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88 lines
2.8 KiB
88 lines
2.8 KiB
13 years ago
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#ifndef qwt3d_scale_h__2004_06_02_22_02_begin_guarded_code
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#define qwt3d_scale_h__2004_06_02_22_02_begin_guarded_code
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#include <qstring.h>
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#include "qwt3d_types.h"
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#include "qwt3d_autoscaler.h"
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#include "qwt3d_autoptr.h"
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namespace Qwt3D
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{
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/*!
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The class encapsulates non-visual scales.
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She is utilized by Axis and also collaborates closely with AutoScaler.
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A Scale allows control over all aspects of tic generation including
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arbitrary transformations of tic values into corresponding strings.
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The strings contain what eventually will be shown as tic labels.\n
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Standard linear and logarithmic scales have been integrated yet into the Axis
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interface. User-defined axes can be derived from Scale, LinearScale et al.
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*/
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class QWT3D_EXPORT Scale
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{
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friend class Axis;
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friend class qwt3d_ptr<Scale>;
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protected:
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Scale();
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virtual ~Scale(){}
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virtual QString ticLabel(unsigned int idx) const;
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virtual void setLimits(double start, double stop);
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virtual void setMajors(int val) {majorintervals_p=val;} //!< Sets number of major intervals
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virtual void setMinors(int val) {minorintervals_p=val;} //!< Sets number of minor intervals per major interval
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virtual void setMajorLimits(double start, double stop);
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int majors() const {return majorintervals_p;} //!< Returns major intervals
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int minors() const {return minorintervals_p;} //!< Returns minor intervals
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//! Derived classes should return a new heap based object here.
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virtual Scale* clone() const = 0;
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//! This function should setup the 2 vectors for major and minor positions;
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virtual void calculate() = 0;
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virtual int autoscale(double& a, double& b, double start, double stop, int ivals);
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std::vector<double> majors_p, minors_p;
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double start_p, stop_p;
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int majorintervals_p, minorintervals_p;
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double mstart_p, mstop_p;
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private:
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void destroy() const {delete this;} //!< Used by qwt3d_ptr
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};
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//! The standard (1:1) mapping class for axis numbering
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class QWT3D_EXPORT LinearScale : public Scale
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{
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friend class Axis;
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friend class qwt3d_ptr<Scale>;
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protected:
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int autoscale(double& a, double& b, double start, double stop, int ivals);
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//! Returns a new heap based object utilized from qwt3d_ptr
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Scale* clone() const {return new LinearScale(*this);}
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void calculate();
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LinearAutoScaler autoscaler_p;
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};
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//! log10 scale
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class QWT3D_EXPORT LogScale : public Scale
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{
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friend class Axis;
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friend class qwt3d_ptr<Scale>;
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protected:
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QString ticLabel(unsigned int idx) const;
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void setMinors(int val);
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//! Standard ctor
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LogScale();
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//! Returns a new heap based object utilized from qwt3d_ptr
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Scale* clone() const {return new LogScale;}
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void calculate();
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private:
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void setupCounter(double& k, int& step);
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};
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} // namespace Qwt3D
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#endif /* include guarded */
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