paraview-dev 4.0.1-1ubuntu1 / usr / include / paraview / pqChartValue.h

/*=========================================================================

   Program: ParaView
   Module:    pqChartValue.h

   Copyright (c) 2005-2008 Sandia Corporation, Kitware Inc.
   All rights reserved.

   ParaView is a free software; you can redistribute it and/or modify it
   under the terms of the ParaView license version 1.2. 

   See License_v1.2.txt for the full ParaView license.
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/*!
 * \file pqChartValue.h
 *
 * \brief
 *   The pqChartValue class is used to store a number that can be
 *   one of three types: int, float, or double.
 *
 * \author Mark Richardson
 * \date   May 10, 2005
 */

#ifndef _pqChartValue_h
#define _pqChartValue_h

#include "pqComponentsModule.h"
#include <QString> // Needed for QString return type.


/// \class pqChartValue
/// \brief
///   The pqChartValue class is used to store a number that can be
///   one of three types: int, float, or double.
///
/// This union of numeric types allows a chart to handle numeric data
/// of different types without using a template. All the operators
/// make it simple to use values of different types because the
/// conversion is done under the covers. The increment and decrement
/// operators are implemented using the machine floating point epsilon
/// for non-integer types, which is useful when doing boolean operations
/// on selection ranges.
class PQCOMPONENTS_EXPORT pqChartValue
{
public:
  enum ValueType {
    IntValue,
    FloatValue,
    DoubleValue
  };

  enum NotationType {
    Standard = 0,
    Exponential,
    Engineering,
    StandardOrExponential
  };

public:
  /// \brief
  ///   Creates a chart value object.
  ///
  /// The value created is an integer type with a value of zero.
  pqChartValue();

  /// \brief
  ///   Used to copy another chart value.
  /// \param value The value to store.
  pqChartValue(const pqChartValue &value);

  /// \brief
  ///   Creates a chart value to store an integer.
  /// \param value The value to store.
  pqChartValue(int value);

  /// \brief
  ///   Creates a chart value to store a float.
  /// \param value The value to store.
  pqChartValue(float value);

  /// \brief
  ///   Creates a chart value to store a float.
  /// \param value The value to store.
  pqChartValue(double value);
  ~pqChartValue();

  /// \brief
  ///   Gets the type of value stored.
  /// \return
  ///   The type of value stored.
  ValueType getType() const {return this->Type;}

  /// \brief
  ///   Converts the value stored to the specified type.
  /// \param type The type to cast the value to.
  void convertTo(ValueType type);

  /// \brief
  ///   Stores an integer value.
  /// \param value The value to store.
  void setValue(int value);

  /// \brief
  ///   Stores a float value.
  /// \param value The value to store.
  void setValue(float value);

  /// \brief
  ///   Stores a double value.
  /// \param value The value to store.
  void setValue(double value);

  /// \brief
  ///   Gets the value as an integer.
  ///
  /// If the value stored is not an integer, it will be cast
  /// to one.
  ///
  /// \return
  ///   The value as an integer.
  int getIntValue() const;

  /// \brief
  ///   Gets the value as a float.
  ///
  /// If the value stored is not a float, it will be cast
  /// to one.
  ///
  /// \return
  ///   The value as a float.
  float getFloatValue() const;

  /// \brief
  ///   Gets the value as a double.
  ///
  /// If the value stored is not a double, it will be cast
  /// to one.
  ///
  /// \return
  ///   The value as a double.
  double getDoubleValue() const;

  /// \brief
  ///   Gets a string representation of the value.
  ///
  /// If the value is a floating point type, the precision
  /// will determine how many decimal places will be printed.
  /// The number will be printed in exponential notation if
  /// it is shorter.
  ///
  /// \param precision The floating point precision.
  /// \param notation The notation used to represent the value.
  /// \return
  ///   A string representation of the value.
  QString getString(int precision=2,
      NotationType notation=pqChartValue::StandardOrExponential) const;

  /// \name Operators
  //@{
  /// Assigns the value from another chart value.
  pqChartValue &operator=(const pqChartValue &value);

  /// Assigns the value from an integer.
  pqChartValue &operator=(int value);

  /// Assigns the value from a float.
  pqChartValue &operator=(float value);

  /// Assigns the value from a double.
  pqChartValue &operator=(double value);

  /// Casts the value to an integer.
  operator int() const {return getIntValue();}

  /// Casts the value to a float.
  operator float() const {return getFloatValue();}

  /// Casts the value to a double.
  operator double() const {return getDoubleValue();}

  /// \brief
  ///   Increments the value.
  ///
  /// If the value is not an integer type, the value is increased
  /// by the machine epsilon for the type.
  pqChartValue &operator++();

  /// \brief
  ///   Post-increments the value.
  ///
  /// If the value is not an integer type, the value is increased
  /// by the machine epsilon for the type.
  ///
  /// \param post A placeholder to determine the operator.
  pqChartValue operator++(int post);

  /// \brief
  ///   Decrements the value.
  ///
  /// If the value is not an integer type, the value is decreased
  /// by the machine epsilon for the type.
  pqChartValue &operator--();

  /// \brief
  ///   Post-decrements the value.
  ///
  /// If the value is not an integer type, the value is decreased
  /// by the machine epsilon for the type.
  ///
  /// \param post A placeholder to determine the operator.
  pqChartValue operator--(int post);

  /// Adds two chart values.
  pqChartValue operator+(const pqChartValue &value) const;

  /// Adds a chart value and an integer.
  pqChartValue operator+(int value) const;

  /// Adds a chart value and a float.
  pqChartValue operator+(float value) const;

  /// Adds a chart value and a double.
  pqChartValue operator+(double value) const;

  /// Subtracts two chart values.
  pqChartValue operator-(const pqChartValue &value) const;

  /// Subtracts a chart value and an integer.
  pqChartValue operator-(int value) const;

  /// Subtracts a chart value and a float.
  pqChartValue operator-(float value) const;

  /// Subtracts a chart value and a double.
  pqChartValue operator-(double value) const;

  /// Multiplies two chart values.
  pqChartValue operator*(const pqChartValue &value) const;

  /// Multiplies a chart value and an integer.
  pqChartValue operator*(int value) const;

  /// Multiplies a chart value and a float.
  pqChartValue operator*(float value) const;

  /// Multiplies a chart value and a double.
  pqChartValue operator*(double value) const;

  /// Divides two chart values.
  pqChartValue operator/(const pqChartValue &value) const;

  /// Divides a chart value and an integer.
  pqChartValue operator/(int value) const;

  /// Divides a chart value and a float.
  pqChartValue operator/(float value) const;

  /// Divides a chart value and a double.
  pqChartValue operator/(double value) const;

  /// Adds another value to this one and stores the result.
  pqChartValue &operator+=(const pqChartValue &value);

  /// Adds an integer to this value and stores the result.
  pqChartValue &operator+=(int value);

  /// Adds a float to this value and stores the result.
  pqChartValue &operator+=(float value);

  /// Adds a double to this value and stores the result.
  pqChartValue &operator+=(double value);

  /// Subtracts another value from this one and stores the result.
  pqChartValue &operator-=(const pqChartValue &value);

  /// Subtracts an integer from this value and stores the result.
  pqChartValue &operator-=(int value);

  /// Subtracts a float from this value and stores the result.
  pqChartValue &operator-=(float value);

  /// Subtracts a double from this value and stores the result.
  pqChartValue &operator-=(double value);

  /// Multiplies this value by another and stores the result.
  pqChartValue &operator*=(const pqChartValue &value);

  /// Multiplies this value by an integer and stores the result.
  pqChartValue &operator*=(int value);

  /// Multiplies this value by a float and stores the result.
  pqChartValue &operator*=(float value);

  /// Multiplies this value by a double and stores the result.
  pqChartValue &operator*=(double value);

  /// Divides this value by another and stores the result.
  pqChartValue &operator/=(const pqChartValue &value);

  /// Divides this value by an integer and stores the result.
  pqChartValue &operator/=(int value);

  /// Divides this value by a float and stores the result.
  pqChartValue &operator/=(float value);

  /// Divides this value by a double and stores the result.
  pqChartValue &operator/=(double value);

  /// Compares this chart value to another one.
  bool operator==(const pqChartValue &value) const;

  /// Compares this chart value to an integer.
  bool operator==(int value) const;

  /// Compares this chart value to a float.
  bool operator==(float value) const;

  /// Compares this chart value to a double.
  bool operator==(double value) const;

  /// Compares this chart value to another one.
  bool operator!=(const pqChartValue &value) const;

  /// Compares this chart value to an integer.
  bool operator!=(int value) const;

  /// Compares this chart value to a float.
  bool operator!=(float value) const;

  /// Compares this chart value to a double.
  bool operator!=(double value) const;

  /// Compares this chart value to another one.
  bool operator>(const pqChartValue &value) const;

  /// Compares this chart value to an integer.
  bool operator>(int value) const;

  /// Compares this chart value to a float.
  bool operator>(float value) const;

  /// Compares this chart value to a double.
  bool operator>(double value) const;

  /// Compares this chart value to another one.
  bool operator<(const pqChartValue &value) const;

  /// Compares this chart value to an integer.
  bool operator<(int value) const;

  /// Compares this chart value to a float.
  bool operator<(float value) const;

  /// Compares this chart value to a double.
  bool operator<(double value) const;

  /// Compares this chart value to another one.
  bool operator>=(const pqChartValue &value) const;

  /// Compares this chart value to an integer.
  bool operator>=(int value) const;

  /// Compares this chart value to a float.
  bool operator>=(float value) const;

  /// Compares this chart value to a double.
  bool operator>=(double value) const;

  /// Compares this chart value to another one.
  bool operator<=(const pqChartValue &value) const;

  /// Compares this chart value to an integer.
  bool operator<=(int value) const;

  /// Compares this chart value to a float.
  bool operator<=(float value) const;

  /// Compares this chart value to a double.
  bool operator<=(double value) const;
  //@}

private:
  ValueType Type; ///< Stores the value type.
  union {
    int Int;
    float Float;
    double Double;
  } Value; ///< Stores the value as an int, float, or double.
};


/// \relates pqChartValue
/// \brief
///   Adds an integer and a chart value object.
PQCOMPONENTS_EXPORT int operator+(int value1, const pqChartValue &value2);

/// \relates pqChartValue
/// \brief
///   Adds a float and a chart value object.
PQCOMPONENTS_EXPORT float operator+(float value1, const pqChartValue &value2);

/// \relates pqChartValue
/// \brief
///   Adds a double and a chart value object.
PQCOMPONENTS_EXPORT double operator+(double value1, const pqChartValue &value2);

/// \relates pqChartValue
/// \brief
///   Subtracts an integer and a chart value object.
PQCOMPONENTS_EXPORT int operator-(int value1, const pqChartValue &value2);

/// \relates pqChartValue
/// \brief
///   Subtracts a float and a chart value object.
PQCOMPONENTS_EXPORT float operator-(float value1, const pqChartValue &value2);

/// \relates pqChartValue
/// \brief
///   Subtracts a double and a chart value object.
PQCOMPONENTS_EXPORT double operator-(double value1, const pqChartValue &value2);

/// \relates pqChartValue
/// \brief
///   Multiplies an integer and a chart value object.
PQCOMPONENTS_EXPORT int operator*(int value1, const pqChartValue &value2);

/// \relates pqChartValue
/// \brief
///   Multiplies a float and a chart value object.
PQCOMPONENTS_EXPORT float operator*(float value1, const pqChartValue &value2);

/// \relates pqChartValue
/// \brief
///   Multiplies a double and a chart value object.
PQCOMPONENTS_EXPORT double operator*(double value1, const pqChartValue &value2);

/// \relates pqChartValue
/// \brief
///   Divides an integer and a chart value object.
PQCOMPONENTS_EXPORT int operator/(int value1, const pqChartValue &value2);

/// \relates pqChartValue
/// \brief
///   Divides a float and a chart value object.
PQCOMPONENTS_EXPORT float operator/(float value1, const pqChartValue &value2);

/// \relates pqChartValue
/// \brief
///   Divides a double and a chart value object.
PQCOMPONENTS_EXPORT double operator/(double value1, const pqChartValue &value2);

/// \relates pqChartValue
/// \brief
///   Compares an integer and a chart value object.
PQCOMPONENTS_EXPORT bool operator==(int value1, const pqChartValue &value2);

/// \relates pqChartValue
/// \brief
///   Compares a float and a chart value object.
PQCOMPONENTS_EXPORT bool operator==(float value1, const pqChartValue &value2);

/// \relates pqChartValue
/// \brief
///   Compares a double and a chart value object.
PQCOMPONENTS_EXPORT bool operator==(double value1, const pqChartValue &value2);

/// \relates pqChartValue
/// \brief
///   Compares an integer and a chart value object.
PQCOMPONENTS_EXPORT bool operator!=(int value1, const pqChartValue &value2);

/// \relates pqChartValue
/// \brief
///   Compares a float and a chart value object.
PQCOMPONENTS_EXPORT bool operator!=(float value1, const pqChartValue &value2);

/// \relates pqChartValue
/// \brief
///   Compares a double and a chart value object.
PQCOMPONENTS_EXPORT bool operator!=(double value1, const pqChartValue &value2);

/// \relates pqChartValue
/// \brief
///   Compares an integer and a chart value object.
PQCOMPONENTS_EXPORT bool operator>(int value1, const pqChartValue &value2);

/// \relates pqChartValue
/// \brief
///   Compares a float and a chart value object.
PQCOMPONENTS_EXPORT bool operator>(float value1, const pqChartValue &value2);

/// \relates pqChartValue
/// \brief
///   Compares a double and a chart value object.
PQCOMPONENTS_EXPORT bool operator>(double value1, const pqChartValue &value2);

/// \relates pqChartValue
/// \brief
///   Compares an integer and a chart value object.
PQCOMPONENTS_EXPORT bool operator<(int value1, const pqChartValue &value2);

/// \relates pqChartValue
/// \brief
///   Compares a float and a chart value object.
PQCOMPONENTS_EXPORT bool operator<(float value1, const pqChartValue &value2);

/// \relates pqChartValue
/// \brief
///   Compares a double and a chart value object.
PQCOMPONENTS_EXPORT bool operator<(double value1, const pqChartValue &value2);

/// \relates pqChartValue
/// \brief
///   Compares an integer and a chart value object.
PQCOMPONENTS_EXPORT bool operator>=(int value1, const pqChartValue &value2);

/// \relates pqChartValue
/// \brief
///   Compares a float and a chart value object.
PQCOMPONENTS_EXPORT bool operator>=(float value1, const pqChartValue &value2);

/// \relates pqChartValue
/// \brief
///   Compares a double and a chart value object.
PQCOMPONENTS_EXPORT bool operator>=(double value1, const pqChartValue &value2);

/// \relates pqChartValue
/// \brief
///   Compares an integer and a chart value object.
PQCOMPONENTS_EXPORT bool operator<=(int value1, const pqChartValue &value2);

/// \relates pqChartValue
/// \brief
///   Compares a float and a chart value object.
PQCOMPONENTS_EXPORT bool operator<=(float value1, const pqChartValue &value2);

/// \relates pqChartValue
/// \brief
///   Compares a double and a chart value object.
PQCOMPONENTS_EXPORT bool operator<=(double value1, const pqChartValue &value2);

#endif