Add missing proxies for legend check behaviour to subrenderers

for inverted polygon and displacement renderers

(cherry-picked from 7a8d9dd)

python/core/symbology-ng/qgspointdisplacementrenderer.sip

@@ -73,6 +73,10 @@ class QgsPointDisplacementRenderer : QgsFeatureRendererV2
 
     virtual void setLegendSymbolItem( const QString& key, QgsSymbolV2* symbol );
 
+    virtual bool legendSymbolItemsCheckable() const;
+    virtual bool legendSymbolItemChecked( const QString& key );
+    virtual void checkLegendSymbolItem( const QString& key, bool state = true );
+
     //! not available in python bindings
     //! @deprecated since 2.4
     // void setDisplacementGroups( const QList<QMap<QgsFeatureId, QgsFeature> >& list );

src/core/symbology-ng/qgsinvertedpolygonrenderer.cpp

@@ -72,6 +72,30 @@ void QgsInvertedPolygonRenderer::setLegendSymbolItem( const QString& key, QgsSym
   mSubRenderer->setLegendSymbolItem( key, symbol );
 }
 
+bool QgsInvertedPolygonRenderer::legendSymbolItemsCheckable() const
+{
+  if ( !mSubRenderer )
+    return false;
+
+  return mSubRenderer->legendSymbolItemsCheckable();
+}
+
+bool QgsInvertedPolygonRenderer::legendSymbolItemChecked( const QString& key )
+{
+  if ( !mSubRenderer )
+    return false;
+
+  return mSubRenderer->legendSymbolItemChecked( key );
+}
+
+void QgsInvertedPolygonRenderer::checkLegendSymbolItem( const QString& key, bool state )
+{
+  if ( !mSubRenderer )
+    return;
+
+  return mSubRenderer->checkLegendSymbolItem( key, state );
+}
+
 void QgsInvertedPolygonRenderer::startRender( QgsRenderContext& context, const QgsFields& fields )
 {
   if ( !mSubRenderer )

src/core/symbology-ng/qgsinvertedpolygonrenderer.h

@@ -123,6 +123,10 @@ class CORE_EXPORT QgsInvertedPolygonRenderer : public QgsFeatureRendererV2
 
     virtual void setLegendSymbolItem( const QString& key, QgsSymbolV2* symbol ) override;
 
+    virtual bool legendSymbolItemsCheckable() const override;
+    virtual bool legendSymbolItemChecked( const QString& key ) override;
+    virtual void checkLegendSymbolItem( const QString& key, bool state = true ) override;
+
     /** @returns true if the geometries are to be preprocessed (merged with an union) before rendering.*/
     bool preprocessingEnabled() const { return mPreprocessingEnabled; }
     /**

src/core/symbology-ng/qgspointdisplacementrenderer.cpp

@@ -234,6 +234,30 @@ void QgsPointDisplacementRenderer::setLegendSymbolItem( const QString& key, QgsS
   mRenderer->setLegendSymbolItem( key, symbol );
 }
 
+bool QgsPointDisplacementRenderer::legendSymbolItemsCheckable() const
+{
+  if ( !mRenderer )
+    return false;
+
+  return mRenderer->legendSymbolItemsCheckable();
+}
+
+bool QgsPointDisplacementRenderer::legendSymbolItemChecked( const QString& key )
+{
+  if ( !mRenderer )
+    return false;
+
+  return mRenderer->legendSymbolItemChecked( key );
+}
+
+void QgsPointDisplacementRenderer::checkLegendSymbolItem( const QString& key, bool state )
+{
+  if ( !mRenderer )
+    return;
+
+  return mRenderer->checkLegendSymbolItem( key, state );
+}
+
 QList<QString> QgsPointDisplacementRenderer::usedAttributes()
 {
   QList<QString> attributeList;

src/core/symbology-ng/qgspointdisplacementrenderer.h

@@ -100,6 +100,10 @@ class CORE_EXPORT QgsPointDisplacementRenderer: public QgsFeatureRendererV2
 
     virtual void setLegendSymbolItem( const QString& key, QgsSymbolV2* symbol ) override;
 
+    virtual bool legendSymbolItemsCheckable() const override;
+    virtual bool legendSymbolItemChecked( const QString& key ) override;
+    virtual void checkLegendSymbolItem( const QString& key, bool state = true ) override;
+
     //! not available in python bindings
     //! @deprecated since 2.4
     Q_DECL_DEPRECATED void setDisplacementGroups( const QList<QMap<QgsFeatureId, QgsFeature> >& list ) { Q_UNUSED( list ); }