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QwtTextEngine(3)               Qwt User's Guide               QwtTextEngine(3)

NAME
       QwtTextEngine -

SYNOPSIS
       #include <qwt_text_engine.h>

       Inherited by QwtMathMLTextEngine, QwtPlainTextEngine, and
       QwtRichTextEngine.

   Public Member Functions
       virtual ~QwtTextEngine ()
       virtual void draw (QPainter *painter, const QRect &rect, int flags,
           const QString &text) const =0
       virtual int heightForWidth (const QFont &font, int flags, const QString
           &text, int width) const =0
       virtual bool mightRender (const QString &text) const =0
       virtual void textMargins (const QFont &font, const QString &text, int
           &left, int &right, int &top, int &bottom) const =0
       virtual QSize textSize (const QFont &font, int flags, const QString
           &text) const =0

   Protected Member Functions
       QwtTextEngine ()

Detailed Description
       Abstract base class for rendering text strings.

       A text engine is responsible for rendering texts for a specific text
       format. They are used by QwtText to render a text.

       QwtPlainTextEngine and QwtRichTextEngine are part of the Qwt library.

       QwtMathMLTextEngine can be found in Qwt MathML extension, that needs
       the MathML renderer of the Qt solutions package. Unfortunately it is
       only available with a commercial Qt license.

       See also:
           QwtText::setTextEngine()

Member Function Documentation
   virtual void QwtTextEngine::draw (QPainter *painter, const QRect &rect,
       intflags, const QString &text) const [pure 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

       Implemented in QwtRichTextEngine, QwtPlainTextEngine, and
       QwtMathMLTextEngine.

   virtual int QwtTextEngine::heightForWidth (const QFont &font, intflags,
       const QString &text, intwidth) const [pure 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

       Implemented in QwtRichTextEngine, QwtPlainTextEngine, and
       QwtMathMLTextEngine.

   virtual bool QwtTextEngine::mightRender (const QString &text) const [pure
       virtual]
       Test if a string can be rendered by this text engine

       Parameters:
           text Text to be tested

       Returns:
           true, if it can be rendered

       Implemented in QwtRichTextEngine, QwtPlainTextEngine, and
       QwtMathMLTextEngine.

   virtual void QwtTextEngine::textMargins (const QFont &font, const QString
       &text, int &left, int &right, int &top, int &bottom) const [pure
       virtual]
       Return margins around the texts

       The textSize might include margins around the text, like
       QFontMetrics::descent. In situations where texts need to be aligend in
       detail, knowing these margins might improve the layout calculations.

       Parameters:
           font Font of the text
           text Text to be rendered
           left Return value for the left margin
           right Return value for the right margin
           top Return value for the top margin
           bottom Return value for the bottom margin

       Implemented in QwtRichTextEngine, QwtPlainTextEngine, and
       QwtMathMLTextEngine.

   virtual QSize QwtTextEngine::textSize (const QFont &font, intflags, const
       QString &text) const [pure virtual]
       Returns the size, that is needed to render text

       Parameters:
           font Font of the text
           flags Bitwise OR of the flags like in for QPainter::drawText
           text Text to be rendered

       Returns:
           Caluclated size

       Implemented in QwtRichTextEngine, QwtPlainTextEngine, and
       QwtMathMLTextEngine.

Author
       Generated automatically by Doxygen for Qwt User's Guide from the source
       code.

Version 5.2.3                   Tue Nov 20 2012               QwtTextEngine(3)