formulaelement.h

/* This file is part of the KDE project
   Copyright (C) 2001 Andrea Rizzi <rizzi@kde.org>
                  Ulrich Kuettler <ulrich.kuettler@mailbox.tu-dresden.de>
 
   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.
 
   This library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.
 
   You should have received a copy of the GNU Library General Public License
   along with this library; see the file COPYING.LIB.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
*/
 
#ifndef FORMULAELEMENT_H
#define FORMULAELEMENT_H
 
// Formula include
#include "sequenceelement.h"
 
KFORMULA_NAMESPACE_BEGIN
 
class BasicElement;
class ContextStyle;
class FormulaDocument;
class SymbolTable;
 

class FormulaElement : public SequenceElement {
    typedef SequenceElement inherited;
public:

    FormulaElement(FormulaDocument* container);
 
    virtual FormulaElement* clone() { return 0; }

    BasicElement* goToPos( FormulaCursor*, const LuPixelPoint& point );

    virtual bool readOnly( const BasicElement* /*child*/ ) const { return false; }

    virtual bool readOnly( const FormulaCursor* ) const { return false; }

    virtual FormulaElement* formula() { return this; }

    virtual const FormulaElement* formula() const { return this; }

    void elementRemoval(BasicElement* child);

    virtual void changed();

    void cursorHasMoved( FormulaCursor* );
 
    void moveOutLeft( FormulaCursor* );
    void moveOutRight( FormulaCursor* );
    void moveOutBelow( FormulaCursor* );
    void moveOutAbove( FormulaCursor* );

    void tell( const TQString& msg );

    void removeFormula( FormulaCursor* );
 
    void insertFormula( FormulaCursor* );

    virtual void calcSizes( const ContextStyle& context,
                            ContextStyle::TextStyle tstyle,
                            ContextStyle::IndexStyle istyle,
                            StyleAttributes& style );

    virtual void draw( TQPainter& painter, const LuPixelRect& r,
                       const ContextStyle& context,
                       ContextStyle::TextStyle tstyle,
                       ContextStyle::IndexStyle istyle,
                       StyleAttributes& style,
                       const LuPixelPoint& parentOrigin );

    void calcSizes( ContextStyle& context );

    void draw( TQPainter& painter, const LuPixelRect& r, ContextStyle& context );

    virtual KCommand* buildCommand( Container*, Request* );

    const SymbolTable& getSymbolTable() const;

    virtual TQString toLatex();
 
    int getBaseSize() const { return baseSize; }
    void setBaseSize( int size );
 
    bool hasOwnBaseSize() const { return ownBaseSize; }
 
    virtual KCommand* input( Container* container, TQKeyEvent* event );
 
    virtual void writeMathML( TQDomDocument& doc, TQDomNode& parent, bool oasisFormat = false ) const ;

    virtual void writeDom(TQDomElement element);

    TQDomElement emptyFormulaElement( TQDomDocument& doc );
 
protected:
 
    //Save/load support

    virtual TQString getTagName() const { return "FORMULA"; }

    virtual bool readAttributesFromDom(TQDomElement element);

    virtual bool readContentFromDom(TQDomNode& node);
 
 
private:

    void convertNames( TQDomNode node );

    FormulaDocument* document;

    int baseSize;

    bool ownBaseSize;
};
 
KFORMULA_NAMESPACE_END
 
#endif // FORMULAELEMENT_H