curveview.h

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#ifndef CURVEVIEW_H
#define CURVEVIEW_H

#include <baseview.h>
#include <QAbstractGraphicsShapeItem>
#include <poly/algorithm.h>

namespace frechet { namespace view {

class CurveView : public BaseView
{
    Q_OBJECT
public:
    CurveView(QWidget *parent = 0);

    void populateScene(const Curve& P, const Curve& Q, frechet::poly::Algorithm::ptr alg);

    virtual void saveSettings(QSettings& settings, QString group);
    virtual void restoreSettings(QSettings& settings, QString group);

    bool separateCurves() const { return _separate; }
    virtual void segmentSelected(GraphicsHoverLineItem *item) override;

signals:
    void hiliteSegment(int loc, int a, int b);

public slots:
    void setSeparateCurves(bool sep);
    void onAlgorithmChanged(int alg);
    void onHiliteSegment(int loc, int a, int b);

private:
    void doHiliteSegment(GraphicsHoverLineItem::Location loc, int a, int b);

    static const QPen PEN_A;                
    static const QPen PEN_B;                
    static const QPen PEN_C_DIAGS;          
    static const QPen PEN_T_DIAGS;          
    static const QPen PEN_PASSIVE_DIAGS;    
    static const double SEPARATOR;
    bool _separate;

    QGraphicsItemGroup *polygon_a;  
    QGraphicsItemGroup *polygon_b;  
    QGraphicsItemGroup *diagonals_a;  
    QGraphicsItemGroup *diagonals_b;  
    QRectF polygon_bounds;

    QGraphicsPathItem *select_a;    
    QGraphicsPathItem *select_b;    

    QGraphicsItemGroup* addPolygonToScene(const Curve& poly, QPen pen, GraphicsHoverLineItem::Location hover);
    QGraphicsItemGroup* addSegmentsToScene(QGraphicsItemGroup* group,
                            frechet::poly::Triangulation::Edge_range d,
                            const frechet::poly::Segments& exclude,
                            bool with_edges,
                            QPen pen, GraphicsHoverLineItem::Location hover);
    QGraphicsItemGroup* addSegmentsToScene(QGraphicsItemGroup* group,
                            const frechet::poly::Segments& d,
                            bool with_edges,
                            QPen pen,
                            const Curve& P, GraphicsHoverLineItem::Location hover);
    QGraphicsLineItem* createLineItem(QLineF line, QPen pen,
                                  frechet::poly::Segment seg,
                                  QGraphicsItemGroup* group, GraphicsHoverLineItem::Location hover);

    friend class GraphicsHoverLineItem;
};

} }  //  namespace frechet::view
#endif // CURVEVIEW_H