You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
89 lines
2.2 KiB
89 lines
2.2 KiB
15 years ago
|
/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
|
||
|
|
* Qwt Widget Library
|
||
|
|
* Copyright (C) 1997 Josef Wilgen
|
||
|
|
* Copyright (C) 2002 Uwe Rathmann
|
||
14 years ago
|
*
|
||
|
15 years ago
|
* This library is free software; you can redistribute it and/or
|
||
|
|
* modify it under the terms of the Qwt License, Version 1.0
|
||
|
|
*****************************************************************************/
|
||
|
|
|
||
|
|
#ifndef QWT_DOUBLE_RANGE_H
|
||
|
|
#define QWT_DOUBLE_RANGE_H
|
||
|
|
|
||
|
|
#include "qwt_global.h"
|
||
|
|
|
||
|
|
/*!
|
||
|
|
\brief A class which controls a value within an interval
|
||
|
|
|
||
|
|
This class is useful as a base class or a member for sliders.
|
||
|
|
It represents an interval of type double within which a value can
|
||
|
14 years ago
|
be moved. The value can be either an arbitrary point inside
|
||
|
15 years ago
|
the interval (see QwtDoubleRange::setValue), or it can be fitted
|
||
|
|
into a step raster (see QwtDoubleRange::fitValue and
|
||
|
|
QwtDoubleRange::incValue).
|
||
|
|
|
||
|
|
As a special case, a QwtDoubleRange can be periodic, which means that
|
||
|
|
a value outside the interval will be mapped to a value inside the
|
||
|
14 years ago
|
interval when QwtDoubleRange::setValue(), QwtDoubleRange::fitValue(),
|
||
|
15 years ago
|
QwtDoubleRange::incValue() or QwtDoubleRange::incPages() are called.
|
||
|
|
*/
|
||
|
|
|
||
|
|
class QWT_EXPORT QwtDoubleRange
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
QwtDoubleRange();
|
||
|
|
virtual ~QwtDoubleRange();
|
||
|
|
|
||
|
|
void setRange(double vmin, double vmax, double vstep = 0.0,
|
||
|
14 years ago
|
int pagesize = 1);
|
||
|
15 years ago
|
|
||
|
|
void setValid(bool);
|
||
|
|
bool isValid() const;
|
||
|
|
|
||
|
|
virtual void setValue(double);
|
||
|
|
double value() const;
|
||
|
|
|
||
|
|
void setPeriodic(bool tf);
|
||
|
|
bool periodic() const;
|
||
|
|
|
||
|
|
void setStep(double);
|
||
|
|
double step() const;
|
||
|
|
|
||
|
|
double maxValue() const;
|
||
|
14 years ago
|
double minValue() const;
|
||
|
15 years ago
|
|
||
|
|
int pageSize() const;
|
||
|
|
|
||
|
|
virtual void incValue(int);
|
||
|
|
virtual void incPages(int);
|
||
|
|
virtual void fitValue(double);
|
||
|
|
|
||
|
|
protected:
|
||
|
|
|
||
|
|
double exactValue() const;
|
||
|
|
double exactPrevValue() const;
|
||
|
|
double prevValue() const;
|
||
|
|
|
||
|
|
virtual void valueChange();
|
||
|
|
virtual void stepChange();
|
||
|
|
virtual void rangeChange();
|
||
|
|
|
||
|
|
private:
|
||
|
|
void setNewValue(double x, bool align = false);
|
||
|
|
|
||
|
|
double d_minValue;
|
||
|
|
double d_maxValue;
|
||
|
|
double d_step;
|
||
|
|
int d_pageSize;
|
||
|
|
|
||
|
|
bool d_isValid;
|
||
|
|
double d_value;
|
||
|
|
double d_exactValue;
|
||
|
|
double d_exactPrevValue;
|
||
|
|
double d_prevValue;
|
||
|
|
|
||
|
|
bool d_periodic;
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif
|