baselistmodel.h

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//#
//# Copyright (C) 2020-2025 QuasarApp.
//# Distributed under the GPLv3 software license, see the accompanying
//# Everyone is permitted to copy and distribute verbatim copies
//# of this license document, but changing it is not allowed.
//#
 
#ifndef BASELISTMODEL_H
#define BASELISTMODEL_H
 
#include <QAbstractItemModel>
#include <QQmlEngine>
 
namespace ViewSolutions {

class __PrvateBaseListModel : public QAbstractListModel{
    Q_OBJECT
protected:
    __PrvateBaseListModel(QObject* parent = nullptr): QAbstractListModel(parent){}
signals:
    void listDateChanged();
};
 
 
#define BASE_LIST_MODEL_DATA_PROPERTY(Type) \
Q_PROPERTY(QList<Type> listDate READ dateList WRITE setDataList NOTIFY listDateChanged FINAL)
 

template<class TYPE>
class BaseListModel: public __PrvateBaseListModel
{
 
public:
    BaseListModel(QObject* parent = nullptr): __PrvateBaseListModel(parent) {
 
    }
 
    int rowCount(const QModelIndex &) const override {
        return m_data.size();
    }
 
    QHash<int, QByteArray> roleNames() const override {
        QHash<int, QByteArray> roles;
        roles[Qt::EditRole] = "delegateModel";
        return roles;
    }
 
    QVariant data(const QModelIndex &index, int role) const override {
        if (index.isValid() &&
            index.row() < m_data.size() &&
            m_data.size() &&
            role == Qt::EditRole) {
 
            if constexpr  (std::is_same_v<TYPE, QVariant>) {
                return m_data[index.row()];
            } else if constexpr(std::is_base_of_v<QObject, TYPE>) {
                QQmlEngine::setObjectOwnership(m_data[index.row()], QQmlEngine::CppOwnership);
 
                return QVariant::fromValue(m_data[index.row()]);
 
            } else if constexpr (std::is_same_v<TYPE, QSharedPointer<QObject>> ||
                                 std::is_base_of_v<QObject, typename TYPE::element_type>) {
                QObject* ptr = m_data[index.row()].get();
 
                QQmlEngine::setObjectOwnership(ptr, QQmlEngine::CppOwnership);
                return QVariant::fromValue(ptr);
            } else {
                return QVariant::fromValue(m_data[index.row()]);
 
            }
        }
 
        return {};
    }

    Q_INVOKABLE void setDataList(const QList<TYPE> &newData) {
 
        const int diff = newData.size() - m_data.size();
 
        if (diff > 0) {
            beginInsertRows(QModelIndex{}, m_data.size(), m_data.size() + diff - 1);
            m_data = newData;
            endInsertRows();
 
            emit dataChanged(index(0, 0),
                             index(m_data.size() - diff - 1, 0));
        } else if (diff == 0) {
            m_data = newData;
 
            emit dataChanged(index(0, 0),
                             index(m_data.size() - diff - 1, 0));
        } else {
            beginRemoveRows(QModelIndex{}, m_data.size() + diff, m_data.size() - 1);
            m_data = newData;
 
            endRemoveRows();
 
            emit dataChanged(index(0, 0),
                             index(m_data.size() - 1, 0));
        }
 
        emit listDateChanged();
 
    }
 
    Q_INVOKABLE const QList<TYPE>& dateList() const {
        return m_data;
    }
 
private:
    QList<TYPE> m_data;
 
};
 
 
 
}
#endif // BASELISTMODEL_H