IndexedSpiralItem.h

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// Copyright (C) 2024 Stan Morris.

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

#ifndef INDEXEDSPIRALITEM_H

#define INDEXEDSPIRALITEM_H

#include <QQuickItem>

class QSGGeometry;

class QSGGeometryNode;

class IndexedSpiralItem : public QQuickItem

    Q_OBJECT

    Q_PROPERTY(int indexCount READ indexCount WRITE setIndexCount NOTIFY indexCountChanged FINAL)

    Q_PROPERTY(int maxIndices READ maxIndices CONSTANT FINAL)

    QML_ELEMENT

public:

    IndexedSpiralItem();

signals:

    void indexCountChanged();

protected:

    QSGNode *updatePaintNode(QSGNode *, UpdatePaintNodeData *);

private:

    bool applyIndexChange(QSGGeometryNode *);

    void configureGeometryNode(QSGGeometryNode *);

    QSGGeometry *createGeometry() const;

    void configureGeometry(QSGGeometry *) const;

    void configureColors(QSGGeometry *) const;

    int indexCount() const;

    void setIndexCount(int newIndexCount);

    int maxIndices() const;

    const int m_maxVertices {16000};

    const int m_maxIndices {m_maxVertices};

    int m_indexCount {m_maxVertices};

    bool m_growFromCenter {true};

};

#endif // INDEXEDSPIRALITEM_H