From 2314286883dd7d31db05115ced82d6916499d933 Mon Sep 17 00:00:00 2001 From: Laszlo Agocs Date: Wed, 25 Mar 2015 11:36:29 +0100 Subject: evdevtouch: Add hotplug support Follow the exact same structure as evdevmouse and keyboard. We must do monitoring via device discovery just like we do for keyboards and mice. Otherwise the usage of touchscreens that connect via USB or can be turned on/off independently from the board becomes troublesome. Change-Id: I2de3b519e8d617b0612e5df486e481bbc09b9c8c Reviewed-by: Andy Nichols --- .../input/evdevtouch/qevdevtouchmanager.cpp | 122 +++++++++++++++++++++ 1 file changed, 122 insertions(+) create mode 100644 src/platformsupport/input/evdevtouch/qevdevtouchmanager.cpp (limited to 'src/platformsupport/input/evdevtouch/qevdevtouchmanager.cpp') diff --git a/src/platformsupport/input/evdevtouch/qevdevtouchmanager.cpp b/src/platformsupport/input/evdevtouch/qevdevtouchmanager.cpp new file mode 100644 index 0000000000..98fc83700c --- /dev/null +++ b/src/platformsupport/input/evdevtouch/qevdevtouchmanager.cpp @@ -0,0 +1,122 @@ +/**************************************************************************** +** +** Copyright (C) 2015 The Qt Company Ltd. +** Contact: http://www.qt.io/licensing/ +** +** This file is part of the plugins module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL21$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see http://www.qt.io/terms-conditions. For further +** information use the contact form at http://www.qt.io/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 or version 3 as published by the Free +** Software Foundation and appearing in the file LICENSE.LGPLv21 and +** LICENSE.LGPLv3 included in the packaging of this file. Please review the +** following information to ensure the GNU Lesser General Public License +** requirements will be met: https://www.gnu.org/licenses/lgpl.html and +** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** As a special exception, The Qt Company gives you certain additional +** rights. These rights are described in The Qt Company LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qevdevtouchmanager_p.h" +#include "qevdevtouchhandler_p.h" + +#include +#include +#include +#include +#include +#include + +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(qLcEvdevTouch()).setEnabled(QtDebugMsg, true); + + QString spec = QString::fromLocal8Bit(qgetenv("QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS")); + + if (spec.isEmpty()) + spec = specification; + + QStringList args = spec.split(QLatin1Char(':')); + QStringList devices; + + foreach (const QString &arg, args) { + if (arg.startsWith(QLatin1String("/dev/"))) { + devices.append(arg); + args.removeAll(arg); + } + } + + // build new specification without /dev/ elements + m_spec = args.join(QLatin1Char(':')); + + foreach (const QString &device, devices) + addDevice(device); + + // when no devices specified, use device discovery to scan and monitor + if (devices.isEmpty()) { + qCDebug(qLcEvdevTouch) << "evdevtouch: Using device discovery"; + m_deviceDiscovery = QDeviceDiscovery::create(QDeviceDiscovery::Device_Touchpad | QDeviceDiscovery::Device_Touchscreen, this); + if (m_deviceDiscovery) { + QStringList devices = m_deviceDiscovery->scanConnectedDevices(); + foreach (const QString &device, devices) + addDevice(device); + connect(m_deviceDiscovery, SIGNAL(deviceDetected(QString)), this, SLOT(addDevice(QString))); + connect(m_deviceDiscovery, SIGNAL(deviceRemoved(QString)), this, SLOT(removeDevice(QString))); + } + } +} + +QEvdevTouchManager::~QEvdevTouchManager() +{ + qDeleteAll(m_activeDevices); +} + +void QEvdevTouchManager::addDevice(const QString &deviceNode) +{ + qCDebug(qLcEvdevTouch) << "Adding device at" << deviceNode; + QEvdevTouchScreenHandlerThread *handler; + handler = new QEvdevTouchScreenHandlerThread(deviceNode, m_spec); + if (handler) { + m_activeDevices.insert(deviceNode, handler); + QInputDeviceManagerPrivate::get(QGuiApplicationPrivate::inputDeviceManager())->setDeviceCount( + QInputDeviceManager::DeviceTypeTouch, m_activeDevices.count()); + } else { + qWarning("evdevtouch: Failed to open touch device %s", qPrintable(deviceNode)); + } +} + +void QEvdevTouchManager::removeDevice(const QString &deviceNode) +{ + if (m_activeDevices.contains(deviceNode)) { + qCDebug(qLcEvdevTouch) << "Removing device at" << deviceNode; + QEvdevTouchScreenHandlerThread *handler = m_activeDevices.value(deviceNode); + m_activeDevices.remove(deviceNode); + QInputDeviceManagerPrivate::get(QGuiApplicationPrivate::inputDeviceManager())->setDeviceCount( + QInputDeviceManager::DeviceTypeTouch, m_activeDevices.count()); + delete handler; + } +} + +QT_END_NAMESPACE -- cgit v1.2.3