fitshistogram.h

/*
    SPDX-FileCopyrightText: 2015 Jasem Mutlaq <mutlaqja@ikarustech.com>
 
    SPDX-License-Identifier: GPL-2.0-or-later
*/
 
#pragma once
 
#include "fitscommon.h"
#include "fitsdata.h"
#include "ui_fitshistogramui.h"
 
#include <QDialog>
#include <QUndoCommand>
 
class QMouseEvent;
 
class FITSTab;
 
class histogramUI : public QDialog, public Ui::FITSHistogramUI
{
        Q_OBJECT
 
    public:
        explicit histogramUI(QDialog * parent = nullptr);
};
 
class FITSHistogram : public QDialog
{
        Q_OBJECT
 
        friend class histDrawArea;
 
    public:
        explicit FITSHistogram(QWidget * parent);
 
        enum { RED_CHANNEL, GREEN_CHANNEL, BLUE_CHANNEL };
 
        void constructHistogram();
        void syncGUI();
        void reset()
        {
            m_Constructed = false;
        }
 
        void applyFilter(FITSScale ftype);
 
        double getBinWidth(int channel = 0)
        {
            return binWidth[channel];
        }
 
        QVector<uint32_t> getCumulativeFrequency(int channel = 0) const;
 
        double getJMIndex() const;
 
        bool isConstructed()
        {
            return m_Constructed;
        }
 
 
    protected:
        void showEvent(QShowEvent * event) override;
        void driftMouseOverLine(QMouseEvent * event);
 
    public slots:
        void applyScale();
        void resizePlot();
 
    private:
        template <typename T>
        void constructHistogram();
        double cutMin;
        double cutMax;
 
        histogramUI * ui { nullptr };
        FITSTab * tab { nullptr };
 
        QVector<QVector<uint32_t>> cumulativeFrequency;
        QVector<QVector<double>> intensity;
        QVector<QVector<double>> frequency;
        QVector<QVector<QWidget *>> rgbWidgets;
        QVector<ctkRangeSlider *> sliders;
        QVector<QDoubleSpinBox *> minBoxes, maxBoxes;
 
        QVector<double> FITSMin;
        QVector<double> FITSMax;
        QVector<double> sliderScale, sliderTick;
        QVector<int> numDecimals;
 
        QVector<QCPGraph *> graphs;
        QVector<double> binWidth;
        uint16_t binCount { 0 };
        double JMIndex { 0 };
 
        int maxFrequency {0};
        FITSScale type { FITS_AUTO };
        bool isGUISynced { false};
        bool m_Constructed { false };
        QCustomPlot * customPlot { nullptr };
};
 
class FITSHistogramCommand : public QUndoCommand
{
    public:
        FITSHistogramCommand(QWidget * parent, FITSHistogram * inHisto, FITSScale newType, const QVector<double> &lmin, const QVector<double> &lmax);
        virtual ~FITSHistogramCommand();
 
        virtual void redo() override;
        virtual void undo() override;
        virtual QString text() const;
 
    private:
        bool calculateDelta(const uint8_t * buffer);
        bool reverseDelta();
 
        FITSImage::Statistic stats;
        FITSHistogram * histogram { nullptr };
        FITSScale type;
        QVector<double> min, max;
 
        unsigned char * delta { nullptr };
        unsigned long compressedBytes { 0 };
        FITSTab * tab { nullptr };
};