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52 lines
1.4 KiB
52 lines
1.4 KiB
13 years ago
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#ifndef __qwt3d_autoscaler_2003_08_18_12_05__
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#define __qwt3d_autoscaler_2003_08_18_12_05__
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#include <vector>
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#include "qwt3d_global.h"
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#include "qwt3d_autoptr.h"
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namespace Qwt3D
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{
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//! ABC for autoscaler
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class QWT3D_EXPORT AutoScaler
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{
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friend class qwt3d_ptr<AutoScaler>;
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protected:
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//! Returns a new heap based object of the derived class.
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virtual AutoScaler* clone() const = 0;
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//! To implement from subclasses
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virtual int execute(double& a, double& b, double start, double stop, int ivals) = 0;
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virtual ~AutoScaler(){}
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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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//! Automatic beautifying of linear scales
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class QWT3D_EXPORT LinearAutoScaler : public AutoScaler
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{
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friend class LinearScale;
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protected:
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LinearAutoScaler();
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explicit LinearAutoScaler(std::vector<double>& mantisses);
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//! Returns a new heap based object utilized from qwt3d_ptr
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AutoScaler* clone() const {return new LinearAutoScaler(*this);}
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int execute(double& a, double& b, double start, double stop, int ivals);
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private:
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double start_, stop_;
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int intervals_;
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void init(double start, double stop, int ivals);
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double anchorvalue(double start, double mantisse, int exponent);
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int segments(int& l_intervals, int& r_intervals, double start, double stop, double anchor, double mantissa, int exponent);
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std::vector<double> mantissi_;
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};
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} // ns
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#endif
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