/*!
Draw the text in a clipping rectangle
\param painter Painter
\param rect Clipping rectangle
\param flags Bitwise OR of the flags like in for QPainter::drawText
\param text Text to be rendered
*/
void QwtMathMLTextEngine::draw(QPainter *painter, const QRectF &rect,
int flags, const QString& text) const
{
QwtMathMLDocument doc;
doc.setContent(text);
doc.setBaseFontPointSize(painter->font().pointSize());
const QSizeF docSize = doc.size();
QPointF pos = rect.topLeft();
if ( rect.width() > docSize.width() )
{
if ( flags & Qt::AlignRight )
pos.setX(rect.right() - docSize.width());
if ( flags & Qt::AlignHCenter )
pos.setX(rect.center().x() - docSize.width() / 2);
}
if ( rect.height() > docSize.height() )
{
if ( flags & Qt::AlignBottom )
pos.setY(rect.bottom() - docSize.height());
if ( flags & Qt::AlignVCenter )
pos.setY(rect.center().y() - docSize.height() / 2);
}
doc.paint(painter, pos.toPoint());
}
/*!
Returns the size, that is needed to render text
\param font Font of the text
\param flags Bitwise OR of the flags used like in QPainter::drawText
\param text Text to be rendered
\return Caluclated size
*/
QSizeF QwtMathMLTextEngine::textSize(const QFont &font,
int, const QString& text) const
{
static QString t;
static QSize sz;
if ( text != t )
{
QwtMathMLDocument doc;
doc.setContent(text);
doc.setBaseFontPointSize(font.pointSize());
sz = doc.size();
t = text;
}
return sz;
}
void FormulaView::renderFormula( QPainter *painter ) const
{
QwtMathMLDocument doc;
doc.setContent( d_formula );
doc.setBaseFontPointSize( d_fontSize );
QRectF docRect;
docRect.setSize( doc.size() );
docRect.moveCenter( rect().center() );
if ( d_transformation )
{
const double scaleF = d_scale ? 2.0 : 1.0;
painter->save();
painter->translate( docRect.center() );
painter->rotate( d_rotation );
painter->scale( scaleF, scaleF );
painter->translate( docRect.topLeft() - docRect.center() );
doc.paint( painter, QPointF( 0, 0 ) );
painter->restore();
}
else
{
doc.paint( painter, docRect.topLeft().toPoint() );
}
}