qtextorientationwidget.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 Q_TEXT_ORIENTATION_WIDGET_H
#define Q_TEXT_ORIENTATION_WIDGET_H
#include <QtWidgets>
class QTextOrientationWidget : public QWidget {
    Q_OBJECT
    
    // constructors, destructor
    public:
    QTextOrientationWidget(QWidget * = nullptr);
    ~QTextOrientationWidget() override;
    private:
    QTextOrientationWidget(const QTextOrientationWidget &);
    QTextOrientationWidget &operator=(const QTextOrientationWidget &);
    
    // methods
    public:
    double orientation() const;
    void setFont(const QFont &);
    QFont font() const;
    void setDisplayText(bool);
    bool textDisplayed() const;
    void setUsableTexts(const QStringList &);
    QStringList usableTexts() const;
    bool isReadOnly() const;
    void setReadOnly(bool);
    
    public slots:
    void setOrientation(const double &);
    
    protected:
    QSize sizeHint () const override;
    int heightForWidth(int) const override;
    void paintEvent(QPaintEvent *) override;
    void mouseMoveEvent(QMouseEvent *) override;
    void mouseReleaseEvent(QMouseEvent *) override;
    
    signals:
    void orientationChanged(double);
    
    // attributes
    private:
    double squares_interval_;
    double current_orientation_;
    bool display_text_;
    QFont text_font_;
    QHash<QString, qreal> text_size_hash_;
    double highlight_angle_;
    bool must_highlight_angle_;
    bool read_only_;
    
    private:
    QString getMostUsableStringForRadius(const qreal &);
    void generateTextSizeHash();
    bool positionIsASquare(const QPointF &, double * = nullptr);
};
#endif