CFocusDecorator.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/QtGlobal>
#include <QtCore/QMap>
#include <QtCore/QEvent>
#if QT_VERSION >= 0x050000
#include <QtWidgets/QGraphicsEffect>
#include <QtWidgets/QWidget>
#else
#include <QtGui/QGraphicsEffect>
#include <QtGui/QWidget>
#endif
 
// ACF includes
#include <istd/IPolymorphic.h>
 
 
namespace iwidgets
{
 
 
/*
       Helper class for creating widget decorations based on graphics effects, such drop shadow.
*/
class CFocusDecorator: public QObject
{
       Q_OBJECT
public:
       class IGraphicsEffectFactory: virtual public istd::IPolymorphic
       {
       public:
              virtual std::unique_ptr<QGraphicsEffect> CreateEffect() const = 0;
       };
 
       explicit CFocusDecorator(QObject* parentPtr = NULL);
       virtual ~CFocusDecorator();
 
       bool RegisterWidget(QWidget* widgetPtr, IGraphicsEffectFactory* effectFactoryPtr);
       void UnregisterWidget(QWidget* widgetPtr);
       void UnregisterAllWidgets();
 
protected:
       // reimplemented (QObject)
       virtual bool eventFilter(QObject* objectPtr, QEvent* eventPtr) override;
 
private Q_SLOTS:
       void OnObjectDestroyed(QObject* objectPtr);
 
private:
       typedef QMap<QObject*, IGraphicsEffectFactory*> WidgetEffectsMap;
       WidgetEffectsMap m_widgetEffectsMap;
};
 
 
} // namespace iwidgets