diagramtextitem.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 DIAGRAM_TEXT_ITEM_H
#define DIAGRAM_TEXT_ITEM_H
 
#include <QGraphicsTextItem>
#include <QFont>
 
class Diagram;
class QDomElement;
class QDomDocument;
 
class DiagramTextItem : public QGraphicsTextItem
{
        Q_OBJECT
 
        Q_PROPERTY(QColor color READ color WRITE setColor NOTIFY colorChanged)
        Q_PROPERTY(Qt::Alignment alignment READ alignment WRITE setAlignment NOTIFY alignmentChanged)
        Q_PROPERTY(QString plainText READ toPlainText WRITE setPlainText)
        Q_PROPERTY(QFont font READ font WRITE setFont NOTIFY fontChanged)
        
        
        signals:
                void colorChanged(QColor color);
                void alignmentChanged(Qt::Alignment alignment);
                void textEdited(const QString &old_str, const QString &new_str);
                void fontChanged(QFont font);
 
        public:
                DiagramTextItem(QGraphicsItem * = nullptr);
                DiagramTextItem(const QString &, QGraphicsItem * = nullptr);
 
        private:
                void build();
        
        public:
                enum { Type = UserType + 1004 };
                int type() const override { return Type; }
 
                Diagram *diagram() const;
                virtual void fromXml(const QDomElement &) = 0;
                virtual QDomElement toXml(QDomDocument &) const;
                void edit();
 
                QPointF mapMovementToScene    (const QPointF &) const;
                QPointF mapMovementFromScene  (const QPointF &) const;
                QPointF mapMovementToParent   (const QPointF &) const;
                QPointF mapMovementFromParent (const QPointF &) const;
 
                void setFont(const QFont &font);
 
                void setColor(const QColor& color);
                QColor color() const;
 
                void setNoEditable(bool e = true) {m_no_editable = e;}
                
                void setAlignment(const Qt::Alignment &alignment);
                Qt::Alignment alignment() const;
                bool m_block_alignment = false;
                
                QRectF frameRect() const;
                
                void setHtml(const QString &text);
                void setPlainText(const QString &text);
                bool isHtml() const;
 
        protected:
                void paint(QPainter *,
                           const QStyleOptionGraphicsItem *,
                           QWidget *) override;
                void focusInEvent(QFocusEvent *) override;
                void focusOutEvent(QFocusEvent *) override;
 
                void mouseDoubleClickEvent (QGraphicsSceneMouseEvent *event) override;
                void mousePressEvent       (QGraphicsSceneMouseEvent *event) override;
                void mouseMoveEvent        (QGraphicsSceneMouseEvent *event) override;
                void mouseReleaseEvent     (QGraphicsSceneMouseEvent *event) override;
 
                void hoverEnterEvent(QGraphicsSceneHoverEvent *) override;
                void hoverLeaveEvent(QGraphicsSceneHoverEvent *) override;
                void hoverMoveEvent(QGraphicsSceneHoverEvent *) override;
 
                virtual void applyRotation(const qreal &);
                void prepareAlignment();
                void finishAlignment();
 
        
        protected:
                bool
                m_mouse_hover = false,
                m_first_move = true,
                m_no_editable,
                m_is_html = false;
 
                QString
                m_previous_html_text,
                m_previous_text;
                
                QPointF m_mouse_to_origin_movement;
                
        private:
                QRectF m_alignment_rect;
                Qt::Alignment m_alignment = (Qt::AlignTop | Qt::AlignLeft);
};
#endif