diagramtextitem.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 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