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218 | /* ============================================================
*
* This file is a part of digiKam project
* https://www.digikam.org
*
* Date : 2006-01-20
* Description : image file IO threaded interface.
*
* SPDX-FileCopyrightText: 2005-2013 by Marcel Wiesweg <marcel dot wiesweg at gmx dot de>
* SPDX-FileCopyrightText: 2005-2025 by Gilles Caulier <caulier dot gilles at gmail dot com>
*
* SPDX-License-Identifier: GPL-2.0-or-later
*
* ============================================================ */
#pragma once
// Qt includes
#include <QList>
#include <QEvent>
// Local includes
#include "dimg.h"
#include "dimgloaderobserver.h"
#include "loadingdescription.h"
#include "loadingcache.h"
namespace Digikam
{
class LoadSaveThread;
class LoadSaveTask
{
public:
enum TaskType
{
TaskTypeLoading,
TaskTypeSaving
};
public:
explicit LoadSaveTask(LoadSaveThread* const thread);
virtual ~LoadSaveTask() = default;
public:
virtual void execute() = 0;
virtual TaskType type() = 0;
virtual void progressInfo(float progress) = 0;
virtual bool continueQuery() = 0;
protected:
LoadSaveThread* m_thread = nullptr;
private:
// Disable
LoadSaveTask(const LoadSaveTask&) = delete;
LoadSaveTask& operator=(const LoadSaveTask&) = delete;
};
//---------------------------------------------------------------------------------------------------
class LoadingTask : public LoadSaveTask,
public DImgLoaderObserver
{
public:
enum LoadingTaskStatus
{
LoadingTaskStatusLoading,
LoadingTaskStatusPreloading,
LoadingTaskStatusStopping
};
public:
explicit LoadingTask(LoadSaveThread* const thread,
const LoadingDescription& description,
LoadingTaskStatus loadingTaskStatus = LoadingTaskStatusLoading);
~LoadingTask() override = default;
LoadingTaskStatus status() const;
QString filePath() const;
const LoadingDescription& loadingDescription() const;
// LoadSaveTask
void execute() override;
TaskType type() override;
// DImgLoaderObserver
void progressInfo(float progress) override;
bool continueQuery() override;
void setStatus(LoadingTaskStatus status);
protected:
LoadingDescription m_loadingDescription;
volatile LoadingTaskStatus m_loadingTaskStatus = LoadingTaskStatusLoading;
private:
// Disable
LoadingTask(const LoadingTask&) = delete;
LoadingTask& operator=(const LoadingTask&) = delete;
};
//---------------------------------------------------------------------------------------------------
class SharedLoadingTask : public LoadingTask,
public LoadingProcess,
public LoadingProcessListener
{
public:
explicit SharedLoadingTask(LoadSaveThread* const thread,
const LoadingDescription& description,
LoadSaveThread::AccessMode mode = LoadSaveThread::AccessModeReadWrite,
LoadingTaskStatus loadingTaskStatus = LoadingTaskStatusLoading);
void execute() override;
void progressInfo(float progress) override;
bool needsPostProcessing() const;
virtual void postProcess();
// LoadingProcess
bool completed() const override;
QString cacheKey() const override;
void addListener(LoadingProcessListener* const listener) override;
void removeListener(LoadingProcessListener* const listener) override;
void notifyNewLoadingProcess(LoadingProcess* const process,
const LoadingDescription& description) override;
// LoadingProcessListener
bool querySendNotifyEvent() const override;
void setResult(const LoadingDescription& loadingDescription,
const DImg& img) override;
LoadSaveNotifier* loadSaveNotifier() const override;
LoadSaveThread::AccessMode accessMode() const override;
DImg img() const;
protected:
volatile bool m_completed = false;
LoadSaveThread::AccessMode m_accessMode = LoadSaveThread::AccessModeReadWrite;
QList<LoadingProcessListener*> m_listeners;
DImg m_img;
private:
// Disable
SharedLoadingTask(const SharedLoadingTask&) = delete;
SharedLoadingTask& operator=(const SharedLoadingTask&) = delete;
};
//---------------------------------------------------------------------------------------------------
class SavingTask : public LoadSaveTask,
public DImgLoaderObserver
{
public:
enum SavingTaskStatus
{
SavingTaskStatusSaving,
SavingTaskStatusStopping
};
public:
explicit SavingTask(LoadSaveThread* const thread,
const DImg& img,
const QString& filePath,
const QString& format);
SavingTaskStatus status() const;
QString filePath() const;<--- Function 'filePath()' should return member 'm_filePath' by const reference.
public:
void execute() override;
TaskType type() override;
void progressInfo(float progress) override;
bool continueQuery() override;
void setStatus(SavingTaskStatus status);
private:
QString m_filePath;
QString m_format;
DImg m_img;
volatile SavingTaskStatus m_savingTaskStatus = SavingTaskStatusSaving;
private:
// Disable
SavingTask(const SavingTask&) = delete;
SavingTask& operator=(const SavingTask&) = delete;
};
} // namespace Digikam
|