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
|
// Copyright (C) 2018 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#ifndef QWASMCOMPOSITOR_H
#define QWASMCOMPOSITOR_H
#include "qwasmwindowstack.h"
#include <QtGui/qregion.h>
#include <qpa/qplatformwindow.h>
#include <QMap>
#include <QtOpenGL/qopengltextureblitter.h>
#include <QtGui/qpalette.h>
#include <QtGui/qpainter.h>
#include <QtGui/qinputdevice.h>
#include <QtCore/private/qstdweb_p.h>
#include <QPointer>
#include <QPointingDevice>
#include <emscripten/html5.h>
#include <emscripten/emscripten.h>
#include <emscripten/bind.h>
QT_BEGIN_NAMESPACE
struct PointerEvent;
class QWasmWindow;
class QWasmScreen;
class QOpenGLContext;
class QOpenGLTexture;
class QWasmEventTranslator;
class QWasmCompositor final : public QObject
{
Q_OBJECT
public:
QWasmCompositor(QWasmScreen *screen);
~QWasmCompositor() final;
void initEventHandlers();
struct QWasmFrameOptions {
QRect rect;
int lineWidth;
QPalette palette;
};
void setEnabled(bool enabled);
void startResize(Qt::Edges edges);
void addWindow(QWasmWindow *window);
void removeWindow(QWasmWindow *window);
void setVisible(QWasmWindow *window, bool visible);
void raise(QWasmWindow *window);
void lower(QWasmWindow *window);
QWindow *windowAt(QPoint globalPoint, int padding = 0) const;
QWindow *keyWindow() const;
QWasmScreen *screen();
QOpenGLContext *context();
enum UpdateRequestDeliveryType { ExposeEventDelivery, UpdateRequestDelivery };
void requestUpdateAllWindows();
void requestUpdateWindow(QWasmWindow *window, UpdateRequestDeliveryType updateType = ExposeEventDelivery);
void setCapture(QWasmWindow *window);
void releaseCapture();
void handleBackingStoreFlush();
private slots:
void frame();
private:
class WindowManipulation {
public:
enum class Operation {
None,
Move,
Resize,
};
WindowManipulation(QWasmScreen* screen);
void onPointerDown(const PointerEvent& event, QWindow* windowAtPoint);
void onPointerMove(const PointerEvent& event);
void onPointerUp(const PointerEvent& event);
void startResize(Qt::Edges edges);
Operation operation() const;
private:
struct ResizeState {
Qt::Edges m_resizeEdges;
QPoint m_originInScreenCoords;
QRect m_initialWindowBounds;
const QPoint m_minShrink;
const QPoint m_maxGrow;
};
struct MoveState {
QPoint m_lastPointInScreenCoords;
};
struct OperationState
{
int pointerId;
QPointer<QWindow> window;
std::variant<ResizeState, MoveState> operationSpecific;
};
struct SystemDragInitData
{
QPoint lastMouseMovePoint;
int lastMousePointerId = -1;
};
void resizeWindow(const QPoint& amount);
ResizeState makeResizeState(Qt::Edges edges, const QPoint &startPoint, QWindow *window);
QWasmScreen *m_screen;
SystemDragInitData m_systemDragInitData;
std::unique_ptr<OperationState> m_state;
};
void onTopWindowChanged();
void deregisterEventHandlers();
void destroy();
void requestUpdate();
void deliverUpdateRequests();
void deliverUpdateRequest(QWasmWindow *window, UpdateRequestDeliveryType updateType);
void drawWindow(QOpenGLTextureBlitter *blitter, QWasmScreen *screen, const QWasmWindow *window);
void drawWindowContent(QOpenGLTextureBlitter *blitter, QWasmScreen *screen,
const QWasmWindow *window);
void blit(QOpenGLTextureBlitter *blitter, QWasmScreen *screen, const QOpenGLTexture *texture, QRect targetGeometry);
void drawWindowDecorations(QOpenGLTextureBlitter *blitter, QWasmScreen *screen,
const QWasmWindow *window);
void drawFrameWindow(QWasmFrameOptions options, QPainter *painter);
static int keyboard_cb(int eventType, const EmscriptenKeyboardEvent *keyEvent, void *userData);
static int focus_cb(int eventType, const EmscriptenFocusEvent *focusEvent, void *userData);
static int wheel_cb(int eventType, const EmscriptenWheelEvent *wheelEvent, void *userData);
bool processPointer(const PointerEvent& event);
bool deliverEventToTarget(const PointerEvent& event, QWindow *eventTarget);
static int touchCallback(int eventType, const EmscriptenTouchEvent *ev, void *userData);
bool processKeyboard(int eventType, const EmscriptenKeyboardEvent *keyEvent);
bool processWheel(int eventType, const EmscriptenWheelEvent *wheelEvent);
bool processMouseEnter(const EmscriptenMouseEvent *mouseEvent);
bool processMouseLeave();
bool processTouch(int eventType, const EmscriptenTouchEvent *touchEvent);
void enterWindow(QWindow *window, const QPoint &localPoint, const QPoint &globalPoint);
void leaveWindow(QWindow *window);
WindowManipulation m_windowManipulation;
QWasmWasmWindowStack m_windowStack;
QScopedPointer<QOpenGLContext> m_context;
QScopedPointer<QOpenGLTextureBlitter> m_blitter;
QHash<const QWasmWindow *, bool> m_windowVisibility;
bool m_isEnabled = true;
QSize m_targetSize;
qreal m_targetDevicePixelRatio = 1;
QMap<QWasmWindow *, UpdateRequestDeliveryType> m_requestUpdateWindows;
bool m_requestUpdateAllWindows = false;
int m_requestAnimationFrameId = -1;
bool m_inDeliverUpdateRequest = false;
QPointer<QWindow> m_pressedWindow;
QPointer<QWindow> m_lastMouseTargetWindow;
QPointer<QWindow> m_mouseCaptureWindow;
std::unique_ptr<qstdweb::EventCallback> m_pointerDownCallback;
std::unique_ptr<qstdweb::EventCallback> m_pointerMoveCallback;
std::unique_ptr<qstdweb::EventCallback> m_pointerUpCallback;
std::unique_ptr<qstdweb::EventCallback> m_pointerLeaveCallback;
std::unique_ptr<qstdweb::EventCallback> m_pointerEnterCallback;
std::unique_ptr<QPointingDevice> m_touchDevice;
QMap <int, QPointF> m_pressedTouchIds;
bool m_isResizeCursorDisplayed = false;
std::unique_ptr<QWasmEventTranslator> m_eventTranslator;
bool m_mouseInCanvas = false;
QPointer<QWindow> m_windowUnderMouse;
};
QT_END_NAMESPACE
#endif
|
