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slur.cpp
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slur.cpp
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//=============================================================================
// MuseScore
// Music Composition & Notation
//
// Copyright (C) 2002-2011 Werner Schweer
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2
// as published by the Free Software Foundation and appearing in
// the file LICENCE.GPL
//=============================================================================
#include "note.h"
#include "chord.h"
#include "xml.h"
#include "slur.h"
#include "tie.h"
#include "measure.h"
#include "utils.h"
#include "score.h"
#include "system.h"
#include "segment.h"
#include "staff.h"
#include "navigate.h"
#include "articulation.h"
#include "undo.h"
#include "stem.h"
#include "beam.h"
#include "mscore.h"
#include "page.h"
#include "part.h"
namespace Ms {
Element* SlurTie::editEndElement;
Element* SlurTie::editStartElement;
QList<SlurOffsets> SlurTie::editUps;
//---------------------------------------------------------
// SlurSegment
//---------------------------------------------------------
SlurSegment::SlurSegment(Score* score)
: SpannerSegment(score)
{
setFlag(ElementFlag::ON_STAFF, true);
autoAdjustOffset = QPointF();
}
SlurSegment::SlurSegment(const SlurSegment& b)
: SpannerSegment(b)
{
for (int i = 0; i < int(Grip::GRIPS); ++i) {
_ups[i] = b._ups[i];
_ups[i].p = QPointF();
}
path = b.path;
autoAdjustOffset = QPointF();
}
//---------------------------------------------------------
// move
//---------------------------------------------------------
void SlurSegment::move(const QPointF& s)
{
Element::move(s);
for (int k = 0; k < int(Grip::GRIPS); ++k)
_ups[k].p += s;
}
//---------------------------------------------------------
// draw
//---------------------------------------------------------
void SlurSegment::draw(QPainter* painter) const
{
// hide tie toward the second chord of a cross-measure value
if ((slurTie()->type() == Element::Type::TIE)
&& (static_cast<Tie*>(slurTie())->endNote())
&& (static_cast<Tie*>(slurTie())->endNote()->chord()->crossMeasure() == CrossMeasure::SECOND))
return;
QPen pen(curColor());
switch (slurTie()->lineType()) {
case 0:
painter->setBrush(QBrush(pen.color()));
pen.setCapStyle(Qt::RoundCap);
pen.setJoinStyle(Qt::RoundJoin);
pen.setWidthF(point(score()->styleS(StyleIdx::SlurEndWidth)));
break;
case 1:
painter->setBrush(Qt::NoBrush);
pen.setWidthF(point(score()->styleS(StyleIdx::SlurDottedWidth)));
pen.setStyle(Qt::DotLine);
break;
case 2:
painter->setBrush(Qt::NoBrush);
pen.setWidthF(point(score()->styleS(StyleIdx::SlurDottedWidth)));
pen.setStyle(Qt::DashLine);
break;
}
painter->setPen(pen);
painter->drawPath(path);
}
//---------------------------------------------------------
// updateGrips
// return grip rectangles in page coordinates
//---------------------------------------------------------
void SlurSegment::updateGrips(Grip* defaultGrip, QVector<QRectF>& r) const
{
*defaultGrip = Grip::END;
QPointF p(pagePos());
p -= QPointF(0.0, system()->staff(staffIdx())->y()); // ??
for (int i = 0; i < int(Grip::GRIPS); ++i)
r[i].translate(_ups[i].p + _ups[i].off * spatium() + p);
}
//---------------------------------------------------------
// searchCR
//---------------------------------------------------------
static ChordRest* searchCR(Segment* segment, int startTrack, int endTrack)
{
// for (Segment* s = segment; s; s = s->next1MM(Segment::Type::ChordRest)) {
for (Segment* s = segment; s; s = s->next(Segment::Type::ChordRest)) { // restrict search to measure
if (startTrack > endTrack) {
for (int t = startTrack-1; t >= endTrack; --t) {
if (s->element(t))
return static_cast<ChordRest*>(s->element(t));
}
}
else {
for (int t = startTrack; t < endTrack; ++t) {
if (s->element(t))
return static_cast<ChordRest*>(s->element(t));
}
}
}
return 0;
}
//---------------------------------------------------------
// edit
// return true if event is accepted
//---------------------------------------------------------
bool SlurSegment::edit(MuseScoreView* viewer, Grip curGrip, int key, Qt::KeyboardModifiers modifiers, const QString&)
{
Slur* sl = static_cast<Slur*>(slurTie());
if (key == Qt::Key_X) {
sl->setSlurDirection(sl->up() ? MScore::Direction::DOWN : MScore::Direction::UP);
sl->layout();
return true;
}
if (key == Qt::Key_Home) {
ups(curGrip).off = QPointF();
sl->layout();
return true;
}
if (slurTie()->type() != Element::Type::SLUR)
return false;
if (!((modifiers & Qt::ShiftModifier)
&& ((spannerSegmentType() == SpannerSegmentType::SINGLE)
|| (spannerSegmentType() == SpannerSegmentType::BEGIN && curGrip == Grip::START)
|| (spannerSegmentType() == SpannerSegmentType::END && curGrip == Grip::END)
)))
return false;
ChordRest* cr = 0;
ChordRest* e = curGrip == Grip::START ? sl->startCR() : sl->endCR();
ChordRest* e1 = curGrip == Grip::START ? sl->endCR() : sl->startCR();
if (key == Qt::Key_Left)
cr = prevChordRest(e);
else if (key == Qt::Key_Right)
cr = nextChordRest(e);
else if (key == Qt::Key_Up) {
Part* part = e->part();
int startTrack = part->startTrack();
int endTrack = e->track();
cr = searchCR(e->segment(), endTrack, startTrack);
}
else if (key == Qt::Key_Down) {
int startTrack = e->track() + 1;
Part* part = e->part();
int endTrack = part->endTrack();
cr = searchCR(e->segment(), startTrack, endTrack);
}
if (cr && cr != e1)
changeAnchor(viewer, curGrip, cr);
return true;
}
//---------------------------------------------------------
// changeAnchor
//---------------------------------------------------------
void SlurSegment::changeAnchor(MuseScoreView* viewer, Grip curGrip, Element* element)
{
if (curGrip == Grip::START) {
spanner()->setStartElement(element);
switch (spanner()->anchor()) {
case Spanner::Anchor::NOTE: {
Tie* tie = static_cast<Tie*>(spanner());
Note* note = static_cast<Note*>(element);
if (note->chord()->tick() <= tie->endNote()->chord()->tick()) {
tie->startNote()->setTieFor(0);
tie->setStartNote(note);
note->setTieFor(tie);
}
break;
}
case Spanner::Anchor::CHORD:
spanner()->setTick(static_cast<Chord*>(element)->tick());
spanner()->setTrack(element->track());
break;
case Spanner::Anchor::SEGMENT:
case Spanner::Anchor::MEASURE:
qDebug("SlurSegment::changeAnchor: bad anchor");
break;
}
}
else {
spanner()->setEndElement(element);
switch (spanner()->anchor()) {
case Spanner::Anchor::NOTE: {
Tie* tie = static_cast<Tie*>(spanner());
Note* note = static_cast<Note*>(element);
// do not allow backward ties
if (note->chord()->tick() >= tie->startNote()->chord()->tick()) {
tie->endNote()->setTieBack(0);
tie->setEndNote(note);
note->setTieBack(tie);
}
break;
}
case Spanner::Anchor::CHORD:
spanner()->setTick2(static_cast<Chord*>(element)->tick());
spanner()->setTrack2(element->track());
break;
case Spanner::Anchor::SEGMENT:
case Spanner::Anchor::MEASURE:
qDebug("SlurSegment::changeAnchor: bad anchor");
break;
}
}
int segments = spanner()->spannerSegments().size();
ups(curGrip).off = QPointF();
spanner()->layout();
if (spanner()->spannerSegments().size() != segments) {
QList<SpannerSegment*>& ss = spanner()->spannerSegments();
SlurSegment* newSegment = static_cast<SlurSegment*>(curGrip == Grip::END ? ss.back() : ss.front());
score()->endCmd();
score()->startCmd();
viewer->startEdit(newSegment, curGrip);
score()->setLayoutAll(true);
}
}
//---------------------------------------------------------
// gripAnchor
//---------------------------------------------------------
QPointF SlurSegment::gripAnchor(Grip grip) const
{
SlurPos spos;
slurTie()->slurPos(&spos);
QPointF sp(system()->pagePos());
QPointF p1(spos.p1 + spos.system1->pagePos());
QPointF p2(spos.p2 + spos.system2->pagePos());
switch (spannerSegmentType()) {
case SpannerSegmentType::SINGLE:
if (grip == Grip::START)
return p1;
else if (grip == Grip::END)
return p2;
break;
case SpannerSegmentType::BEGIN:
if (grip == Grip::START)
return p1;
else if (grip == Grip::END)
return system()->abbox().topRight();
break;
case SpannerSegmentType::MIDDLE:
if (grip == Grip::START)
return sp;
else if (grip == Grip::END)
return system()->abbox().topRight();
break;
case SpannerSegmentType::END:
if (grip == Grip::START)
return sp;
else if (grip == Grip::END)
return p2;
break;
}
return QPointF();
}
//---------------------------------------------------------
// getGrip
//---------------------------------------------------------
QPointF SlurSegment::getGrip(Grip n) const
{
switch (n) {
case Grip::START:
case Grip::END:
return (ups(n).p - gripAnchor(n)) / spatium() + ups(n).off;
default:
return ups(n).off;
}
}
//---------------------------------------------------------
// setGrip
//---------------------------------------------------------
void SlurSegment::setGrip(Grip n, const QPointF& pt)
{
switch (n) {
case Grip::START:
case Grip::END:
ups(n).off = ((pt * spatium()) - (ups(n).p - gripAnchor(n))) / spatium();
break;
default:
ups(n).off = pt;
break;
}
slurTie()->layout();
}
//---------------------------------------------------------
// editDrag
//---------------------------------------------------------
void SlurSegment::editDrag(const EditData& ed)
{
qreal _spatium = spatium();
ups(ed.curGrip).off += (ed.delta / _spatium);
if (ed.curGrip == Grip::START || ed.curGrip == Grip::END) {
slurTie()->computeBezier(this);
//
// move anchor for slurs/ties
//
SpannerSegmentType st = spannerSegmentType();
if (
(ed.curGrip == Grip::START && (st == SpannerSegmentType::SINGLE || st == SpannerSegmentType::BEGIN))
|| (ed.curGrip == Grip::END && (st == SpannerSegmentType::SINGLE || st == SpannerSegmentType::END))
) {
Spanner* spanner = slurTie();
Qt::KeyboardModifiers km = qApp->keyboardModifiers();
Note* note = static_cast<Note*>(ed.view->elementNear(ed.pos));
if (note && note->type() == Element::Type::NOTE &&
((ed.curGrip == Grip::END && note->chord()->tick() > slurTie()->tick())
|| (ed.curGrip == Grip::START && note->chord()->tick() < slurTie()->tick2()))
) {
if (ed.curGrip == Grip::END && spanner->type() == Element::Type::TIE) {
Tie* tie = static_cast<Tie*>(spanner);
if (tie->startNote()->pitch() == note->pitch()
&& tie->startNote()->chord()->tick() < note->chord()->tick()) {
ed.view->setDropTarget(note);
if (note != tie->endNote()) {
changeAnchor(ed.view, ed.curGrip, note);
return;
}
}
}
else if (spanner->type() != Element::Type::TIE && km != (Qt::ShiftModifier | Qt::ControlModifier)) {
Chord* c = note->chord();
ed.view->setDropTarget(note);
if (c != spanner->endCR()) {
changeAnchor(ed.view, ed.curGrip, c);
// QPointF p1 = ed.pos - ups(ed.curGrip).p - canvasPos();
// ups(ed.curGrip).off = p1 / _spatium;
slurTie()->layout();
}
}
}
else
ed.view->setDropTarget(0);
}
}
else if (ed.curGrip == Grip::BEZIER1 || ed.curGrip == Grip::BEZIER2)
slurTie()->computeBezier(this);
else if (ed.curGrip == Grip::SHOULDER) {
ups(ed.curGrip).off = QPointF();
slurTie()->computeBezier(this, ed.delta);
}
else if (ed.curGrip == Grip::DRAG) {
ups(Grip::DRAG).off = QPointF();
setUserOff(userOff() + ed.delta);
}
// if this SlurSegment was automatically adjusted to avoid collision
// lock this edit by resetting SlurSegment to default position
// and incorporating previous adjustment into user offset
QPointF offset = getAutoAdjust();
if (!offset.isNull()) {
setAutoAdjust(0.0, 0.0);
setUserOff(userOff() + offset);
}
}
//---------------------------------------------------------
// writeProperties
//---------------------------------------------------------
void SlurSegment::writeSlur(Xml& xml, int no) const
{
if (ups(Grip::START).off.isNull()
&& ups(Grip::END).off.isNull()
&& ups(Grip::BEZIER1).off.isNull()
&& ups(Grip::BEZIER2).off.isNull()
&& userOff().isNull()
&& visible()
&& (color() == Qt::black)
)
return;
xml.stag(QString("SlurSegment no=\"%1\"").arg(no));
writeProperty(xml, P_ID::SLUR_UOFF1);
writeProperty(xml, P_ID::SLUR_UOFF2);
writeProperty(xml, P_ID::SLUR_UOFF3);
writeProperty(xml, P_ID::SLUR_UOFF4);
Element::writeProperties(xml);
xml.etag();
}
//---------------------------------------------------------
// readSegment
//---------------------------------------------------------
void SlurSegment::read(XmlReader& e)
{
while (e.readNextStartElement()) {
const QStringRef& tag(e.name());
if (tag == "o1")
ups(Grip::START).off = e.readPoint();
else if (tag == "o2")
ups(Grip::BEZIER1).off = e.readPoint();
else if (tag == "o3")
ups(Grip::BEZIER2).off = e.readPoint();
else if (tag == "o4")
ups(Grip::END).off = e.readPoint();
else if (!Element::readProperties(e))
e.unknown();
}
}
//---------------------------------------------------------
// computeBezier
// compute help points of slur bezier segment
//---------------------------------------------------------
void Slur::computeBezier(SlurSegment* ss, QPointF p6o)
{
qreal _spatium = spatium();
qreal shoulderW; // height as fraction of slur-length
qreal shoulderH;
//
// p1 and p2 are the end points of the slur
//
QPointF pp1 = ss->ups(Grip::START).p + ss->ups(Grip::START).off * _spatium;
QPointF pp2 = ss->ups(Grip::END).p + ss->ups(Grip::END).off * _spatium;
QPointF p2 = pp2 - pp1;
if ((p2.x() == 0.0) && (p2.y() == 0.0)) {
Measure* m1 = startCR()->segment()->measure();
Measure* m2 = endCR()->segment()->measure();
qDebug("zero slur at tick %d(%d) track %d in measure %d-%d",
m1->tick(), tick(), track(), m1->no(), m2->no());
return;
}
qreal sinb = atan(p2.y() / p2.x());
QTransform t;
t.rotateRadians(-sinb);
p2 = t.map(p2);
p6o = t.map(p6o);
double smallH = 0.5;
qreal d = p2.x() / _spatium;
if (d <= 2.0) {
shoulderH = d * 0.5 * smallH * _spatium;
shoulderW = .6;
}
else {
qreal dd = log10(1.0 + (d - 2.0) * .5) * 2.0;
if (dd > 3.0)
dd = 3.0;
shoulderH = (dd + smallH) * _spatium;
if (d > 18.0)
shoulderW = 0.7; // 0.8;
else if (d > 10)
shoulderW = 0.6; // 0.7;
else
shoulderW = 0.5; // 0.6;
}
shoulderH -= p6o.y();
if (!up())
shoulderH = -shoulderH;
qreal c = p2.x();
qreal c1 = (c - c * shoulderW) * .5 + p6o.x();
qreal c2 = c1 + c * shoulderW + p6o.x();
QPointF p5 = QPointF(c * .5, 0.0);
QPointF p3(c1, -shoulderH);
QPointF p4(c2, -shoulderH);
qreal w = (score()->styleS(StyleIdx::SlurMidWidth).val() - score()->styleS(StyleIdx::SlurEndWidth).val()) * _spatium;
if ((c2 - c1) <= _spatium)
w *= .5;
QPointF th(0.0, w); // thickness of slur
QPointF p3o = p6o + t.map(ss->ups(Grip::BEZIER1).off * _spatium);
QPointF p4o = p6o + t.map(ss->ups(Grip::BEZIER2).off * _spatium);
if (!p6o.isNull()) {
QPointF p6i = t.inverted().map(p6o) / _spatium;
ss->ups(Grip::BEZIER1).off += p6i ;
ss->ups(Grip::BEZIER2).off += p6i;
}
//-----------------------------------calculate p6
QPointF pp3 = p3 + p3o;
QPointF pp4 = p4 + p4o;
QPointF ppp4 = pp4 - pp3;
qreal r2 = atan(ppp4.y() / ppp4.x());
t.reset();
t.rotateRadians(-r2);
QPointF p6 = QPointF(t.map(ppp4).x() * .5, 0.0);
t.rotateRadians(2 * r2);
p6 = t.map(p6) + pp3 - p6o;
//-----------------------------------
ss->path = QPainterPath();
ss->path.moveTo(QPointF());
ss->path.cubicTo(p3 + p3o - th, p4 + p4o - th, p2);
if (lineType() == 0)
ss->path.cubicTo(p4 +p4o + th, p3 + p3o + th, QPointF());
th = QPointF(0.0, 3.0 * w);
ss->shapePath = QPainterPath();
ss->shapePath.moveTo(QPointF());
ss->shapePath.cubicTo(p3 + p3o - th, p4 + p4o - th, p2);
ss->shapePath.cubicTo(p4 +p4o + th, p3 + p3o + th, QPointF());
// translate back
t.reset();
t.translate(pp1.x(), pp1.y());
t.rotateRadians(sinb);
ss->path = t.map(ss->path);
ss->shapePath = t.map(ss->shapePath);
ss->ups(Grip::BEZIER1).p = t.map(p3);
ss->ups(Grip::BEZIER2).p = t.map(p4);
ss->ups(Grip::END).p = t.map(p2) - ss->ups(Grip::END).off * _spatium;
ss->ups(Grip::DRAG).p = t.map(p5);
ss->ups(Grip::SHOULDER).p = t.map(p6);
QPointF staffOffset;
if (ss->system() && ss->track() >= 0)
staffOffset = QPointF(0.0, -ss->system()->staff(ss->staffIdx())->y());
ss->path.translate(staffOffset);
ss->shapePath.translate(staffOffset);
}
//---------------------------------------------------------
// layout
// p1, p2 are in System coordinates
//---------------------------------------------------------
void SlurSegment::layoutSegment(const QPointF& p1, const QPointF& p2)
{
ups(Grip::START).p = p1;
ups(Grip::END).p = p2;
slurTie()->computeBezier(this);
QRectF bbox = path.boundingRect();
// adjust position to avoid staff line if necessary
Staff* st = staff();
bool reverseAdjust = false;
if (slurTie()->type() == Element::Type::TIE && st && !st->isTabStaff()) {
// multinote chords with ties need special handling
// otherwise, adjusted tie might crowd an unadjusted tie unnecessarily
Tie* t = static_cast<Tie*>(slurTie());
Note* sn = t->startNote();
Chord* sc = sn ? sn->chord() : 0;
// normally, the adjustment moves ties according to their direction (eg, up if tie is up)
// but we will reverse this for notes within chords when appropriate
// for two-note chords, it looks better to have notes on spaces tied outside the lines
if (sc) {
int notes = sc->notes().size();
bool onLine = !(sn->line() & 1);
if ((onLine && notes > 1) || (!onLine && notes > 2))
reverseAdjust = true;
}
}
qreal sp = spatium();
qreal minDistance = 0.5;
autoAdjustOffset = QPointF();
if (bbox.height() < minDistance * 2 * sp && st && !st->isTabStaff()) {
// slur/tie is fairly flat
bool up = slurTie()->up();
qreal ld = st->lineDistance() * sp;
qreal topY = bbox.top() / ld;
qreal bottomY = bbox.bottom() / ld;
int lineY = up ? qRound(topY) : qRound(bottomY);
if (lineY >= 0 && lineY < st->lines() * st->lineDistance()) {
// on staff
if (qAbs(topY - lineY) < minDistance && qAbs(bottomY - lineY) < minDistance) {
// too close to line
if (!isNudged() && !isEdited()) {
// user has not nudged or edited
qreal offY;
if (up != reverseAdjust) // exclusive or
offY = (lineY - minDistance) - topY;
else
offY = (lineY + minDistance) - bottomY;
setAutoAdjust(0.0, offY * sp);
bbox = path.boundingRect();
}
}
}
}
setbbox(path.boundingRect());
if ((staffIdx() > 0) && score()->mscVersion() < 201 && !readPos().isNull()) {
QPointF staffOffset;
if (system() && track() >= 0)
staffOffset = QPointF(0.0, system()->staff(staffIdx())->y());
setReadPos(readPos() + staffOffset);
}
adjustReadPos();
}
//---------------------------------------------------------
// setAutoAdjust
//---------------------------------------------------------
void SlurSegment::setAutoAdjust(const QPointF& offset)
{
QPointF diff = offset - autoAdjustOffset;
if (!diff.isNull()) {
path.translate(diff);
shapePath.translate(diff);
for (int i = 0; i < int(Grip::GRIPS); ++i)
_ups[i].p += diff;
autoAdjustOffset = offset;
}
}
//---------------------------------------------------------
// isEdited
//---------------------------------------------------------
bool SlurSegment::isEdited() const
{
for (int i = 0; i < int(Grip::GRIPS); ++i) {
if (!_ups[i].off.isNull())
return true;
}
return false;
}
//---------------------------------------------------------
// SlurTie
//---------------------------------------------------------
SlurTie::SlurTie(Score* s)
: Spanner(s)
{
_slurDirection = MScore::Direction::AUTO;
_up = true;
_lineType = 0; // default is solid
}
SlurTie::SlurTie(const SlurTie& t)
: Spanner(t)
{
_up = t._up;
_slurDirection = t._slurDirection;
_lineType = t._lineType;
}
//---------------------------------------------------------
// SlurTie
//---------------------------------------------------------
SlurTie::~SlurTie()
{
}
//---------------------------------------------------------
// fixArticulations
//---------------------------------------------------------
static qreal fixArticulations(qreal yo, Chord* c, qreal _up)
{
//
// handle special case of tenuto and staccato;
//
const QList<Articulation*>& al = c->articulations();
if (al.size() >= 2) {
Articulation* a = al.at(1);
if (a->up() == c->up())
return yo;
else if (a->articulationType() == ArticulationType::Tenuto || a->articulationType() == ArticulationType::Staccato)
return a->y() + (a->height() + c->score()->spatium() * .3) * _up;
}
else if (al.size() >= 1) {
Articulation* a = al.at(0);
if (a->up() == c->up())
return yo;
else if (a->articulationType() == ArticulationType::Tenuto || a->articulationType() == ArticulationType::Staccato)
return a->y() + (a->height() + c->score()->spatium() * .3) * _up;
}
return yo;
}
//---------------------------------------------------------
// slurPos
// Calculate position of start- and endpoint of slur
// relative to System() position.
//---------------------------------------------------------
void Slur::slurPosChord(SlurPos* sp)
{
Chord* stChord;
Chord* enChord ;
if (startChord()->isGraceAfter()){ // grace notes after, coming in reverse order
stChord = endChord();
enChord = startChord();
_up = false;
}
else{
stChord = startChord();
enChord = endChord();
}
Note* _startNote = stChord->downNote();
Note* _endNote = enChord->downNote();
qreal hw = _startNote->headWidth();
qreal __up = _up ? -1.0 : 1.0;
qreal _spatium = spatium();
Measure* measure = endChord()->measure();
sp->system1 = measure->system();
if (!sp->system1) // DEBUG
return;
Q_ASSERT(sp->system1);
sp->system2 = sp->system1;
QPointF pp(sp->system1->pagePos());
qreal xo;
qreal yo;
//------p1
if (_up) {
xo = _startNote->x() + hw * 1.12;
yo = _startNote->pos().y() + hw * .3 * __up;
}
else {
xo = _startNote->x() + hw * 0.4;
yo = _startNote->pos().y() + _spatium * .75 * __up;
}
sp->p1 = stChord->pagePos() - pp + QPointF(xo, yo);
//------p2
if ((enChord->notes().size() > 1) || (enChord->stem() && !enChord->up() && !_up)) {
xo = _endNote->x() - hw * 0.12;
yo = _endNote->pos().y() + hw * .3 * __up;
}
else {
xo = _endNote->x() + hw * 0.15;
yo = _endNote->pos().y() + _spatium * .75 * __up;
}
sp->p2 = enChord->pagePos() - pp + QPointF(xo, yo);
}
//---------------------------------------------------------
// slurPos
// calculate position of start- and endpoint of slur
// relative to System() position
//---------------------------------------------------------
void Slur::slurPos(SlurPos* sp)
{
qreal _spatium = spatium();
if (endCR() == 0) {
sp->p1 = startCR()->pagePos();
sp->p1.rx() += startCR()->width();
sp->p2 = sp->p1;
sp->p2.rx() += 5 * _spatium;
sp->system1 = startCR()->measure()->system();
sp->system2 = sp->system1;
return;
}
bool useTablature = staff() != nullptr && staff()->isTabStaff();
bool staffHasStems = true; // assume staff uses stems
StaffType* stt = nullptr;
if (useTablature) {
stt = staff()->staffType();
staffHasStems = stt->stemThrough(); // if tab with stems beside, stems do not count for slur pos
}
ChordRest* scr = startCR();
ChordRest* ecr = endCR();
Chord* sc = 0;
Note* note1 = 0;
if (startCR()->type() == Element::Type::CHORD) {
sc = static_cast<Chord*>(startCR());
note1 = _up ? sc->upNote() : sc->downNote();
}
Chord* ec = 0;
Note* note2 = 0;
if (endCR()->type() == Element::Type::CHORD) {
ec = static_cast<Chord*>(endCR());
note2 = _up ? ec->upNote() : ec->downNote();
}
sp->system1 = scr->measure()->system();
sp->system2 = ecr->measure()->system();
if (sp->system1 == 0 || sp->system2 == 0)
return;
sp->p1 = scr->pagePos() - sp->system1->pagePos();
sp->p2 = ecr->pagePos() - sp->system2->pagePos();
// account for centering or other adjustments (other than mirroring)
if (note1 && !note1->mirror())
sp->p1.rx() += note1->x();
if (note2 && !note2->mirror())
sp->p2.rx() += note2->x();
qreal xo, yo;
Stem* stem1 = sc && staffHasStems ? sc->stem() : 0;
Stem* stem2 = ec && staffHasStems ? ec->stem() : 0;
enum class SlurAnchor : char {
NONE, STEM
};
SlurAnchor sa1 = SlurAnchor::NONE;
SlurAnchor sa2 = SlurAnchor::NONE;
// if slur is 'embedded' between either stem or both (as it might happens with voices)
// link corresponding slur end to stem position
if ((scr->up() == ecr->up()) && !scr->beam() && !ecr->beam() && (_up == scr->up())) {
if (stem1)
sa1 = SlurAnchor::STEM;
if (stem2)
sa2 = SlurAnchor::STEM;
}
qreal __up = _up ? -1.0 : 1.0;
qreal hw1 = note1 ? note1->tabHeadWidth(stt) : startCR()->width(); // if stt == 0, tabHeadWidth()
qreal hw2 = note2 ? note2->tabHeadWidth(stt) : endCR()->width(); // defaults to headWidth()
QPointF pt;
switch (sa1) {
case SlurAnchor::STEM: //sc can't be null
// place slur starting point at stem base point
pt = sc->stemPos() - sc->pagePos() + sc->stem()->p2();
if (useTablature) // in tabs, stems are centred on note:
pt.rx() = hw1 * 0.5; // skip half note head to touch stem
sp->p1 += pt;
sp->p1 += QPointF(0.35 * _spatium, 0.25 * _spatium); // clear the stem (x) and the note head (y)
break;
case SlurAnchor::NONE:
break;
}
switch(sa2) {
case SlurAnchor::STEM: //ec can't be null
pt = ec->stemPos() - ec->pagePos() + ec->stem()->p2();
if (useTablature)
pt.rx() = hw2 * 0.5;
sp->p2 += pt;
sp->p2 += QPointF(-0.35 * _spatium, 0.25 * _spatium);
break;
case SlurAnchor::NONE:
break;
}
//
// default position:
// horizontal: middle of note head
// vertical: _spatium * .4 above/below note head
//
//------p1
// Compute x0, y0 and stemPos
if (sa1 == SlurAnchor::NONE || sa2 == SlurAnchor::NONE) { // need stemPos if sa2 == SlurAnchor::NONE
bool stemPos = false; // p1 starts at chord stem side
xo = hw1 * .5;
if (note1)
yo = note1->pos().y();
else if(_up)
yo = startCR()->bbox().top();
else
yo = startCR()->bbox().top() + startCR()->height();
yo += _spatium * .9 * __up;
if (stem1) { //sc not null
Beam* beam1 = sc->beam();
if (beam1 && (beam1->elements().back() != sc) && (sc->up() == _up)) {
qreal sh = stem1->height() + _spatium;
if (_up)
yo = sc->downNote()->pos().y() - sh;
else
yo = sc->upNote()->pos().y() + sh;
xo = stem1->pos().x();
stemPos = true;
}
else {
if (sc->up() && _up)
xo = hw1 + _spatium * .3;
//
// handle case: stem up - stem down
// stem down - stem up
//
if ((sc->up() != ecr->up()) && (sc->up() == _up)) {
Note* n1 = sc->up() ? sc->downNote() : sc->upNote();
Note* n2 = 0;
if(ec)
n2 = ec->up() ? ec->downNote() : ec->upNote();
qreal yd = (n2 ? n2->pos().y() : endCR()->pos().y()) - n1->pos().y();
yd *= .5;
qreal sh = stem1->height(); // limit y move
if (yd > 0.0) {
if (yd > sh)
yd = sh;
}
else {
if (yd < - sh)
yd = -sh;
}
stemPos = true;
if ((_up && (yd < -_spatium)) || (!_up && (yd > _spatium)))
yo += yd;
}
else if (sc->up() != _up)
yo = fixArticulations(yo, sc, __up);
}
}
else if (sc && sc->up() != _up)
yo = fixArticulations(yo, sc, __up);
if (sa1 == SlurAnchor::NONE)
sp->p1 += QPointF(xo, yo);
//------p2
if (sa2 == SlurAnchor::NONE) {
xo = hw2 * .5;
if (note2)
yo = note2->pos().y();
else if(_up)
yo = endCR()->bbox().top();
else
yo = endCR()->bbox().top() + endCR()->height();
yo += _spatium * .9 * __up;
if (stem2) { //ec can't be null
Beam* beam2 = ec->beam();
if ((stemPos && (scr->up() == ec->up()))
|| (beam2
&& (!beam2->elements().isEmpty())
&& (beam2->elements().front() != ec)
&& (ec->up() == _up)
&& sc && (sc->noteType() == NoteType::NORMAL)
)
) {
qreal sh = stem2->height() + _spatium;
if (_up)
yo = ec->downNote()->pos().y() - sh;
else
yo = ec->upNote()->pos().y() + sh;
xo = stem2->pos().x();
}
else if (!ec->up() && !_up)