sparse_widget.h

#ifndef SPARSE_WIDGET_H
#define SPARSE_WIDGET_H

#include <QPainter>
#include <functional>
#include "gui/image_widget.h"

class ROVIZ_EXPORT SparseWidget : public ImageWidget
{
Q_OBJECT

public:
    SparseWidget(std::function<void (SparseWidget *)> draw_func, StreamObject default_item, std::function<Image (StreamObject)> image_fn, OutputPrivate *out);

    void reset(void) override;

    void newObject(StreamObject obj) override;

    template<class T>
    void draw(void);

protected:
    void paintEvent(QPaintEvent *event) override;

private:
    StreamObject sparse_obj, def_item;
    std::function<void (SparseWidget *)> draw_fn;
    std::function<Image (StreamObject)> image_fn;

    template<class T>
    void updatePenColor(QPainter &painter, T obj);
    double xTF(double x);
    double yTF(double y);
    double wTF(double w);
    double hTF(double h);
};

#endif // SPARSE_WIDGET_H