RangeUtils.cpp

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//  ************************************************************************************************
//
//  BornAgain: simulate and fit reflection and scattering
//
//! @file      GUI/View/PlotUtil/RangeUtils.cpp
//! @brief     Implements RangeUtils namespace
//!
//! @homepage  http://www.bornagainproject.org
//! @license   GNU General Public License v3 or higher (see COPYING)
//! @copyright Forschungszentrum Jülich GmbH 2018
//! @authors   Scientific Computing Group at MLZ (see CITATION, AUTHORS)
//
//  ************************************************************************************************
 
#include "GUI/View/PlotUtil/RangeUtils.h"
#include "GUI/Model/Data/IntensityDataItem.h"
#include "GUI/Util/Error.h"
#include "GUI/View/Tool/StyleUtils.h"
 
using gradient_map_t = QMap<QString, QCPColorGradient::GradientPreset>;
 
namespace {
 
gradient_map_t createGradientMap()
{
    gradient_map_t result;
 
    result["Grayscale"] = QCPColorGradient::gpGrayscale;
    result["Hot"] = QCPColorGradient::gpHot;
    result["Cold"] = QCPColorGradient::gpCold;
    result["Night"] = QCPColorGradient::gpNight;
    result["Candy"] = QCPColorGradient::gpCandy;
    result["Geography"] = QCPColorGradient::gpGeography;
    result["Ion"] = QCPColorGradient::gpIon;
    result["Thermal"] = QCPColorGradient::gpThermal;
    result["Polar"] = QCPColorGradient::gpPolar;
    result["Spectrum"] = QCPColorGradient::gpSpectrum;
    result["Jet"] = QCPColorGradient::gpJet;
    result["Hues"] = QCPColorGradient::gpHues;
 
    return result;
}
 
// Converts xmin (low edge of first bin) and xmax (upper edge of last bin) to the
// range expected by QCPColorMapData::setRange.
QCPRange qcpRange(double xmin, double xmax, int nbins)
{
    double dx = (xmax - xmin) / nbins;
    return QCPRange(xmin + dx / 2., xmax - dx / 2.);
}
 
QMargins defaultMargins(const QWidget& widget)
{
    auto base_size = GUI::Util::Style::SizeOfLetterM(&widget);
    int left = static_cast<int>(base_size.width() * 6.0);
    int top = static_cast<int>(base_size.height() * 1.5);
    int right = static_cast<int>(base_size.width() * 1.2);
    int bottom = static_cast<int>(base_size.height() * 4.5);
    return QMargins(left, top, right, bottom);
}
 
} // namespace
 
QCPColorGradient GUI::View::RangeUtils::getGradient(const QString& gradientName)
{
    static gradient_map_t gradient_map = createGradientMap();
 
    auto it = gradient_map.find(gradientName);
    if (it == gradient_map.end())
        throw Error("ColorMapHelper::getGradient() -> Error. No such gradient" + gradientName);
    return QCPColorGradient(it.value());
}
 
QCPColorGradient GUI::View::RangeUtils::itemGradient(const IntensityDataItem* item)
{
    return getGradient(item->getGradientValue());
}
 
QCPRange GUI::View::RangeUtils::itemXrange(const IntensityDataItem* item)
{
    return qcpRange(item->xMin(), item->xMax(), item->xSize());
}
 
QCPRange GUI::View::RangeUtils::itemZoomX(const IntensityDataItem* item)
{
    return QCPRange(item->getLowerX(), item->getUpperX());
}
 
QCPRange GUI::View::RangeUtils::itemYrange(const IntensityDataItem* item)
{
    return qcpRange(item->yMin(), item->yMax(), item->ySize());
}
 
QCPRange GUI::View::RangeUtils::itemZoomY(const IntensityDataItem* item)
{
    return QCPRange(item->getLowerY(), item->getUpperY());
}
 
QCPRange GUI::View::RangeUtils::itemDataRange(const IntensityDataItem* item)
{
    QPair<double, double> range = item->dataRange();
    return QCPRange(range.first, range.second);
}
 
QCPRange GUI::View::RangeUtils::itemDataZoom(const IntensityDataItem* item)
{
    return QCPRange(item->getLowerZ(), item->getUpperZ());
}
 
void GUI::View::RangeUtils::setLogz(QCPColorScale* scale, bool isLogz)
{
    if (isLogz && scale->dataScaleType() != QCPAxis::stLogarithmic)
        scale->setDataScaleType(QCPAxis::stLogarithmic);
 
    else if (!isLogz && scale->dataScaleType() != QCPAxis::stLinear)
        scale->setDataScaleType(QCPAxis::stLinear);
 
    setLogz(scale->axis(), isLogz);
}
 
void GUI::View::RangeUtils::setLogz(QCPAxis* axis, bool isLogz)
{
    if (isLogz) {
        axis->setNumberFormat("eb");
        axis->setNumberPrecision(0);
        axis->setScaleType(QCPAxis::stLogarithmic);
        QSharedPointer<QCPAxisTicker> ticker(new QCPAxisTickerLog);
        axis->setTicker(ticker);
    } else {
        axis->setNumberFormat("f");
        axis->setNumberPrecision(0);
        axis->setScaleType(QCPAxis::stLinear);
        QSharedPointer<QCPAxisTicker> ticker(new QCPAxisTicker);
        axis->setTicker(ticker);
    }
}
 
void GUI::View::RangeUtils::setDefaultMargins(QCustomPlot* customPlot)
{
    auto* axisRectangle = customPlot->axisRect();
    axisRectangle->setAutoMargins(QCP::msTop | QCP::msBottom);
    axisRectangle->setMargins(defaultMargins(*customPlot));
}