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/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
* Qwt Widget Library
* Copyright (C) 1997 Josef Wilgen
* Copyright (C) 2002 Uwe Rathmann
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the Qwt License, Version 1.0
*****************************************************************************/
#include "qwt_math.h"
#include "qwt_interval_data.h"
QwtIntervalData::QwtIntervalData()
{
}
QwtIntervalData::QwtIntervalData(
const QwtArray<QwtDoubleInterval> &intervals,
const QwtArray<double> &values):
d_intervals(intervals),
d_values(values)
{
}
void QwtIntervalData::setData(
const QwtArray<QwtDoubleInterval> &intervals,
const QwtArray<double> &values)
{
d_intervals = intervals;
d_values = values;
}
QwtDoubleRect QwtIntervalData::boundingRect() const
{
double minX, maxX, minY, maxY;
minX = maxX = minY = maxY = 0.0;
bool isValid = false;
const size_t sz = size();
for ( size_t i = 0; i < sz; i++ ) {
const QwtDoubleInterval intv = interval(i);
if ( !intv.isValid() )
continue;
const double v = value(i);
if ( !isValid ) {
minX = intv.minValue();
maxX = intv.maxValue();
minY = maxY = v;
isValid = true;
} else {
if ( intv.minValue() < minX )
minX = intv.minValue();
if ( intv.maxValue() > maxX )
maxX = intv.maxValue();
if ( v < minY )
minY = v;
if ( v > maxY )
maxY = v;
}
}
if ( !isValid )
return QwtDoubleRect(1.0, 1.0, -2.0, -2.0); // invalid
return QwtDoubleRect(minX, minY, maxX - minX, maxY - minY);
}