previewlist.h

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/* ============================================================
 *
 * This file is a part of digiKam project
 * https://www.digikam.org
 *
 * Date        : 2010-02-13
 * Description : a list of selectable options with preview
 *               effects as thumbnails.
 *
 * Copyright (C) 2010-2022 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_PREVIEW_LIST_H
#define DIGIKAM_PREVIEW_LIST_H
 
// Qt includes
 
#include <QObject>
#include <QPixmap>
#include <QListWidget>
#include <QListWidgetItem>
 
// Local includes
 
#include "digikam_export.h"
 
namespace Digikam
{
 
class DImgThreadedFilter;
 
class DIGIKAM_EXPORT PreviewThreadWrapper : public QObject
{
    Q_OBJECT
 
public:
 
    explicit PreviewThreadWrapper(QObject* const parent = nullptr);
    ~PreviewThreadWrapper() override;
 
    void registerFilter(int id, DImgThreadedFilter* const filter);
 
    void startFilters();
    void stopFilters();
 
Q_SIGNALS:
 
    void signalFilterStarted(int);
    void signalFilterFinished(int, const QPixmap&);
 
private Q_SLOTS:
 
    void slotFilterStarted();
    void slotFilterFinished(bool success);
    void slotFilterProgress(int progress);
 
private:
 
    class Private;
    Private* const d;
};
 
// -------------------------------------------------------------------
 
class DIGIKAM_EXPORT PreviewListItem : public QListWidgetItem
{
 
public:
 
    explicit PreviewListItem(QListWidget* const parent = nullptr);
    ~PreviewListItem()    override;
 
    void setPixmap(const QPixmap& pix);
 
    void setId(int id);
    int  id()       const;
 
    void setBusy(bool b);
    bool isBusy()   const;
 
private:
 
    class Private;
    Private* const d;
 
private:
 
    Q_DISABLE_COPY(PreviewListItem)
};
 
// -------------------------------------------------------------------
 
class DIGIKAM_EXPORT PreviewList : public QListWidget
{
    Q_OBJECT
 
public:
 
    explicit PreviewList(QWidget* const parent = nullptr);
    ~PreviewList()                            override;
 
    PreviewListItem* addItem(DImgThreadedFilter* const filter, const QString& txt, int id);
 
    void setCurrentId(int id);
    int  currentId()                    const;
 
    void startFilters();
    void stopFilters();
 
private Q_SLOTS:
 
    void slotProgressTimerDone();
    void slotFilterStarted(int);
    void slotFilterFinished(int, const QPixmap&);
 
private:
 
    PreviewListItem* findItem(int id)   const;
 
private:
 
    class Private;
    Private* const d;
};
 
} // namespace Digikam
 
#endif // DIGIKAM_PREVIEW_LIST_H