VocalEasel/Sources/VLLayout.cpp

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2007-12-23 12:45:17 +00:00
//
// File: VLLayout.cpp - Dimensions for lead sheet layout
//
// Author(s):
//
// (MN) Matthias Neeracher
//
// Copyright © 2007 Matthias Neeracher
//
#include "VLLayout.h"
#include "VLSheetViewInternal.h"
#include <algorithm>
#include <cstdlib>
#include <cmath>
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VLSystemLayout::VLSystemLayout(const VLProperties & prop, float width, int maxMeas)
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{
fDivisions = prop.fDivisions;
fNumGroups = prop.fTime.fNum / std::max(prop.fTime.fDenom / 4, 1);
fDivPerGroup = fDivisions * prop.fTime.fNum * 4 / (prop.fTime.fDenom * fNumGroups);
fClefKeyWidth = kClefX+kClefW+(std::labs(prop.fKey)+1)*kKeyW;
fMeasureWidth = fNumGroups*(fDivPerGroup+1)*kNoteW;
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fNumMeasures = std::min(maxMeas,
std::max<int>(1,
std::floor((width-fClefKeyWidth) / fMeasureWidth)));
}
static size_t NextBreak(const VLSong & song, size_t after=0)
{
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size_t propIdx = song.fMeasures[after].fPropIdx;
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while (++after < song.fMeasures.size())
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if (song.fMeasures[after].fBreak || song.fMeasures[after].fPropIdx != propIdx)
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return after;
return song.fMeasures.size();
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}
VLLayout::VLLayout(const VLSong & song, float width)
{
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size_t nextBreak = NextBreak(song);
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for (size_t meas = 0; meas<song.fMeasures.size(); ) {
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push_back(VLSystemLayout(song.Properties(meas), width, nextBreak-meas));
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meas += back().NumMeasures();
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if (meas >= nextBreak)
nextBreak = NextBreak(song, nextBreak);
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}
}
int VLLayout::FirstMeasure(int system) const
{
int meas = 0;
for (int sys=0; sys<system; ++sys)
meas += (*this)[sys].NumMeasures();
return meas;
}
int VLLayout::SystemForMeasure(int measure) const
{
int sys;
for (sys=0; sys<size(); ++sys) {
measure -= (*this)[sys].NumMeasures();
if (measure < 0)
break;
}
return sys;
}
float VLLayout::MeasurePosition(int measure) const
{
for (int sys=0; sys<size(); ++sys) {
const VLSystemLayout & layout = (*this)[sys];
if (measure < layout.NumMeasures())
return layout.MeasurePosition(measure);
measure -= layout.NumMeasures();
}
return 0.0f;
}
float VLLayout::NotePosition(int measure, VLFraction at) const
{
for (int sys=0; sys<size(); ++sys) {
const VLSystemLayout & layout = (*this)[sys];
if (measure < layout.NumMeasures()) {
int div = at.fNum*4*layout.Divisions() / at.fDenom;
return layout.MeasurePosition(measure)
+ (div + div/layout.DivPerGroup() + 1)*kNoteW;
}
measure -= layout.NumMeasures();
}
return 0.0f;
}
VLFontHandler::~VLFontHandler()
{
}
VLTextLayout::VLTextLayout(VLFontHandler * regular, VLFontHandler * narrow)
: fRegularFont(regular), fNarrowFont(narrow)
{
}
void VLTextLayout::AddSyllable(const VLSyllable & syll, float x)
{
VLLayoutSyll ls;
static_cast<VLSyllable &>(ls) = syll;
ls.fX = x;
fSyllables.push_back(ls);
}
typedef std::vector<VLLayoutSyll>::iterator VLSyllIter;
#define NARROW_SPACE "\xE2\x80\x89"
void VLTextLayout::DrawLine(float y)
{
VLSyllIter syll = fSyllables.begin();
VLSyllIter end = fSyllables.end();
while (syll != end) {
std::string text = syll->fText;
float x = syll->fX-0.5*fRegularFont->Width(text.c_str());
if (syll == fSyllables.begin() && syll->fKind & VLSyllable::kHasPrev)
text = "-" NARROW_SPACE + text;
if (syll->fKind & VLSyllable::kHasNext)
text += NARROW_SPACE "-";
fRegularFont->Draw(x, y, text.c_str());
++syll;
}
}