TStyledObjectWrap.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
 
 
// ACF includes
#include <iqtgui/iqtgui.h>
#include <iqtgui/CIconProvider.h>
#include <iqt/CDesignThemeEvent.h>
 
// Qt includes
#include <QtWidgets/QWidget>
#include <QtCore/QCoreApplication>
 
 
namespace iqtgui
{
 
template <class Base>
class TStyledObjectWrap: public Base, public CIconProvider
{
       static_assert(std::is_base_of_v<QObject, Base>, "TStyledObjectWrap must wrap a QObject derived class");
 
       typedef Base BaseClass;
 
protected:
 
       template<typename... Args>
       TStyledObjectWrap(Args&&... args)
              : Base(std::forward<Args>(args)...)
       {
              EnableDesignHandler(true);
       }
 
       virtual void OnDesignChanged() = 0;
       
       void EnableDesignHandler(bool enable)
       {
              auto* app = QCoreApplication::instance();
              if (app != nullptr){
                     if (enable){
                            app->installEventFilter(this);
                     }
                     else{
                            app->removeEventFilter(this);
                     }
              }
       }
 
       // reimplemented (QObject)
       virtual bool eventFilter(QObject* sourcePtr, QEvent* eventPtr) override
       {
              if (sourcePtr == QCoreApplication::instance()){
                     if (eventPtr->type() == iqt::CDesignThemeEvent::s_eventType){
                            Q_ASSERT(dynamic_cast<const iqt::CDesignThemeEvent*>(eventPtr) != nullptr);
                            auto* designEventPtr = static_cast<const iqt::CDesignThemeEvent*>(eventPtr);
                            
                            SetThemeId(designEventPtr->GetThemeId());
                            OnDesignChanged();
                     }
              }
 
              return BaseClass::eventFilter(sourcePtr, eventPtr);
       }
 
};
 
 
using StyledWidget = TStyledObjectWrap<QWidget>;
 
 
} // namespace iqtgui