Skip to main content :: ::

KOffice API Docs

:: Skip to Link Menu
/ KOffice / API Docs / kformula / flake

kformula/flake FractionElement.cpp Go to the documentation of this file. /* This file is part of the KDE project Copyright (C) 2001 Andrea Rizzi <rizzi@kde.org> Ulrich Kuettler <ulrich.kuettler@mailbox.tu-dresden.de> 2006 Martin Pfeiffer <hubipete@gmx.net> 2009 Jeremias Epperlein <jeeree@web.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. */ #include "FractionElement.h" #include "FormulaCursor.h" #include "AttributeManager.h" #include <KoXmlWriter.h> #include <KoXmlReader.h> #include <QPainter> #include <kdebug.h> FractionElement::FractionElement( BasicElement* parent ) : FixedElement( parent ) { m_numerator = new RowElement( this ); m_denominator = new RowElement( this ); m_lineThickness = 1.0; } FractionElement::~FractionElement() { delete m_numerator; delete m_denominator; } void FractionElement::paint( QPainter& painter, AttributeManager* am ) { Q_UNUSED( am ) // return if there is nothing to paint if( m_lineThickness == 0.0 ) return; // paint the fraction line with the specified line width QPen pen; pen.setWidthF( m_lineThickness ); painter.setPen( pen ); painter.drawLine( m_fractionLine ); } void FractionElement::layout( const AttributeManager* am ) { // get values of all attributes QString value = am->findValue( "linethickness", this ); Length length; if(value == "thick") length.value = 2; else if(value == "medium") length.value = 1; else if(value == "thin") length.value = 0.5; else length = am->parseUnit( value, this ); if(length.unit == Length::None) m_lineThickness = am->lineThickness(this) * length.value; else m_lineThickness = am->lengthToPixels(length, this, "linethickness"); // decide which layout is wanted if( am->boolOf( "bevelled", this ) ) { layoutBevelledFraction( am ); return; } double distY = am->layoutSpacing( this ); Align numalign = am->alignOf( "numalign", this ); Align denomalign = am->alignOf( "denomalign", this ); // align the numerator and the denominator QPointF numeratorOrigin; QPointF denominatorOrigin( 0.0, m_numerator->height() + m_lineThickness + 2*distY ); setWidth( qMax( m_numerator->width(), m_denominator->width() ) + m_lineThickness*2 ); if( numalign == Right ) numeratorOrigin.setX( width() - m_numerator->width() - m_lineThickness ); else if( numalign == Center ) numeratorOrigin.setX( ( width() - m_numerator->width() ) / 2 ); if( denomalign == Right ) denominatorOrigin.setX( width() - m_denominator->width() - m_lineThickness ); else if( numalign == Center ) denominatorOrigin.setX( ( width() - m_denominator->width() ) / 2 ); m_numerator->setOrigin( numeratorOrigin ); m_denominator->setOrigin( denominatorOrigin ); // construct the fraction's line double fractionLineY = m_numerator->height() + m_lineThickness/2 + distY; m_fractionLine = QLineF( QPointF( m_lineThickness, fractionLineY ), QPointF( width()-m_lineThickness, fractionLineY ) ); setHeight( m_numerator->height() + m_denominator->height() + m_lineThickness + 2*distY ); setBaseLine( denominatorOrigin.y() ); } void FractionElement::layoutBevelledFraction( const AttributeManager* am ) { // the shown line should have a width that has 1/3 of the height // the line is heigher as the content by 2*thinmathspace = 2*borderY double borderY = am->layoutSpacing( this ); setHeight( m_numerator->height() + m_denominator->height() + 2*borderY ); setWidth( m_numerator->width() + m_denominator->width() + height()/3 ); setBaseLine( height()/2 ); m_numerator->setOrigin( QPointF( 0.0, borderY ) ); m_denominator->setOrigin( QPointF( width()-m_denominator->width(), borderY+m_numerator->height() ) ); m_fractionLine = QLineF( QPointF( m_numerator->width(), height() ), QPointF( width()-m_denominator->width(), 0.0 ) ); } const QList<BasicElement*> FractionElement::childElements() const { QList<BasicElement*> list; list << m_numerator<<m_denominator; return list; } int FractionElement::endPosition() const { return 3; } // QLineF FractionElement::cursorLine(int position) const { // QPointF top=absoluteBoundingRect().topLeft(); // QPointF bottom; // switch (position) { // case 0: // top+=m_numerator->origin(); // break; // case 1: // top+=m_numerator->origin()+QPointF(m_numerator->width(),0.0); // break; // case 2: // top+=m_denominator->origin(); // break; // case 3: // top+=m_denominator->origin()+QPointF(m_denominator->width(),0.0); // break; // } // if (position<=1) { // bottom=top+QPointF(0.0,m_numerator->height()); // } // else { // bottom=top+QPointF(0.0,m_denominator->height()); // } // return QLineF(top, bottom); // } QList< BasicElement* > FractionElement::elementsBetween ( int pos1, int pos2 ) const { QList<BasicElement*> tmp; if (pos1==0 && pos2 >0) { tmp.append(m_numerator); } if (pos1<3 && pos2==3) { tmp.append(m_denominator); } return tmp; } int FractionElement::positionOfChild(BasicElement* child) const { if (m_numerator==child){ return 0; } else if (m_denominator==child) { return 2; } return -1; } bool FractionElement::moveCursor(FormulaCursor& newcursor, FormulaCursor& oldcursor) { if (newcursor.isSelecting()) { return false; } else { //TODO: How can I get the attribute of the Attributemanager here? // The movement should be different in the bevelled case //if (bevelled) { // return moveHorSituation(newcursor,oldcursor,0,1 ) return moveVertSituation(newcursor,oldcursor,0,1); } } bool FractionElement::setCursorTo( FormulaCursor& cursor, QPointF point ) { //check if the point is above the fraction line, the origin is in the top left corner bool inNumerator=point.y() < (m_numerator->boundingRect().bottom() + m_denominator->boundingRect().top())/2 ; if (cursor.isSelecting()) { return false; } else { if (point.x() > width()) { cursor.moveTo(this,inNumerator? 1 : 3); return true; } if (point.x() < 0) { cursor.moveTo(this,inNumerator? 0 : 2); return true; } if ( inNumerator ) { point-=m_numerator->origin(); //TODO: maybe place it directly in the fraction if this fails return m_numerator->setCursorTo(cursor,point); } else { point-=m_denominator->origin(); return m_denominator->setCursorTo(cursor,point); } } } bool FractionElement::replaceChild ( BasicElement* oldelement, BasicElement* newelement ) { //TODO: investigate, if we really need this if (newelement->elementType()==Row) { RowElement* newrow=static_cast<RowElement*>(newelement); if( oldelement == m_numerator ) { m_numerator = newrow; return true; } else if( oldelement == m_denominator ) { m_denominator = newrow; return true; } } return false; } QString FractionElement::attributesDefaultValue( const QString& attribute ) const { if( attribute == "linethickness" ) return "1"; else if( attribute == "numalign" || attribute == "denomalign" ) return "center"; else if( attribute == "bevelled" ) return "false"; else return QString(); } bool FractionElement::readMathMLContent( const KoXmlElement& parent ) { KoXmlElement tmp; int counter=0; forEachElement( tmp, parent ) { if (counter==0) { loadElement(tmp,&m_numerator); } else if (counter==1) { loadElement(tmp,&m_denominator); } else { kDebug(39001) << "Too many arguments to mfrac"; } counter++; } if (counter<2) { kDebug(39001) << "Not enough arguments to mfrac"; } return true; } void FractionElement::writeMathMLContent( KoXmlWriter* writer ) const { m_numerator->writeMathML( writer ); m_denominator->writeMathML( writer ); } ElementType FractionElement::elementType() const { return Fraction; } kformula/flake Skip menu "kformula/flake" Main Page Class Hierarchy Alphabetical List Class List File List Class Members API Reference Skip menu "API Reference" kdgantt Kexi   KoProperty   flake kplato krita   image   plugins       libbrush       libpaintop   ui kspread   part     scripting libs   flake   kotext   main   pigment   store   musicshape Generated for API Reference by doxygen 1.5.9-20090814 This website is maintained by Adriaan de Groot and Allen Winter. KDE® and the K Desktop Environment® logo are registered trademarks of KDE e.V. | Legal