C:/Documents and Settings/benesova/Plocha/FlowVis/vislab2/transferFunctionDisplayWidget.h

Go to the documentation of this file.

#ifndef __TRANSFER_FUNCTION_DISPLAY_WIDGET__
#define __TRANSFER_FUNCTION_DISPLAY_WIDGET__

#include <QBrush>
#include <QPen>
#include <QPixmap>
#include <QWidget>
#include <QtGui>

#include <windows.h>
#include <gl/gl.h>

#include <cmath>

#include "histogram.h"
#include "logger.h"
#include "interpolateData.h"

class TransferFunctionDisplayWidget : public QWidget
{
        Q_OBJECT

public:
        TransferFunctionDisplayWidget(QWidget *parent = 0, Histogram *histogram = NULL);

        ~TransferFunctionDisplayWidget();

        QSize minimumSizeHint() const;
        QSize sizeHint() const;

        void setHistogram(Histogram *histogram);

        static int getWidth() {return width;}
        static int getHeight() {return height;}

        unsigned char *getData();

        void writeData(FILE *fp);
        void readData(FILE *fp);

signals:
        void transferFunctionChanged();

protected:
        void paintEvent(QPaintEvent *event);
        void mousePressEvent(QMouseEvent *event);
        void mouseMoveEvent(QMouseEvent *event);
        void mouseReleaseEvent(QMouseEvent *event);

private:
        unsigned char *textureData;

        static double triggerDistance;

        Histogram *histogram;

        static const int width;
        static const int height;
        static const int densityRange;

        static const int histogramHeight;
        static const int gapHeight;
        static const int gradientHeight;

        bool leftMouseButtonHeld;
        int selected;

        QPen *graphPen;
        QPen *functionPen;
        QBrush *graphBrush;
        QLinearGradient *alphaGradient;

        QPoint *linePoints;
        int noPoints;

        int addPoint(int x, int y);
        void removePoint(int x, int y);
        int findPoint(int x, int y, int triggerDistance);
        void removePointWithIndex(int index);

        void updateAll();
        void updateData();

        int genColorValueFromHeight(int height);
        void createGradientStops();
};

#endif

---