class QgsHistogramDiagram: QgsDiagram
{
%TypeHeaderCode
#include <qgshistogramdiagram.h>
%End
  public:
    QgsHistogramDiagram();
    ~QgsHistogramDiagram();

    virtual QgsHistogramDiagram *clone() const /Factory/;

    void renderDiagram( const QgsFeature &feature, QgsRenderContext &c, const QgsDiagramSettings &s, QPointF position );

    QSizeF diagramSize( const QgsAttributes &attributes, const QgsRenderContext &c, const QgsDiagramSettings &s );
    QSizeF diagramSize( const QgsFeature &feature, const QgsRenderContext &c, const QgsDiagramSettings &s, const QgsDiagramInterpolationSettings &is );
    double legendSize( double value, const QgsDiagramSettings &s, const QgsDiagramInterpolationSettings &is ) const;
    QString diagramName() const;
};