checklistmodel.h

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#ifndef MODELS_CHECKLISTMODEL_H
#define MODELS_CHECKLISTMODEL_H
 
#include "../global.h"
 
#include <QAbstractListModel>
#include <QList>
 
QT_FORWARD_DECLARE_CLASS(QSettings)
 
namespace QtUtilities {
 
class ChecklistModel;
 
class QT_UTILITIES_EXPORT ChecklistItem {
    friend class ChecklistModel;
 
public:
    ChecklistItem(const QVariant &id = QVariant(), const QString &label = QString(), Qt::CheckState checked = Qt::Unchecked);
 
    const QVariant &id() const;
    const QString &label() const;
    Qt::CheckState checkState() const;
    bool isChecked() const;
 
private:
    QVariant m_id;
    QString m_label;
    Qt::CheckState m_checkState;
};
 
inline ChecklistItem::ChecklistItem(const QVariant &id, const QString &label, Qt::CheckState checkState)
    : m_id(id)
    , m_label(label)
    , m_checkState(checkState)
{
}

inline const QVariant &ChecklistItem::id() const
{
    return m_id;
}

inline const QString &ChecklistItem::label() const
{
    return m_label;
}

inline Qt::CheckState ChecklistItem::checkState() const
{
    return m_checkState;
}

 
inline bool ChecklistItem::isChecked() const
{
    return m_checkState == Qt::Checked;
}
 
class QT_UTILITIES_EXPORT ChecklistModel : public QAbstractListModel {
    Q_OBJECT
public:
    explicit ChecklistModel(QObject *parent = nullptr);
 
    int rowCount(const QModelIndex &parent = QModelIndex()) const override;
    Qt::ItemFlags flags(const QModelIndex &index) const override;
    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
    QMap<int, QVariant> itemData(const QModelIndex &index) const override;
    bool setData(const QModelIndex &index, const QVariant &value, int role = Qt::DisplayRole) override;
    bool setItemData(const QModelIndex &index, const QMap<int, QVariant> &roles) override;
    bool setChecked(int row, bool checked);
    bool setChecked(int row, Qt::CheckState checked);
    virtual QString labelForId(const QVariant &id) const;
    Qt::DropActions supportedDropActions() const override;
    bool insertRows(int row, int count, const QModelIndex &parent) override;
    bool removeRows(int row, int count, const QModelIndex &parent) override;
    const QList<ChecklistItem> &items() const;
    void setItems(const QList<ChecklistItem> &items);
    void restore(QSettings &settings, const QString &name);
    void save(QSettings &settings, const QString &name) const;
    QVariantList toVariantList() const;
    void applyVariantList(const QVariantList &checkedIds);
    static constexpr int idRole();
 
private:
    QList<ChecklistItem> m_items;
};

inline const QList<ChecklistItem> &ChecklistModel::items() const
{
    return m_items;
}

inline bool ChecklistModel::setChecked(int row, bool checked)
{
    return setChecked(row, checked ? Qt::Checked : Qt::Unchecked);
}

constexpr int ChecklistModel::idRole()
{
    return Qt::UserRole + 1;
}
} // namespace QtUtilities
 
#endif // MODELS_CHECKLISTMODEL_H