FactValueSliderListModel.h

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#pragma once
 
#include <QtCore/QAbstractListModel>
#include <QtCore/QByteArray>
#include <QtCore/QHash>
#include <QtCore/QObject>
#include <QtQmlIntegration/QtQmlIntegration>
 
class Fact;
 
class FactValueSliderListModel : public QAbstractListModel
{
    Q_OBJECT
    QML_ELEMENT
    QML_UNCREATABLE("")
    Q_PROPERTY(double initialValueAtPrecision READ initialValueAtPrecision NOTIFY initialValueAtPrecisionChanged)
 
public:
    explicit FactValueSliderListModel(const Fact &fact, QObject *parent = nullptr);
    ~FactValueSliderListModel();
 
    double initialValueAtPrecision() const { return _initialValueAtPrecision; }
 
    Q_INVOKABLE int resetInitialValue(void);
    Q_INVOKABLE double valueAtModelIndex(int index) const;
    Q_INVOKABLE int valueIndexAtModelIndex(int index) const;
 
signals:
    void initialValueAtPrecisionChanged();
 
private:
    double _valueAtPrecision(double value) const;
 
    int rowCount(const QModelIndex &parent = QModelIndex()) const final { Q_UNUSED(parent); return _cValues; }
    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const final;
    QHash<int, QByteArray> roleNames() const final;
 
    const Fact &_fact;
    int _cValues = 0;
    int _firstValueIndexInWindow = 0;
    int _initialValueIndex = 0;
    int _cPrevValues = 0;
    int _cNextValues = 0;
    int _windowSize = 0;
    double _initialValue = 0;
    double _initialValueAtPrecision = 0;
    double _increment = 0;
 
    static constexpr int _valueRole = Qt::UserRole;
    static constexpr int _valueIndexRole = Qt::UserRole + 1;
};