1// Copyright (C) 2016 The Qt Company Ltd.
2// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
3
4#include "qwaylandtouch_p.h"
5#include "qwaylandinputdevice_p.h"
6#include "qwaylanddisplay_p.h"
7#include "qwaylandsurface_p.h"
8
9#include <QtGui/QPointingDevice>
10
11QT_BEGIN_NAMESPACE
12
13namespace QtWaylandClient {
14
15QWaylandTouchExtension::QWaylandTouchExtension(QWaylandDisplay *display, uint32_t id)
16 : QtWayland::qt_touch_extension(display->wl_registry(), id, 1),
17 mDisplay(display),
18 mTouchDevice(nullptr),
19 mPointsLeft(0),
20 mFlags(0),
21 mMouseSourceId(-1),
22 mInputDevice(nullptr)
23{
24}
25
26QWaylandTouchExtension::~QWaylandTouchExtension()
27{
28 qt_touch_extension_destroy(object());
29}
30
31void QWaylandTouchExtension::registerDevice(int caps)
32{
33 // TODO number of touchpoints, actual name and ID
34 mTouchDevice = new QPointingDevice(QLatin1String("some touchscreen"), 0,
35 QInputDevice::DeviceType::TouchScreen, QPointingDevice::PointerType::Finger,
36 QInputDevice::Capabilities(caps), 10, 0);
37 QWindowSystemInterface::registerInputDevice(device: mTouchDevice);
38}
39
40static inline qreal fromFixed(int f)
41{
42 return f / qreal(10000);
43}
44
45void QWaylandTouchExtension::touch_extension_touch(uint32_t time,
46 uint32_t id, uint32_t state, int32_t x, int32_t y,
47 int32_t normalized_x, int32_t normalized_y,
48 int32_t width, int32_t height, uint32_t pressure,
49 int32_t velocity_x, int32_t velocity_y,
50 uint32_t flags, wl_array *rawdata)
51{
52 if (!mInputDevice) {
53 QList<QWaylandInputDevice *> inputDevices = mDisplay->inputDevices();
54 if (inputDevices.isEmpty()) {
55 qWarning(msg: "qt_touch_extension: handle_touch: No input devices");
56 return;
57 }
58 mInputDevice = inputDevices.first();
59 }
60 QWaylandWindow *win = mInputDevice->touchFocus();
61 if (!win)
62 win = mInputDevice->pointerFocus();
63 if (!win)
64 win = mInputDevice->keyboardFocus();
65 if (!win || !win->window()) {
66 qWarning(msg: "qt_touch_extension: handle_touch: No pointer focus");
67 return;
68 }
69 mTargetWindow = win->window();
70
71 QWindowSystemInterface::TouchPoint tp;
72 tp.id = id;
73 tp.state = QEventPoint::State(int(state & 0xFFFF));
74 int sentPointCount = state >> 16;
75 if (!mPointsLeft) {
76 Q_ASSERT(sentPointCount > 0);
77 mPointsLeft = sentPointCount;
78 }
79
80 if (!mTouchDevice)
81 registerDevice(caps: flags >> 16);
82
83 tp.area = QRectF(0, 0, fromFixed(f: width), fromFixed(f: height));
84 // Got surface-relative coords but need a (virtual) screen position.
85 QPointF relPos = QPointF(fromFixed(f: x), fromFixed(f: y));
86 QPointF delta = relPos - relPos.toPoint();
87 tp.area.moveCenter(p: mTargetWindow->mapToGlobal(pos: relPos.toPoint()) + delta);
88
89 tp.normalPosition.setX(fromFixed(f: normalized_x));
90 tp.normalPosition.setY(fromFixed(f: normalized_y));
91 tp.pressure = pressure / 255.0;
92 tp.velocity.setX(fromFixed(f: velocity_x));
93 tp.velocity.setY(fromFixed(f: velocity_y));
94
95 if (rawdata) {
96 const int rawPosCount = rawdata->size / sizeof(float) / 2;
97 float *p = static_cast<float *>(rawdata->data);
98 for (int i = 0; i < rawPosCount; ++i) {
99 float x = *p++;
100 float y = *p++;
101 tp.rawPositions.append(t: QPointF(x, y));
102 }
103 }
104
105 mTouchPoints.append(t: tp);
106 mTimestamp = time;
107
108 if (!--mPointsLeft)
109 sendTouchEvent();
110}
111
112void QWaylandTouchExtension::sendTouchEvent()
113{
114 // Copy all points, that are in the previous but not in the current list, as stationary.
115 for (int i = 0; i < mPrevTouchPoints.size(); ++i) {
116 const QWindowSystemInterface::TouchPoint &prevPoint(mPrevTouchPoints.at(i));
117 if (prevPoint.state == QEventPoint::Released)
118 continue;
119 bool found = false;
120 for (int j = 0; j < mTouchPoints.size(); ++j)
121 if (mTouchPoints.at(i: j).id == prevPoint.id) {
122 found = true;
123 break;
124 }
125 if (!found) {
126 QWindowSystemInterface::TouchPoint p = prevPoint;
127 p.state = QEventPoint::Stationary;
128 mTouchPoints.append(t: p);
129 }
130 }
131
132 if (mTouchPoints.isEmpty()) {
133 mPrevTouchPoints.clear();
134 return;
135 }
136
137 QWindowSystemInterface::handleTouchEvent(window: mTargetWindow, timestamp: mTimestamp, device: mTouchDevice, points: mTouchPoints);
138
139 QEventPoint::States states = {};
140 for (int i = 0; i < mTouchPoints.size(); ++i)
141 states |= mTouchPoints.at(i).state;
142
143 if (mFlags & QT_TOUCH_EXTENSION_FLAGS_MOUSE_FROM_TOUCH) {
144 const bool firstPress = states == QEventPoint::Pressed;
145 if (firstPress)
146 mMouseSourceId = mTouchPoints.first().id;
147 for (int i = 0; i < mTouchPoints.size(); ++i) {
148 const QWindowSystemInterface::TouchPoint &tp(mTouchPoints.at(i));
149 if (tp.id == mMouseSourceId) {
150 const bool released = tp.state == QEventPoint::Released;
151 Qt::MouseButtons buttons = released ? Qt::NoButton : Qt::LeftButton;
152 QEvent::Type eventType = firstPress ? QEvent::MouseButtonPress
153 : released ? QEvent::MouseButtonRelease
154 : QEvent::MouseMove;
155 mLastMouseGlobal = tp.area.center();
156 QPoint globalPoint = mLastMouseGlobal.toPoint();
157 QPointF delta = mLastMouseGlobal - globalPoint;
158 mLastMouseLocal = mTargetWindow->mapFromGlobal(pos: globalPoint) + delta;
159 QWindowSystemInterface::handleMouseEvent(window: mTargetWindow, timestamp: mTimestamp, local: mLastMouseLocal, global: mLastMouseGlobal,
160 state: buttons, button: Qt::LeftButton, type: eventType);
161 if (buttons == Qt::NoButton)
162 mMouseSourceId = -1;
163 break;
164 }
165 }
166 }
167
168 mPrevTouchPoints = mTouchPoints;
169 mTouchPoints.clear();
170
171 if (states == QEventPoint::Released)
172 mPrevTouchPoints.clear();
173}
174
175void QWaylandTouchExtension::touchCanceled()
176{
177 mTouchPoints.clear();
178 mPrevTouchPoints.clear();
179 if (mMouseSourceId != -1)
180 QWindowSystemInterface::handleMouseEvent(window: mTargetWindow, timestamp: mTimestamp, local: mLastMouseLocal, global: mLastMouseGlobal, state: Qt::NoButton, button: Qt::LeftButton, type: QEvent::MouseButtonRelease);
181}
182
183void QWaylandTouchExtension::touch_extension_configure(uint32_t flags)
184{
185 mFlags = flags;
186}
187
188}
189
190QT_END_NAMESPACE
191

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source code of qtwayland/src/client/qwaylandtouch.cpp