You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
256 lines
7.8 KiB
256 lines
7.8 KiB
/* 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 FRACTIONELEMENT_H
|
|
#define FRACTIONELEMENT_H
|
|
|
|
#include "basicelement.h"
|
|
|
|
KFORMULA_NAMESPACE_BEGIN
|
|
class SequenceElement;
|
|
|
|
|
|
/**
|
|
* A fraction.
|
|
*/
|
|
class FractionElement : public BasicElement {
|
|
FractionElement& operator=( const FractionElement& ) { return *this; }
|
|
public:
|
|
|
|
enum { numeratorPos, denominatorPos };
|
|
|
|
FractionElement(BasicElement* parent = 0);
|
|
~FractionElement();
|
|
|
|
FractionElement( const FractionElement& );
|
|
|
|
virtual FractionElement* clone() {
|
|
return new FractionElement( *this );
|
|
}
|
|
|
|
virtual bool accept( ElementVisitor* visitor );
|
|
|
|
/**
|
|
* @returns the type of this element. Used for
|
|
* parsing a sequence.
|
|
*/
|
|
virtual TokenType getTokenType() const { return INNER; }
|
|
|
|
/**
|
|
* The cursor has entered one of our child sequences.
|
|
* This is a good point to tell the user where he is.
|
|
*/
|
|
virtual void entered( SequenceElement* child );
|
|
|
|
/**
|
|
* Sets the cursor and returns the element the point is in.
|
|
* The handled flag shows whether the cursor has been set.
|
|
* This is needed because only the innermost matching element
|
|
* is allowed to set the cursor.
|
|
*/
|
|
virtual BasicElement* goToPos( FormulaCursor*, bool& handled,
|
|
const LuPixelPoint& point, const LuPixelPoint& parentOrigin );
|
|
|
|
/**
|
|
* Calculates our width and height and
|
|
* our tqchildren's parentPosition.
|
|
*/
|
|
virtual void calcSizes( const ContextStyle& cstyle,
|
|
ContextStyle::TextStyle tstyle,
|
|
ContextStyle::IndexStyle istyle,
|
|
StyleAttributes& style );
|
|
|
|
/**
|
|
* Draws the whole element including its tqchildren.
|
|
* The `parentOrigin' is the point this element's parent starts.
|
|
* We can use our parentPosition to get our own origin then.
|
|
*/
|
|
virtual void draw( TQPainter& painter, const LuPixelRect& r,
|
|
const ContextStyle& cstyle,
|
|
ContextStyle::TextStyle tstyle,
|
|
ContextStyle::IndexStyle istyle,
|
|
StyleAttributes& style,
|
|
const LuPixelPoint& parentOrigin );
|
|
|
|
/**
|
|
* Dispatch this FontCommand to all our TextElement tqchildren.
|
|
*/
|
|
virtual void dispatchFontCommand( FontCommand* cmd );
|
|
|
|
/**
|
|
* Enters this element while moving to the left starting inside
|
|
* the element `from'. Searches for a cursor position inside
|
|
* this element or to the left of it.
|
|
*/
|
|
virtual void moveLeft(FormulaCursor* cursor, BasicElement* from);
|
|
|
|
/**
|
|
* Enters this element while moving to the right starting inside
|
|
* the element `from'. Searches for a cursor position inside
|
|
* this element or to the right of it.
|
|
*/
|
|
virtual void moveRight(FormulaCursor* cursor, BasicElement* from);
|
|
|
|
/**
|
|
* Enters this element while moving up starting inside
|
|
* the element `from'. Searches for a cursor position inside
|
|
* this element or above it.
|
|
*/
|
|
virtual void moveUp(FormulaCursor* cursor, BasicElement* from);
|
|
|
|
/**
|
|
* Enters this element while moving down starting inside
|
|
* the element `from'. Searches for a cursor position inside
|
|
* this element or below it.
|
|
*/
|
|
virtual void moveDown(FormulaCursor* cursor, BasicElement* from);
|
|
|
|
/**
|
|
* Reinserts the denominator if it has been removed.
|
|
*/
|
|
virtual void insert(FormulaCursor*, TQPtrList<BasicElement>&, Direction);
|
|
|
|
/**
|
|
* Removes all selected tqchildren and returns them. Places the
|
|
* cursor to where the tqchildren have been.
|
|
*
|
|
* We remove ourselve if we are requested to remove our numerator.
|
|
*
|
|
* It is possible to remove the denominator. But after this we
|
|
* are senseless and the caller is required to replace us.
|
|
*/
|
|
virtual void remove(FormulaCursor*, TQPtrList<BasicElement>&, Direction);
|
|
|
|
|
|
// main child
|
|
//
|
|
// If an element has tqchildren one has to become the main one.
|
|
|
|
virtual SequenceElement* getMainChild();
|
|
|
|
SequenceElement* getNumerator() { return numerator; }
|
|
SequenceElement* getDenominator() { return denominator; }
|
|
|
|
/**
|
|
* Returns wether the element has no more useful
|
|
* tqchildren (except its main child) and should therefore
|
|
* be replaced by its main child's content.
|
|
*/
|
|
virtual bool isSenseless();
|
|
|
|
/**
|
|
* Sets the cursor to select the child. The mark is placed before,
|
|
* the position behind it.
|
|
*/
|
|
virtual void selectChild(FormulaCursor* cursor, BasicElement* child);
|
|
|
|
/**
|
|
* Moves the cursor away from the given child. The cursor is
|
|
* guaranteed to be inside this element.
|
|
*/
|
|
//virtual void childWillVanish(FormulaCursor* cursor, BasicElement* child) = 0;
|
|
|
|
/**
|
|
* Tells whether the fraction should be drawn with a line.
|
|
*/
|
|
void showLine(bool line) {
|
|
m_lineThicknessType = RelativeSize;
|
|
if ( line ) {
|
|
m_lineThickness = 1.0;
|
|
}
|
|
else {
|
|
m_lineThickness = 0.0;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @returns the latex representation of the element and
|
|
* of the element's tqchildren
|
|
*/
|
|
virtual TQString toLatex();
|
|
|
|
virtual TQString formulaString();
|
|
|
|
protected:
|
|
|
|
//Save/load support
|
|
|
|
/**
|
|
* Returns the tag name of this element type.
|
|
*/
|
|
virtual TQString getTagName() const { return "FRACTION"; }
|
|
|
|
/**
|
|
* Appends our attributes to the dom element.
|
|
*/
|
|
virtual void writeDom(TQDomElement element);
|
|
|
|
/**
|
|
* Reads our attributes from the element.
|
|
* Returns false if it failed.
|
|
*/
|
|
virtual bool readAttributesFromDom(TQDomElement element);
|
|
|
|
/**
|
|
* Reads our content from the node. Sets the node to the next node
|
|
* that needs to be read.
|
|
* Returns false if it failed.
|
|
*/
|
|
virtual bool readContentFromDom(TQDomNode& node);
|
|
|
|
/**
|
|
* Reads our attributes from the MathML element.
|
|
* Returns false if it failed.
|
|
*/
|
|
virtual bool readAttributesFromMathMLDom(const TQDomElement& element);
|
|
|
|
/**
|
|
* Reads our content from the MathML node. Sets the node to the next node
|
|
* that needs to be read.
|
|
* Returns false if it failed.
|
|
*/
|
|
virtual int readContentFromMathMLDom(TQDomNode& node);
|
|
|
|
private:
|
|
virtual TQString getElementName() const { return "mfrac"; }
|
|
virtual void writeMathMLAttributes( TQDomElement& element ) const ;
|
|
virtual void writeMathMLContent( TQDomDocument& doc,
|
|
TQDomElement& element,
|
|
bool oasisFormat ) const ;
|
|
|
|
double lineThickness( const ContextStyle& context, double factor );
|
|
|
|
bool withLine() { return m_lineThicknessType == NoSize || m_lineThickness != 0.0; }
|
|
|
|
SequenceElement* numerator;
|
|
SequenceElement* denominator;
|
|
|
|
SizeType m_lineThicknessType;
|
|
double m_lineThickness;
|
|
HorizontalAlign m_numAlign;
|
|
HorizontalAlign m_denomAlign;
|
|
bool m_customBevelled;
|
|
bool m_bevelled;
|
|
};
|
|
|
|
KFORMULA_NAMESPACE_END
|
|
|
|
#endif // FRACTIONELEMENT_H
|