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diff --git a/digikam/libs/threadimageio/loadsavetask.h b/digikam/libs/threadimageio/loadsavetask.h
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+++ b/digikam/libs/threadimageio/loadsavetask.h
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+/* ============================================================
+ *
+ * This file is a part of digiKam project
+ * http://www.digikam.org
+ *
+ * Date        : 2006-01-20
+ * Description : image file IO threaded interface.
+ *
+ * Copyright (C) 2005-2007 by Marcel Wiesweg <marcel.wiesweg@gmx.de>
+ * Copyright (C) 2005-2007 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 LOAD_SAVE_TASK_H
+#define LOAD_SAVE_TASK_H
+
+// Qt includes.
+
+#include <qevent.h>
+
+// Local includes.
+
+#include "dimg.h"
+#include "dimgloaderobserver.h"
+#include "loadingdescription.h"
+#include "loadingcache.h"
+
+namespace Digikam
+{
+
+class LoadSaveThread;
+
+class LoadSaveTask
+{
+public:
+
+    LoadSaveTask(LoadSaveThread* thread)
+        : m_thread(thread)
+        {};
+    virtual ~LoadSaveTask() {};
+
+    virtual void execute() = 0;
+
+    enum TaskType
+    {
+        TaskTypeLoading,
+        TaskTypeSaving
+    };
+
+    virtual TaskType type() = 0;
+
+protected:
+
+    LoadSaveThread *m_thread;
+};
+
+//---------------------------------------------------------------------------------------------------
+
+class NotifyEvent : public QCustomEvent
+{
+public:
+
+    static QEvent::Type notifyEventId()
+        { return QEvent::User; };
+
+    NotifyEvent() : QCustomEvent(notifyEventId()) {};
+
+    virtual void notify(LoadSaveThread *thread) = 0;
+};
+
+//---------------------------------------------------------------------------------------------------
+
+class ProgressEvent : public NotifyEvent
+{
+public:
+
+    ProgressEvent(float progress)
+        : m_progress(progress)
+        {};
+
+protected:
+
+    float m_progress;
+};
+
+//---------------------------------------------------------------------------------------------------
+
+class LoadingProgressEvent : public ProgressEvent
+{
+public:
+
+    LoadingProgressEvent(const LoadingDescription &loadingDescription, float progress)
+        : ProgressEvent(progress),
+          m_loadingDescription(loadingDescription)
+        {};
+
+    virtual void notify(LoadSaveThread *thread);
+
+private:
+
+    LoadingDescription m_loadingDescription;
+};
+
+//---------------------------------------------------------------------------------------------------
+
+class SavingProgressEvent : public ProgressEvent
+{
+public:
+
+    SavingProgressEvent(const QString& filePath, float progress)
+        : ProgressEvent(progress),
+          m_filePath(filePath)
+        {};
+
+    virtual void notify(LoadSaveThread *thread);
+
+private:
+
+    QString m_filePath;
+};
+
+//---------------------------------------------------------------------------------------------------
+
+class StartedLoadingEvent : public NotifyEvent
+{
+public:
+
+    StartedLoadingEvent(const LoadingDescription &loadingDescription)
+        : m_loadingDescription(loadingDescription)
+        {};
+
+    virtual void notify(LoadSaveThread *thread);
+
+private:
+
+    LoadingDescription m_loadingDescription;
+};
+
+//---------------------------------------------------------------------------------------------------
+
+class StartedSavingEvent : public NotifyEvent
+{
+public:
+
+    StartedSavingEvent(const QString& filePath)
+    : m_filePath(filePath)
+    {};
+
+    virtual void notify(LoadSaveThread *thread);
+
+private:
+
+    QString m_filePath;
+};
+
+//---------------------------------------------------------------------------------------------------
+
+class LoadedEvent : public NotifyEvent
+{
+public:
+
+    LoadedEvent(const LoadingDescription &loadingDescription, DImg &img)
+        : m_loadingDescription(loadingDescription), m_img(img)
+        {};
+
+    virtual void notify(LoadSaveThread *thread);
+
+private:
+
+    LoadingDescription m_loadingDescription;
+    DImg    m_img;
+};
+
+//---------------------------------------------------------------------------------------------------
+
+class MoreCompleteLoadingAvailableEvent : public NotifyEvent
+{
+public:
+
+    MoreCompleteLoadingAvailableEvent(const LoadingDescription &oldLoadingDescription,
+                                      const LoadingDescription &newLoadingDescription)
+        : m_oldDescription(oldLoadingDescription), m_newDescription(newLoadingDescription)
+        {};
+
+    virtual void notify(LoadSaveThread *thread);
+
+private:
+
+    LoadingDescription m_oldDescription;
+    LoadingDescription m_newDescription;
+};
+
+//---------------------------------------------------------------------------------------------------
+
+class LoadingTask : public LoadSaveTask, public DImgLoaderObserver
+{
+public:
+
+    enum LoadingTaskStatus
+    {
+        LoadingTaskStatusLoading,
+        LoadingTaskStatusPreloading,
+        LoadingTaskStatusStopping
+    };
+
+    LoadingTask(LoadSaveThread* thread, LoadingDescription description,
+                LoadingTaskStatus loadingTaskStatus = LoadingTaskStatusLoading)
+        : LoadSaveTask(thread), m_loadingDescription(description), m_loadingTaskStatus(loadingTaskStatus)
+        {}
+
+    // LoadSaveTask
+
+    virtual void execute();
+    virtual TaskType type();
+
+    // DImgLoaderObserver
+
+    virtual void progressInfo(const DImg *, float progress);
+    virtual bool continueQuery(const DImg *);
+    virtual bool isShuttingDown();
+
+    virtual void setStatus(LoadingTaskStatus status);
+
+    LoadingTaskStatus status() const
+    {
+        return m_loadingTaskStatus;
+    }
+
+    QString filePath() const
+    {
+        return m_loadingDescription.filePath;
+    }
+
+    LoadingDescription loadingDescription() const
+    {
+        return m_loadingDescription;
+    }
+
+protected:
+
+    LoadingDescription m_loadingDescription;
+    LoadingTaskStatus m_loadingTaskStatus;
+};
+
+//---------------------------------------------------------------------------------------------------
+
+class SharedLoadingTask : public LoadingTask, public LoadingProcess, public LoadingProcessListener
+{
+public:
+
+    SharedLoadingTask(LoadSaveThread* thread, LoadingDescription description,
+                      LoadSaveThread::AccessMode mode = LoadSaveThread::AccessModeReadWrite,
+                      LoadingTaskStatus loadingTaskStatus = LoadingTaskStatusLoading)
+        : LoadingTask(thread, description, loadingTaskStatus),
+          m_accessMode(mode), m_completed(false), m_usedProcess(0)
+        {}
+
+    virtual void execute();
+    virtual void progressInfo(const DImg *, float progress);
+    virtual bool continueQuery(const DImg *);
+    virtual void setStatus(LoadingTaskStatus status);
+
+    // LoadingProcess
+
+    virtual bool completed();
+    virtual QString filePath();
+    virtual QString cacheKey();
+    virtual void addListener(LoadingProcessListener *listener);
+    virtual void removeListener(LoadingProcessListener *listener);
+    virtual void notifyNewLoadingProcess(LoadingProcess *process, LoadingDescription description);
+
+    // LoadingProcessListener
+
+    virtual bool querySendNotifyEvent();
+    virtual QObject *eventReceiver();
+    virtual LoadSaveThread::AccessMode accessMode();
+
+protected:
+
+    LoadSaveThread::AccessMode m_accessMode;
+    bool m_completed;
+    LoadingProcess *m_usedProcess;
+    QPtrList<LoadingProcessListener> m_listeners;
+};
+
+//---------------------------------------------------------------------------------------------------
+
+class SavedEvent : public NotifyEvent
+{
+public:
+
+    SavedEvent(const QString &filePath, bool success)
+        : m_filePath(filePath), m_success(success)
+        {};
+
+    virtual void notify(LoadSaveThread *thread);
+
+private:
+
+    QString m_filePath;
+    bool m_success;
+};
+
+//---------------------------------------------------------------------------------------------------
+
+class SavingTask : public LoadSaveTask, public DImgLoaderObserver
+{
+public:
+
+    enum SavingTaskStatus
+    {
+        SavingTaskStatusSaving,
+        SavingTaskStatusStopping
+    };
+
+    SavingTask(LoadSaveThread* thread, DImg &img, const QString &filePath, const QString &format)
+        : LoadSaveTask(thread), m_img(img), m_filePath(filePath), m_format(format)
+        {};
+
+    virtual void execute();
+    virtual TaskType type();
+
+    virtual void progressInfo(const DImg *, float progress);
+    virtual bool continueQuery(const DImg *);
+
+    virtual void setStatus(SavingTaskStatus status);
+
+    SavingTaskStatus status() const
+    {
+        return m_savingTaskStatus;
+    }
+
+    QString filePath() const
+    {
+        return m_filePath;
+    }
+
+private:
+
+    DImg        m_img;
+    QString     m_filePath;
+    QString     m_format;
+    SavingTaskStatus m_savingTaskStatus;
+};
+
+}   // namespace Digikam
+
+#endif // LOAD_SAVE_TASK_H