// (JB) \bug There is probably a bug somewhere: with map mode
// different than "ISOTROPIC" (proportionnal), beamings polygons between "UP" stems
// draw at an incorrect x position, while "DOWN" beams are always ok.
//
// Too long, needs some code-factorization, if possible.
void GRBeam::tellPosition( GObject * gobj, const NVPoint & p_pos)
{
/* Beams are polygons made of four points:
0 2
------------------
| |
------------------
1 3
*/
// a new test is performed: if it is a systemTag and
// it is not a systemcall (checkpos), than we can just do nothing.
if (error || !mAssociated || ( mAssociated->GetCount() == 0 )
|| ( tagtype == GRTag::SYSTEMTAG && !mIsSystemCall ))
return;
GRNotationElement * el = dynamic_cast<GRNotationElement *>(gobj);
if (!el || !el->getGRStaff())
return;
GRSystemStartEndStruct * sse = getSystemStartEndStruct(el->getGRStaff()->getGRSystem());
assert(sse);
if (el != sse->endElement)
return;
GRBeamSaveStruct * st = (GRBeamSaveStruct *)sse->p;
GuidoPos pos;
GREvent * startEl = GREvent::cast(sse->startElement);
GREvent * endEl = GREvent::cast(sse->endElement);
// this is the staff to which the beam belongs and who draws it.
const GRStaff * beamstaff = sse->startElement->getGRStaff();
PosInfos infos = { dirUP, LSPACE, 1.0f, (endEl == startEl)};
ARBeam * arBeam = getARBeam();
const bool isSpecBeam = arBeam->isGuidoSpecBeam();
if(startEl)
infos.stemdir = startEl->getStemDirection();
else if(endEl)
infos.stemdir = endEl->getStemDirection();
if(level != 0)
return;
NVPoint offset = initp0 (sse, startEl, infos);
initp1 (sse, infos);
offset = initp2 (sse, endEl, infos);
initp3 (sse, infos);
// -----------------------------------------------------------
// Now, we adjust the stemlengths, according to beamslope ...
// we have the start and end-position in st->p
// We have to determine the slope and adjust the slope to minimum and maximum ...
// -----------------------------------------------------------
float stemWidth = st->p[2].x - st->p[0].x;
float slope = (st->p[2].y - st->p[0].y) / stemWidth;
// another hack to control the slope when events are on different staves - DF sept 15 2009
if (startEl && endEl && (startEl->getGRStaff() != endEl->getGRStaff())) {
while ((slope < -0.20) || (slope > 0.20)) {
float shift = (slope < 0) ? -LSPACE/4 : LSPACE/4;
st->p[0].y += shift;
st->p[1].y += shift;
st->p[2].y -= shift;
st->p[3].y -= shift;
slope = (st->p[2].y - st->p[0].y) / stemWidth;
}
}
bool needsadjust = true;
// we have to adjust the slope ONLY if the stemlength
// of the first and last element has not been set automatically!
// and if we are note in the case of a chained feather beam
if ( (startEl && startEl->getStemLengthSet() && endEl && endEl->getStemLengthSet())
|| tagtype == SYSTEMTAG || (arBeam && isSpecBeam) || (isFeathered && startEl && startEl->stemHasBeenChanged()))
{
needsadjust = false;
}
else slopeAdjust (sse, startEl, endEl, slope, infos);
if (arBeam && isSpecBeam)
{
// then we have to set the length ... if it is not set otherwise ...
GRSingleNote * nt = dynamic_cast<GRSingleNote *>(sse->startElement);
if(nt && !nt->getStemLengthSet()) {
const float myval = arBeam->dy1->getValue();
nt->setStemLength( myval);
}
nt = dynamic_cast<GRSingleNote *>(sse->endElement);
if(nt && !nt->getStemLengthSet()) {
float myval;
if (arBeam->dy3 && arBeam->dy3->TagIsSet())
myval = arBeam->dy3->getValue();
else
myval = arBeam->dy1->getValue();
nt->setStemLength( myval);
}
}
float offsetbeam = 0;
// nobeamoffset describes, if no beamoffset is valid: if notes ask for different beam-offsets
// then, there is just no offset .... things must be changed manually then ....
bool nobeamoffset = false;
if(( startEl && startEl->getStemLengthSet()) || ( endEl && endEl->getStemLengthSet()))
nobeamoffset = true;
for (int counter = 0; counter < 2; ++counter )
{
if (counter == 1) {
if ((offsetbeam == 0) || nobeamoffset) break;
else if (!nobeamoffset) {
st->p[0].y -= offsetbeam;
st->p[1].y -= offsetbeam;
st->p[2].y -= offsetbeam;
st->p[3].y -= offsetbeam;
offsetbeam = 0;
}
}
pos = sse->startpos;
while (pos)
{
// now we calculate the stem-end-positions ...
GuidoPos oldpos = pos;
GREvent * sn = GREvent::cast(mAssociated->GetNext(pos));
if (sn)
{
float rx = sn->getStemStartPos().x - st->p[0].x;
if (tagtype == SYSTEMTAG)
rx += sn->getGRStaff()->getPosition().x;
float disty = st->p[2].y - st->p[0].y;
float distx = st->p[2].x - st->p[0].x;
float ly = disty / distx * rx;
ly += st->p[0].y;
float diffy = (float)sn->getStemStartPos().y;
GDirection adjustdir=dirAUTO;
if (sn->getStemDirection() == dirUP)
{
diffy += (float)sn->getStemLength();
adjustdir = dirUP;
}
else if (sn->getStemDirection() == dirDOWN)
{
adjustdir = dirDOWN;
diffy -= (float)sn->getStemLength();
}
ly -= diffy;
if (tagtype == SYSTEMTAG)
ly -= (float)sn->getGRStaff()->getPosition().y;
// if we have a beam between grace notes, we don't want an offbase that whould make the stems too long
GRNote * gnote = dynamic_cast<GRNote*>(startEl);
bool isGrace = gnote ? gnote->isGraceNote() : false;
float offbase = isGrace ? 0 : 3.5f * infos.currentLSPACE;
if (ly < 0)
{
if (needsadjust) {
if (adjustdir == dirDOWN)
{
const float newoffs = ly - offbase;
if (newoffs < offsetbeam)
{
if (offsetbeam > 0)
{
GuidoTrace("WARNING: different beam adjustments!");
nobeamoffset = true;
}
else offsetbeam = newoffs;
}
ly = -offbase;
}
else if (ly > -offbase)
{
const float newoffs = ly + offbase;
if (newoffs > offsetbeam)
{
if (offsetbeam < 0)
{
GuidoTrace("WARNING: different beam adjustments!");
nobeamoffset = true;
}
else offsetbeam = newoffs;
}
}
}
ly = -ly;
}
else if (needsadjust) {
if (adjustdir == dirUP)
{
const float newoffs = ly + offbase;
if (newoffs > offsetbeam)
{
if (offsetbeam < 0)
{
GuidoTrace("WARNING: different beam adjustments!");
nobeamoffset = true;
}
else offsetbeam = newoffs;
}
ly = offbase;
}
else if (ly < offbase)
{
const float newoffs = ly - offbase;
if (newoffs < offsetbeam)
{
if (offsetbeam > 0)
{
GuidoTrace("WARNING: different beam adjustments!");
nobeamoffset = true;
}
else offsetbeam = newoffs;
}
}
}
// sn->changeStemLength( ly );
// adjusted - DF sept 15 2009
sn->changeStemLength( ly - infos.currentLSPACE/20 );
// so that the possible next featherd beam knows that he is chained
// (and musn't change its slope)
sn->setStemChanged();
}
if (oldpos == sse->endpos)
break;
}
//endEl->setStemChanged();
}
if(!smallerBeams.empty())
{
for(std::vector<GRBeam *>::iterator it = smallerBeams.begin(); it < smallerBeams.end(); it++)
{
(*it)->decLevel();
(*it)->tellPosition((*it)->getEndElement(), (*it)->getEndElement()->getPosition());
}
return;
}
// -- Now we need to add the simplebeams as simplebeamgroups ...
NVPoint myp[4];
int dir = st->direction;
if (st->dirset)
{
// then the direction was set explicitly by the user ...
GREvent * sn = GREvent::cast(mAssociated->GetHead());
if (sn)
dir = sn->getStemDirection();
}
else dir = infos.stemdir;
bool first = true;
pos = sse->startpos;
// - These constants define the space and the thickness of additionnal beams.
const float yFact1 = 0.75f * infos.currentLSPACE; // was 0.7f
const float yFact2 = 0.4f * infos.currentLSPACE;
// if we have a feathered beam, we just have to draw the main beam (already done)
// and the other simple beams will only depend on the begining and ending
// points, regardless of the durations of the inner notes.
if(isFeathered)
{
ARFeatheredBeam * ar = static_cast<ARFeatheredBeam *>(getARBeam()->isARFeatheredBeam());
int begin = 0;
int end = 0;
GREvent * stemNoteBegin = GREvent::cast(mAssociated->GetHead());
GDirection localDir = stemNoteBegin->getStemDirection();
float yLocalFact1 = yFact1 * localDir * infos.currentSize;
float yLocalFact2 = yFact2 * localDir * infos.currentSize;
// if the user hasn't set the durations as parameters,
// we will take the first and last notes'durations
if(!ar->isDurationsSet())
{
ar->findDefaultPoints();
}
end = ar->getLastBeaming();
begin = ar->getFirstBeaming();
for(int i=1;i<=begin; i++)
{
myp[0] = st->p[0];
myp[0].y += (i-1) * yLocalFact1;
myp[1].x = myp[0].x;
myp[1].y = myp[0].y + yLocalFact2;
myp[2] = st->p[2];
if(end>i ||(end==i && i!=1)) // no need to draw the main beam again.
myp[2].y += (i-1) * yLocalFact1;
else
myp[2].y += (end-1) * yLocalFact1;
myp[3].x = myp[2].x;
myp[3].y = myp[2].y + yLocalFact2;
GRSimpleBeam * tmpbeam = new GRSimpleBeam(this,myp);
if( st->simpleBeams == 0 )
st->simpleBeams = new SimpleBeamList(1);
st->simpleBeams->AddTail(tmpbeam);
}
// if end > begin
for(int i=begin; i<end; i++)
{
myp[0] = st->p[0];
myp[0].y += (begin-1) * yLocalFact1;
myp[1].x = myp[0].x;
myp[1].y = myp[0].y + yLocalFact2;
myp[2] = st->p[2];
myp[2].y += i * yLocalFact1;
myp[3].x = myp[2].x;
myp[3].y = myp[2].y + yLocalFact2;
GRSimpleBeam * tmpbeam = new GRSimpleBeam(this,myp);
if( st->simpleBeams == 0 )
st->simpleBeams = new SimpleBeamList(1);
st->simpleBeams->AddTail(tmpbeam);
}
// in order to draw the total duration of the beam
if(drawDur)
{
TYPE_TIMEPOSITION begin = ar->getBeginTimePosition();
TYPE_TIMEPOSITION end = ar->getEndTimePosition();
TYPE_DURATION dur = end - begin;
int num = dur.getNumerator();
int den = dur.getDenominator();
stringstream out;
out << num << '/' << den;
st->duration = out.str();
size_t n = st->duration.length();
GREvent * ev = dynamic_cast<GREvent *>(mAssociated->GetHead());
const NVPoint p1 = ev->getStemEndPos();
float xBegin = ev->getPosition().x;
ev = dynamic_cast<GREvent *>(mAssociated->GetTail());
const NVPoint p2 = ev->getStemEndPos();
float xEnd = ev->getPosition().x + ev->getBoundingBox().Width()/2;
int dir = ev->getStemDirection();
float Y1;
float Y2;
if(dir>0)
{
Y1 = min(p1.y, p2.y) - LSPACE;
if(Y1>=getLastPositionOfBarDuration().first && Y1<getLastPositionOfBarDuration().second+LSPACE/2)
Y1 -= LSPACE;
Y2 = Y1 - LSPACE/2;
getLastPositionOfBarDuration().first = Y2;
getLastPositionOfBarDuration().second = Y1;
}
else
{
Y1 = max(p1.y, p2.y) + LSPACE;
if(Y1>=getLastPositionOfBarDuration().first-LSPACE/2 && Y1<getLastPositionOfBarDuration().second)
Y1 += LSPACE;
Y2 = Y1 + LSPACE/2;
getLastPositionOfBarDuration().first = Y1;
getLastPositionOfBarDuration().second = Y2;
}
if (xBegin > xEnd)
{
if (sse->endflag == GRSystemStartEndStruct::OPENRIGHT)
xEnd = sse->endElement->getPosition().x;
if (sse->startflag == GRSystemStartEndStruct::OPENLEFT)
xBegin = sse->startElement->getPosition().x;
}
float x = xBegin + (xEnd - xBegin) / 2;
float X1 = x - (n - 0.5f) / 2 * LSPACE;
float X2 = x + (n - 0.5f) / 2 * LSPACE;
st->DurationLine[0] = NVPoint(xBegin, Y1);
st->DurationLine[1] = NVPoint(xBegin, Y2);
st->DurationLine[2] = NVPoint(X1, Y2);
st->DurationLine[3] = NVPoint(X2, Y2);
st->DurationLine[4] = NVPoint(xEnd, Y2);
st->DurationLine[5] = NVPoint(xEnd, Y1);
}
}
// for beam length adjustment - DF sept 15 2009
const float xadjust = infos.currentLSPACE/10;
GDirection lastLocalDir = dirOFF;
int previousBeamsCount = 0;
while (pos && !isFeathered)
{
GuidoPos oldpos = pos;
GREvent * stemNote = GREvent::cast(mAssociated->GetNext(pos));
if (stemNote)
{
GDirection localDir = stemNote->getStemDirection();
float yLocalFact1 = yFact1 * localDir * infos.currentSize;
float yLocalFact2 = yFact2 * localDir * infos.currentSize;
// now we check the number of beams ...
if (stemNote->getBeamCount() < stemNote->getNumFaehnchen())
{
float beamCount = (float)(stemNote->getBeamCount());
stemNote->incBeamCount();
if (first && (sse->startflag == GRSystemStartEndStruct::OPENLEFT)) {
// the additional beam starts at the startElement (glue), we have more beams to draw
myp[0] = sse->startElement->getPosition();
if (tagtype == SYSTEMTAG)
myp[0] += stemNote->getGRStaff()->getPosition();
myp[1] = myp[0];
// first = false; // never read (according to clang :-)
}
else {
// the additional beam starts at sn. We have more beams to draw
myp[0] = stemNote->getStemStartPos();
if (tagtype == SYSTEMTAG)
myp[0] += stemNote->getGRStaff()->getPosition();
myp[0].y += beamCount * yLocalFact1;
if (localDir != dir)
myp[0].y -= yLocalFact2;
myp[1].x = myp[0].x;
myp[1].y = myp[0].y + yLocalFact2;
}
// now we look for the endposition
GREvent * sn2 = NULL;
GuidoPos tmppos = pos;
// partialbeam is set, if the new SimpleBeam only covers part of the masterBeam.
int partialbeam = 0;
while (tmppos)
{
GuidoPos oldpos2 = tmppos;
GREvent * tmpsn = GREvent::cast(mAssociated->GetNext(tmppos));
if (tmpsn) {
if (tmpsn->getBeamCount() < tmpsn->getNumFaehnchen())
{
sn2 = tmpsn;
sn2->incBeamCount();
continue;
}
else
{
partialbeam = 1;
break;
}
}
if (oldpos2 == sse->endpos)
break;
}
if (sn2)
{
if (!partialbeam && sse->endflag == GRSystemStartEndStruct::OPENRIGHT)
{
// then the position is different ...
myp[2] = sse->endElement->getPosition();
myp[2].x += xadjust;
if (tagtype == SYSTEMTAG)
myp[2] += sn2->getGRStaff()->getPosition();
myp[2].y = myp[0].y;
}
else
{
// we have an End-Position ...
myp[2] = sn2->getStemEndPos();
myp[2].x += xadjust;
if (tagtype == SYSTEMTAG)
myp[2] += sn2->getGRStaff()->getPosition();
myp[2].y += beamCount * yLocalFact1;
}
if (localDir != dir)
myp[2].y -= yLocalFact2;
myp[3].x = myp[2].x;
myp[3].y = myp[2].y + yLocalFact2;
}
else
{
// we do not have an End-Positon single beam ... (meaning a single straight flag)
// but only, if it is not open on the left or the right hand side.
const float slope = (float)(st->p[2].y - st->p[0].y ) / (float)(st->p[2].x - st->p[0].x);
if (sse->startflag == GRSystemStartEndStruct::OPENLEFT)
{
// then we have to deal with the startposition of the glue-element ....
// BUT, you can only set this, if the previous beam had this beamcount at the end ....
// how do I know that? not now.
// sn is the only element .... and we are open on the left ...
if (tagtype == SYSTEMTAG)
myp[0] += stemNote->getGRStaff()->getPosition();
myp[1] = myp[0];
myp[2] = stemNote->getStemEndPos();
myp[2].x += xadjust;
if (tagtype == SYSTEMTAG)
myp[2] += stemNote->getGRStaff()->getPosition();
myp[2].y += beamCount * yLocalFact1;
if (localDir != dir)
myp[2].y -= yLocalFact2;
myp[3] = myp[2];
myp[3].y += yLocalFact2;
}
else if (sse->endflag == GRSystemStartEndStruct::OPENRIGHT)
{
myp[0] = stemNote->getStemEndPos();
if (tagtype == SYSTEMTAG)
myp[0] += stemNote->getGRStaff()->getPosition();
myp[0].y += beamCount * yLocalFact1;
if (localDir != dir)
myp[0].y -= yLocalFact2;
myp[1] = myp[0];
myp[1].y += yLocalFact2;
myp[2] = sse->endElement->getPosition();
myp[2].x += xadjust;
if (tagtype == SYSTEMTAG)
myp[2] += sn2->getGRStaff()->getPosition();
myp[2].y = myp[0].y;
myp[3].x = myp[2].x;
myp[3].y = myp[1].y;
}
/* 26/11/03
Beaming bug: wrong direction for partial beam (beam-bug.gmn)
can be tested but changing this test.
startpos check added to correct problem with partial beam
going outside a group like in [ _/16 c d/8 ]
*/
else if( oldpos == sse->endpos || pos == NULL || ((!stemNote->isSyncopated()) && (oldpos != sse->startpos)))
{
// Partial beams leftward ( using slope)
myp[2] = stemNote->getStemEndPos();
myp[2].x += xadjust;
if (tagtype == SYSTEMTAG)
myp[2] += stemNote->getGRStaff()->getPosition();
if (localDir != dir)
myp[2].y -= yLocalFact2;
myp[2].y += beamCount * yLocalFact1;
myp[3] = myp[2];
myp[3].y += yLocalFact2;
myp[0] = myp[2];
myp[0].x -= infos.currentLSPACE;
myp[0].y -= slope * infos.currentLSPACE;
myp[1] = myp[0];
myp[1].y += yLocalFact2;
// ? We are at the end, there is no valid event at the end ... so what do we do?
// useless tests: the code was the same and is now outside the test (above) - DF sept 15 2009
/*
if (sse->endflag == GRSystemStartEndStruct::OPENRIGHT)
{
}
else
{
}
*/
}
else
{
// Partial beams rightward ( using slope)
myp[2] = myp[0];
myp[2].x += infos.currentLSPACE;
myp[2].y += slope * infos.currentLSPACE;
myp[3] = myp[2];
myp[3].y += yLocalFact2;
}
}
// now we construct a SimpleBeam, we now have to "undo" the systemTag-stuff
if (tagtype == SYSTEMTAG)
{
const NVPoint & offset = beamstaff->getPosition();
myp[0] -= offset;
myp[1] -= offset;
myp[2] -= offset;
myp[3] -= offset;
}
if (sse->startflag == GRSystemStartEndStruct::OPENLEFT)
{
myp[0].y = myp[2].y;
myp[1].y = myp[3].y;
}
GRSimpleBeam * tmpbeam = new GRSimpleBeam(this,myp);
if( st->simpleBeams == 0 )
st->simpleBeams = new SimpleBeamList(1);
st->simpleBeams->AddTail(tmpbeam);
pos = sse->startpos;
oldpos = pos;
first = true;
lastLocalDir = localDir;
previousBeamsCount = stemNote->getBeamCount() - 1;
}
// a new hack, again to catch stems directions change - DF sept 15 2009
else if (localDir != dir) {
// check for stems length
NVPoint stemloc = stemNote->getStemStartPos();
if (tagtype == SYSTEMTAG)
stemloc += stemNote->getGRStaff()->getPosition();
int beamscount = stemNote->getBeamCount() - 1;
if ((beamscount > 0) && (previousBeamsCount > beamscount) && (lastLocalDir != localDir)) {
if (localDir == dirUP)
stemNote->changeStemLength(stemNote->getStemLength() + (yLocalFact1 * beamscount));
else if (localDir == dirDOWN)
stemNote->changeStemLength(stemNote->getStemLength() - (yLocalFact1 * beamscount));
}
}
}
if (oldpos == sse->endpos)
break;
}
GuidoPos stemPos = sse->startpos;
while(stemPos)
{
GREvent * stemNote = GREvent::cast(mAssociated->GetNext(stemPos));
if(stemNote)
{
GuidoPos tagpos = NULL;
if (stemNote->getAssociations())
tagpos = stemNote->getAssociations()->GetHeadPosition();
while(tagpos)
{
GRNotationElement * tag = stemNote->getAssociations()->GetNext(tagpos);
GRTremolo * trem = dynamic_cast<GRTremolo*>(tag);
if(trem)
{
trem->tellPosition(stemNote,stemNote->getPosition());
if(trem->isTwoNotesTremolo()) // in order to force the second pitch (especially the chords) to update
{
GREvent * secondPitch = dynamic_cast<GREvent*>(mAssociated->GetNext(stemPos));
if(secondPitch) trem->tellPosition(secondPitch, secondPitch->getPosition());
}
}
}
}
}
// now we have to make sure, that the original positions
// for the beam are set for the right staff
if (tagtype == SYSTEMTAG)
{
const NVPoint &offset = beamstaff->getPosition();
st->p[0] -= offset;
st->p[1] -= offset;
st->p[2] -= offset;
st->p[3] -= offset;
}
}
/** Places the tuplet bracket and/or numeral, close to its group of notes.
Calculates the positions of the two possible tuplet bracket (above
and below) then choose the best one.
*/
void GRTuplet::automaticPosition(GObject * caller, const NVPoint & inPos )
{
GREvent * callerEv = GREvent::cast( caller );
if( callerEv == 0 ) return;
GRStaff * staff = callerEv->getGRStaff();
if( staff == 0 ) return;
GRSystemStartEndStruct * sse = getSystemStartEndStruct(staff->getGRSystem());
if( sse == 0 ) return;
GRTupletSaveStruct * st = (GRTupletSaveStruct *)sse->p;
if( st == 0 ) return;
GREvent * startElement = GREvent::cast( sse->startElement );
if( startElement == 0 ) return;
GREvent * endElement = GREvent::cast( sse->endElement );
if( endElement == 0 ) return;
// - Accept being positioned only once, if possible by the last tuplet element.
//if(( callerEv != endElement ) && ((callerEv != startElement) || (endElement != 0)))
if( callerEv != endElement )
return;
// - Check for beams
const bool firstBeamed = (startElement->getBeamCount() > 0);
const bool lastBeamed = (endElement->getBeamCount() > 0);
mShowLeftBrace = !(firstBeamed && lastBeamed );
mShowRightBrace = mShowLeftBrace;
// - Get first and last element positions to work with
float startX, endX;
endX = 0;
float startUpY, startDownY, endUpY, endDownY;
// x positions
const float halfNoteWidth = LSPACE * float(0.65); // harcoded
startX = startElement->getPosition().x;
endX = endElement->getPosition().x;
// if( endX == startX ) return; // DF commented: results in strange vertical bars
startX -= halfNoteWidth;
endX += halfNoteWidth;
// y positions
const NVRect & leftBox = startElement->getBoundingBox();
const NVRect & rightBox = endElement->getBoundingBox();
const float elPos1y = startElement->getPosition().y;
const float elPos2y = endElement->getPosition().y;
startUpY = leftBox.top + elPos1y;
endUpY = rightBox.top + elPos2y;
startDownY = leftBox.bottom + elPos1y;
endDownY = rightBox.bottom + elPos2y;
// - Calculate a virtual line from the first to the last element,
int stemStats = 0;
const float deltaX = (endX - startX);
float slopeUp = (endUpY - startUpY) / deltaX; // slope of the virtal line above
float slopeDown = (endDownY - startDownY) / deltaX; // slope of the virtal line below
float x, yUp, yDown, distUp, distDown;
float mxUp = 0, myUp = 0, mxDown = 0, myDown = 0; // 'extreme' middle point
bool collideUp = false;
bool collideDown = false;
GuidoPos pos = mAssociated->GetHeadPosition();
while( pos )
{
GREvent * el = GREvent::cast( mAssociated->GetNext(pos));
if( el == 0 ) continue;
// - Generate stats about stem directions
GDirection stemDir = el->getStemDirection();
if( stemDir == dirUP ) ++ stemStats;
else if( stemDir == dirDOWN ) -- stemStats;
if(( el != startElement ) && ( el != endElement ))
{
// - Get the element box
const NVRect & elBox = el->getBoundingBox();
const NVPoint & elPos = el->getPosition();
x = elPos.x;
yUp = elBox.top + elPos.y;
yDown = elBox.bottom + elPos.y;
// - Calculate the y-distance between the element and the virtual line.
// distY = startY - (y - slope * (x - startX));
distUp = (startUpY - yUp) + (x - startX) * slopeUp;
distDown = (startDownY - yDown) + (x - startX) * slopeDown;
if( distUp > 0 ) // then the point is above the virtual line
{
mxUp = x;
myUp = yUp;
collideUp = true;
//startUpY -= distUp; // TODO: better handling of this collision
//endUpY -= distUp;
}
if( distDown < 0 ) // then the point is below the virtual line
{
mxDown = x;
myDown = yDown;
collideDown = true;
//startDownY -= distDown;
//endDownY -= distDown;
}
}
}
// - Adjust the brace to avoid collisions. It must be above (or below) all elements,
// while remaining close to those elements, and avoid being in the staff.
// brace 1 (upward)
if( collideUp )
{
if(( myUp <= startUpY ) && ( myUp <= endUpY )) // middle point above start and end points
{
// slopeUp = 0; // horizontal
startUpY = myUp;
endUpY = myUp;
}
else
{
if( myUp <= endUpY ) // middle point above end point only: shift the end point up
{
slopeUp = (myUp - startUpY) / (mxUp - startX);
endUpY = startUpY + (deltaX * slopeUp);
}
else // middle point above start point only: shift the start point up
{
slopeUp = (endUpY - myUp) / (endX - mxUp);
startUpY = endUpY - (deltaX * slopeUp);
}
}
}
// brace 2 (downward)
if( collideDown )
{
if(( myDown >= startDownY ) && ( myDown >= endDownY )) // middle point below start and end points
{
// slopeDown = 0; // horizontal
startDownY = myDown;
endDownY = myDown;
}
else
{
if( myDown >= endDownY ) // middle point below end point only: shift the end point down
{
slopeDown = (myDown - startDownY) / (mxDown - startX);
endDownY = startDownY + (deltaX * slopeDown);
}
else // middle point below start point only: shift the start point down
{
slopeDown = (endDownY - myDown) / (endX - mxDown);
startDownY = endDownY - (deltaX * slopeDown);
}
}
}
// - Avoid being inside staff
if( startUpY > 0 ) startUpY = 0;
if( endUpY > 0 ) endUpY = 0;
const float staffHeight = staff->getDredgeSize();
if( startDownY < staffHeight ) startDownY = staffHeight;
if( endDownY < staffHeight ) endDownY = staffHeight;
// - Tune
float marginY = LSPACE * float(1.25);
startUpY -= marginY;
endUpY -= marginY;
startDownY += marginY;
endDownY += marginY;
// - Choose the best solution (above or below)
// We put the brace and the tuplet numeral on the stem side.
float startY;
float endY;
if( stemStats >= 0 ) // stems tend to be up.
{
mDirection = dirUP;
startY = startUpY;
endY = endUpY;
}
else
{
mDirection = dirDOWN;
startY = startDownY;
endY = endDownY;
}
// - Store results
const float textOffsetY = LSPACE;
st->p1.x = startX;
st->p1.y = startY;
st->p2.x = endX;
st->p2.y = endY;
st->textpos.x = (startX + endX) * float(0.5);
st->textpos.y = (startY + endY) * float(0.5) + textOffsetY - 9;
}