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SVGAngle.h

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00001 /*
00002     Copyright (C) 2004, 2005, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
00003                   2004, 2005, 2006 Rob Buis <buis@kde.org>
00004 
00005     This file is part of the KDE project
00006 
00007     This library is free software; you can redistribute it and/or
00008     modify it under the terms of the GNU Library General Public
00009     License as published by the Free Software Foundation; either
00010     version 2 of the License, or (at your option) any later version.
00011 
00012     This library is distributed in the hope that it will be useful,
00013     but WITHOUT ANY WARRANTY; without even the implied warranty of
00014     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00015     Library General Public License for more details.
00016 
00017     You should have received a copy of the GNU Library General Public License
00018     along with this library; see the file COPYING.LIB.  If not, write to
00019     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00020     Boston, MA 02110-1301, USA.
00021 */
00022 
00023 #ifndef SVGAngle_h
00024 #define SVGAngle_h
00025 
00026 #if ENABLE(SVG)
00027 //#include "PlatformString.h"
00028 #include "wtf/RefCounted.h"
00029 #include "SVGNames.h"
00030 
00031 namespace WebCore {
00032 
00033     class SVGStyledElement;
00034 
00035     class SVGAngle : public RefCounted<SVGAngle> {
00036     public:
00037         SVGAngle();
00038         virtual ~SVGAngle();
00039         
00040         enum SVGAngleType {
00041             SVG_ANGLETYPE_UNKNOWN           = 0,
00042             SVG_ANGLETYPE_UNSPECIFIED       = 1,
00043             SVG_ANGLETYPE_DEG               = 2,
00044             SVG_ANGLETYPE_RAD               = 3,
00045             SVG_ANGLETYPE_GRAD              = 4
00046         };
00047 
00048         SVGAngleType unitType() const;
00049 
00050         void setValue(float);
00051         float value() const; 
00052 
00053         void setValueInSpecifiedUnits(float valueInSpecifiedUnits);
00054         float valueInSpecifiedUnits() const;
00055 
00056         void setValueAsString(const String&);
00057         String valueAsString() const;
00058 
00059         void newValueSpecifiedUnits(unsigned short unitType, float valueInSpecifiedUnits);
00060         void convertToSpecifiedUnits(unsigned short unitType);
00061 
00062         // Helpers
00063         static double todeg(double rad);
00064         static double torad(double deg);
00065 
00066         // Returns the angle that divides the shortest arc between the two angles.
00067         static double shortestArcBisector(double angle1, double angle2);
00068 
00069         // Throughout SVG 1.1 'SVGAngle' is only used for 'SVGMarkerElement' (orient-angle)
00070         const QualifiedName& associatedAttributeName() const { return SVGNames::orientAttr; }
00071 
00072     private:
00073         SVGAngleType m_unitType;
00074         float m_value;
00075         float m_valueInSpecifiedUnits;
00076         mutable String m_valueAsString;
00077 
00078         void calculate();
00079     };
00080 
00081 } // namespace WebCore
00082 
00083 #endif // ENABLE(SVG)
00084 #endif // SVGAngle_h

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