QPointF StaffType::chordStemPos(const Chord* chord) const
{
qreal y;
if (stemThrough())
// if stems are through staff, stem goes from fartest note string
y = (chord->up() ? chord->downString() : chord->upString()) * _lineDistance.val();
else
// if stems are beside staff, stem start point has a fixed vertical position,
// according to TAB parameters and stem up/down
y = chordRestStemPosY(chord);
return QPointF(chordStemPosX(chord), y);
}
qreal StaffType::chordStemLength(const Chord* chord) const
{
qreal stemLen;
// if stems are through staff, length should be computed by relevant chord algorithm;
// here, just return default length (= 1 'octave' = 3.5 line spaces)
if (stemThrough())
return STAFFTYPE_TAB_DEFAULTSTEMLEN_THRU * _lineDistance.val();
// if stems beside staff, length is fixed, but take into account shorter half note stems
else {
bool shrt = (minimStyle() == TablatureMinimStyle::SHORTER) && (chord->durationType().type() == TDuration::DurationType::V_HALF);
stemLen = (stemsDown() ? STAFFTYPE_TAB_DEFAULTSTEMLEN_DN : STAFFTYPE_TAB_DEFAULTSTEMLEN_UP)
* (shrt ? STAFFTYPE_TAB_SHORTSTEMRATIO : 1.0) * chord->mag();
}
return stemLen;
}
qreal StaffTypeTablature::chordStemLength(const Chord *chord) const
{
qreal stemLen;
// if stems are through staff, length is from fartest note to a fixed point aboe/below staff
if (stemThrough())
stemLen = stemsDown() ?
STAFFTYPE_TAB_DEFAULTSTEMLEN_DN + STAFFTYPE_TAB_DEFAULTSTEMDIST_DN
+ (_lines-1 - chord->upString()) * _lineDistance.val() :
STAFFTYPE_TAB_DEFAULTSTEMLEN_UP + STAFFTYPE_TAB_DEFAULTSTEMDIST_UP
+ chord->downString() * _lineDistance.val();
// if stems beside staff, length is fixed, but take into account shorter half note stems
else {
bool shrt = (minimStyle() == TAB_MINIM_SHORTER) && (chord->durationType().type() == TDuration::V_HALF);
stemLen = (stemsDown() ? STAFFTYPE_TAB_DEFAULTSTEMLEN_DN : STAFFTYPE_TAB_DEFAULTSTEMLEN_UP)
* (shrt ? 0.5 : 1.0);
}
return stemLen;
}
qreal StaffType::chordRestStemPosY(const ChordRest *chordRest) const
{
if (stemThrough()) // does not make sense for "stems through staves" setting; just return top line vert. position
return 0.0;
// if stems beside staff, position are fixed, but take into account delta for half notes
qreal delta = // displacement for half note stems (if used)
// if half notes have not a short stem OR not a half note => 0
(minimStyle() != TablatureMinimStyle::SHORTER || chordRest->durationType().type() != TDuration::DurationType::V_HALF) ?
0.0 :
// if stem is up, displace of half stem length down (positive)
// if stem is down, displace of half stem length up (negative)
(chordRest->up() ?
-STAFFTYPE_TAB_DEFAULTSTEMLEN_UP : STAFFTYPE_TAB_DEFAULTSTEMLEN_DN) * 0.5;
// if fret marks above lines and chordRest is up, move half a line distance up
if (!onLines() && chordRest->up())
delta -= _lineDistance.val() *0.5;
qreal y = (chordRest->up() ? STAFFTYPE_TAB_DEFAULTSTEMPOSY_UP : (_lines-1)*_lineDistance.val() + STAFFTYPE_TAB_DEFAULTSTEMPOSY_DN)
+ delta;
return y;
}
QPointF StaffTypeTablature::chordStemPos(const Chord *chord) const
{
qreal y;
qreal delta = // displacement for half note stems (if used)
// if half notes have not a short stem OR not a half note => 0
(minimStyle() != TAB_MINIM_SHORTER || chord->durationType().type() != TDuration::V_HALF) ?
0.0 :
// if stems are up, displace of half stem length down (positive)
// if stems are down, displace of half stem length up (negative)
(stemsDown() ?
STAFFTYPE_TAB_DEFAULTSTEMLEN_DN : -STAFFTYPE_TAB_DEFAULTSTEMLEN_UP) * 0.5;
// if stems are through staff, stem goes from fartest note string
if (stemThrough())
y = (stemsDown() ? chord->upString() : chord->downString()) * _lineDistance.val();
else
// if stems beside staff, position are fixed, but take into account delta
y = (stemsDown() ? (_lines-1)*_lineDistance.val() + STAFFTYPE_TAB_DEFAULTSTEMPOSY_DN :
STAFFTYPE_TAB_DEFAULTSTEMPOSY_UP) + delta;
return QPointF(STAFFTYPE_TAB_DEFAULTSTEMPOSX, y);
}