Base commit to make QtSensors runnable on Windows

Fair amount of work remains after the commit still, but this should
allow further development as a compilable baseline: code compiles,
autotests pass, and most example applications at least start.

The changes:
-Change examples to use QtQuickControls 2 as per removal of v1
-Fix ambiguous conditional expression compilation error
-Link against runtimeobject library (previously part of winrt QPA?)
-Change the .pro file rule to win32 as winrt moniker does not exist anymore
-Remove references to deleted winrt event dispatcher
-Fix error handling: getdefault may be successful even if there is no default sensor
-Fix QCOMPARE failure output (toString has changed in Qt6)
-Remove qtimestamp alias which was deprecated already in Qt5
-Remove unit test hook that does not seem to be used anywhere
-From typedef to ‘using’ for readability
-Q_ENUMS -> Q_ENUM as the former has been obsoleted by the latter
-Add qt6 changes qdoc page

Task-number: QTBUG-88616
Change-Id: I92c168228ba76106b2c636c88f54331c76c3d2e6
Reviewed-by: Karsten Heimrich <karsten.heimrich@qt.io>
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>
Reviewed-by: Alex Blasche <alexander.blasche@qt.io>

3 files changed, 62 insertions, 9 deletions

diff --git a/src/sensors/doc/src/qt6-changes.qdoc b/src/sensors/doc/src/qt6-changes.qdoc
new file mode 100644
index 00000000..e4447a2f
--- /dev/null
+++ b/src/sensors/doc/src/qt6-changes.qdoc
@@ -0,0 +1,55 @@
+/****************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the documentation of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:FDL$
+** 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 https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Free Documentation License Usage
+** Alternatively, this file may be used under the terms of the GNU Free
+** Documentation License version 1.3 as published by the Free Software
+** Foundation and appearing in the file included in the packaging of
+** this file. Please review the following information to ensure
+** the GNU Free Documentation License version 1.3 requirements
+** will be met: https://www.gnu.org/licenses/fdl-1.3.html.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/*!
+    \page qtsensors-changes-qt6.html
+    \title Changes to Qt Sensors
+    \ingroup changes-qt-5-to-6
+    \brief Migrate Qt Sensors to Qt 6.
+
+    Qt 6 is a result of the conscious effort to make the framework more
+    efficient and easy to use.
+
+    We try to maintain binary and source compatibility for all the public
+    APIs in each release. But some changes were inevitable in an effort to
+    make Qt a better framework.
+
+    In this topic we summarize those changes in Qt Sensors, and provide
+    guidance to handle them.
+
+    \section1 Platform notes
+
+    On Windows the Qt6 does not support the UWP (Universal Windows Platform)
+    any longer. As such the QtSensors now builds on the Win32
+
+    \section1 API changes
+
+    \section2 Deleted typedef for qtimestamp
+
+    The typedef for the historical, QtMobility-era, 'qtimestamp' has been
+    removed. Use the actual type 'quint64' directly.
+*/
diff --git a/src/sensors/qsensor.h b/src/sensors/qsensor.h
index 7dd7ea19..c988a661 100644
--- a/src/sensors/qsensor.h
+++ b/src/sensors/qsensor.h
@@ -56,26 +56,22 @@ class QSensorReading;
 class QSensorReadingPrivate;
 class QSensorFilter;
 
-// This type is no longer used in the API but third party apps may be using it
-typedef quint64 qtimestamp;
+using qrange = QPair<int,int>;
+using qrangelist = QList<qrange>;
 
-typedef QPair<int,int> qrange;
-typedef QList<qrange> qrangelist;
 struct qoutputrange
 {
     qreal minimum;
     qreal maximum;
     qreal accuracy;
 };
-typedef QList<qoutputrange> qoutputrangelist;
+
+using qoutputrangelist = QList<qoutputrange>;
 
 class Q_SENSORS_EXPORT QSensor : public QObject
 {
     friend class QSensorBackend;
-
     Q_OBJECT
-    Q_ENUMS(Feature)
-    Q_ENUMS(AxesOrientationMode)
     Q_PROPERTY(QByteArray identifier READ identifier WRITE setIdentifier)
     Q_PROPERTY(QByteArray type READ type)
     Q_PROPERTY(bool connectedToBackend READ isConnectedToBackend)
@@ -108,6 +104,7 @@ public:
         PressureSensorTemperature,
         Reserved = 257 // Make sure at least 2 bytes are used for the enum to avoid breaking BC later
     };
+    Q_ENUM(Feature)
 
     // Keep in sync with QmlSensor::AxesOrientationMode
     enum AxesOrientationMode {
@@ -115,6 +112,7 @@ public:
         AutomaticOrientation,
         UserOrientation
     };
+    Q_ENUM(AxesOrientationMode)
 
     explicit QSensor(const QByteArray &type, QObject *parent = Q_NULLPTR);
     virtual ~QSensor();
diff --git a/src/sensors/qsensor_p.h b/src/sensors/qsensor_p.h
index f3e41e4d..5d4fff0f 100644
--- a/src/sensors/qsensor_p.h
+++ b/src/sensors/qsensor_p.h
@@ -77,7 +77,7 @@ public:
         , error(0)
         , alwaysOn(false)
         , skipDuplicates(false)
-        , axesOrientationMode(QSensor::FixedOrientation)
+        , axesOrientationMode(QSensor::AxesOrientationMode::FixedOrientation)
         , currentOrientation(0)
         , userOrientation(0)
         , bufferSize(1)