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/* $Id$ */
/** @file
* VBox Qt GUI - Qt extensions: QIWithRetranslateUI class declaration.
*/
/*
* Copyright (C) 2008-2022 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*/
#ifndef FEQT_INCLUDED_SRC_globals_QIWithRetranslateUI_h
#define FEQT_INCLUDED_SRC_globals_QIWithRetranslateUI_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif
/* Qt includes: */
#include <QApplication>
#include <QDialog>
#include <QEvent>
#include <QGraphicsWidget>
#include <QObject>
#include <QWidget>
/* GUI includes: */
#include "UILibraryDefs.h"
/** Template for automatic language translations of underlying QWidget. */
template <class Base>
class QIWithRetranslateUI : public Base
{
public:
/** Constructs translatable widget passing @a pParent to the base-class. */
QIWithRetranslateUI(QWidget *pParent = 0) : Base(pParent)
{
qApp->installEventFilter(this);
}
protected:
/** Pre-handles standard Qt @a pEvent for passed @a pObject. */
virtual bool eventFilter(QObject *pObject, QEvent *pEvent)
{
/* Handle LanguageChange events for qApp or this object: */
if (pObject == qApp || pObject == this)
{
switch (pEvent->type())
{
case QEvent::LanguageChange: retranslateUi(); break;
default: break;
}
}
/* Call to base-class: */
return Base::eventFilter(pObject, pEvent);
}
/** Handles translation event. */
virtual void retranslateUi() = 0;
};
/** Explicit QIWithRetranslateUI instantiation for QWidget & QDialog classes.
* @note On Windows it's important that all template cases are instantiated just once across
* the linking space. In case we have particular template case instantiated from both
* library and executable sides, - we have multiple definition case and need to strictly
* ask compiler to do it just once and link such cases against library only.
* I would also note that it would be incorrect to just make whole the template exported
* to library because latter can have lack of required instantiations (current case). */
template class SHARED_LIBRARY_STUFF QIWithRetranslateUI<QWidget>;
template class SHARED_LIBRARY_STUFF QIWithRetranslateUI<QDialog>;
/** Template for automatic language translations of underlying QWidget with certain flags. */
template <class Base>
class QIWithRetranslateUI2 : public Base
{
public:
/** Constructs translatable widget passing @a pParent and @a enmFlags to the base-class. */
QIWithRetranslateUI2(QWidget *pParent = 0, Qt::WindowFlags enmFlags = Qt::WindowFlags()) : Base(pParent, enmFlags)
{
qApp->installEventFilter(this);
}
protected:
/** Pre-handles standard Qt @a pEvent for passed @a pObject. */
virtual bool eventFilter(QObject *pObject, QEvent *pEvent)
{
/* Handle LanguageChange events for qApp or this object: */
if (pObject == qApp || pObject == this)
{
switch (pEvent->type())
{
case QEvent::LanguageChange: retranslateUi(); break;
default: break;
}
}
/* Call to base-class: */
return Base::eventFilter(pObject, pEvent);
}
/** Handles translation event. */
virtual void retranslateUi() = 0;
};
/** Template for automatic language translations of underlying QObject. */
template <class Base>
class QIWithRetranslateUI3 : public Base
{
public:
/** Constructs translatable widget passing @a pParent to the base-class. */
QIWithRetranslateUI3(QObject *pParent = 0)
: Base(pParent)
{
qApp->installEventFilter(this);
}
protected:
/** Pre-handles standard Qt @a pEvent for passed @a pObject. */
virtual bool eventFilter(QObject *pObject, QEvent *pEvent)
{
/* Handle LanguageChange events for qApp or this object: */
if (pObject == qApp || pObject == this)
{
switch (pEvent->type())
{
case QEvent::LanguageChange: retranslateUi(); break;
default: break;
}
}
/* Call to base-class: */
return Base::eventFilter(pObject, pEvent);
}
/** Handles translation event. */
virtual void retranslateUi() = 0;
};
/** Explicit QIWithRetranslateUI3 instantiation for QObject class.
* @note On Windows it's important that all template cases are instantiated just once across
* the linking space. In case we have particular template case instantiated from both
* library and executable sides, - we have multiple definition case and need to strictly
* ask compiler to do it just once and link such cases against library only.
* I would also note that it would be incorrect to just make whole the template exported
* to library because latter can have lack of required instantiations (current case). */
template class SHARED_LIBRARY_STUFF QIWithRetranslateUI3<QObject>;
/** Template for automatic language translations of underlying QGraphicsWidget. */
template <class Base>
class QIWithRetranslateUI4 : public Base
{
public:
/** Constructs translatable widget passing @a pParent to the base-class. */
QIWithRetranslateUI4(QGraphicsWidget *pParent = 0)
: Base(pParent)
{
qApp->installEventFilter(this);
}
protected:
/** Pre-handles standard Qt @a pEvent for passed @a pObject. */
virtual bool eventFilter(QObject *pObject, QEvent *pEvent)
{
/* Handle LanguageChange events for qApp or this object: */
if (pObject == qApp || pObject == this)
{
/* Handle LanguageChange events: */
switch (pEvent->type())
{
case QEvent::LanguageChange: retranslateUi(); break;
default: break;
}
}
/* Call to base-class: */
return Base::eventFilter(pObject, pEvent);
}
/** Handles translation event. */
virtual void retranslateUi() = 0;
};
#endif /* !FEQT_INCLUDED_SRC_globals_QIWithRetranslateUI_h */
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