ReplyBase.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
 
class SWidget;
 
class FReplyBase
{
public:
 
    bool IsEventHandled() const { return bIsHandled; }
    
    const TSharedPtr<SWidget> GetHandler() const { return EventHandler; }
        
protected:
 
    FReplyBase( bool InIsHandled )
    : bIsHandled(InIsHandled)
    {
    }
 
    bool bIsHandled;
    
    TSharedPtr<SWidget> EventHandler;
};
 
template<typename ReplyType>
class TReplyBase : public FReplyBase
{
public:
    TReplyBase( bool bIsHandled )
    : FReplyBase( bIsHandled )
    {
    }
 
protected:
    friend class FEventRouter;
 
    ReplyType& SetHandler( const TSharedRef<SWidget>& InHandler )
    {
        this->EventHandler = InHandler;
        return Me();
    }
 
    ReplyType& Me()
    {
        return static_cast<ReplyType&>(*this);
    }
};
 
class FNoReply : public TReplyBase<FNoReply>
{
public:
    static FNoReply Unhandled(){ return FNoReply(); }
    FNoReply() : TReplyBase<FNoReply>(false){}
};