itemdelegate.h

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/* ============================================================
 *
 * This file is a part of digiKam project
 * https://www.digikam.org
 *
 * Date        : 2009-04-19
 * Description : Qt model-view for items - the delegate
 *
 * Copyright (C) 2009-2011 by Marcel Wiesweg <marcel dot wiesweg at gmx dot de>
 * Copyright (C) 2009-2022 by Gilles Caulier <caulier dot gilles at gmail dot com>
 *
 * 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_ITEM_DELEGATE_H
#define DIGIKAM_ITEM_DELEGATE_H
 
// Local includes
 
#include "itemviewdelegate.h"
#include "thumbnailsize.h"
 
namespace Digikam
{
 
class ItemCategoryDrawer;
class ItemCategorizedView;
class ItemDelegateOverlay;
class ItemFilterModel;
class ItemModel;
class ItemThumbnailModel;
 
class ItemDelegate : public ItemViewDelegate
{
    Q_OBJECT
 
public:
 
    explicit ItemDelegate(QObject* const parent = nullptr);
    ~ItemDelegate()                                                                                    override;
 
    void setView(ItemCategorizedView* view);
 
    ItemCategoryDrawer* categoryDrawer()                                                         const;
 
    QRect commentsRect()                                                                         const;
    QRect tagsRect()                                                                             const;
    QRect actualPixmapRect(const QModelIndex& index)                                             const;
    QRect groupIndicatorRect()                                                                   const;
    QRect coordinatesIndicatorRect()                                                             const;
 
    int calculatethumbSizeToFit(int ws);
 
    void setSpacing(int spacing) override;
    void setDefaultViewOptions(const QStyleOptionViewItem& option)                                     override;
    bool acceptsToolTip(const QPoint& pos, const QRect& visualRect,
                                const QModelIndex& index, QRect* tooltipRect = nullptr)          const override;
    bool acceptsActivation(const QPoint& pos, const QRect& visualRect,
                                   const QModelIndex& index, QRect* activationRect = nullptr)    const override;
 
    QRect pixmapRect()                                                                           const override;
    QRect imageInformationRect()                                                                 const override;
 
    void paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index)  const override;
    QPixmap pixmapForDrag(const QStyleOptionViewItem& option, const QList<QModelIndex>& indexes) const override;
 
    static QPixmap retrieveThumbnailPixmap(const QModelIndex& index, int thumbnailSize);
 
public:
 
    // Declared as public because of use in DigikamItemDelegate class.
    class ItemDelegatePrivate;
 
protected:
 
    virtual void updateContentWidth();
 
    virtual void updateRects() = 0;
 
    void clearCaches() override;
 
    virtual void clearModelDataCaches();
 
    virtual QPixmap thumbnailPixmap(const QModelIndex& index)               const;
 
    bool onActualPixmapRect(const QPoint& pos, const QRect& visualRect,
                            const QModelIndex& index, QRect* actualRect)    const;
    void updateActualPixmapRect(const QModelIndex& index, const QRect& rect);
 
    void invalidatePaintingCache() override;
    void updateSizeRectsAndPixmaps() override;
 
    void setModel(QAbstractItemModel* model);
 
    ItemDelegate(ItemDelegate::ItemDelegatePrivate& dd, QObject* const parent);
 
protected Q_SLOTS:
 
    void modelChanged();
    void modelContentsChanged();
 
private:
 
    Q_DECLARE_PRIVATE(ItemDelegate)
};
 
} // namespace Digikam
 
#endif // DIGIKAM_ITEM_DELEGATE_H