#ifndef GTL_GUI_SPGR_WIDGET_H
#define GTL_GUI_SPGR_WIDGET_H

#include <QWidget>
#include "qpainter.h"

#include "math/gtl_math_spec.h"
#include "gui/spgr/gtl_gui_spgr_series.h"
#include "gui/spgr/gtl_gui_spgr_chart.h"
#include "gui/gui_global.h"

namespace Ui {
class spgr_widget;
}

namespace gtl
{
    namespace gui
    {
        namespace spgr
        {

            class GTL_GUI_EXPORT gradient_widget : public QWidget
            {
                Q_OBJECT

            public:
                gradient_widget(QWidget *parent) : QWidget(parent){}

                void paintEvent(QPaintEvent *)
                {
                    QPainter painter(this);
                    QLinearGradient gradient(0, 0, width(), 0);
                    gradient.setColorAt(0, Qt::blue);
                    gradient.setColorAt(0.25, Qt::cyan);
                    gradient.setColorAt(0.5, Qt::green);
                    gradient.setColorAt(0.75, Qt::yellow);
                    gradient.setColorAt(1, Qt::red);
                    painter.setBrush(gradient);
                    painter.drawRect(rect());
                }
            };

            class GTL_GUI_EXPORT widget : public QWidget
            {
                Q_OBJECT

            public:
                explicit widget(QWidget *parent, gtl::math::spec *spec);
                ~widget();

                line_widget* time_widget();
                line_widget* freq_widget();

            private:
                Ui::spgr_widget *ui;
                QDomElement* _root_element;
                series* _series;
                chart* _chart;

                void update_parameters();
                void closeEvent(QCloseEvent *event);

            signals:
                void closed();
                void deleted();
                void time_chart_changed();
                void freq_chart_changed();
            };
        }
    }
}

#endif // GTL_GUI_SPGR_WIDGET_H