delegaterecycler.h

/*
 *  SPDX-FileCopyrightText: 2018 Marco Martin <[email protected]>
 *
 *  SPDX-License-Identifier: LGPL-2.0-or-later
 */

#ifndef DELEGATERECYCLER_H
#define DELEGATERECYCLER_H

#include <QQuickItem>
#include <QVariant>
#include <QPointer>


class DelegateCache;

class DelegateRecyclerAttached : public QObject
{
    Q_OBJECT

public:
    DelegateRecyclerAttached(QObject *parent = nullptr);
    ~DelegateRecyclerAttached();



Q_SIGNALS:
    void pooled();
    void reused();


};

class DelegateRecycler : public QQuickItem
{
    Q_OBJECT

    Q_PROPERTY(QQmlComponent *sourceComponent READ sourceComponent WRITE setSourceComponent RESET resetSourceComponent NOTIFY sourceComponentChanged)

public:
    DelegateRecycler(QQuickItem *parent = nullptr);
    ~DelegateRecycler();


    QQmlComponent *sourceComponent() const;
    void setSourceComponent(QQmlComponent *component);
    void resetSourceComponent();

    static DelegateRecyclerAttached *qmlAttachedProperties(QObject *object);

protected:
    void geometryChanged(const QRectF &newGeometry, const QRectF &oldGeometry) override;
    void focusInEvent(QFocusEvent *event) override;

    void updateHints();
    void updateSize(bool parentResized);

Q_SIGNALS:
    void sourceComponentChanged();

private Q_SLOTS:
    void syncIndex();
    void syncModel();
    void syncModelProperties();
    void syncModelData();

private:
    QPointer<QQmlComponent> m_sourceComponent;
    QPointer<QQuickItem> m_item;
    QObject *m_propertiesTracker = nullptr;
    bool m_updatingSize = false;
    bool m_widthFromItem = false;
    bool m_heightFromItem = false;
};

QML_DECLARE_TYPEINFO(DelegateRecycler, QML_HAS_ATTACHED_PROPERTIES)

#endif