[FEATURE] Data-defined size and rotation for single symbol renderer i…

…n symbology-ng. (ticket #2585)

Developed by for Faunalia (http://www.faunalia.it) with funding from Regione Toscana - Sistema Informativo per
la Gestione del Territorio e dell' Ambiente [RT-SIGTA]".
For the project: "Sviluppo di prodotti software GIS open-source basati sui prodotti
QuantumGIS e Postgis (CIG 037728516E)



git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@13389 c8812cc2-4d05-0410-92ff-de0c093fc19c

python/core/symbology-ng-core.sip

@@ -133,6 +133,12 @@ public:
   QgsSymbolV2* symbol() const;
   void setSymbol(QgsSymbolV2* s /Transfer/);
 
+  void setRotationField(QString fieldName);
+  QString rotationField() const;
+
+  void setSizeScaleField(QString fieldName);
+  QString sizeScaleField() const;
+
   virtual QString dump();
 
   virtual QgsFeatureRendererV2* clone() /Factory/;
@@ -453,7 +459,7 @@ class QgsSymbolV2RenderContext
 %End
 
     public:
-    QgsSymbolV2RenderContext( QgsRenderContext& c, QgsSymbolV2::OutputUnit u , qreal alpha = 1.0, bool selected = false );
+    QgsSymbolV2RenderContext( QgsRenderContext& c, QgsSymbolV2::OutputUnit u , qreal alpha = 1.0, bool selected = false, int renderHints = 0 );
     ~QgsSymbolV2RenderContext();
 
     QgsRenderContext& renderContext();
@@ -468,6 +474,11 @@ class QgsSymbolV2RenderContext
     bool selected() const;
     void setSelected( bool selected ) const;
 
+    int renderHints() const;
+    void setRenderHints( int hints );
+
+    // Colour used for selections
+
     static QColor selectionColor();
 
     double outputLineWidth(double width) const;
@@ -510,6 +521,12 @@ public:
   	Fill
   };
 
+    enum RenderHint
+    {
+      DataDefinedSizeScale = 1,
+      DataDefinedRotation = 2
+    };
+
   virtual ~QgsSymbolV2();
 
   //! return new default symbol for specified geometry type
@@ -556,6 +573,12 @@ public:
     OutputUnit outputUnit() const;
     void setOutputUnit( OutputUnit u );
 
+    qreal alpha() const;
+    void setAlpha( qreal alpha );
+
+    int renderHints() const;
+    void setRenderHints( int hints );
+
 protected:
   QgsSymbolV2(SymbolType type, QgsSymbolLayerV2List layers /Transfer/); // can't be instantiated