// $Revision: 1.3 $
// Copyright (C) 1994-1995 Taligent, Inc. All rights reserved.

#ifndef TaligentSamples_SENDER
#include "Sender.h"
#endif

TSender::TSender()
    : MSenderProtocol(), 
    MDelegatingNotifier(), 
    fValue(0), 
    fNotifier(NIL),
    fOwnsNotifier(false)
{
}

TSender::TSender(const TSender& source)
    : MSenderProtocol(), 
    MDelegatingNotifier(), 
    fValue(source.fValue), 
    fNotifier(NIL),
    fOwnsNotifier(false)
{
}

TSender::~TSender()
{
    if (fOwnsNotifier) {
        delete fNotifier;
    }
}

TSender&
TSender::operator=(const TSender& source)
{
    if (&source != this) {
        if (fOwnsNotifier) {
            delete fNotifier;
            fNotifier = NIL;
            fOwnsNotifier = false;
        }
        
        if (source.fOwnsNotifier) {
            fNotifier = NIL;    // Can't copy MNotifier.
        } else {
            fNotifier = source.fNotifier;
        }
    }
    
    return *this;
}

long
TSender::GetValue() const
{
    return fValue;
}

void
TSender::SetValue(long value)
{
    if (value != fValue) {
        fValue = value;
        Notify(TNotification(GetValueChangedInterest()));
    }
}

TInterest 
TSender::GetValueChangedInterest() const
{
    static const TToken kValueChanged("ValueChanged");
    // Cast away const.
    return TInterest(GetNotifier(), kValueChanged);
}

MNotifier*
TSender::GetNotifier() const
{
    if (!fNotifier) {
        // Cast away const.
        ((TSender*)this)->fNotifier = new TNotifier;
        ((TSender*)this)->fOwnsNotifier = true;
    }
    return fNotifier;
}

void
TSender::SetNotifier(MNotifier* notifier)
{
    if (fOwnsNotifier) {
        delete fNotifier;
        fOwnsNotifier = false;
    }
    fNotifier = notifier;
}