// $Revision: 1.6 $
// Copyright (C) 1994, 1995 Taligent, Inc. All rights reserved.

#ifndef TaligentSamples_GRAPHDRAWER
#include "GraphDrawer.h"
#endif

#ifndef TaligentSamples_STANDARDGRAPH
#include "StandardGraph.h"
#endif

#ifndef Taligent_ASSERTIONS
#include <Taligent/Assertions.h>
#endif

//==============================================================================
// TGraphDrawer

TaligentTypeExtensionMacro_Abstract(TGraphDrawer);

TGraphDrawer::TGraphDrawer()
	: fTargetGraph(NIL)
{
}

TGraphDrawer::TGraphDrawer(const TGraphDrawer& source)
	: fTargetGraph(source.fTargetGraph)
{
}

TGraphDrawer::~TGraphDrawer()
{
	// Nothing is being deleted because TGraphDrawer does not own
	// any pointers that need deleting.
}

TGraphDrawer&
TGraphDrawer::operator=(const TGraphDrawer& source)
{
    if (&source != this) {
        fTargetGraph = source.fTargetGraph;
    }
    return *this;
}

TStream&
TGraphDrawer::operator>>=(TStream& toStream) const
{
    ::WriteVersion(toStream, kOriginalVersion);
    ::Flatten(fTargetGraph, toStream);
    return toStream;
}

TStream&
TGraphDrawer::operator<<=(TStream& fromStream)
{
    ::ReadVersion(fromStream, kOriginalVersion, kOriginalVersion);
	TStandardGraph* theGraph;
	::Resurrect(theGraph, fromStream);
	fTargetGraph = theGraph;
    return fromStream;
}

const TStandardGraph&
TGraphDrawer::GetTargetGraph() const
{
	::Assertion(fTargetGraph != NIL, "Target graph can't be NIL here!");
    return *fTargetGraph;
}

void
TGraphDrawer::SetTargetGraph(const TStandardGraph* graph)
{
    fTargetGraph = graph;
}

void
TGraphDrawer::Prepare(const TStandardGraph& graph)
{
	// default does nothing
}