Qwt User's Guide 6.0.2

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qwt_double_range.h
1 /* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
2 * Qwt Widget Library
3 * Copyright (C) 1997 Josef Wilgen
4 * Copyright (C) 2002 Uwe Rathmann
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the Qwt License, Version 1.0
8 *****************************************************************************/
9
10 #ifndef QWT_DOUBLE_RANGE_H
11 #define QWT_DOUBLE_RANGE_H
12
13 #include "qwt_global.h"
14
31 class QWT_EXPORT QwtDoubleRange
32 {
33 public:
34 QwtDoubleRange();
35 virtual ~QwtDoubleRange();
36
37 void setRange( double vmin, double vmax,
38 double vstep = 0.0, int pagesize = 1 );
39
40 void setValid( bool );
41 bool isValid() const;
42
43 virtual void setValue( double );
44 double value() const;
45
46 void setPeriodic( bool tf );
47 bool periodic() const;
48
49 void setStep( double );
50 double step() const;
51
52 double maxValue() const;
53 double minValue() const;
54
55 int pageSize() const;
56
57 virtual void incValue( int );
58 virtual void incPages( int );
59 virtual void fitValue( double );
60
61 protected:
62
63 double exactValue() const;
64 double exactPrevValue() const;
65 double prevValue() const;
66
67 virtual void valueChange();
68 virtual void stepChange();
69 virtual void rangeChange();
70
71 private:
72 void setNewValue( double value, bool align = false );
73
74 class PrivateData;
75 PrivateData *d_data;
76 };
77
78 #endif