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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qwaylandtouch_p.h"
#include "qwaylandinputdevice_p.h"
#include "qwaylanddisplay_p.h"
#include "qwaylandsurface_p.h"
#include <QtGui/QPointingDevice>
QT_BEGIN_NAMESPACE
namespace QtWaylandClient {
QWaylandTouchExtension::QWaylandTouchExtension(QWaylandDisplay *display, uint32_t id)
: QtWayland::qt_touch_extension(display->wl_registry(), id, 1),
mDisplay(display),
mTouchDevice(nullptr),
mPointsLeft(0),
mFlags(0),
mMouseSourceId(-1),
mInputDevice(nullptr)
{
}
void QWaylandTouchExtension::registerDevice(int caps)
{
// TODO number of touchpoints, actual name and ID
mTouchDevice = new QPointingDevice(QLatin1String("some touchscreen"), 0,
QInputDevice::DeviceType::TouchScreen, QPointingDevice::PointerType::Finger,
QInputDevice::Capabilities(caps), 10, 0);
QWindowSystemInterface::registerInputDevice(mTouchDevice);
}
static inline qreal fromFixed(int f)
{
return f / qreal(10000);
}
void QWaylandTouchExtension::touch_extension_touch(uint32_t time,
uint32_t id, uint32_t state, int32_t x, int32_t y,
int32_t normalized_x, int32_t normalized_y,
int32_t width, int32_t height, uint32_t pressure,
int32_t velocity_x, int32_t velocity_y,
uint32_t flags, wl_array *rawdata)
{
if (!mInputDevice) {
QList<QWaylandInputDevice *> inputDevices = mDisplay->inputDevices();
if (inputDevices.isEmpty()) {
qWarning("qt_touch_extension: handle_touch: No input devices");
return;
}
mInputDevice = inputDevices.first();
}
QWaylandWindow *win = mInputDevice->touchFocus();
if (!win)
win = mInputDevice->pointerFocus();
if (!win)
win = mInputDevice->keyboardFocus();
if (!win || !win->window()) {
qWarning("qt_touch_extension: handle_touch: No pointer focus");
return;
}
mTargetWindow = win->window();
QWindowSystemInterface::TouchPoint tp;
tp.id = id;
tp.state = QEventPoint::State(int(state & 0xFFFF));
int sentPointCount = state >> 16;
if (!mPointsLeft) {
Q_ASSERT(sentPointCount > 0);
mPointsLeft = sentPointCount;
}
if (!mTouchDevice)
registerDevice(flags >> 16);
tp.area = QRectF(0, 0, fromFixed(width), fromFixed(height));
// Got surface-relative coords but need a (virtual) screen position.
QPointF relPos = QPointF(fromFixed(x), fromFixed(y));
QPointF delta = relPos - relPos.toPoint();
tp.area.moveCenter(mTargetWindow->mapToGlobal(relPos.toPoint()) + delta);
tp.normalPosition.setX(fromFixed(normalized_x));
tp.normalPosition.setY(fromFixed(normalized_y));
tp.pressure = pressure / 255.0;
tp.velocity.setX(fromFixed(velocity_x));
tp.velocity.setY(fromFixed(velocity_y));
if (rawdata) {
const int rawPosCount = rawdata->size / sizeof(float) / 2;
float *p = static_cast<float *>(rawdata->data);
for (int i = 0; i < rawPosCount; ++i) {
float x = *p++;
float y = *p++;
tp.rawPositions.append(QPointF(x, y));
}
}
mTouchPoints.append(tp);
mTimestamp = time;
if (!--mPointsLeft)
sendTouchEvent();
}
void QWaylandTouchExtension::sendTouchEvent()
{
// Copy all points, that are in the previous but not in the current list, as stationary.
for (int i = 0; i < mPrevTouchPoints.size(); ++i) {
const QWindowSystemInterface::TouchPoint &prevPoint(mPrevTouchPoints.at(i));
if (prevPoint.state == QEventPoint::Released)
continue;
bool found = false;
for (int j = 0; j < mTouchPoints.size(); ++j)
if (mTouchPoints.at(j).id == prevPoint.id) {
found = true;
break;
}
if (!found) {
QWindowSystemInterface::TouchPoint p = prevPoint;
p.state = QEventPoint::Stationary;
mTouchPoints.append(p);
}
}
if (mTouchPoints.isEmpty()) {
mPrevTouchPoints.clear();
return;
}
QWindowSystemInterface::handleTouchEvent(mTargetWindow, mTimestamp, mTouchDevice, mTouchPoints);
QEventPoint::States states = {};
for (int i = 0; i < mTouchPoints.size(); ++i)
states |= mTouchPoints.at(i).state;
if (mFlags & QT_TOUCH_EXTENSION_FLAGS_MOUSE_FROM_TOUCH) {
const bool firstPress = states == QEventPoint::Pressed;
if (firstPress)
mMouseSourceId = mTouchPoints.first().id;
for (int i = 0; i < mTouchPoints.size(); ++i) {
const QWindowSystemInterface::TouchPoint &tp(mTouchPoints.at(i));
if (tp.id == mMouseSourceId) {
const bool released = tp.state == QEventPoint::Released;
Qt::MouseButtons buttons = released ? Qt::NoButton : Qt::LeftButton;
QEvent::Type eventType = firstPress ? QEvent::MouseButtonPress
: released ? QEvent::MouseButtonRelease
: QEvent::MouseMove;
mLastMouseGlobal = tp.area.center();
QPoint globalPoint = mLastMouseGlobal.toPoint();
QPointF delta = mLastMouseGlobal - globalPoint;
mLastMouseLocal = mTargetWindow->mapFromGlobal(globalPoint) + delta;
QWindowSystemInterface::handleMouseEvent(mTargetWindow, mTimestamp, mLastMouseLocal, mLastMouseGlobal,
buttons, Qt::LeftButton, eventType);
if (buttons == Qt::NoButton)
mMouseSourceId = -1;
break;
}
}
}
mPrevTouchPoints = mTouchPoints;
mTouchPoints.clear();
if (states == QEventPoint::Released)
mPrevTouchPoints.clear();
}
void QWaylandTouchExtension::touchCanceled()
{
mTouchPoints.clear();
mPrevTouchPoints.clear();
if (mMouseSourceId != -1)
QWindowSystemInterface::handleMouseEvent(mTargetWindow, mTimestamp, mLastMouseLocal, mLastMouseGlobal, Qt::NoButton, Qt::LeftButton, QEvent::MouseButtonRelease);
}
void QWaylandTouchExtension::touch_extension_configure(uint32_t flags)
{
mFlags = flags;
}
}
QT_END_NAMESPACE
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