elementprimitivedecorator.h

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/*
        Copyright 2006-2020 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