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39
40 #include "qevdevtouchmanager_p.h"
41 #include "qevdevtouchhandler_p.h"
42
43 #include <QtInputSupport/private/qevdevutil_p.h>
44
45 #include <QStringList>
46 #include <QGuiApplication>
47 #include <QLoggingCategory>
48 #include <QtDeviceDiscoverySupport/private/qdevicediscovery_p.h>
49 #include <private/qguiapplication_p.h>
50 #include <private/qinputdevicemanager_p_p.h>
51 #include <private/qmemory_p.h>
52
53 QT_BEGIN_NAMESPACE
54
Q_DECLARE_LOGGING_CATEGORY(qLcEvdevTouch)55 Q_DECLARE_LOGGING_CATEGORY(qLcEvdevTouch)
56
57 QEvdevTouchManager::QEvdevTouchManager(const QString &key, const QString &specification, QObject *parent)
58 : QObject(parent)
59 {
60 Q_UNUSED(key);
61
62 if (qEnvironmentVariableIsSet("QT_QPA_EVDEV_DEBUG"))
63 const_cast<QLoggingCategory &>(qLcEvdevTouch()).setEnabled(QtDebugMsg, true);
64
65 QString spec = QString::fromLocal8Bit(qgetenv("QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS"));
66
67 if (spec.isEmpty())
68 spec = specification;
69
70 auto parsed = QEvdevUtil::parseSpecification(spec);
71 m_spec = std::move(parsed.spec);
72
73 for (const QString &device : qAsConst(parsed.devices))
74 addDevice(device);
75
76 // when no devices specified, use device discovery to scan and monitor
77 if (parsed.devices.isEmpty()) {
78 qCDebug(qLcEvdevTouch, "evdevtouch: Using device discovery");
79 if (auto deviceDiscovery = QDeviceDiscovery::create(QDeviceDiscovery::Device_Touchpad | QDeviceDiscovery::Device_Touchscreen, this)) {
80 const QStringList devices = deviceDiscovery->scanConnectedDevices();
81 for (const QString &device : devices)
82 addDevice(device);
83
84 connect(deviceDiscovery, &QDeviceDiscovery::deviceDetected,
85 this, &QEvdevTouchManager::addDevice);
86 connect(deviceDiscovery, &QDeviceDiscovery::deviceRemoved,
87 this, &QEvdevTouchManager::removeDevice);
88 }
89 }
90 }
91
~QEvdevTouchManager()92 QEvdevTouchManager::~QEvdevTouchManager()
93 {
94 }
95
addDevice(const QString & deviceNode)96 void QEvdevTouchManager::addDevice(const QString &deviceNode)
97 {
98 qCDebug(qLcEvdevTouch, "evdevtouch: Adding device at %ls", qUtf16Printable(deviceNode));
99 auto handler = qt_make_unique<QEvdevTouchScreenHandlerThread>(deviceNode, m_spec);
100 if (handler) {
101 connect(handler.get(), &QEvdevTouchScreenHandlerThread::touchDeviceRegistered, this, &QEvdevTouchManager::updateInputDeviceCount);
102 m_activeDevices.add(deviceNode, std::move(handler));
103 } else {
104 qWarning("evdevtouch: Failed to open touch device %ls", qUtf16Printable(deviceNode));
105 }
106 }
107
removeDevice(const QString & deviceNode)108 void QEvdevTouchManager::removeDevice(const QString &deviceNode)
109 {
110 if (m_activeDevices.remove(deviceNode)) {
111 qCDebug(qLcEvdevTouch, "evdevtouch: Removing device at %ls", qUtf16Printable(deviceNode));
112 updateInputDeviceCount();
113 }
114 }
115
updateInputDeviceCount()116 void QEvdevTouchManager::updateInputDeviceCount()
117 {
118 int registeredTouchDevices = 0;
119 for (const auto &device : m_activeDevices) {
120 if (device.handler->isTouchDeviceRegistered())
121 ++registeredTouchDevices;
122 }
123
124 qCDebug(qLcEvdevTouch, "evdevtouch: Updating QInputDeviceManager device count: %d touch devices, %d pending handler(s)",
125 registeredTouchDevices, m_activeDevices.count() - registeredTouchDevices);
126
127 QInputDeviceManagerPrivate::get(QGuiApplicationPrivate::inputDeviceManager())->setDeviceCount(
128 QInputDeviceManager::DeviceTypeTouch, registeredTouchDevices);
129 }
130
131 QT_END_NAMESPACE
132