Qwt User's Guide: QwtMathMLTextEngine Class Reference

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QwtMathMLTextEngine Class Reference

Text Engine for the MathML renderer of the Qt solutions package. More...

#include <qwt_mathml_text_engine.h>

Inheritance diagram for QwtMathMLTextEngine:
[legend]

List of all members.

Public Member Functions

 QwtMathMLTextEngine ()
virtual ~QwtMathMLTextEngine ()
virtual int heightForWidth (const QFont &font, int flags, const QString &text, int width) const
virtual QSize textSize (const QFont &font, int flags, const QString &text) const
virtual void draw (QPainter *painter, const QRect &rect, int flags, const QString &text) const
virtual bool mightRender (const QString &) const
virtual void textMargins (const QFont &, const QString &, int &left, int &right, int &top, int &bottom) const

Detailed Description

Text Engine for the MathML renderer of the Qt solutions package.

The Qt Solution package includes a renderer for MathML http://www.trolltech.com/products/qt/addon/solutions/catalog/4/Widgets/qtmmlwidget that is available for owners of a commercial Qt license. You need a version >= 2.1, that is only available for Qt4.

To enable MathML support the following code needs to be added to the application: 

#include <qwt_mathml_text_engine.h>

QwtText::setTextEngine(QwtText::MathMLText, new QwtMathMLTextEngine());
See also:
QwtTextEngine, QwtText::setTextEngine
Warning:
Unfortunately the MathML renderer doesn't support rotating of texts.

Constructor & Destructor Documentation

QwtMathMLTextEngine::QwtMathMLTextEngine (  ) 

Constructor.

QwtMathMLTextEngine::~QwtMathMLTextEngine (  )  [virtual]

Destructor.

Member Function Documentation

void QwtMathMLTextEngine::draw ( QPainter *  painter,
const QRect &  rect,
int  flags,
const QString &  text 
) const [virtual]

Draw the text in a clipping rectangle

Parameters:
painter Painter
rect Clipping rectangle
flags Bitwise OR of the flags like in for QPainter::drawText
text Text to be rendered

Implements QwtTextEngine.

int QwtMathMLTextEngine::heightForWidth ( const QFont &  font,
int  flags,
const QString &  text,
int  width 
) const [virtual]

Find the height for a given width

Parameters:
font Font of the text
flags Bitwise OR of the flags used like in QPainter::drawText
text Text to be rendered
width Width
Returns:
Calculated height

Implements QwtTextEngine.

bool QwtMathMLTextEngine::mightRender ( const QString &  text  )  const [virtual]

Test if a string can be rendered by QwtMathMLTextEngine

Parameters:
text Text to be tested
Returns:
true, if text begins with "<math>".

Implements QwtTextEngine.

void QwtMathMLTextEngine::textMargins ( const QFont &  ,
const QString &  ,
int &  left,
int &  right,
int &  top,
int &  bottom 
) const [virtual]

Return margins around the texts

Parameters:
left Return 0
right Return 0
top Return 0
bottom Return 0

Implements QwtTextEngine.

QSize QwtMathMLTextEngine::textSize ( const QFont &  font,
int  flags,
const QString &  text 
) const [virtual]

Returns the size, that is needed to render text

Parameters:
font Font of the text
flags Bitwise OR of the flags used like in QPainter::drawText
text Text to be rendered
Returns:
Caluclated size

Implements QwtTextEngine.

Generated on Wed Sep 2 18:37:24 2009 for Qwt User's Guide by  doxygen 1.6.1
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