PlotDateScaleEngine.h

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#ifndef PLOT_DATE_SCALE_ENGINE_H
#define PLOT_DATE_SCALE_ENGINE_H

#include <qwt_scale_engine.h>

class PlotDateScaleEngine : public QwtScaleEngine
{
  //================================================================================
  // Constructors and destructor
  //================================================================================
  public:
    PlotDateScaleEngine();
    virtual ~PlotDateScaleEngine();

  //================================================================================
  // Member functions
  //================================================================================
  public:
    virtual void autoScale( int maxSteps, double &x1, double &x2, double &stepSize ) const;
    virtual double divideInterval( double intervalSize, int numSteps ) const;
    virtual QwtScaleDiv divideScale( double x1, double x2, int numMajorSteps, int numMinorSteps, double stepSize = 0.0 ) const;
    virtual QwtScaleTransformation *transformation() const;

  protected:
    QwtDoubleInterval align( const QwtDoubleInterval&, double stepSize ) const;

  private:
    void buildTicks( const QwtDoubleInterval &, double stepSize, int maxMinSteps, QwtValueList ticks[ QwtScaleDiv::NTickTypes ] ) const;
    void buildMinorTicks( const QwtValueList& majorTicks, int maxMinMark, double step, QwtValueList &, QwtValueList & ) const;
    QwtValueList buildMajorTicks( const QwtDoubleInterval &interval, double stepSize ) const;

  //================================================================================
  // Members
  //================================================================================
};

#endif