1 | #ifndef qwt3d_scale_h__2004_06_02_22_02_begin_guarded_code
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2 | #define qwt3d_scale_h__2004_06_02_22_02_begin_guarded_code
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3 |
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4 | #include <qstring.h>
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5 | #include "qwt3d_types.h"
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6 | #include "qwt3d_autoscaler.h"
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7 | #include "qwt3d_autoptr.h"
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8 |
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9 | namespace Qwt3D
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10 | {
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11 |
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12 | /*!
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13 | The class encapsulates non-visual scales.
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14 | She is utilized by Axis and also collaborates closely with AutoScaler.
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15 | A Scale allows control over all aspects of tic generation including
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16 | arbitrary transformations of tic values into corresponding strings.
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17 | The strings contain what eventually will be shown as tic labels.\n
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18 | Standard linear and logarithmic scales have been integrated yet into the Axis
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19 | interface. User-defined axes can be derived from Scale, LinearScale et al.
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20 | */
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21 | class QWT3D_EXPORT Scale
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22 | {
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23 | friend class Axis;
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24 | friend class qwt3d_ptr<Scale>;
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25 |
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26 | protected:
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27 | Scale();
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28 | virtual ~Scale(){}
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29 | virtual QString ticLabel(unsigned int idx) const;
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30 |
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31 | virtual void setLimits(double start, double stop);
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32 | virtual void setMajors(int val) {majorintervals_p=val;} //!< Sets number of major intervals
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33 | virtual void setMinors(int val) {minorintervals_p=val;} //!< Sets number of minor intervals per major interval
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34 | virtual void setMajorLimits(double start, double stop);
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35 |
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36 | int majors() const {return majorintervals_p;} //!< Returns major intervals
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37 | int minors() const {return minorintervals_p;} //!< Returns minor intervals
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38 |
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39 | //! Derived classes should return a new heap based object here.
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40 | virtual Scale* clone() const = 0;
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41 | //! This function should setup the 2 vectors for major and minor positions;
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42 | virtual void calculate() = 0;
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43 | virtual int autoscale(double& a, double& b, double start, double stop, int ivals);
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44 |
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45 | std::vector<double> majors_p, minors_p;
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46 | double start_p, stop_p;
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47 | int majorintervals_p, minorintervals_p;
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48 | double mstart_p, mstop_p;
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49 |
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50 | private:
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51 | void destroy() const {delete this;} //!< Used by qwt3d_ptr
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52 | };
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53 |
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54 | //! The standard (1:1) mapping class for axis numbering
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55 | class QWT3D_EXPORT LinearScale : public Scale
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56 | {
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57 | friend class Axis;
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58 | friend class qwt3d_ptr<Scale>;
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59 | protected:
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60 | int autoscale(double& a, double& b, double start, double stop, int ivals);
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61 | //! Returns a new heap based object utilized from qwt3d_ptr
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62 | Scale* clone() const {return new LinearScale(*this);}
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63 | void calculate();
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64 | LinearAutoScaler autoscaler_p;
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65 | };
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66 |
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67 | //! log10 scale
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68 | class QWT3D_EXPORT LogScale : public Scale
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69 | {
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70 | friend class Axis;
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71 | friend class qwt3d_ptr<Scale>;
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72 | protected:
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73 | QString ticLabel(unsigned int idx) const;
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74 | void setMinors(int val);
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75 | //! Standard ctor
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76 | LogScale();
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77 | //! Returns a new heap based object utilized from qwt3d_ptr
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78 | Scale* clone() const {return new LogScale;}
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79 | void calculate();
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80 | private:
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81 | void setupCounter(double& k, int& step);
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82 | };
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83 |
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84 | } // namespace Qwt3D
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85 |
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86 |
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87 | #endif /* include guarded */
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