CFilePreviewGuiComp.h

Go to the documentation of this file.

/********************************************************************************
**  This file is part of the ICF Framework. Copyright (C) Witold Gantzke & Kirill Lepskiy
**  ICF Framework may be used under the terms of the LGPL License v. 2.1 by the Free Software Foundation.
********************************************************************************/
 
#ifndef ifilegui_CFilePreviewGuiComp_included
#define ifilegui_CFilePreviewGuiComp_included
 
 
// Qt includes
#include <QtCore/QFileSystemWatcher>
#include <QtCore/QTimer>
#include <QtCore/QDateTime>
#include <QtCore/QFutureWatcher>
#include <QtWidgets/QGraphicsView>
 
// ICF includes
#include <istd/CSingleAsyncCaller.h>
#include <ifile/IFilePersistence.h>
#include <ifile/IFileNameParam.h>
#include <istdgui/TDesignerGuiObserverCompBase.h>
 
#include <GeneratedFiles/ifilegui/ui_CFilePreviewGuiComp.h>
 
 
namespace ifilegui
{
 
 
class CFilePreviewGuiComp: public istdgui::TDesignerGuiObserverCompBase<Ui::CFilePreviewGuiComp, ifile::IFileNameParam>
{
    Q_OBJECT
 
public:
    typedef istdgui::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_isAsyncLoadEnabledAttrPtr, "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 (istdgui::TGuiObserverWrap)
    void OnGuiModelAttached() override;
    void OnGuiModelDetached() override;
    void UpdateGui(const istd::IChangeable::ChangeSet& changeSet) override;
 
    // reimplemented (istdgui::CGuiComponentBase)
    void OnGuiCreated() override;
    void OnGuiDestroyed() override;
    void OnGuiRetranslate() override;
 
    // reimplemented (icomp::CComponentBase)
    void OnComponentCreated() override;
 
Q_SIGNALS:
    void PreviewGenerationFinished(bool isSuccess);
 
private Q_SLOTS:
    void UpdateFilePreview();
    void OnPreviewGenerationFinished(bool isSuccess);
 
private:
    iproc::CTaskState UpdateObjectFromFile(QString filePath);
    void ResetPreview();
 
protected:
    class PreviewWidget: public QGraphicsView
    {
    public:
        explicit PreviewWidget(QWidget* parent = nullptr);
 
    protected:
        // reimplemented (QWidget)
        void resizeEvent(QResizeEvent* eventPtr);
    };
 
protected:
    I_REF(ifile::IFilePersistence, m_fileLoaderCompPtr);
    I_FACT(istd::IChangeable, m_objectFactoryCompPtr);
    I_REF(imod::IObserver, m_objectObserverCompPtr);
    I_REF(istdgui::IGuiObject, m_objectGuiCompPtr);
    I_REF(istd::IChangeable, m_currentPreviewObjectCompPtr);
    I_ATTR(bool, m_isAsyncLoadEnabledAttrPtr);
    I_TEXTATTR(m_noAvailableLabelAttrPtr);
    I_ATTR(QByteArray, m_noAvailableIconPathAttrPtr);
 
    QFileSystemWatcher m_fileSystemObserver;
 
    QDateTime m_lastModificationTimeStamp;
    QString m_lastFilePath;
 
    std::unique_ptr<istd::IChangeable> m_previewObjectPtr;
    std::unique_ptr<istd::IChangeable> m_workingObjectPtr;
 
    QMutex m_mutex;
 
    iproc::CTaskState m_loadState;
 
    istd::CSingleAsyncCaller m_asyncCaller;
    QTimer m_timer;
};
 
 
} // namespace ifilegui
 
 
#endif // !ifilegui_CFilePreviewGuiComp_included