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71 lines
2.3 KiB
71 lines
2.3 KiB
15 years ago
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/* This file is part of the KDE project
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Copyright (C) 2003 Ulrich Kuettler <ulrich.kuettler@gmx.de>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef ELEMENTVISITOR_H
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#define ELEMENTVISITOR_H
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#include "kformuladefs.h"
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KFORMULA_NAMESPACE_BEGIN
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class BasicElement;
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class BracketElement;
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class EmptyElement;
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class FractionElement;
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class IndexElement;
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class MatrixElement;
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class MultilineElement;
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class NameSequence;
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class OverlineElement;
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class RootElement;
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class SequenceElement;
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class SpaceElement;
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class SymbolElement;
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class TextElement;
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class UnderlineElement;
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/**
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* Visitor. Provides a way to add new functionality to the element tree.
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*/
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class ElementVisitor {
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public:
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virtual ~ElementVisitor() {}
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virtual bool visit( BracketElement* ) { return true; }
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virtual bool visit( EmptyElement* ) { return true; }
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virtual bool visit( FractionElement* ) { return true; }
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virtual bool visit( IndexElement* ) { return true; }
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virtual bool visit( MatrixElement* ) { return true; }
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virtual bool visit( MultilineElement* ) { return true; }
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virtual bool visit( NameSequence* ) { return true; }
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virtual bool visit( OverlineElement* ) { return true; }
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virtual bool visit( RootElement* ) { return true; }
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virtual bool visit( SequenceElement* ) { return true; }
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virtual bool visit( SpaceElement* ) { return true; }
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virtual bool visit( SymbolElement* ) { return true; }
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virtual bool visit( TextElement* ) { return true; }
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virtual bool visit( UnderlineElement* ) { return true; }
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};
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KFORMULA_NAMESPACE_END
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#endif // ELEMENTVISITOR_H
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