C:/Projekte/C++/FlowVIS_107/src/OpenGLWidget.h

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#ifndef OPENGLWIDGET_H_
#define OPENGLWIDGET_H_

#include "common.h"

#include "./Ui_OpenGLWidget.h"
#include "FlowData.h"
#include "Texture.h"
#include "Shader.h"
#include "Arrows.h"
#include "StreamLine.h"

#include <glew/glew.h>
#include <il/il.h>
#include <QGLWidget>

class OpenGLWidget : public QGLWidget, protected Ui_OpenGLWidget
{
        Q_OBJECT


public:

        OpenGLWidget(QWidget* parent = 0, Qt::WFlags flags = 0);

          virtual ~OpenGLWidget();

    void initializeGL();

    void resizeGL( int width, int height );

    void paintGL();

    void setFlowData(FlowData* data);

    void setColorBarTexture(QGradientStops stops);

public slots:
  // nk - select color for streamlines
  void selectStreamLineColor();
  
  // nk - select color for streamline glyphs
  void selectStreamGlyphColor();

  // nk - set size of glyphs in streamline
  void setStreamGlyphSize(int gs);

  // nk - set distance of glyphs in streamline
  void setStreamGlyphDistance(int gd);

  // nk - update streamlines -> call m_streamlines->create()
  void updateStreamLines();

  // nk - set streamline integration method to euler
  void setEuler();

  // nk - set streamline integration to rungekutta
  void setRungeKutta();

  // nk - change background selected in Navigation
  void setActiveBackground(int bg);

  // nk - enable arrows
  void setActiveArrows(bool gl);
  // nk - enable transfer function
  void setActiveTransferFunction(bool tf);

  void resetDataView();

  // set values in StreamLine::<functionName> 
  // nk - (no signals because StreamLine:: is no QObject & so no support for signal/slot)!
  // convert from int to [0...1] float
  void setDSep( int dSep );
  void setDTest( int dTest );

  void setLinesActive( bool isActive );
  void setTaperingActive( bool isActive );
  void setGlyphActive( bool isActive ); 

signals:
  void setPointSize(int p);
  void setResolution(int r);
  void setActivePointScale(bool ps);
  void setArrowColor();


protected:
  // nk - use mouse wheel event for zoom
  void wheelEvent(QWheelEvent* we);

  // nk - use left mouse button for pan X, right mouse button for pan Y
  void mousePressEvent(QMouseEvent* pe);
  void mouseMoveEvent(QMouseEvent* me);
  void mouseReleaseEvent(QMouseEvent* re);

private:

    void drawBackground();

    void setDataView(bool reset = false); // on reset m_defaultOrtho is set back

    void initGlew();

    void initDevIL();

    void createStreamLines(); 


private:

    FlowData* m_flowData;

    FlowGeometry* m_geomData;

    Arrows* m_arrows;

    StreamLine* m_streamLine;

    bool m_librariesInitialised;

    bool m_isFileOpen;

    bool m_flippedAxes;

    bool m_isActiveArrows;

    QWidget* m_parent;

    QColor m_clearColor;

    GLuint m_dataDimX, m_dataDimY;
    GLuint m_windowWidth, m_windowHeight;
    float  m_aspectRatio;

    GLuint m_activeBackground;
    bool   m_isActiveBackground;

    bool m_isActiveStreamlines;

    bool m_isActiveTransferFunction;

    GLuint m_backgroundTexID[max_channels];
    GLuint m_colorBarTexID;

    Shader* m_colorLookupShader;

    GLint m_tfTextureLocation;
    GLint m_bgTextureLocation;
    GLint m_showTfLocation;

    Qt::MouseButton m_panXButton;
    Qt::MouseButton m_panYButton;

    OrthoViewT m_defaultOrtho;

    OrthoViewT m_currentOrtho;

    QPoint m_currentMousePos;

};
#endif

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