MaskGraphicsScene.h

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//  ************************************************************************************************
//
//  BornAgain: simulate and fit reflection and scattering
//
//! @file      GUI/View/Mask/MaskGraphicsScene.h
//! @brief     Defines class MaskGraphicsScene
//!
//! @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_MASKGRAPHICSSCENE_H
#define BORNAGAIN_GUI_VIEW_MASK_MASKGRAPHICSSCENE_H
 
#include "GUI/View/Mask/MaskDrawingContext.h"
#include "GUI/View/Mask/MaskEditorHelper.h"
#include <QGraphicsScene>
#include <QMap>
#include <QModelIndex>
#include <QSharedPointer>
 
class SessionModel;
class SessionItem;
class IShape2DView;
class ISceneAdaptor;
class MaskGraphicsProxy;
class QItemSelectionModel;
class QItemSelection;
class PolygonView;
class MaskEditorAction;
class IntensityDataItem;
class QGraphicsSceneMouseEvent;
class QPainter;
class ColorMap;
 
//! Graphics scene for MaskEditorCanvas to draw masks on top of intensity data widgets.
 
class MaskGraphicsScene : public QGraphicsScene {
    Q_OBJECT
public:
    MaskGraphicsScene(QObject* parent = nullptr);
    ~MaskGraphicsScene() override;
 
    void setMaskContext(SessionModel* model, const QModelIndex& maskContainerIndex,
                        IntensityDataItem* intensityItem);
 
    void resetContext();
 
    void setSelectionModel(QItemSelectionModel* model);
 
    ColorMap* colorMap();
signals:
    void itemContextMenuRequest(const QPoint& point);
 
public slots:
    void onActivityModeChanged(MaskEditorFlags::Activity value);
    void onMaskValueChanged(MaskEditorFlags::MaskValue value);
    void onRowsInserted(const QModelIndex&, int, int);
    void onRowsAboutToBeRemoved(const QModelIndex& parent, int first, int last);
    void onRowsRemoved(const QModelIndex&, int, int);
    void cancelCurrentDrawing();
    void resetScene();
    void updateScene();
 
private slots:
    void onSessionSelectionChanged(const QItemSelection& /* selected */,
                                   const QItemSelection& /* deselected */);
    void onSceneSelectionChanged();
 
protected:
    void mousePressEvent(QGraphicsSceneMouseEvent* event) override;
    void mouseMoveEvent(QGraphicsSceneMouseEvent* event) override;
    void mouseReleaseEvent(QGraphicsSceneMouseEvent* event) override;
    void drawForeground(QPainter* painter, const QRectF& rect) override;
    void contextMenuEvent(QGraphicsSceneContextMenuEvent* event) override;
 
private:
    void updateProxyWidget();
    void updateViews(const QModelIndex& parentIndex = {}, IShape2DView* parentView = nullptr);
    IShape2DView* addViewForItem(SessionItem* item);
    void deleteViews(const QModelIndex& parentIndex);
    void removeItemViewFromScene(SessionItem* item);
 
    bool isValidMouseClick(QGraphicsSceneMouseEvent* event);
    bool isValidForRectangleShapeDrawing(QGraphicsSceneMouseEvent* event);
    bool isValidForPolygonDrawing(QGraphicsSceneMouseEvent* event);
    bool isValidForLineDrawing(QGraphicsSceneMouseEvent* event);
    bool isValidForMaskAllDrawing(QGraphicsSceneMouseEvent* event);
 
    bool isAreaContains(QGraphicsSceneMouseEvent* event, MaskEditorHelper::EViewTypes viewType);
    bool isDrawingInProgress() const;
    void setDrawingInProgress(bool value);
    void setInPanAndZoomMode(bool value);
    void updateCursors();
 
    void makeViewAtMousePosSelected(QGraphicsSceneMouseEvent* event);
 
    void processRectangleShapeItem(QGraphicsSceneMouseEvent* event);
    void processPolygonItem(QGraphicsSceneMouseEvent* event);
    void processLineItem(QGraphicsSceneMouseEvent* event);
    void processVerticalLineItem(const QPointF& pos);
    void processHorizontalLineItem(const QPointF& pos);
    void processMaskAllItem(QGraphicsSceneMouseEvent* event);
 
    void setZValues();
    PolygonView* currentPolygon() const;
    void setItemName(SessionItem* itemToChange);
 
    SessionModel* m_maskModel;
    QItemSelectionModel* m_selectionModel;
    QMap<SessionItem*, IShape2DView*> m_ItemToView;
    MaskGraphicsProxy* m_proxy;
    QSharedPointer<ISceneAdaptor> m_adaptor;
    bool m_block_selection;
    QModelIndex m_maskContainerIndex;
    IntensityDataItem* m_intensityItem;
    SessionItem* m_currentItem;
    QPointF m_currentMousePosition;
    MaskDrawingContext m_context;
};
 
#endif // BORNAGAIN_GUI_VIEW_MASK_MASKGRAPHICSSCENE_H