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#pragma once
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#ifndef TUNIT_INCLUDED
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#define TUNIT_INCLUDED
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#include "tcommon.h"
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#undef DVAPI
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#undef DVVAR
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#ifdef TNZBASE_EXPORTS
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#define DVAPI DV_EXPORT_API
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#define DVVAR DV_EXPORT_VAR
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#else
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#define DVAPI DV_IMPORT_API
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#define DVVAR DV_IMPORT_VAR
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#endif
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#ifdef _WIN32
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#pragma warning(push)
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#pragma warning(disable : 4251)
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#endif
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//---------------------------
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class DVAPI TUnitConverter {
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public:
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  virtual ~TUnitConverter() {}
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  virtual TUnitConverter *clone() const      = 0;
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  virtual double convertTo(double v) const   = 0;
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  virtual double convertFrom(double v) const = 0;
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};
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//---------------------------
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class DVAPI TSimpleUnitConverter : public TUnitConverter {
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  const double m_factor, m_offset;
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public:
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  TSimpleUnitConverter(double factor = 1, double offset = 0)
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      : m_factor(factor), m_offset(offset) {}
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  TUnitConverter *clone() const override { return new TSimpleUnitConverter(*this); }
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  double convertTo(double v) const override { return v * m_factor + m_offset; }
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  double convertFrom(double v) const override { return (v - m_offset) / m_factor; }
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};
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//---------------------------
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class DVAPI TUnit {
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  std::wstring m_defaultExtension;
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  std::vector<std::wstring> m_extensions;</std::wstring>
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  TUnitConverter *m_converter;
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public:
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  TUnit(std::wstring ext, TUnitConverter *converter = 0);
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  TUnit(const TUnit &);
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  ~TUnit();
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  TUnit *clone() const { return new TUnit(*this); }
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  const std::vector<std::wstring> &getExtensions() const {</std::wstring>
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    return m_extensions;
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  }
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  void addExtension(std::wstring ext);
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  bool isExtension(std::wstring ext) const;
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  std::wstring getDefaultExtension() const { return m_defaultExtension; }
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  void setDefaultExtension(std::wstring ext);
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  double convertTo(double v) const { return m_converter->convertTo(v); }
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  double convertFrom(double v) const { return m_converter->convertFrom(v); }
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private:
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  // not implemented
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  TUnit &operator=(const TUnit &);
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};
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//---------------------------
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class DVAPI TMeasure {
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  std::string m_name;
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  TUnit *m_mainUnit, *m_currentUnit, *m_standardUnit;
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  std::map<std::wstring, *="" tunit=""> m_extensions;</std::wstring,>
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  double m_defaultValue;
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public:
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  TMeasure(std::string name, TUnit *mainUnit);
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  TMeasure(const TMeasure &);
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  ~TMeasure();
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  std::string getName() const { return m_name; }
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  void setName(std::string name) { m_name = name; }
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  void add(TUnit *unit);
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  // main unit e' quella usata "internamente". puo' essere "strana"
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  const TUnit *getMainUnit() const { return m_mainUnit; }
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  // current unit e' quella ad es. definita in preferences
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  const TUnit *getCurrentUnit() const { return m_currentUnit; }
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  void setCurrentUnit(TUnit *unit);
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  // standard unit e' quella usata nelle espressioni
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  const TUnit *getStandardUnit() const { return m_standardUnit; }
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  void setStandardUnit(TUnit *unit);
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  TUnit *getUnit(std::wstring ext) const;
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  // defaultValue e' espresso in main unit
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  double getDefaultValue() const { return m_defaultValue; }
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  void setDefaultValue(double v) { m_defaultValue = v; }
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private:
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  // not implemented
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  TMeasure &operator=(const TMeasure &);
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};
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//---------------------------
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class DVAPI TMeasureManager {  // singleton
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  std::map<std::string, *="" tmeasure=""> m_measures;</std::string,>
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  TMeasureManager();
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public:
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  static TMeasureManager *instance() {
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    static TMeasureManager _instance;
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    return &_instance;
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  }
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  void add(TMeasure *m);
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  TMeasure *get(std::string name) const;
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  typedef double CameraSizeProvider();
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  void addCameraMeasures(CameraSizeProvider *cameraSizeProvider);
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};
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//---------------------------
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class DVAPI TMeasuredValue {
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  const TMeasure *m_measure;
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  double m_value;
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public:
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  TMeasuredValue(std::string measureName);
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  ~TMeasuredValue();
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  const TMeasure *getMeasure() const { return m_measure; }
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  void setMeasure(const TMeasure *measure);
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  void setMeasure(std::string measureName);
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  enum UnitType { MainUnit, CurrentUnit };
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  double getValue(UnitType uType) const {
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    return uType == MainUnit ? m_value
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                             : m_measure->getCurrentUnit()->convertTo(m_value);
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  }
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  void setValue(UnitType uType, double value) {
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    m_value = uType == MainUnit
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                  ? value
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                  : m_measure->getCurrentUnit()->convertFrom(value);
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  }
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  bool setValue(std::wstring s, int *pErr = 0);  // if pErr != then *pErr
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                                                 // contains error code. *pErr
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                                                 // == 0 means OK
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  std::wstring toWideString(int decimals = 7) const;
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private:
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  // not implemented
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  TMeasuredValue(const TMeasuredValue &);
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  TMeasuredValue &operator=(const TMeasuredValue &);
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};
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//---------------------------
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// bruttacchietto. L'aspect ratio della field guide viene usata nelle
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// conversioni
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// fra fld e inch sulla verticale
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namespace UnitParameters {
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typedef std::pair<double, double=""> (*CurrentDpiGetter)();</double,>
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DVAPI void setFieldGuideAspectRatio(double ar);
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DVAPI double getFieldGuideAspectRatio();
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DVAPI void setCurrentDpiGetter(CurrentDpiGetter f);
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}
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//---------------------------
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#ifdef _WIN32
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#pragma warning(pop)
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#endif
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#endif