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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 "qevdevmousemanager_p.h"
#include <QtInputSupport/private/qevdevutil_p.h>
#include <QStringList>
#include <QGuiApplication>
#include <QScreen>
#include <QLoggingCategory>
#include <qpa/qwindowsysteminterface.h>
#include <QtDeviceDiscoverySupport/private/qdevicediscovery_p.h>
#include <private/qguiapplication_p.h>
#include <private/qinputdevicemanager_p_p.h>
#include <private/qhighdpiscaling_p.h>
QT_BEGIN_NAMESPACE
using namespace Qt::StringLiterals;
Q_DECLARE_LOGGING_CATEGORY(qLcEvdevMouse)
QEvdevMouseManager::QEvdevMouseManager(const QString &key, const QString &specification, QObject *parent)
: QObject(parent), m_x(0), m_y(0), m_xoffset(0), m_yoffset(0)
{
Q_UNUSED(key);
QString spec = QString::fromLocal8Bit(qgetenv("QT_QPA_EVDEV_MOUSE_PARAMETERS"));
if (spec.isEmpty())
spec = specification;
auto parsed = QEvdevUtil::parseSpecification(spec);
m_spec = std::move(parsed.spec);
for (const auto &arg : std::as_const(parsed.args)) {
if (arg.startsWith("xoffset="_L1)) {
m_xoffset = arg.mid(8).toInt();
} else if (arg.startsWith("yoffset="_L1)) {
m_yoffset = arg.mid(8).toInt();
}
}
// add all mice for devices specified in the argument list
for (const QString &device : std::as_const(parsed.devices))
addMouse(device);
if (parsed.devices.isEmpty()) {
qCDebug(qLcEvdevMouse, "evdevmouse: Using device discovery");
if (auto deviceDiscovery = QDeviceDiscovery::create(QDeviceDiscovery::Device_Mouse | QDeviceDiscovery::Device_Touchpad, this)) {
// scan and add already connected keyboards
const QStringList devices = deviceDiscovery->scanConnectedDevices();
for (const QString &device : devices)
addMouse(device);
connect(deviceDiscovery, &QDeviceDiscovery::deviceDetected,
this, &QEvdevMouseManager::addMouse);
connect(deviceDiscovery, &QDeviceDiscovery::deviceRemoved,
this, &QEvdevMouseManager::removeMouse);
}
}
QInputDeviceManager *manager = QGuiApplicationPrivate::inputDeviceManager();
connect(manager, &QInputDeviceManager::cursorPositionChangeRequested, this, [this](const QPoint &pos) {
m_x = pos.x();
m_y = pos.y();
clampPosition();
});
}
QEvdevMouseManager::~QEvdevMouseManager()
{
}
void QEvdevMouseManager::clampPosition()
{
// clamp to screen geometry
QScreen *primaryScreen = QGuiApplication::primaryScreen();
QRect g = QHighDpi::toNativePixels(primaryScreen->virtualGeometry(), primaryScreen);
if (m_x + m_xoffset < g.left())
m_x = g.left() - m_xoffset;
else if (m_x + m_xoffset > g.right())
m_x = g.right() - m_xoffset;
if (m_y + m_yoffset < g.top())
m_y = g.top() - m_yoffset;
else if (m_y + m_yoffset > g.bottom())
m_y = g.bottom() - m_yoffset;
}
void QEvdevMouseManager::handleMouseEvent(int x, int y, bool abs, Qt::MouseButtons buttons,
Qt::MouseButton button, QEvent::Type type)
{
// update current absolute coordinates
if (!abs) {
m_x += x;
m_y += y;
} else {
m_x = x;
m_y = y;
}
clampPosition();
QPoint pos(m_x + m_xoffset, m_y + m_yoffset);
// Cannot track the keyboard modifiers ourselves here. Instead, report the
// modifiers from the last key event that has been seen by QGuiApplication.
QWindowSystemInterface::handleMouseEvent(0, pos, pos, buttons, button, type, QGuiApplicationPrivate::inputDeviceManager()->keyboardModifiers());
}
void QEvdevMouseManager::handleWheelEvent(QPoint delta)
{
QPoint pos(m_x + m_xoffset, m_y + m_yoffset);
QWindowSystemInterface::handleWheelEvent(0, pos, pos, QPoint(), delta, QGuiApplicationPrivate::inputDeviceManager()->keyboardModifiers());
}
void QEvdevMouseManager::addMouse(const QString &deviceNode)
{
qCDebug(qLcEvdevMouse, "Adding mouse at %ls", qUtf16Printable(deviceNode));
auto handler = QEvdevMouseHandler::create(deviceNode, m_spec);
if (handler) {
connect(handler.get(), &QEvdevMouseHandler::handleMouseEvent,
this, &QEvdevMouseManager::handleMouseEvent);
connect(handler.get(), &QEvdevMouseHandler::handleWheelEvent,
this, &QEvdevMouseManager::handleWheelEvent);
m_mice.add(deviceNode, std::move(handler));
updateDeviceCount();
} else {
qWarning("evdevmouse: Failed to open mouse device %ls", qUtf16Printable(deviceNode));
}
}
void QEvdevMouseManager::removeMouse(const QString &deviceNode)
{
if (m_mice.remove(deviceNode)) {
qCDebug(qLcEvdevMouse, "Removing mouse at %ls", qUtf16Printable(deviceNode));
updateDeviceCount();
}
}
void QEvdevMouseManager::updateDeviceCount()
{
QInputDeviceManagerPrivate::get(QGuiApplicationPrivate::inputDeviceManager())->setDeviceCount(
QInputDeviceManager::DeviceTypePointer, m_mice.count());
}
QT_END_NAMESPACE
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