PolygonView.h

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//  ************************************************************************************************
//
//  BornAgain: simulate and fit reflection and scattering
//
//! @file      GUI/View/Mask/PolygonView.h
//! @brief     Defines PolygonView class
//!
//! @homepage  http://www.bornagainproject.org
//! @license   GNU General Public License v3 or higher (see COPYING)
//! @copyright Forschungszentrum Jülich GmbH 2018
//! @authors   Scientific Computing Group at MLZ (see CITATION, AUTHORS)
//
//  ************************************************************************************************
 
#ifndef BORNAGAIN_GUI_VIEW_MASK_POLYGONVIEW_H
#define BORNAGAIN_GUI_VIEW_MASK_POLYGONVIEW_H
 
#include "GUI/View/Mask/IShape2DView.h"
#include <QPolygonF>
 
class PolygonItem;
 
 
//! This is a View of polygon mask (represented by PolygonItem) on GraphicsScene.
 
class PolygonView : public IShape2DView {
    Q_OBJECT
 
public:
    int type() const override { return MaskEditorHelper::POLYGON; }
 
    explicit PolygonView(PolygonItem* item);
    ~PolygonView() override;
 
    SessionItem* parameterizedItem() const override;
 
    void addView(IShape2DView* childView, int row) override;
    bool isClosedPolygon();
    QPointF lastAddedPoint() const;
    QPainterPath shape() const override;
 
public slots:
    bool closePolygonIfNecessary();
    void onClosePolygonRequest(bool value);
 
protected slots:
    void update_view() override;
 
protected:
    void paint(QPainter* painter, const QStyleOptionGraphicsItem*, QWidget*) override;
    QVariant itemChange(GraphicsItemChange change, const QVariant& value) override;
    void mouseMoveEvent(QGraphicsSceneMouseEvent* event) override;
 
private:
    void update_polygon();
    void update_points();
    void setChildrenVisible(bool value);
    bool makePolygonClosed();
    void onItemDestroyed() override;
 
private:
    PolygonItem* m_item;
    QPolygonF m_polygon;
    bool m_block_on_point_update;
    bool m_close_polygon_request;
};
 
#endif // BORNAGAIN_GUI_VIEW_MASK_POLYGONVIEW_H