Qwt User's Guide: qwt_scale_div.cpp Source File

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# qwt_scale_div.cpp

    00001 /* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
    00002  * Qwt Widget Library
    00003  * Copyright (C) 1997   Josef Wilgen
    00004  * Copyright (C) 2002   Uwe Rathmann
    00005  *
    00006  * This library is free software; you can redistribute it and/or
    00007  * modify it under the terms of the Qwt License, Version 1.0
    00008  *****************************************************************************/
    00009
    00010 #include "qwt_scale_div.h"
    00011 #include "qwt_math.h"
    00012 #include "qwt_double_interval.h"
    00013
    00015 QwtScaleDiv::QwtScaleDiv():
    00016     d_lBound(0.0),
    00017     d_hBound(0.0),
    00018     d_isValid(false)
    00019 {
    00020 }
    00021
    00028 QwtScaleDiv::QwtScaleDiv(
    00029         const QwtDoubleInterval &interval,
    00030         QwtValueList ticks[NTickTypes]):
    00031     d_lBound(interval.minValue()),
    00032     d_hBound(interval.maxValue()),
    00033     d_isValid(true)
    00034 {
    00035     for ( int i = 0; i < NTickTypes; i++ )
    00036         d_ticks[i] = ticks[i];
    00037 }
    00038
    00046 QwtScaleDiv::QwtScaleDiv(
    00047         double lBound, double hBound,
    00048         QwtValueList ticks[NTickTypes]):
    00049     d_lBound(lBound),
    00050     d_hBound(hBound),
    00051     d_isValid(true)
    00052 {
    00053     for ( int i = 0; i < NTickTypes; i++ )
    00054         d_ticks[i] = ticks[i];
    00055 }
    00056
    00061 int QwtScaleDiv::operator==(const QwtScaleDiv &other) const
    00062 {
    00063     if ( d_lBound != other.d_lBound ||
    00064         d_hBound != other.d_hBound ||
    00065         d_isValid != other.d_isValid )
    00066     {
    00067         return false;
    00068     }
    00069
    00070     for ( int i = 0; i < NTickTypes; i++ )
    00071     {
    00072         if ( d_ticks[i] != other.d_ticks[i] )
    00073             return false;
    00074     }
    00075
    00076     return true;
    00077 }
    00078
    00083 int QwtScaleDiv::operator!=(const QwtScaleDiv &s) const
    00084 {
    00085     return (!(*this == s));
    00086 }
    00087
    00089 void QwtScaleDiv::invalidate()
    00090 {
    00091     d_isValid = false;
    00092
    00093     // detach arrays
    00094     for ( int i = 0; i < NTickTypes; i++ )
    00095         d_ticks[i].clear();
    00096
    00097     d_lBound = d_hBound = 0;
    00098 }
    00099
    00101 bool QwtScaleDiv::isValid() const
    00102 {
    00103     return d_isValid;
    00104 }
    00105
    00106 bool QwtScaleDiv::contains(double v) const
    00107 {
    00108     if ( !d_isValid )
    00109         return false;
    00110
    00111     const double min = qwtMin(d_lBound, d_hBound);
    00112     const double max = qwtMax(d_lBound, d_hBound);
    00113
    00114     return v >= min && v <= max;
    00115 }
    00116
    00118 void QwtScaleDiv::invert()
    00119 {
    00120     qSwap(d_lBound, d_hBound);
    00121
    00122     for ( int i = 0; i < NTickTypes; i++ )
    00123     {
    00124         QwtValueList& ticks = d_ticks[i];
    00125
    00126         const int size = ticks.count();
    00127         const int size2 = size / 2;
    00128
    00129         for (int i=0; i < size2; i++)
    00130             qSwap(ticks[i], ticks[size - 1 - i]);
    00131     }
    00132 }
    00133
    00139 const QwtValueList &QwtScaleDiv::ticks(int type) const
    00140 {
    00141     if ( type >= 0 || type < NTickTypes )
    00142         return d_ticks[type];
    00143
    00144     static QwtValueList noTicks;
    00145     return noTicks;
    00146 }