/*!
Calculate the minimum length that is needed to draw the scale
\param pen Pen that is used for painting backbone and ticks
\param font Font used for painting the labels
\sa extent()
*/
int QwtScaleDraw::minLength(const QPen &pen, const QFont &font) const
{
int startDist, endDist;
getBorderDistHint(font, startDist, endDist);
const QwtScaleDiv &sd = scaleDiv();
const uint minorCount =
sd.ticks(QwtScaleDiv::MinorTick).count() +
sd.ticks(QwtScaleDiv::MediumTick).count();
const uint majorCount =
sd.ticks(QwtScaleDiv::MajorTick).count();
int lengthForLabels = 0;
if ( hasComponent(QwtAbstractScaleDraw::Labels) )
{
if ( majorCount >= 2 )
lengthForLabels = minLabelDist(font) * (majorCount - 1);
}
int lengthForTicks = 0;
if ( hasComponent(QwtAbstractScaleDraw::Ticks) )
{
const int pw = qwtMax( 1, pen.width() ); // penwidth can be zero
lengthForTicks = 2 * (majorCount + minorCount) * pw;
}
return startDist + endDist + qwtMax(lengthForLabels, lengthForTicks);
}
/*!
Calculate the minimum length that is needed to draw the scale
\param font Font used for painting the labels
\return Minimum length that is needed to draw the scale
\sa extent()
*/
int QwtScaleDraw::minLength( const QFont &font ) const
{
int startDist, endDist;
getBorderDistHint( font, startDist, endDist );
const QwtScaleDiv &sd = scaleDiv();
const uint minorCount =
sd.ticks( QwtScaleDiv::MinorTick ).count() +
sd.ticks( QwtScaleDiv::MediumTick ).count();
const uint majorCount =
sd.ticks( QwtScaleDiv::MajorTick ).count();
int lengthForLabels = 0;
if ( hasComponent( QwtAbstractScaleDraw::Labels ) )
lengthForLabels = minLabelDist( font ) * majorCount;
int lengthForTicks = 0;
if ( hasComponent( QwtAbstractScaleDraw::Ticks ) )
{
const double pw = qMax( 1, penWidth() ); // penwidth can be zero
lengthForTicks = qCeil( ( majorCount + minorCount ) * ( pw + 1.0 ) );
}
return startDist + endDist + qMax( lengthForLabels, lengthForTicks );
}
