xymappermodel.h - mozsearch

// Copyright (C) 2026 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only

#ifndef XYMAPPERMODEL_H

#define XYMAPPERMODEL_H

#include <QtCore/qabstractitemmodel.h>

#include <QtCore/qlist.h>

#include <QtQmlIntegration/qqmlintegration.h>

// Table model (x, y, spare columns) for exercising QXYModelMapper.

//

// With resetOnStructuralChange enabled, insertRows()/removeRows() additionally report a model

// reset, like some custom and QML models do. The mapper calls these when the series is edited, so

// this is the case where it must not rebuild the whole series.

class XYMapperModel : public QAbstractTableModel

    Q_OBJECT

    Q_PROPERTY(bool resetOnStructuralChange READ resetOnStructuralChange WRITE

                   setResetOnStructuralChange NOTIFY resetOnStructuralChangeChanged FINAL)

    Q_PROPERTY(int modelResetCount READ modelResetCount NOTIFY modelResetCountChanged FINAL)

    QML_ELEMENT

public:

    explicit XYMapperModel(QObject *parent = nullptr);

    int rowCount(const QModelIndex &parent = {}) const override;

    int columnCount(const QModelIndex &parent = {}) const override;

    QVariant headerData(int section,

                        Qt::Orientation orientation,

                        int role = Qt::DisplayRole) const override;

    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;

    bool setData(const QModelIndex &index, const QVariant &value, int role = Qt::EditRole) override;

    Qt::ItemFlags flags(const QModelIndex &index) const override;

    bool insertRows(int row, int count, const QModelIndex &parent = {}) override;

    bool removeRows(int row, int count, const QModelIndex &parent = {}) override;

    bool resetOnStructuralChange() const { return m_resetOnStructuralChange; }

    void setResetOnStructuralChange(bool enable);

    int modelResetCount() const { return m_modelResetCount; }

    // Edits made "from outside", i.e. not on behalf of the mapper. These never emit a reset.

    Q_INVOKABLE void addRow(qreal x, qreal y);

    Q_INVOKABLE void removeLastRow();

    Q_INVOKABLE void editCell(int row, int column, qreal value);

    // Changes data without telling anybody. Use together with resetNow().

    Q_INVOKABLE void setCellSilently(int row, int column, qreal value);

    Q_INVOKABLE void resetNow();

Q_SIGNALS:

    void resetOnStructuralChangeChanged();

    void modelResetCountChanged();

private:

    void reportReset();

    QList<QList<qreal>> m_data;

    int m_modelResetCount = 0;

    bool m_resetOnStructuralChange = true;

};

#endif // XYMAPPERMODEL_H