ditemdelegate.h

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/* ============================================================
 *
 * This file is a part of digiKam project
 * https://www.digikam.org
 *
 * Date        : 2010-01-16
 * Description : Qt item view for images - common delegate code
 *
 * Copyright (C) 2009-2011 by Marcel Wiesweg <marcel dot wiesweg at gmx dot de>
 *
 * 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_DITEM_DELEGATE_H
#define DIGIKAM_DITEM_DELEGATE_H
 
// Qt includes
 
#include <QAbstractItemDelegate>
 
// Local includes
 
#include "digikam_export.h"
#include "thumbnailsize.h"
 
namespace Digikam
{
 
class ItemViewCategorized;
 
class DIGIKAM_EXPORT DItemDelegate : public QAbstractItemDelegate
{
    Q_OBJECT
 
public:
 
    explicit DItemDelegate(QObject* const parent = nullptr);
    ~DItemDelegate() override;
 
    virtual QSize gridSize() const = 0;
    virtual QPixmap pixmapForDrag(const QStyleOptionViewItem& option, const QList<QModelIndex>& indexes) const = 0;
 
    virtual void setThumbnailSize(const ThumbnailSize& thumbSize) = 0;
    virtual void setSpacing(int spacing) = 0;
 
    virtual void setDefaultViewOptions(const QStyleOptionViewItem& option) = 0;
 
    virtual bool acceptsToolTip(const QPoint& pos, const QRect& visualRect,
                                const QModelIndex& index, QRect* tooltipRect = nullptr) const = 0;
    virtual bool acceptsActivation(const QPoint& pos, const QRect& visualRect,
                                   const QModelIndex& index, QRect* activationRect = nullptr) const = 0;
 
    virtual void mouseMoved(QMouseEvent* e, const QRect& visualRect, const QModelIndex& index) = 0;
 
    static QString squeezedText(const QFontMetrics& fm, int width, const QString& text);
    static QString dateToString(const QDateTime& datetime);
    static QPixmap makeDragPixmap(const QStyleOptionViewItem& option, const QList<QModelIndex>& indexes,
                                  const QPixmap& suggestedPixmap = QPixmap());
 
Q_SIGNALS:
 
    void gridSizeChanged(const QSize& newSize);
    void visualChange();
 
protected:
 
    virtual void clearCaches();
 
    QString squeezedTextCached(QPainter* const p, int width, const QString& text) const;
    QPixmap thumbnailBorderPixmap(const QSize& pixSize, bool isGrouped = false) const;
 
private:
 
    class Private;
    Private* const d;
};
 
} // namespace Digikam
 
#endif // DIGIKAM_DITEM_DELEGATE_H