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
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
|
// Copyright (C) 2022 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#ifndef QWASMEVENT_H
#define QWASMEVENT_H
#include "qwasmplatform.h"
#include "qwasmdom.h"
#include <QtCore/qglobal.h>
#include <QtCore/qnamespace.h>
#include <QtGui/qevent.h>
#include <private/qstdweb_p.h>
#include <QPoint>
#include <emscripten/html5.h>
#include <emscripten/val.h>
QT_BEGIN_NAMESPACE
class QWasmDeadKeySupport;
class QWindow;
enum class EventType {
DragEnd,
DragOver,
DragStart,
Drop,
KeyDown,
KeyUp,
PointerDown,
PointerMove,
PointerUp,
PointerEnter,
PointerLeave,
PointerCancel,
Wheel,
};
enum class PointerType {
Mouse,
Touch,
Pen,
Other,
};
enum class WindowArea {
NonClient,
Client,
};
enum class DeltaMode { Pixel, Line, Page };
namespace KeyboardModifier {
namespace internal
{
// Check for the existence of shiftKey, ctrlKey, altKey and metaKey in a type.
// Based on that, we can safely assume we are dealing with an emscripten event type.
template<typename T>
struct IsEmscriptenEvent
{
template<typename U, EM_BOOL U::*, EM_BOOL U::*, EM_BOOL U::*, EM_BOOL U::*>
struct SFINAE {};
template<typename U> static char Test(
SFINAE<U, &U::shiftKey, &U::ctrlKey, &U::altKey, &U::metaKey>*);
template<typename U> static int Test(...);
static const bool value = sizeof(Test<T>(0)) == sizeof(char);
};
template<class T, typename Enable = void>
struct Helper;
template<class T>
struct Helper<T, std::enable_if_t<IsEmscriptenEvent<T>::value>>
{
static QFlags<Qt::KeyboardModifier> getModifierForEvent(const T& event) {
QFlags<Qt::KeyboardModifier> keyModifier = Qt::NoModifier;
if (event.shiftKey)
keyModifier |= Qt::ShiftModifier;
if (event.ctrlKey)
keyModifier |= platform() == Platform::MacOS ? Qt::MetaModifier : Qt::ControlModifier;
if (event.altKey)
keyModifier |= Qt::AltModifier;
if (event.metaKey)
keyModifier |= platform() == Platform::MacOS ? Qt::ControlModifier : Qt::MetaModifier;
return keyModifier;
}
};
template<>
struct Helper<emscripten::val>
{
static QFlags<Qt::KeyboardModifier> getModifierForEvent(const emscripten::val& event) {
QFlags<Qt::KeyboardModifier> keyModifier = Qt::NoModifier;
if (event["shiftKey"].as<bool>())
keyModifier |= Qt::ShiftModifier;
if (event["ctrlKey"].as<bool>())
keyModifier |= platform() == Platform::MacOS ? Qt::MetaModifier : Qt::ControlModifier;
if (event["altKey"].as<bool>())
keyModifier |= Qt::AltModifier;
if (event["metaKey"].as<bool>())
keyModifier |= platform() == Platform::MacOS ? Qt::ControlModifier : Qt::MetaModifier;
if (event["constructor"]["name"].as<std::string>() == "KeyboardEvent" &&
event["location"].as<unsigned int>() == DOM_KEY_LOCATION_NUMPAD) {
keyModifier |= Qt::KeypadModifier;
}
return keyModifier;
}
};
} // namespace internal
template <typename Event>
QFlags<Qt::KeyboardModifier> getForEvent(const Event& event)
{
return internal::Helper<Event>::getModifierForEvent(event);
}
template <>
QFlags<Qt::KeyboardModifier> getForEvent<EmscriptenKeyboardEvent>(
const EmscriptenKeyboardEvent& event);
} // namespace KeyboardModifier
struct Event
{
Event(EventType type, emscripten::val webEvent);
~Event();
Event(const Event &other);
Event(Event &&other);
Event &operator=(const Event &other);
Event &operator=(Event &&other);
emscripten::val webEvent;
EventType type;
emscripten::val target() const { return webEvent["target"]; }
};
struct KeyEvent : public Event
{
static std::optional<KeyEvent>
fromWebWithDeadKeyTranslation(emscripten::val webEvent, QWasmDeadKeySupport *deadKeySupport);
KeyEvent(EventType type, emscripten::val webEvent);
~KeyEvent();
KeyEvent(const KeyEvent &other);
KeyEvent(KeyEvent &&other);
KeyEvent &operator=(const KeyEvent &other);
KeyEvent &operator=(KeyEvent &&other);
Qt::Key key;
QFlags<Qt::KeyboardModifier> modifiers;
bool deadKey;
QString text;
};
struct MouseEvent : public Event
{
MouseEvent(EventType type, emscripten::val webEvent);
~MouseEvent();
MouseEvent(const MouseEvent &other);
MouseEvent(MouseEvent &&other);
MouseEvent &operator=(const MouseEvent &other);
MouseEvent &operator=(MouseEvent &&other);
static constexpr Qt::MouseButton buttonFromWeb(int webButton) {
switch (webButton) {
case 0:
return Qt::LeftButton;
case 1:
return Qt::MiddleButton;
case 2:
return Qt::RightButton;
default:
return Qt::NoButton;
}
}
static constexpr Qt::MouseButtons buttonsFromWeb(unsigned short webButtons) {
// Coincidentally, Qt and web bitfields match.
return Qt::MouseButtons::fromInt(webButtons);
}
static constexpr QEvent::Type mouseEventTypeFromEventType(
EventType eventType, WindowArea windowArea) {
switch (eventType) {
case EventType::PointerDown :
return windowArea == WindowArea::Client ?
QEvent::MouseButtonPress : QEvent::NonClientAreaMouseButtonPress;
case EventType::PointerUp :
return windowArea == WindowArea::Client ?
QEvent::MouseButtonRelease : QEvent::NonClientAreaMouseButtonRelease;
case EventType::PointerMove :
return windowArea == WindowArea::Client ?
QEvent::MouseMove : QEvent::NonClientAreaMouseMove;
default:
return QEvent::None;
}
}
QPointF localPoint;
QPointF pointInPage;
QPointF pointInViewport;
Qt::MouseButton mouseButton;
Qt::MouseButtons mouseButtons;
QFlags<Qt::KeyboardModifier> modifiers;
};
struct PointerEvent : public MouseEvent
{
static std::optional<PointerEvent> fromWeb(emscripten::val webEvent);
PointerEvent(EventType type, emscripten::val webEvent);
~PointerEvent();
PointerEvent(const PointerEvent &other);
PointerEvent(PointerEvent &&other);
PointerEvent &operator=(const PointerEvent &other);
PointerEvent &operator=(PointerEvent &&other);
PointerType pointerType;
int pointerId;
qreal pressure;
qreal tiltX;
qreal tiltY;
qreal tangentialPressure;
qreal twist;
qreal width;
qreal height;
bool isPrimary;
};
struct DragEvent : public MouseEvent
{
static std::optional<DragEvent> fromWeb(emscripten::val webEvent, QWindow *targetQWindow);
DragEvent(EventType type, emscripten::val webEvent, QWindow *targetQWindow);
~DragEvent();
DragEvent(const DragEvent &other);
DragEvent(DragEvent &&other);
DragEvent &operator=(const DragEvent &other);
DragEvent &operator=(DragEvent &&other);
void cancelDragStart();
void acceptDragOver();
void acceptDrop();
Qt::DropAction dropAction;
dom::DataTransfer dataTransfer;
QWindow *targetWindow;
};
struct WheelEvent : public MouseEvent
{
static std::optional<WheelEvent> fromWeb(emscripten::val webEvent);
WheelEvent(EventType type, emscripten::val webEvent);
~WheelEvent();
WheelEvent(const WheelEvent &other);
WheelEvent(WheelEvent &&other);
WheelEvent &operator=(const WheelEvent &other);
WheelEvent &operator=(WheelEvent &&other);
DeltaMode deltaMode;
bool webkitDirectionInvertedFromDevice;
QPointF delta;
};
QT_END_NAMESPACE
#endif // QWASMEVENT_H
|
