qqmlabstractdelegatecomponent_p.h

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// Copyright (C) 2019 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#ifndef QQMLABSTRACTDELEGATECOMPONENT_P_H
#define QQMLABSTRACTDELEGATECOMPONENT_P_H
 
//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
 
#include <private/qtqmlmodelsglobal_p.h>
#include <private/qqmlcomponentattached_p.h>
#include <qqmlcomponent.h>
 
QT_REQUIRE_CONFIG(qml_delegate_model);
 
QT_BEGIN_NAMESPACE
 
// TODO: consider making QQmlAbstractDelegateComponent public API
class QQmlAdaptorModel;
class Q_QMLMODELS_EXPORT QQmlAbstractDelegateComponent : public QQmlComponent
{
    Q_OBJECT
    QML_NAMED_ELEMENT(AbstractDelegateComponent)
    QML_ADDED_IN_VERSION(2, 0)
    QML_UNCREATABLE("Cannot create instance of abstract class AbstractDelegateComponent.")
 
public:
    QQmlAbstractDelegateComponent(QObject *parent = nullptr);
    ~QQmlAbstractDelegateComponent() override;
 
    virtual QQmlComponent *delegate(QQmlAdaptorModel *adaptorModel, int row, int column = 0) const = 0;
    virtual QString role() const = 0;
 
Q_SIGNALS:
    void delegateChanged();
 
protected:
    QVariant value(QQmlAdaptorModel *adaptorModel,int row, int column, const QString &role) const;
};
 
QT_END_NAMESPACE
 
#endif // QQMLABSTRACTDELEGATECOMPONENT_P_H