elementview.h

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/*
        Copyright 2006-2026 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 ELEMENT_VIEW_H
#define ELEMENT_VIEW_H
#include <QGraphicsView>
#include "elementscene.h"

class ElementView : public QGraphicsView {
        Q_OBJECT
        friend class PastePartsCommand;
        
        // constructors, destructor
        public:
        ElementView(ElementScene *, QWidget * = nullptr);
        ~ElementView() override;
        
        private:
        ElementView(const ElementView &);
        
        // methods
        public:
        ElementScene *scene() const;
        void setScene(ElementScene *);
        QRectF viewedSceneRect() const;
        
        protected:
        void mousePressEvent(QMouseEvent *) override;
        void mouseMoveEvent(QMouseEvent *) override;
        void mouseReleaseEvent(QMouseEvent *) override;
        bool gestureEvent(QGestureEvent *event);
        bool event(QEvent *event) override;
        void wheelEvent(QWheelEvent *) override;
        void drawBackground(QPainter *, const QRectF &) override;
        
        private:
        QRectF applyMovement(const QRectF &, const QPointF &);
        void scaleClamped(qreal factor);

        static constexpr qreal m_min_zoom = 0.1;
        static constexpr qreal m_max_zoom = 200.0;
        
        public slots:
        void setVisualisationMode();
        void setSelectionMode();
        void zoomIn();
        void zoomOut();
        void zoomInSlowly();
        void zoomOutSlowly();
        void zoomFit();
        void zoomReset();
        void adjustSceneRect();
        void resetSceneRect ();
        void cut();
        void copy();
        void paste();
        void pasteInArea();
        
        signals:
        void modeChanged();
        
        private slots:
        void getPasteArea(const QRectF &);
        ElementContent pasteAreaDefined(const QRectF &);
        ElementContent paste(const QPointF &);
        ElementContent paste(const QDomDocument &, const QPointF &);
        ElementContent pasteWithOffset(const QDomDocument &);
        
        // attributes
        private:
        ElementScene *m_scene;
        QString to_paste_in_area_;
        int offset_paste_count_;
        QPointF start_top_left_corner_;
        QPointF reference_view_;
        bool gestures() const;
};
#endif