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/* This file is part of the KDE project
* Copyright (C) 2007 Jan Hambrecht <jaham@gmx.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#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 bstract 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
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