QtiPlot 0.9.7.3
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00001 /*************************************************************************** 00002 File : ReciprocalScaleEngine.h 00003 Project : QtiPlot 00004 -------------------------------------------------------------------- 00005 Copyright : (C) 2009 by Ion Vasilief 00006 Email (use @ for *) : ion_vasilief*yahoo.fr 00007 Description : Return a transformation for reciprocal (1/t) scales 00008 00009 ***************************************************************************/ 00010 00011 /*************************************************************************** 00012 * * 00013 * This program is free software; you can redistribute it and/or modify * 00014 * it under the terms of the GNU General Public License as published by * 00015 * the Free Software Foundation; either version 2 of the License, or * 00016 * (at your option) any later version. * 00017 * * 00018 * This program is distributed in the hope that it will be useful, * 00019 * but WITHOUT ANY WARRANTY; without even the implied warranty of * 00020 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * 00021 * GNU General Public License for more details. * 00022 * * 00023 * You should have received a copy of the GNU General Public License * 00024 * along with this program; if not, write to the Free Software * 00025 * Foundation, Inc., 51 Franklin Street, Fifth Floor, * 00026 * Boston, MA 02110-1301 USA * 00027 * * 00028 ***************************************************************************/ 00029 00030 #ifndef RECIPROCAL_SCALE_ENGINE_H 00031 #define RECIPROCAL_SCALE_ENGINE_H 00032 00033 #include <qwt_scale_engine.h> 00034 #include <qwt_scale_map.h> 00035 #include <ScaleEngine.h> 00036 00037 class ReciprocalScaleTransformation: public ScaleTransformation 00038 { 00039 public: 00040 ReciprocalScaleTransformation(const ScaleEngine *engine):ScaleTransformation(engine){}; 00041 virtual double xForm(double x, double, double, double p1, double p2) const; 00042 virtual double invXForm(double x, double s1, double s2, double p1, double p2) const; 00043 QwtScaleTransformation* copy() const; 00044 }; 00045 00050 class ReciprocalScaleEngine: public QwtScaleEngine 00051 { 00052 public: 00053 virtual void autoScale(int maxSteps, 00054 double &x1, double &x2, double &stepSize) const; 00055 00056 virtual QwtScaleDiv divideScale(double x1, double x2, 00057 int numMajorSteps, int numMinorSteps, 00058 double stepSize = 0.0) const; 00059 00060 virtual QwtScaleTransformation *transformation() const; 00061 00062 protected: 00063 QwtDoubleInterval align(const QwtDoubleInterval&, 00064 double stepSize) const; 00065 00066 private: 00067 void buildTicks( 00068 const QwtDoubleInterval &, double stepSize, int maxMinSteps, 00069 QwtValueList ticks[QwtScaleDiv::NTickTypes]) const; 00070 00071 void buildMinorTicks( 00072 const QwtValueList& majorTicks, 00073 int maxMinMark, double step, 00074 QwtValueList &, QwtValueList &) const; 00075 00076 QwtValueList buildMajorTicks( 00077 const QwtDoubleInterval &interval, double stepSize) const; 00078 }; 00079 00080 #endif