elementprimitivedecorator.h

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/*
    Copyright 2006-2019 The QElectroTech Team
    This file is part of QElectroTech.
    
    QElectroTech is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 2 of the License, or
    (at your option) any later version.
    
    QElectroTech is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
    
    You should have received a copy of the GNU General Public License
    along with QElectroTech.  If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef ELEMENTPRIMITIVEDECORATOR_H
#define ELEMENTPRIMITIVEDECORATOR_H

#include <QGraphicsObject>
#include "qet.h"

class ElementEditionCommand;
class ElementScene;
class CustomElementPart;
class QetGraphicsHandlerItem;

class ElementPrimitiveDecorator : public QGraphicsObject
{
    Q_OBJECT
    
    public:
        ElementPrimitiveDecorator(QGraphicsItem * = nullptr);
        ~ElementPrimitiveDecorator() override;
        
        enum { Type = UserType + 2200 };
        
            // methods
        QRectF internalBoundingRect() const;
        QRectF boundingRect () const override;
        void paint(QPainter *, const QStyleOptionGraphicsItem *, QWidget * = nullptr) override;
        int type() const override { return Type; }
        void setItems(const QList<QGraphicsItem *> &);
        void setItems(const QList<CustomElementPart *> &);
        QList<CustomElementPart *> items() const;
        QList<QGraphicsItem *> graphicsItems() const;
    
    public slots:
        void adjust();
    
    signals:
        void actionFinished(ElementEditionCommand *);
    
    protected:
        void mousePressEvent(QGraphicsSceneMouseEvent *) override;
        void mouseMoveEvent(QGraphicsSceneMouseEvent *) override;
        void mouseReleaseEvent(QGraphicsSceneMouseEvent *) override;
        void keyPressEvent(QKeyEvent *) override;
        void keyReleaseEvent(QKeyEvent *) override;
        QPointF deltaForRoundScaling(const QRectF &, const QRectF &, qreal);
        QPointF snapConstPointToGrid(const QPointF &) const;
        void snapPointToGrid(QPointF &) const;
        bool mustSnapToGrid(QGraphicsSceneMouseEvent *);
        QET::ScalingMethod scalingMethod(QGraphicsSceneMouseEvent *);
        QVariant itemChange(GraphicsItemChange change, const QVariant &value) override;
        bool sceneEventFilter(QGraphicsItem *watched, QEvent *event) override;
    
    private:
        void init();
        void saveOriginalBoundingRect();
        void adjustEffectiveBoundingRect();
        void startMovement();
        void applyMovementToRect(int, const QPointF &, QRectF &);
        CustomElementPart *singleItem() const;
        void translateItems(const QPointF &);
        void scaleItems(const QRectF &, const QRectF &);
        QRectF getSceneBoundingRect(QGraphicsItem *) const;
        QVector <QPointF> getResizingsPoints() const;
    
        
    private:
        void adjusteHandlerPos();
        void handlerMousePressEvent   (QetGraphicsHandlerItem *qghi, QGraphicsSceneMouseEvent *event);
        void handlerMouseMoveEvent    (QetGraphicsHandlerItem *qghi, QGraphicsSceneMouseEvent *event);
        void handlerMouseReleaseEvent (QetGraphicsHandlerItem *qghi, QGraphicsSceneMouseEvent *event);
        
        void addHandler();
        void removeHandler();
        
        
        
        
        QList<CustomElementPart *> decorated_items_;
        QRectF effective_bounding_rect_; 
        QRectF original_bounding_rect_; 
        QRectF modified_bounding_rect_; 
    
        int current_operation_square_;
        int grid_step_x_;              
        int grid_step_y_;              
        QPointF first_pos_;            
        QPointF latest_pos_;           
        QPointF mouse_offset_;         
        bool moving_by_keys_;          
        QPointF keys_movement_;           
        QVector<QetGraphicsHandlerItem *> m_handler_vector;
        int m_vector_index = -1;
};

#endif