src/ShadeWidget.h

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#pragma once

#include "common.h"
#include "HoverPoints.h"
#include <QtGui/QWidget>

class ShadeWidget : public QWidget
{
    Q_OBJECT
public:
    enum ShadeType {
        RedShade,
        GreenShade,
        BlueShade,
        ARGBShade
    };

    ShadeWidget(ShadeType type, QWidget *parent, std::string name);

    void setGradientStops(const QGradientStops &stops);
    QGradientStops getGradientStops() const {return m_alpha_gradient.stops(); }

    void paintEvent(QPaintEvent *e);

    QSize sizeHint() const { return QSize(150, 40); }

    void setPoints(QPolygonF pts);
    QPolygonF points() const;

    void setHistogram(const int*);
    void clearHistogram();

    std::string getName() const;

    HoverPoints *hoverPoints() const { return m_hoverPoints; }

    uint colorAt(int x);

signals:
    void colorsChanged();

private:
    void generateShade();

    ShadeType m_shade_type;
    QImage m_shade;
    HoverPoints *m_hoverPoints;
    QLinearGradient m_alpha_gradient;
    std::string m_shadeName;

    // Histogram dependent 
    int densityArray[ DENSITY_COUNT ];
    int maxDensityIndex;
    int* m_density;
    bool histogramVisible;

    QPixmap* m_nohist;
    QPixmap* m_hist;
};

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