEINFO();
public:
constexpr static int kTickMultiplier = 120;
enum DeltaMode { kDomDeltaPixel = 0, kDomDeltaLine, kDomDeltaPage };
static WheelEvent* Create() { return MakeGarbageCollected<WheelEvent>(); }
static WheelEvent* Create(const WebMouseWheelEvent& native_event,
LocalDOMWindow& window);
static WheelEvent* Create(const WebMouseWheelEvent& native_event,
const gfx::Vector2dF& delta_in_pixels,
LocalDOMWindow& window);
static WheelEvent* Create(const AtomicString& type,
const WheelEventInit* initializer) {
return MakeGarbageCollected<WheelEvent>(type, initializer);
}
WheelEvent();
WheelEvent(const AtomicString&, const WheelEventInit*);
WheelEvent(const WebMouseWheelEvent&, LocalDOMWindow& window);
WheelEvent(const WebMouseWheelEvent&,
const gfx::Vector2dF& delta_in_pixels,
LocalDOMWindow& window);
double deltaX() const { return delta_x_; } // Positive when scrolling right.
double deltaY() const { return delta_y_; } // Positive when scrolling down.
double deltaZ() const { return delta_z_; }
int wheelDelta() const {
return wheelDeltaY() ? wheelDeltaY() : wheelDeltaX();
} // Deprecated.
int wheelDeltaX() const {
return wheel_delta_.x();
} // Deprecated, negative when scrolling right.
int wheelDeltaY() const {
return wheel_delta_.y();
} // Deprecated, negative when scrolling down.
unsigned deltaMode() const { return delta_mode_; }
const AtomicString& InterfaceName() const override;
bool IsMouseEvent() const override;
bool IsWheelEvent() const override;
void preventDefault() override;
const WebMouseWheelEvent& NativeEvent() const { return native_event_; }
// WheelEvent doesn't modify the event path, but its parent MouseEvent does.
// So we need to override its parent's DispatchEvent.
DispatchEventResult DispatchEvent(EventDispatcher&) override;
void Trace(Visitor*) const override;
private:
gfx::Point wheel_delta_;
double delta_x_;
double delta_y_;
double delta_z_;
unsigned delta_mode_;
WebMouseWheelEvent native_event_;
};
template <>
struct DowncastTraits<WheelEvent> {
static bool AllowFrom(const Event& event) { return event.IsWheelEvent(); }
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_EVENTS_WHEEL_EVENT_H_
|
