udev: UDevHelper becomes DeviceDiscovery

Rename QUDeviceHelper to QDeviceDiscovery and add a static device
discovery fallback in case we dont have udev. The fallback so far only
scans /dev/input/event* and /dev/dri/card* at startup and detects device
nodes only by device path.

Change-Id: I7a423910b30ae16a10d8f1f47b86c6b4d2c2ec36
Reviewed-by: Girish Ramakrishnan <girish.1.ramakrishnan@nokia.com>
Reviewed-by: Donald Carr <donald.carr@nokia.com>

1 files changed, 5 insertions, 9 deletions

diff --git a/src/plugins/generic/evdevtouch/qevdevtouch.cpp b/src/plugins/generic/evdevtouch/qevdevtouch.cpp
index 37db20a419..c372b0d1ff 100644
--- a/src/plugins/generic/evdevtouch/qevdevtouch.cpp
+++ b/src/plugins/generic/evdevtouch/qevdevtouch.cpp
@@ -46,9 +46,7 @@
 #include <QGuiApplication>
 #include <QDebug>
 #include <QtCore/private/qcore_unix_p.h>
-#ifndef QT_NO_LIBUDEV
-#include <QtPlatformSupport/private/qudevicehelper_p.h>
-#endif // QT_NO_LIBUDEV
+#include <QtPlatformSupport/private/qdevicediscovery_p.h>
 #include <linux/input.h>
 
 #ifdef USE_MTDEV
@@ -159,22 +157,20 @@ QTouchScreenHandler::QTouchScreenHandler(const QString &spec)
         }
     }
 
-#ifndef QT_NO_LIBUDEV
     if (dev.isEmpty()) {
         // try to let udev scan for already connected devices
-        QScopedPointer<QUDeviceHelper> udeviceHelper(QUDeviceHelper::createUDeviceHelper(QUDeviceHelper::UDev_Touchpad | QUDeviceHelper::UDev_Touchscreen, this));
-        if (udeviceHelper) {
-            QStringList devices = udeviceHelper->scanConnectedDevices();
+        QScopedPointer<QDeviceDiscovery> deviceDiscovery(QDeviceDiscovery::create(QDeviceDiscovery::Device_Touchpad | QDeviceDiscovery::Device_Touchscreen, this));
+        if (deviceDiscovery) {
+            QStringList devices = deviceDiscovery->scanConnectedDevices();
 
             // only the first device found is used for now
             if (devices.size() > 0)
                 dev = devices[0];
         }
     }
-#endif // QT_NO_LIBUDEV
 
     if (dev.isEmpty())
-        dev = QLatin1String("/dev/input/event0");
+        return;
 
     qDebug("evdevtouch: Using device %s", qPrintable(dev));
     m_fd = QT_OPEN(dev.toLocal8Bit().constData(), O_RDONLY | O_NDELAY, 0);