Allow setting backend properties of positioning plugins

This change adds a pair of setter/getter to specify positioning backend
properties at runtime, both in QGeoPositionInfoSource and
QDeclarativePositionSource.

Task-number: QTBUG-66304
Change-Id: Iea9421fb708879bee5c62c4afaf45cbda57f50bb
Reviewed-by: Alex Blasche <alexander.blasche@qt.io>

2 files changed, 41 insertions, 0 deletions

diff --git a/src/positioningquick/qdeclarativepositionsource.cpp b/src/positioningquick/qdeclarativepositionsource.cpp
index 3bf39081..cfbcc9da 100644
--- a/src/positioningquick/qdeclarativepositionsource.cpp
+++ b/src/positioningquick/qdeclarativepositionsource.cpp
@@ -862,6 +862,44 @@ void QDeclarativePositionSource::componentComplete()
 }
 
 /*!
+     \qmlmethod bool QtLocation::PositionSource::setBackendProperty(string name, Variant value)
+
+    Sets the backend-specific property named \a name to \a value.
+    Returns true on success, false otherwise, including if called on an uninitialized PositionSource.
+    Supported backend-specific properties are listed and described in
+    \l {Qt Positioning plugins#Default plugins}.
+
+    \since Qt Positioning 5.14
+
+    \sa backendProperty, QGeoPositionInfoSource::setBackendProperty
+*/
+bool QDeclarativePositionSource::setBackendProperty(const QString &name, QVariant value)
+{
+    if (m_positionSource)
+        return m_positionSource->setBackendProperty(name, value);
+    return false;
+}
+
+/*!
+     \qmlmethod Variant QtLocation::PositionSource::backendProperty(string name)
+
+    Returns the value of the backend-specific property named \a name, if present.
+    Otherwise, including if called on an uninitialized PositionSource, the return value will be invalid.
+    Supported backend-specific properties are listed and described in
+    \l {Qt Positioning plugins#Default plugins}.
+
+    \since Qt Positioning 5.14
+
+    \sa backendProperty, QGeoPositionInfoSource::setBackendProperty
+*/
+QVariant QDeclarativePositionSource::backendProperty(const QString &name) const
+{
+    if (m_positionSource)
+        return m_positionSource->backendProperty(name);
+    return QVariant();
+}
+
+/*!
     \internal
 */
 void QDeclarativePositionSource::sourceErrorReceived(const QGeoPositionInfoSource::Error error)
diff --git a/src/positioningquick/qdeclarativepositionsource_p.h b/src/positioningquick/qdeclarativepositionsource_p.h
index 7e389b85..dff0006c 100644
--- a/src/positioningquick/qdeclarativepositionsource_p.h
+++ b/src/positioningquick/qdeclarativepositionsource_p.h
@@ -131,6 +131,9 @@ public:
     void classBegin() { }
     void componentComplete();
 
+    Q_INVOKABLE bool setBackendProperty(const QString &name, QVariant value);
+    Q_INVOKABLE QVariant backendProperty(const QString &name) const;
+
 public Q_SLOTS:
     void update(); // TODO Qt 6 change to void update(int)
     void start();