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#include "Visualization/SqpColorScale.h"
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#include <Data/DataSeriesUtils.h>
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#include <Visualization/QCPColorMapIterator.h>
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Q_LOGGING_CATEGORY(LOG_SqpColorScale, "SqpColorScale")
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namespace {
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const auto DEFAULT_GRADIENT_PRESET = QCPColorGradient::gpJet;
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const auto DEFAULT_RANGE = QCPRange{1.0e3, 1.7e7};
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} // namespace
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std::pair<double, double> SqpColorScale::computeThresholds(const SqpColorScale &scale)
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{
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auto qcpScale = scale.m_Scale;
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auto colorMaps = qcpScale->colorMaps();
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if (colorMaps.size() != 1) {
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return {std::numeric_limits<double>::quiet_NaN(), std::numeric_limits<double>::quiet_NaN()};
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}
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// Computes thresholds
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auto isLogarithmicScale = qcpScale->dataScaleType() == QCPAxis::stLogarithmic;
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auto colorMapData = colorMaps.first()->data();
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QCPColorMapIterator begin{colorMapData, true};
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QCPColorMapIterator end{colorMapData, false};
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return DataSeriesUtils::thresholds(begin, end, isLogarithmicScale);
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}
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SqpColorScale::SqpColorScale(QCustomPlot &plot)
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: m_Scale{new QCPColorScale{&plot}},
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m_AutomaticThreshold{false},
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m_GradientPreset{DEFAULT_GRADIENT_PRESET}
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{
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m_Scale->setGradient(m_GradientPreset);
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m_Scale->setDataRange(DEFAULT_RANGE);
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}
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void SqpColorScale::updateDataRange() noexcept
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{
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// Updates data range only if mode is automatic
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if (!m_AutomaticThreshold) {
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return;
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}
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double minThreshold, maxThreshold;
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std::tie(minThreshold, maxThreshold) = computeThresholds(*this);
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if (std::isnan(minThreshold) || std::isnan(maxThreshold)) {
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qCCritical(LOG_SqpColorScale())
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<< "Can't update data range of color scale: thresholds computed are invalid";
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return;
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}
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// Updates thresholds
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m_Scale->setDataRange({minThreshold, maxThreshold});
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}
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