ISceneAdaptor.h

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//  ************************************************************************************************
//
//  BornAgain: simulate and fit reflection and scattering
//
//! @file      GUI/View/Mask/ISceneAdaptor.h
//! @brief     Defines interface class ISceneAdaptor
//!
//! @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_ISCENEADAPTOR_H
#define BORNAGAIN_GUI_VIEW_MASK_ISCENEADAPTOR_H
 
#include <QObject>
#include <QRectF>
 
//! Interface to adapt MaskItems coordinates (expressed in units of IntensityDataItem)
//! to/from scene coordinates.
 
class ISceneAdaptor : public QObject {
    Q_OBJECT
public:
    ~ISceneAdaptor() override = default;
 
    //! convert native mask x-coordinate to scene coordinate
    virtual qreal toSceneX(qreal) const = 0;
    //! convert native mask y-coordinate to scene coordinate
    virtual qreal toSceneY(qreal) const = 0;
    //! convert scene x-coordinate to native mask coordinate
    virtual qreal fromSceneX(qreal) const = 0;
    //! convert scene y-coordinate to native mask coordinate
    virtual qreal fromSceneY(qreal) const = 0;
 
    //! Returns viewport rectangle in scene coordinates
    virtual const QRectF& viewportRectangle() const { return m_viewport_rectangle; }
 
signals:
    void update_request();
 
protected:
    QRectF m_viewport_rectangle;
};
 
class DefaultSceneAdaptor : public ISceneAdaptor {
    Q_OBJECT
public:
    DefaultSceneAdaptor() = default;
    qreal toSceneX(qreal value) const override { return value; }
    qreal toSceneY(qreal value) const override { return value; }
    qreal fromSceneX(qreal value) const override { return value; }
    qreal fromSceneY(qreal value) const override { return value; }
};
 
#endif // BORNAGAIN_GUI_VIEW_MASK_ISCENEADAPTOR_H