matrixion/include/ui/ToggleButton.h

#pragma once

#include <QAbstractButton>
#include <QColor>

class ToggleTrack;
class ToggleThumb;

enum class Position
{
        Left,
        Right
};

class Toggle : public QAbstractButton
{
        Q_OBJECT

        Q_PROPERTY(QColor activeColor WRITE setActiveColor READ activeColor)
        Q_PROPERTY(QColor disabledColor WRITE setDisabledColor READ disabledColor)
        Q_PROPERTY(QColor inactiveColor WRITE setInactiveColor READ inactiveColor)
        Q_PROPERTY(QColor trackColor WRITE setTrackColor READ trackColor)

public:
        Toggle(QWidget *parent = nullptr);

        void setState(bool isEnabled);

        void setActiveColor(const QColor &color);
        void setDisabledColor(const QColor &color);
        void setInactiveColor(const QColor &color);
        void setTrackColor(const QColor &color);

        QColor activeColor() const { return activeColor_; };
        QColor disabledColor() const { return disabledColor_; };
        QColor inactiveColor() const { return inactiveColor_; };
        QColor trackColor() const { return trackColor_.isValid() ? trackColor_ : QColor("#eee"); };

        QSize sizeHint() const override { return QSize(64, 48); };

protected:
        void paintEvent(QPaintEvent *event) override;

private:
        void init();
        void setupProperties();

        ToggleTrack *track_;
        ToggleThumb *thumb_;

        QColor disabledColor_;
        QColor activeColor_;
        QColor inactiveColor_;
        QColor trackColor_;
};

class ToggleThumb : public QWidget
{
        Q_OBJECT

        Q_PROPERTY(QColor thumbColor WRITE setThumbColor READ thumbColor)

public:
        ToggleThumb(Toggle *parent);

        Position shift() const { return position_; };
        qreal offset() const { return offset_; };
        QColor thumbColor() const { return thumbColor_; };

        void setShift(Position position);
        void setThumbColor(const QColor &color)
        {
                thumbColor_ = color;
                update();
        };

protected:
        bool eventFilter(QObject *obj, QEvent *event) override;
        void paintEvent(QPaintEvent *event) override;

private:
        void updateOffset();

        Toggle *const toggle_;
        QColor thumbColor_;

        Position position_;
        qreal offset_;
};

class ToggleTrack : public QWidget
{
        Q_OBJECT

        Q_PROPERTY(QColor trackColor WRITE setTrackColor READ trackColor)

public:
        ToggleTrack(Toggle *parent);

        void setTrackColor(const QColor &color);
        QColor trackColor() const { return trackColor_; };

protected:
        bool eventFilter(QObject *obj, QEvent *event) override;
        void paintEvent(QPaintEvent *event) override;

private:
        Toggle *const toggle_;
        QColor trackColor_;
};