int ScalePicker::maxLabelWidth(const QwtScale *scale) const
{
QFontMetrics fm(scale->font());
const QwtScaleDraw * scaleDraw=scale->scaleDraw ();
const QwtScaleDiv scaleDiv=scaleDraw->scaleDiv();
const double step_eps = 1.0e-6;
int maxWidth = 0;
for (uint i = 0; i < scaleDiv.majCnt(); i++)
{
double val = scaleDiv.majMark(i);
// correct rounding errors if val = 0
if ((!scaleDiv.logScale())
&& (qwtAbs(val) < step_eps * qwtAbs(scaleDiv.majStep())))
{
val = 0.0;
}
const int w = fm.boundingRect(scaleDraw->label(val)).width();
if ( w > maxWidth )
maxWidth = w;
}
return maxWidth;
}
int ScalePicker::maxLabelHeight(const QwtScale *scale) const
{
QFontMetrics fm(scale->font());
const QwtScaleDraw * scaleDraw=scale->scaleDraw ();
const QwtScaleDiv scaleDiv=scaleDraw->scaleDiv();
int maxHeight = 0;
for (uint i = 0; i < scaleDiv.majCnt(); i++)
{
double val = scaleDiv.majMark(i);
const int w = fm.boundingRect(scaleDraw->label(val)).height();
if ( w > maxHeight )
maxHeight = w;
}
return maxHeight;
}
