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//=============================================================================
// MuseScore
// Music Composition & Notation
//
// Copyright (C) 2016 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 "stafflines.h"
#include "system.h"
#include "measure.h"
#include "score.h"
#include "stafftype.h"
#include "staff.h"
// Anatomy of StaffLines:
//
// step - The possible vertical positions of a note are counted as steps.
// The top staff line is step position zero.
// lines - number of visible staff lines
// lineDistance - The distance between lines, measured in step units. A standard five line
// staff has a line distance of two steps.
// stepDistance - The distance between steps measured in scaled spatium/2 units. A standard five
// line staff has a step distance of 0.5 which results in a line distance of
// one spatium. The spatium unit is scaled by staff size.
// yoffset - vertical offset to align with other staves of different height
// stepOffset - This value changes the staff line step numbering.
//
namespace Ms {
//---------------------------------------------------------
// StaffLines
//---------------------------------------------------------
StaffLines::StaffLines(Score* s)
: Element(s)
{
setSelectable(false);
}
//---------------------------------------------------------
// pagePos
//---------------------------------------------------------
QPointF StaffLines::pagePos() const
{
System* system = measure()->system();
return QPointF(measure()->x() + system->x(), system->staff(staffIdx())->y() + system->y());
}
//---------------------------------------------------------
// canvasPos
//---------------------------------------------------------
QPointF StaffLines::canvasPos() const
{
QPointF p(pagePos());
Element* e = parent();
while (e) {
if (e->type() == ElementType::PAGE) {
p += e->pos();
break;
}
e = e->parent();
}
return p;
}
//---------------------------------------------------------
// layout
//---------------------------------------------------------
void StaffLines::layout()
{
layoutForWidth(measure()->width());
}
//---------------------------------------------------------
// layoutForWidth
//---------------------------------------------------------
void StaffLines::layoutForWidth(qreal w)
{
const Staff* s = staff();
qreal _spatium = spatium();
qreal dist = _spatium;
setPos(QPointF(0.0, 0.0));
int _lines;
if (s) {
setMag(s->mag(measure()->tick()));
setColor(s->color());
const StaffType* st = s->staffType(measure()->tick());
dist *= st->lineDistance().val();
_lines = st->lines();
rypos() = st->yoffset().val() * _spatium;
// if (_lines == 1)
// rypos() = 2 * _spatium;
}
else {
_lines = 5;
setColor(MScore::defaultColor);
}
lw = score()->styleS(Sid::staffLineWidth).val() * _spatium;
qreal x1 = pos().x();
qreal x2 = x1 + w;
qreal y = pos().y();
bbox().setRect(x1, -lw * .5 + y, w, (_lines-1) * dist + lw);
if (_lines == 1) {
qreal extraSize = _spatium;
bbox().adjust(0, -extraSize, 0, extraSize);
}
lines.clear();
for (int i = 0; i < _lines; ++i) {
lines.push_back(QLineF(x1, y, x2, y));
y += dist;
}
}
//---------------------------------------------------------
// draw
//---------------------------------------------------------
void StaffLines::draw(QPainter* painter) const
{
painter->setPen(QPen(curColor(), lw, Qt::SolidLine, Qt::FlatCap));
painter->drawLines(lines);
}
//---------------------------------------------------------
// y1
//---------------------------------------------------------
qreal StaffLines::y1() const
{
System* system = measure()->system();
/* if (system == 0 || staffIdx() >= system->staves()->size())
return 0.0;
*/
return system->staff(staffIdx())->y() + ipos().y();
}
}
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