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1 | 1 | #ifndef SCIQLOP_SQPCOLORSCALE_H |
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2 | 2 | #define SCIQLOP_SQPCOLORSCALE_H |
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3 | 3 | |
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4 | 4 | #include <Visualization/qcustomplot.h> |
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5 | 5 | |
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6 | 6 | #include <QLoggingCategory> |
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7 | 7 | |
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8 | 8 | Q_DECLARE_LOGGING_CATEGORY(LOG_SqpColorScale) |
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9 | 9 | |
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10 | 10 | /** |
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11 | 11 | * @brief The SqpColorScale struct represents the color scale for some graphs (such as |
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12 | 12 | * spectrograms). |
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13 | 13 | * |
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14 | 14 | * Its implementation is based on the QCustomPlot color scale (@sa QCPColorScale) to which are added |
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15 | 15 | * other useful properties for viewing in SciQlop |
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16 | 16 | */ |
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17 | 17 | struct SqpColorScale { |
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18 | 18 | static std::pair<double, double> computeThresholds(const SqpColorScale &scale); |
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19 | 19 | |
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20 | 20 | explicit SqpColorScale(QCustomPlot &plot); |
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21 | 21 | |
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22 | void updateDataRange() noexcept; | |
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23 | ||
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22 | 24 | /// QCustomPlot object representing the color scale. |
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23 | 25 | /// @remarks The SqpColorScale instance has not the property on this pointer. The pointer must |
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24 | 26 | /// remain valid throughout the existence of the SqpColorScale instance |
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25 | 27 | QCPColorScale *m_Scale{nullptr}; |
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26 | 28 | bool m_AutomaticThreshold{false}; |
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27 | 29 | QCPColorGradient::GradientPreset m_GradientPreset{QCPColorGradient::gpJet}; |
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28 | 30 | }; |
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29 | 31 | |
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30 | 32 | #endif // SCIQLOP_SQPCOLORSCALE_H |
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1 | 1 | #include "Visualization/SqpColorScale.h" |
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2 | 2 | |
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3 | 3 | #include <Data/DataSeriesUtils.h> |
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4 | 4 | |
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5 | 5 | #include <Visualization/QCPColorMapIterator.h> |
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6 | 6 | |
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7 | 7 | Q_LOGGING_CATEGORY(LOG_SqpColorScale, "SqpColorScale") |
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8 | 8 | |
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9 | 9 | namespace { |
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10 | 10 | |
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11 | 11 | const auto DEFAULT_GRADIENT_PRESET = QCPColorGradient::gpJet; |
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12 | 12 | const auto DEFAULT_RANGE = QCPRange{1.0e3, 1.7e7}; |
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13 | 13 | |
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14 | 14 | } // namespace |
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15 | 15 | |
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16 | 16 | std::pair<double, double> SqpColorScale::computeThresholds(const SqpColorScale &scale) |
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17 | 17 | { |
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18 | 18 | auto qcpScale = scale.m_Scale; |
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19 | 19 | |
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20 | 20 | auto colorMaps = qcpScale->colorMaps(); |
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21 | 21 | if (colorMaps.size() != 1) { |
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22 | 22 | return {std::numeric_limits<double>::quiet_NaN(), std::numeric_limits<double>::quiet_NaN()}; |
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23 | 23 | } |
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24 | 24 | |
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25 | 25 | // Computes thresholds |
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26 | 26 | auto isLogarithmicScale = qcpScale->dataScaleType() == QCPAxis::stLogarithmic; |
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27 | 27 | auto colorMapData = colorMaps.first()->data(); |
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28 | 28 | QCPColorMapIterator begin{colorMapData, true}; |
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29 | 29 | QCPColorMapIterator end{colorMapData, false}; |
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30 | 30 | |
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31 | 31 | return DataSeriesUtils::thresholds(begin, end, isLogarithmicScale); |
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32 | 32 | } |
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33 | 33 | |
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34 | 34 | SqpColorScale::SqpColorScale(QCustomPlot &plot) |
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35 | 35 | : m_Scale{new QCPColorScale{&plot}}, |
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36 |
m_AutomaticThreshold{ |
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36 | m_AutomaticThreshold{true}, | |
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37 | 37 | m_GradientPreset{DEFAULT_GRADIENT_PRESET} |
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38 | 38 | { |
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39 | 39 | m_Scale->setGradient(m_GradientPreset); |
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40 | 40 | m_Scale->setDataRange(DEFAULT_RANGE); |
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41 | 41 | } |
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42 | ||
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43 | void SqpColorScale::updateDataRange() noexcept | |
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44 | { | |
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45 | // Updates data range only if mode is automatic | |
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46 | if (!m_AutomaticThreshold) { | |
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47 | return; | |
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48 | } | |
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49 | ||
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50 | double minThreshold, maxThreshold; | |
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51 | std::tie(minThreshold, maxThreshold) = computeThresholds(*this); | |
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52 | if (std::isnan(minThreshold) || std::isnan(maxThreshold)) { | |
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53 | qCCritical(LOG_SqpColorScale()) | |
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54 | << "Can't update data range of color scale: thresholds computed are invalid"; | |
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55 | return; | |
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56 | } | |
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57 | ||
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58 | // Updates thresholds | |
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59 | m_Scale->setDataRange({minThreshold, maxThreshold}); | |
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60 | } | |
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