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MuseScore/libmscore/timesig.cpp
Werner Schweer 1f9ccfcdce add libmscore 
git-subtree-dir: libmscore
git-subtree-mainline: 412ca45401
git-subtree-split: 6047361bd0
2012-05-26 14:54:47 +02:00

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//=============================================================================
// MuseScore
// Music Composition & Notation
// $Id: timesig.cpp 5568 2012-04-22 10:08:43Z wschweer $
//
// 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 "timesig.h"
#include "xml.h"
#include "score.h"
#include "style.h"
#include "sym.h"
#include "symbol.h"
#include "staff.h"
#include "stafftype.h"
//---------------------------------------------------------
// TimeSig
//---------------------------------------------------------
TimeSig::TimeSig(Score* s)
: Element(s)
{
setFlags(ELEMENT_SELECTABLE | ELEMENT_ON_STAFF);
_showCourtesySig = true;
customText = false;
_stretch.set(1, 1);
setSubtype(TSIG_NORMAL);
}
TimeSig::TimeSig(Score* s, TimeSigType st)
: Element(s)
{
setFlags(ELEMENT_SELECTABLE | ELEMENT_ON_STAFF);
_showCourtesySig = true;
customText = false;
_stretch.set(1, 1);
setSubtype(st);
}
TimeSig::TimeSig(Score* s, int z, int n)
: Element(s)
{
setFlags(ELEMENT_SELECTABLE | ELEMENT_ON_STAFF);
_showCourtesySig = true;
customText = false;
_stretch.set(1, 1);
setSig(Fraction(z, n));
setSubtype(TSIG_NORMAL);
}
TimeSig::TimeSig(Score* s, const Fraction& f)
: Element(s)
{
setFlags(ELEMENT_SELECTABLE | ELEMENT_ON_STAFF);
_showCourtesySig = true;
customText = false;
_stretch.set(1, 1);
setSig(f);
setSubtype(TSIG_NORMAL);
}
//---------------------------------------------------------
// setSubtype
//---------------------------------------------------------
void TimeSig::setSubtype(TimeSigType st)
{
switch (st) {
case TSIG_NORMAL:
break;
case TSIG_FOUR_FOUR:
setSig(Fraction(4, 4));
customText = false;
break;
case TSIG_ALLA_BREVE:
setSig(Fraction(2, 2));
customText = false;
break;
default:
qDebug("illegal TimeSig subtype 0x%x\n", st);
break;
}
_subtype = st;
}
//---------------------------------------------------------
// acceptDrop
//---------------------------------------------------------
bool TimeSig::acceptDrop(MuseScoreView*, const QPointF&, Element* e) const
{
return e->type() == TIMESIG;
}
//---------------------------------------------------------
// drop
//---------------------------------------------------------
Element* TimeSig::drop(const DropData& data)
{
Element* e = data.element;
if (e->type() == TIMESIG) {
// change timesig applies to all staves, can't simply set subtype
// for this one only
// ownership of e is transferred to cmdAddTimeSig
score()->cmdAddTimeSig(measure(), staffIdx(), static_cast<TimeSig*>(e));
return 0;
}
delete e;
return 0;
}
//---------------------------------------------------------
// setText
//---------------------------------------------------------
void TimeSig::setText(const QString& a, const QString& b)
{
sz = a;
sn = b;
customText = !(a.isEmpty() && b.isEmpty());
}
//---------------------------------------------------------
// setActualSig
//---------------------------------------------------------
void TimeSig::setActualSig(const Fraction& actual)
{
_stretch = (_nominal / actual).reduced();
qDebug("setActual %d/%d stretch %d/%d\n",
actual.numerator(), actual.denominator(),
_stretch.numerator(), _stretch.denominator());
}
//---------------------------------------------------------
// write TimeSig
//---------------------------------------------------------
void TimeSig::write(Xml& xml) const
{
xml.stag("TimeSig");
if (subtype() != TSIG_NORMAL)
xml.tag("subtype", subtype());
Element::writeProperties(xml);
xml.tag("sigN", _nominal.numerator());
xml.tag("sigD", _nominal.denominator());
if (_stretch != Fraction(1,1)) {
xml.tag("stretchN", _stretch.numerator());
xml.tag("stretchD", _stretch.denominator());
}
if (customText) {
xml.tag("textN", sz);
xml.tag("textD", sn);
}
xml.tag("showCourtesySig", _showCourtesySig);
xml.etag();
}
//---------------------------------------------------------
// TimeSig::read
//---------------------------------------------------------
void TimeSig::read(const QDomElement& de)
{
int n=0, z1=0, z2=0, z3=0, z4=0;
bool old = false;
customText = false;
_stretch.set(1, 1);
for (QDomElement e = de.firstChildElement(); !e.isNull(); e = e.nextSiblingElement()) {
const QString& tag(e.tagName());
const QString& val(e.text());
if (tag == "den") {
old = true;
n = val.toInt();
}
else if (tag == "nom1") {
old = true;
z1 = val.toInt();
}
else if (tag == "nom2") {
old = true;
z2 = val.toInt();
}
else if (tag == "nom3") {
old = true;
z3 = val.toInt();
}
else if (tag == "nom4") {
old = true;
z4 = val.toInt();
}
else if (tag == "subtype") {
TimeSigType i = TimeSigType(val.toInt());
if (score()->mscVersion() < 122) {
setSig(Fraction(
((i >> 24) & 0x3f)
+ ((i >> 18) & 0x3f)
+ ((i >> 12) & 0x3f)
+ ((i >> 6) & 0x3f), i & 0x3f));
i = TSIG_NORMAL;
}
setSubtype(i);
}
else if (tag == "showCourtesySig")
_showCourtesySig = val.toInt();
else if (tag == "sigN")
_nominal.setNumerator(val.toInt());
else if (tag == "sigD")
_nominal.setDenominator(val.toInt());
else if (tag == "stretchN")
_stretch.setNumerator(val.toInt());
else if (tag == "stretchD")
_stretch.setDenominator(val.toInt());
else if (tag == "textN") {
customText = true;
sz = val;
}
else if (tag == "textD") {
customText = true;
sn = val;
}
else if (!Element::readProperties(e))
domError(e);
}
if (old) {
_nominal.set(z1+z2+z3+z4, n);
customText = false;
if (subtype() == 0x40000104)
setSubtype(TSIG_FOUR_FOUR);
else if (subtype() == 0x40002084)
setSubtype(TSIG_ALLA_BREVE);
else
setSubtype(TSIG_NORMAL);
}
}
//---------------------------------------------------------
// layout
//---------------------------------------------------------
void TimeSig::layout()
{
qreal _spatium = spatium();
setbbox(QRectF()); // prepare for an empty time signature
pz = QPointF(0.0, 0.0);
pn = QPointF(0.0, 0.0);
int st = subtype();
qreal lineDist = 1.0; // assume dimensions a standard staff
int numOfLines = 5;
if (staff()) {
StaffType* staffType = staff()->staffType();
numOfLines = staff()->staffType()->lines();
lineDist = staff()->staffType()->lineDistance().val();
// if tablature, but without time sig, set empty symbol
if ((staffType->group() == TAB_STAFF) &&
!(static_cast<StaffTypeTablature*>(staffType)->genTimesig())) {
st = 0;
}
}
// if some symbol
// compute vert. displacement to center in the staff height
// determine middle staff position:
qreal yoff = _spatium * (numOfLines-1) *.5 * lineDist;
qreal mag = magS();
// C and Ccut are placed at the middle of the staff: use yoff directly
if (st == TSIG_FOUR_FOUR) {
pz = QPointF(0.0, yoff);
Sym& sym = symbols[score()->symIdx()][fourfourmeterSym];
setbbox(sym.bbox(mag).translated(pz));
sz = sym.toString();
sn.clear();
}
else if (st == TSIG_ALLA_BREVE) {
pz = QPointF(0.0, yoff);
Sym& sym = symbols[score()->symIdx()][allabreveSym];
setbbox(sym.bbox(mag).translated(pz));
sz = sym.toString();
sn.clear();
}
else {
if (!customText) {
Fraction f(actualSig());
sz = QString("%1").arg(f.numerator()); // build numerator string
sn = QString("%1").arg(f.denominator()); // build denominator string
}
QFontMetricsF fm(fontId2font(0));
QRectF rz = fm.tightBoundingRect(sz); // get 'tight' bounding boxes for strings
QRectF rn = fm.tightBoundingRect(sn);
// scale bounding boxes to mag
qreal spatium2 = _spatium * 2.0;
rz = QRectF(rz.x() * mag, -spatium2, rz.width() * mag, spatium2);
rn = QRectF(rn.x() * mag, -spatium2, rn.width() * mag, spatium2);
// position numerator and denominator; vertical displacement:
// number of lines is odd: 0.0 (strings are directly above and below the middle line)
// number of lines even: 0.5 (strings are moved up/down to leave 1 line dist. between them)
qreal displ = (numOfLines & 1) ? 0.0 : (0.5 * lineDist * _spatium);
// yoff -= _spatium*.08; //??
// lw = score()->styleS(ST_staffLineWidth).val() * _spatium;
pz = QPointF(0.0, yoff - displ);
// denom. horiz. posit.: centred around centre of numerator
// vert. position: base line is lowered by displ and by the whole height of a digit
pn = QPointF((rz.width() - rn.width())*.5, yoff + displ + spatium2);
setbbox(rz.translated(pz)); // translate bounding boxes to actual string positions
addbbox(rn.translated(pn));
}
qreal im = (MScore::DPI * SPATIUM20) / _spatium;
pz *= im; // convert positions to raster units
pn *= im;
// adjustReadPos();
}
//---------------------------------------------------------
// draw
//---------------------------------------------------------
void TimeSig::draw(QPainter* painter) const
{
if (staff() && !staff()->staffType()->genTimesig())
return;
painter->setPen(curColor());
QFont font = fontId2font(0);
font.setPixelSize(lrint(20.0 * MScore::DPI/PPI));
painter->setFont(font);
qreal mag = spatium() / (MScore::DPI * SPATIUM20);
qreal imag = 1.0 / mag;
painter->scale(mag, mag);
painter->drawText(pz, sz); // use positions and strings computed in layout()
painter->drawText(pn, sn);
painter->scale(imag, imag);
}
//---------------------------------------------------------
// space
//---------------------------------------------------------
Space TimeSig::space() const
{
return Space(point(score()->styleS(ST_timesigLeftMargin)), width());
}
//---------------------------------------------------------
// setFrom
//---------------------------------------------------------
void TimeSig::setFrom(const TimeSig* ts)
{
_subtype = ts->subtype();
sz = ts->sz;
sn = ts->sn;
_nominal = ts->_nominal;
_stretch = ts->_stretch;
customText = ts->customText;
}
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