FlowVis/transferwidget.h

#ifndef TRANSFERWIDGET_H
#define TRANSFERWIDGET_H

#include <QDataStream>
#include <QtGui>
#include "hoverpoints.h"




class TransferWidget : public QWidget
{
        Q_OBJECT

public:
        TransferWidget(QWidget *parent = NULL);
        ~TransferWidget();

        void paintEvent(QPaintEvent *e);
        
        friend QDataStream &operator<<(QDataStream &out,const TransferWidget *transfer);

        friend QDataStream &operator>>(QDataStream &in,TransferWidget *transfer);

private:
        QLinearGradient gradient;
        QLinearGradient gradientWithAlpha;
        QGradientStops stops;
        QImage shadeImage;
        QImage transferImage;
        HoverPoints *hoverPoints;

        void Init();


        void calcShadeImage();


        void calcGradientStops();


        void saveToFile(QString filename);


        void loadFromFile(QString filename, QVector<QPointF> &points, QVector<QColor> &colors);


        void addTestPoints();

signals:


        void InvokeChangeSelectedColor(const QColor &color);


        void InvokeUpdateColorSelector(const QColor &color);


        void TransferImageUpdated(const QImage &image);

public slots:
        void ChangeSelectedColor(const QColor &color){emit InvokeChangeSelectedColor(color);}


        void PointsChanged();


        void SaveConfig(QString filename);


        void LoadConfig(QString filename);
};

QDataStream &operator<<(QDataStream &out,const TransferWidget *transfer);
QDataStream &operator>>(QDataStream &in, TransferWidget *transfer);
#endif // TRANSFERWIDGET_H