void StaffTypeTablature::setFretMetrics()
{
if(_fretMetricsValid && _refDPI == MScore::DPI)
return;
QFontMetricsF fm(fretFont());
// compute total height of used characters
QRectF bb(fm.tightBoundingRect(_useNumbers ? g_strNumbers : g_strLetters));
// compute vertical displacement
if(_useNumbers) {
// for numbers: centre on '0': move down by the whole part above (negative)
// the base line ( -bb.y() ) then up by half the whole height ( -bb.height()/2 )
QRectF bx( fm.tightBoundingRect("0") );
_fretYOffset = -(bx.y() + bx.height()/2.0);
// _fretYOffset = -(bb.y() + bb.height()/2.0); // <- using bbox of all chars
}
else {
// for letters: centre on the 'a' ascender, by moving down half of the part above the base line in bx
QRectF bx( fm.tightBoundingRect("a") );
_fretYOffset = -bx.y() / 2.0;
}
// if on string, we are done; if between strings, raise by half line distance
if(!_onLines)
_fretYOffset -= lineDistance().val()*MScore::DPI*SPATIUM20 / 2.0;
// from _fretYOffset, compute _charBoxH and _charBoxY
_fretBoxH = bb.height();
_fretBoxY = bb.y() + _fretYOffset;
// keep track of the conditions under which metrics have been computed
_refDPI = MScore::DPI;
_fretMetricsValid = true;
}
void StaffTypeTablature::setFretMetrics()
{
if(_fretMetricsValid && _refDPI == MScore::DPI)
return;
QFontMetricsF fm(fretFont());
QRectF bb;
// compute vertical displacement
if(_useNumbers) {
// compute total height of used characters
QString txt = QString();
for (int idx = 0; idx < 10; idx++) // use only first 10 digits
txt.append(_fretFonts[_fretFontIdx].displayDigit[idx]);
bb = fm.tightBoundingRect(txt);
// for numbers: centre on '0': move down by the whole part above (negative)
// the base line ( -bb.y() ) then up by half the whole height ( -bb.height()/2 )
QRectF bx( fm.tightBoundingRect(_fretFonts[_fretFontIdx].displayDigit[0]) );
_fretYOffset = -(bx.y() + bx.height()/2.0);
// _fretYOffset = -(bb.y() + bb.height()/2.0); // <- using bbox of all chars
}
else {
// compute total height of used characters
QString txt(_fretFonts[_fretFontIdx].displayLetter, NUM_OF_LETTERFRETS);
bb = fm.tightBoundingRect(txt);
// for letters: centre on the 'a' ascender, by moving down half of the part above the base line in bx
QRectF bx( fm.tightBoundingRect(_fretFonts[_fretFontIdx].displayLetter[0]) );
_fretYOffset = -bx.y() / 2.0;
}
// if on string, we are done; if between strings, raise by half line distance
if(!_onLines)
_fretYOffset -= lineDistance().val()*MScore::DPI*SPATIUM20 / 2.0;
// from _fretYOffset, compute _charBoxH and _charBoxY
_fretBoxH = bb.height();
_fretBoxY = bb.y() + _fretYOffset;
// keep track of the conditions under which metrics have been computed
_refDPI = MScore::DPI;
_fretMetricsValid = true;
}
