SwitchButton.h

#pragma once

#ifndef SWITCHBUTTON_H
    #define SWITCHBUTTON_H

    #include "QAbstractButton"
    #include "QPropertyAnimation"

/**
 * This class inherits QAbstractButton.
 * It is an utility class to create android-like animated switches
 * inspiration:
 * https://stackoverflow.com/questions/14780517/toggle-switch-in-qt
 */
class SwitchButton : public QAbstractButton
{
    Q_OBJECT
    Q_PROPERTY(int offset READ offset WRITE setOffset)
    Q_PROPERTY(QBrush brush READ brush WRITE setBrush)
    Q_PROPERTY(bool _switch READ state WRITE setState)

public:
    SwitchButton(QString s0, QString s1, QWidget* parent = 0);
    //~SwitchButton();

    QSize sizeHint() const override;

    void setHeight(int h);
    int  offset() const
    {
        return _x;
    }
    void setOffset(int o)
    {
        _x = o;
        update();
    }
    QBrush brush() const
    {
        return _brush;
    }
    void setBrush(const QBrush& brsh)
    {
        _brush = brsh;
    }
    bool state() const
    {
        return _switch;
    }
    void setState(bool toggle)
    {
        _switch = toggle;
        animateSwitch();
        update();
    }

    void animateSwitch();

signals:
    void emitSetEnabled(bool toggle);

protected:
    void paintEvent(QPaintEvent* event) override;
    void mouseReleaseEvent(QMouseEvent*) override;
    void enterEvent(QEvent* e) override;

    bool   _switch;                  /**< state fo the switch  */
    qreal  _opacity;                 /**< opacity  */
    int    _x, _y, _height, _margin; /**< position and dimensions  */
    QBrush _thumb, _track, _brush;
    QPropertyAnimation* _anim = nullptr; /**< animation  */
    QString             _s0;             /**< text in state 0  */
    QString             _s1;             /**< text in state 1  */
};

#endif // SWITCHBUTTON_H