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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 "qevdevtouchmanager_p.h"
#include "qevdevtouchhandler_p.h"
#include <QtInputSupport/private/qevdevutil_p.h>
#include <QStringList>
#include <QGuiApplication>
#include <QLoggingCategory>
#include <QtDeviceDiscoverySupport/private/qdevicediscovery_p.h>
#include <private/qguiapplication_p.h>
#include <private/qinputdevicemanager_p_p.h>
QT_BEGIN_NAMESPACE
Q_DECLARE_LOGGING_CATEGORY(qLcEvdevTouch)
QEvdevTouchManager::QEvdevTouchManager(const QString &key, const QString &specification, QObject *parent)
: QObject(parent)
{
Q_UNUSED(key);
if (qEnvironmentVariableIsSet("QT_QPA_EVDEV_DEBUG"))
const_cast<QLoggingCategory &>(qLcEvdevTouch()).setEnabled(QtDebugMsg, true);
QString spec = QString::fromLocal8Bit(qgetenv("QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS"));
if (spec.isEmpty())
spec = specification;
auto parsed = QEvdevUtil::parseSpecification(spec);
m_spec = std::move(parsed.spec);
for (const QString &device : qAsConst(parsed.devices))
addDevice(device);
// when no devices specified, use device discovery to scan and monitor
if (parsed.devices.isEmpty()) {
qCDebug(qLcEvdevTouch, "evdevtouch: Using device discovery");
if (auto deviceDiscovery = QDeviceDiscovery::create(QDeviceDiscovery::Device_Touchpad | QDeviceDiscovery::Device_Touchscreen, this)) {
const QStringList devices = deviceDiscovery->scanConnectedDevices();
for (const QString &device : devices)
addDevice(device);
connect(deviceDiscovery, &QDeviceDiscovery::deviceDetected,
this, &QEvdevTouchManager::addDevice);
connect(deviceDiscovery, &QDeviceDiscovery::deviceRemoved,
this, &QEvdevTouchManager::removeDevice);
}
}
}
QEvdevTouchManager::~QEvdevTouchManager()
{
}
void QEvdevTouchManager::addDevice(const QString &deviceNode)
{
qCDebug(qLcEvdevTouch, "evdevtouch: Adding device at %ls", qUtf16Printable(deviceNode));
auto handler = std::make_unique<QEvdevTouchScreenHandlerThread>(deviceNode, m_spec);
if (handler) {
connect(handler.get(), &QEvdevTouchScreenHandlerThread::touchDeviceRegistered, this, &QEvdevTouchManager::updateInputDeviceCount);
m_activeDevices.add(deviceNode, std::move(handler));
} else {
qWarning("evdevtouch: Failed to open touch device %ls", qUtf16Printable(deviceNode));
}
}
void QEvdevTouchManager::removeDevice(const QString &deviceNode)
{
if (m_activeDevices.remove(deviceNode)) {
qCDebug(qLcEvdevTouch, "evdevtouch: Removing device at %ls", qUtf16Printable(deviceNode));
updateInputDeviceCount();
}
}
void QEvdevTouchManager::updateInputDeviceCount()
{
int registeredTouchDevices = 0;
for (const auto &device : m_activeDevices) {
if (device.handler->isPointingDeviceRegistered())
++registeredTouchDevices;
}
qCDebug(qLcEvdevTouch, "evdevtouch: Updating QInputDeviceManager device count: %d touch devices, %d pending handler(s)",
registeredTouchDevices, m_activeDevices.count() - registeredTouchDevices);
QInputDeviceManagerPrivate::get(QGuiApplicationPrivate::inputDeviceManager())->setDeviceCount(
QInputDeviceManager::DeviceTypeTouch, registeredTouchDevices);
}
QT_END_NAMESPACE
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