File indexing completed on 2024-06-23 04:27:03

 /* This file is part of the KDE project
  * SPDX-FileCopyrightText: 2007 Jan Hambrecht <jaham@gmx.net>
  *
  * SPDX-License-Identifier: LGPL-2.0-or-later
  */
 
 #ifndef KOENHANCEDPATHPARAMETER_H
 #define KOENHANCEDPATHPARAMETER_H
 
 #include <QString>
 
 class EnhancedPathShape;
 
 /// the different possible identifiers, taken from the odf spec
 enum Identifier {
     IdentifierUnknown,   ///< unknown identifier
     IdentifierPi,        ///< value of pi.
     IdentifierLeft,      ///< left of svg:viewBox or draw:coordinate-origin-x
     IdentifierTop,       ///< top of svg:viewBox or draw:coordinate-origin-y
     IdentifierRight,     ///< right of svg:viewBox or draw:coordinate-origin-x + draw:coordinate-width
     IdentifierBottom,    ///< bottom of svg:viewBox or draw:coordinate-origin-y + draw:coordinate-height
     IdentifierXstretch,  ///< The value of draw:path-stretchpoint-x is used.
     IdentifierYstretch,  ///< The value of draw:path-stretchpoint-y is used.
     IdentifierHasStroke, ///< If the shape has a line style, a value of 1 is used.
     IdentifierHasFill,   ///< If the shape has a fill style, a value of 1 is used.
     IdentifierWidth,     ///< The width of the svg:viewBox is used.
     IdentifierHeight,    ///< The height of the svg:viewBox is used.
     IdentifierLogwidth,  ///< The width of the svg:viewBox in 1/100th mm is used.
     IdentifierLogheight  ///< The height of the svg:viewBox in 1/100th mm is used.
 };
 
 /// The abstract parameter class
 class EnhancedPathParameter
 {
 public:
     explicit EnhancedPathParameter(EnhancedPathShape *parent);
     virtual ~EnhancedPathParameter();
     /// evaluates the parameter using the given path
     virtual qreal evaluate() = 0;
     /// modifies the parameter if possible, using the new value
     virtual void modify(qreal value);
     /// returns string representation of the parameter
     virtual QString toString() const = 0;
 protected:
     EnhancedPathShape *parent();
 private:
     EnhancedPathShape *m_parent;
 };
 
 /// A constant parameter, a fixed value (i.e. 5, 11.3, -7)
 class EnhancedPathConstantParameter : public EnhancedPathParameter
 {
 public:
     /// Constructs the constant parameter with the given value
     EnhancedPathConstantParameter(qreal value, EnhancedPathShape *parent);
     qreal evaluate() override;
     QString toString() const override;
 private:
     qreal m_value; ///< the constant value
 };
 
 /// A named parameter, one that refers to a variable of the path
 class EnhancedPathNamedParameter : public EnhancedPathParameter
 {
 public:
     /// Constructs named parameter from given identifier
     EnhancedPathNamedParameter(Identifier identifier, EnhancedPathShape *parent);
     /// Constructs named parameter from given identifier string
     EnhancedPathNamedParameter(const QString &identifier, EnhancedPathShape *parent);
     qreal evaluate() override;
     /// Returns identifier type from given string
     static Identifier identifierFromString(const QString &text);
     QString toString() const override;
 private:
     Identifier m_identifier; ///< the identifier type
 };
 
 /// A referencing parameter, one that references another formula or a modifier
 class EnhancedPathReferenceParameter : public EnhancedPathParameter
 {
 public:
     /// Constructs reference parameter from the given reference string
     explicit EnhancedPathReferenceParameter(const QString &reference, EnhancedPathShape *parent);
     qreal evaluate() override;
     void modify(qreal value) override;
     QString toString() const override;
 private:
     QString m_reference; ///< the reference, formula or modifier
 };
 
 #endif // KOENHANCEDPATHPARAMETER_H