CFilePreviewGuiComp.h

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// SPDX-License-Identifier: LGPL-2.1-or-later OR GPL-2.0-or-later OR GPL-3.0-or-later OR LicenseRef-ACF-Commercial
#pragma once
 
 
// Qt includes
 
#include <QtCore/QFileSystemWatcher>
#include <QtCore/QTimer>
#include <QtCore/QDateTime>
 
#include <QtCore/QFutureWatcher>
#if QT_VERSION >= 0x050000
#include <QtWidgets/QGraphicsView>
#else
#include <QtGui/QGraphicsView>
#endif
 
// ACF includes
#include <ifile/IFilePersistence.h>
#include <ifile/IFileNameParam.h>
#include <iqtgui/TDesignerGuiObserverCompBase.h>
 
#include <GeneratedFiles/ifilegui/ui_CFilePreviewGuiComp.h>
 
 
namespace ifilegui
{
 
 
class CFilePreviewGuiComp:
                     public iqtgui::TDesignerGuiObserverCompBase<
                                          Ui::CFilePreviewGuiComp, ifile::IFileNameParam>
{
       Q_OBJECT
 
public:
       typedef iqtgui::TDesignerGuiObserverCompBase<
                            Ui::CFilePreviewGuiComp, ifile::IFileNameParam> BaseClass;
 
       I_BEGIN_COMPONENT(CFilePreviewGuiComp);
              I_ASSIGN(m_fileLoaderCompPtr, "FileLoader", "Object loader", true, "FileLoader");
              I_ASSIGN(m_objectFactoryCompPtr, "ObjectFactory", "Factory for creation of data object to be previewed", true, "ObjectFactory");
              I_ASSIGN(m_currentPreviewObjectCompPtr, "CurrentPreviewObject", "Current object will be copied here if set", false, "CurrentPreviewObject");
              I_ASSIGN(m_objectObserverCompPtr, "ObjectView", "View component for the object", true, "ObjectView");
              I_ASSIGN_TO(m_objectGuiCompPtr, m_objectObserverCompPtr, true);
              I_ASSIGN(m_isAsynchronPreviewGenerationEnabledAttrPtr, "AsynchronPreviewGenerationEnabled", "If enabled, the preview generation will be done in a separate thread", true, true);
              I_ASSIGN(m_noAvailableLabelAttrPtr, "NoAvailableLabel", "Text used for no available preview state", false, "");
              I_ASSIGN(m_noAvailableIconPathAttrPtr, "NoAvailableIconPath", "Path to the icon used for no available preview state", false, "");
       I_END_COMPONENT;
 
       CFilePreviewGuiComp();
 
protected:
       // reimplemented (iqtgui::TGuiObserverWrap)
       virtual void OnGuiModelAttached() override;
       virtual void OnGuiModelDetached() override;
       virtual void UpdateGui(const istd::IChangeable::ChangeSet& changeSet) override;
 
       // reimplemented (iqtgui::CGuiComponentBase)
       virtual void OnGuiCreated() override;
       virtual void OnGuiDestroyed() override;
       virtual void OnGuiRetranslate() override;
 
       // reimplemented (icomp::CComponentBase)
       virtual void OnComponentCreated() override;
 
private Q_SLOTS:
       void UpdateFilePreview();
       void OnPreviewGenerationFinished();
 
private:
       void UpdateObjectFromFile();
       void ResetPreview();
       
protected:
       class PreviewWidget : public QGraphicsView
       {
       public:
              explicit PreviewWidget(QWidget *parent = NULL);
 
       protected:
              // reimplemented (QWidget)
              virtual void resizeEvent(QResizeEvent* eventPtr) override;
       };
 
protected:
       I_REF(ifile::IFilePersistence, m_fileLoaderCompPtr);
       I_FACT(istd::IChangeable, m_objectFactoryCompPtr);
       I_REF(imod::IObserver, m_objectObserverCompPtr);
       I_REF(iqtgui::IGuiObject, m_objectGuiCompPtr);   
       I_REF(istd::IChangeable, m_currentPreviewObjectCompPtr);
       I_ATTR(bool, m_isAsynchronPreviewGenerationEnabledAttrPtr);
       I_TEXTATTR(m_noAvailableLabelAttrPtr);
       I_ATTR(QByteArray, m_noAvailableIconPathAttrPtr);
 
       QFileSystemWatcher m_fileSystemObserver;
 
       QDateTime m_lastModificationTimeStamp;
       QString m_lastFilePath;
 
       QFutureWatcher<void> m_previewGenerationWatcher;
 
       istd::IChangeableUniquePtr m_previewObjectPtr;
       istd::IChangeableUniquePtr m_workingObjectPtr;
 
       QMutex m_mutex;
 
       bool m_previewWasGenerated;
       QTimer m_timer;
};
 
 
} // namespace ifilegui