Add API for duplicate skipping

Duplicate skipping enables omitting reading values
that are very similar to the previous one, thus saving
processing power.

Implement this for the Blackberry backend.

Change-Id: Ic608d8ca795b5a2e0bca5a75a62e8005c283c620
Reviewed-by: Thomas McGuire <thomas.mcguire@kdab.com>

4 files changed, 32 insertions, 1 deletions

diff --git a/src/imports/sensors/plugins.qmltypes b/src/imports/sensors/plugins.qmltypes
index 1429ae7..fe9c961 100644
--- a/src/imports/sensors/plugins.qmltypes
+++ b/src/imports/sensors/plugins.qmltypes
@@ -157,6 +157,7 @@ Module {
         name: "QmlSensor"
         prototype: "QObject"
         exports: ["Sensor 5.0", "Sensor 5.1"]
+        exportMetaObjectRevisions: [0, 1]
         Property { name: "identifier"; type: "string" }
         Property { name: "type"; type: "string"; isReadonly: true }
         Property { name: "connectedToBackend"; type: "bool"; isReadonly: true }
@@ -170,6 +171,11 @@ Module {
         Property { name: "description"; type: "string"; isReadonly: true }
         Property { name: "error"; type: "int"; isReadonly: true }
         Property { name: "alwaysOn"; type: "bool" }
+        Property { name: "skipDuplicates"; revision: 1; type: "bool" }
+        Signal {
+            name: "skipDuplicatesChanged"
+            Parameter { name: "skipDuplicates"; type: "bool" }
+        }
         Method { name: "start"; type: "bool" }
         Method { name: "stop" }
     }
diff --git a/src/imports/sensors/qmlsensor.cpp b/src/imports/sensors/qmlsensor.cpp
index ec1b069..40a0ebf 100644
--- a/src/imports/sensors/qmlsensor.cpp
+++ b/src/imports/sensors/qmlsensor.cpp
@@ -171,6 +171,25 @@ void QmlSensor::setAlwaysOn(bool alwaysOn)
 }
 
 /*!
+    \qmlproperty bool Sensor::skipDuplicates
+    \since QtSensors 5.1
+
+    This property indicates whether duplicate reading values should be omitted.
+
+    Please see QSensor::skipDuplicates for information about this property.
+*/
+
+bool QmlSensor::skipDuplicates() const
+{
+    return sensor()->skipDuplicates();
+}
+
+void QmlSensor::setSkipDuplicates(bool skipDuplicates)
+{
+    sensor()->setSkipDuplicates(skipDuplicates);
+}
+
+/*!
     \qmlproperty list<Range> Sensor::availableDataRates
     This property holds the data rates that the sensor supports.
 
@@ -323,6 +342,7 @@ void QmlSensor::componentComplete()
     connect(sensor(), SIGNAL(sensorError(int)), this, SIGNAL(errorChanged()));
     connect(sensor(), SIGNAL(activeChanged()), this, SIGNAL(activeChanged()));
     connect(sensor(), SIGNAL(alwaysOnChanged()), this, SIGNAL(alwaysOnChanged()));
+    connect(sensor(), SIGNAL(skipDuplicatesChanged(bool)), this, SIGNAL(skipDuplicatesChanged(bool)));
 
     // We need to set this on the sensor object now
     sensor()->setIdentifier(m_identifier.toLocal8Bit());
diff --git a/src/imports/sensors/qmlsensor.h b/src/imports/sensors/qmlsensor.h
index a4ac852..e287f19 100644
--- a/src/imports/sensors/qmlsensor.h
+++ b/src/imports/sensors/qmlsensor.h
@@ -71,6 +71,7 @@ class QmlSensor : public QObject, public QQmlParserStatus
     Q_PROPERTY(QString description READ description NOTIFY descriptionChanged)
     Q_PROPERTY(int error READ error NOTIFY errorChanged)
     Q_PROPERTY(bool alwaysOn READ isAlwaysOn WRITE setAlwaysOn NOTIFY alwaysOnChanged)
+    Q_PROPERTY(bool skipDuplicates READ skipDuplicates WRITE setSkipDuplicates NOTIFY skipDuplicatesChanged REVISION 1)
 public:
     explicit QmlSensor(QObject *parent = 0);
     ~QmlSensor();
@@ -90,6 +91,9 @@ public:
     bool isAlwaysOn() const;
     void setAlwaysOn(bool alwaysOn);
 
+    bool skipDuplicates() const;
+    void setSkipDuplicates(bool skipDuplicates);
+
     QQmlListProperty<QmlSensorRange> availableDataRates() const;
     int dataRate() const;
     void setDataRate(int rate);
@@ -120,6 +124,7 @@ Q_SIGNALS:
     void descriptionChanged();
     void errorChanged();
     void alwaysOnChanged();
+    void skipDuplicatesChanged(bool skipDuplicates);
 
 protected:
     virtual QSensor *sensor() const = 0;
diff --git a/src/imports/sensors/sensors.cpp b/src/imports/sensors/sensors.cpp
index 9392baf..3f77431 100644
--- a/src/imports/sensors/sensors.cpp
+++ b/src/imports/sensors/sensors.cpp
@@ -133,7 +133,7 @@ public:
         qmlRegisterSingletonType  <QmlSensorGlobal             >(package, major, minor, "QmlSensors", global_object_50);
         qmlRegisterUncreatableType<QmlSensorRange              >(package, major, minor, "Range",                QLatin1String("Cannot create Range"));
         qmlRegisterUncreatableType<QmlSensorOutputRange        >(package, major, minor, "OutputRange",          QLatin1String("Cannot create OutputRange"));
-        qmlRegisterUncreatableType<QmlSensor                   >(package, major, minor, "Sensor",               QLatin1String("Cannot create Sensor"));
+        qmlRegisterUncreatableType<QmlSensor,1                 >(package, major, minor, "Sensor",               QLatin1String("Cannot create Sensor"));
         qmlRegisterUncreatableType<QmlSensorReading            >(package, major, minor, "SensorReading",        QLatin1String("Cannot create SensorReading"));
         qmlRegisterType           <QmlAccelerometer,1          >(package, major, minor, "Accelerometer");
         qmlRegisterUncreatableType<QmlAccelerometerReading     >(package, major, minor, "AccelerometerReading", QLatin1String("Cannot create AccelerometerReading"));