Allow storing QgsProperty in QVariant

Author: nyalldawson

python/core/qgsproperty.sip

@@ -137,6 +137,8 @@ class QgsProperty
 
     bool convertToTransformer();
 
+    operator QVariant() const;
+
 };
 
 

src/core/qgsproperty.h

@@ -434,6 +434,12 @@ class CORE_EXPORT QgsProperty
      */
     bool convertToTransformer();
 
+    //! Allows direct construction of QVariants from properties.
+    operator QVariant() const
+    {
+      return QVariant::fromValue( *this );
+    }
+
   private:
 
     mutable QExplicitlySharedDataPointer<QgsPropertyPrivate> d;
@@ -446,4 +452,6 @@ class CORE_EXPORT QgsProperty
 
 };
 
+Q_DECLARE_METATYPE( QgsProperty )
+
 #endif // QGSPROPERTY_H

tests/src/core/testqgsproperty.cpp

@@ -92,6 +92,7 @@ class TestQgsProperty : public QObject
     void propertyCollection(); //test for QgsPropertyCollection
     void collectionStack(); //test for QgsPropertyCollectionStack
     void curveTransform();
+    void asVariant();
 
   private:
 
@@ -1764,6 +1765,20 @@ void TestQgsProperty::curveTransform()
   QGSCOMPARENEAR( dest2.y( 0.5 ), 0.1, 0.638672 );
 }
 
+void TestQgsProperty::asVariant()
+{
+  QgsProperty original = QgsProperty::fromField( QStringLiteral( "field1" ), true );
+
+  //convert to and from a QVariant
+  QVariant var = QVariant::fromValue( original );
+  QVERIFY( var.isValid() );
+
+  QgsProperty fromVar = qvariant_cast<QgsProperty>( var );
+  QCOMPARE( fromVar.propertyType(), QgsProperty::FieldBasedProperty );
+  QVERIFY( fromVar.isActive() );
+  QCOMPARE( fromVar.field(), QStringLiteral( "field1" ) );
+}
+
 void TestQgsProperty::checkCurveResult( const QList<QgsPoint> &controlPoints, const QVector<double> &x, const QVector<double> &y )
 {
   // build transform