dwitemdelegatepool.h

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/* ============================================================
 *
 * This file is a part of digiKam project
 * https://www.digikam.org
 *
 * Date        : 2007-11-15
 * Description : widget item delegate for setup collection view
 *
 * Copyright (C) 2015-2022 by Gilles Caulier <caulier dot gilles at gmail dot com>
 * Copyright (C) 2007-2008 by Rafael Fernández López <ereslibre at kde dot org>
 * Copyright (C) 2008      by Kevin Ottens <ervin at kde dot org>
 *
 * This program is free software; you can redistribute it
 * and/or modify it under the terms of the GNU General
 * Public License as published by the Free Software Foundation;
 * either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * ============================================================ */
 
#ifndef DIGIKAM_DW_ITEM_DELEGATE_POOL_H
#define DIGIKAM_DW_ITEM_DELEGATE_POOL_H
 
// Qt includes
 
#include <QModelIndex>
#include <QHash>
#include <QList>
 
// Local includes
 
#include "digikam_export.h"
 
class QWidget;
class QStyleOptionViewItem;
 
namespace Digikam
{
 
class DWItemDelegate;
class DWItemDelegatePoolPrivate;
 
class DIGIKAM_GUI_EXPORT DWItemDelegatePool
{
public:
 
    enum UpdateWidgetsEnum
    {
        UpdateWidgets = 0,
        NotUpdateWidgets
    };
 
public:
 
    explicit DWItemDelegatePool(DWItemDelegate* const delegate);
    ~DWItemDelegatePool();
 
    QList<QWidget*> findWidgets(const QPersistentModelIndex& index, const QStyleOptionViewItem& option,
                                UpdateWidgetsEnum updateWidgets = UpdateWidgets) const;
 
    QList<QWidget*> invalidIndexesWidgets() const;
 
    void fullClear();
 
private:
 
    // Disable
    DWItemDelegatePool(const DWItemDelegatePool&)            = delete;
    DWItemDelegatePool& operator=(const DWItemDelegatePool&) = delete;
 
private:
 
    friend class DWItemDelegate;
    friend class DWItemDelegatePrivate;
 
    DWItemDelegatePoolPrivate* const d;
};
 
// -----------------------------------------------------------------------------------------------------------
 
class DWItemDelegateEventListener;
 
class DWItemDelegatePoolPrivate
{
public:
 
    explicit DWItemDelegatePoolPrivate(DWItemDelegate* const d);
 
public:
 
    DWItemDelegate*                                delegate;
    DWItemDelegateEventListener*                   eventListener;
 
    QList<QList<QWidget*> >                        allocatedWidgets;
    QHash<QPersistentModelIndex, QList<QWidget*> > usedWidgets;
    QHash<QWidget*, QPersistentModelIndex>         widgetInIndex;
 
    bool                                           clearing;
 
private:
 
    // Disable
    DWItemDelegatePoolPrivate(const DWItemDelegatePoolPrivate&)            = delete;
    DWItemDelegatePoolPrivate& operator=(const DWItemDelegatePoolPrivate&) = delete;
};
 
} // namespace Digikam
 
#endif // DIGIKAM_DW_ITEM_DELEGATE_POOL_H