COMP: ctkVTKPiecewiseFunction must define isDiscrete

Libs/Visualization/VTK/Core/ctkVTKPiecewiseFunction.cpp

@@ -62,6 +62,12 @@ int ctkVTKPiecewiseFunction::count()const
 }
 
 //-----------------------------------------------------------------------------
+bool ctkVTKPiecewiseFunction::isDiscrete()const
+{
+  return false;
+}
+
+//-----------------------------------------------------------------------------
 void ctkVTKPiecewiseFunction::range(qreal& minRange, qreal& maxRange)const
 {
   CTK_D(const ctkVTKPiecewiseFunction);

Libs/Visualization/VTK/Core/ctkVTKPiecewiseFunction.h

@@ -45,6 +45,7 @@ public:
   virtual ctkControlPoint* controlPoint(int index)const;
   virtual QVariant value(qreal pos)const;
   virtual int count()const;
+  virtual bool isDiscrete()const;
 
   virtual void range(qreal& minRange, qreal& maxRange)const;
   virtual QVariant minValue()const;