vexflow
Version:
A JavaScript library for rendering music notation and guitar tablature
702 lines (507 loc) • 21.5 kB
HTML
<html>
<head>
<title>stavevolta.js</title>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<link rel="stylesheet" media="all" href="public/stylesheets/normalize.css" />
<link rel="stylesheet" media="all" href="docco.css" />
</head>
<body>
<div class="container">
<div class="page">
<div class="header">
<h1>stavevolta.js</h1>
<div class="toc">
<h3>Table of Contents</h3>
<ol>
<li>
<a class="source" href="accidental.html">
accidental.js
</a>
</li>
<li>
<a class="source" href="annotation.html">
annotation.js
</a>
</li>
<li>
<a class="source" href="articulation.html">
articulation.js
</a>
</li>
<li>
<a class="source" href="barnote.html">
barnote.js
</a>
</li>
<li>
<a class="source" href="beam.html">
beam.js
</a>
</li>
<li>
<a class="source" href="bend.html">
bend.js
</a>
</li>
<li>
<a class="source" href="boundingbox.html">
boundingbox.js
</a>
</li>
<li>
<a class="source" href="boundingboxcomputation.html">
boundingboxcomputation.js
</a>
</li>
<li>
<a class="source" href="canvascontext.html">
canvascontext.js
</a>
</li>
<li>
<a class="source" href="clef.html">
clef.js
</a>
</li>
<li>
<a class="source" href="clefnote.html">
clefnote.js
</a>
</li>
<li>
<a class="source" href="crescendo.html">
crescendo.js
</a>
</li>
<li>
<a class="source" href="curve.html">
curve.js
</a>
</li>
<li>
<a class="source" href="dot.html">
dot.js
</a>
</li>
<li>
<a class="source" href="easyscore.html">
easyscore.js
</a>
</li>
<li>
<a class="source" href="element.html">
element.js
</a>
</li>
<li>
<a class="source" href="factory.html">
factory.js
</a>
</li>
<li>
<a class="source" href="formatter.html">
formatter.js
</a>
</li>
<li>
<a class="source" href="fraction.html">
fraction.js
</a>
</li>
<li>
<a class="source" href="frethandfinger.html">
frethandfinger.js
</a>
</li>
<li>
<a class="source" href="ghostnote.html">
ghostnote.js
</a>
</li>
<li>
<a class="source" href="glyph.html">
glyph.js
</a>
</li>
<li>
<a class="source" href="glyphnote.html">
glyphnote.js
</a>
</li>
<li>
<a class="source" href="gracenote.html">
gracenote.js
</a>
</li>
<li>
<a class="source" href="gracenotegroup.html">
gracenotegroup.js
</a>
</li>
<li>
<a class="source" href="gracetabnote.html">
gracetabnote.js
</a>
</li>
<li>
<a class="source" href="index.html">
index.js
</a>
</li>
<li>
<a class="source" href="keymanager.html">
keymanager.js
</a>
</li>
<li>
<a class="source" href="keysignature.html">
keysignature.js
</a>
</li>
<li>
<a class="source" href="keysignote.html">
keysignote.js
</a>
</li>
<li>
<a class="source" href="modifier.html">
modifier.js
</a>
</li>
<li>
<a class="source" href="modifiercontext.html">
modifiercontext.js
</a>
</li>
<li>
<a class="source" href="multimeasurerest.html">
multimeasurerest.js
</a>
</li>
<li>
<a class="source" href="music.html">
music.js
</a>
</li>
<li>
<a class="source" href="note.html">
note.js
</a>
</li>
<li>
<a class="source" href="notehead.html">
notehead.js
</a>
</li>
<li>
<a class="source" href="notesubgroup.html">
notesubgroup.js
</a>
</li>
<li>
<a class="source" href="ornament.html">
ornament.js
</a>
</li>
<li>
<a class="source" href="parser.html">
parser.js
</a>
</li>
<li>
<a class="source" href="pedalmarking.html">
pedalmarking.js
</a>
</li>
<li>
<a class="source" href="raphaelcontext.html">
raphaelcontext.js
</a>
</li>
<li>
<a class="source" href="registry.html">
registry.js
</a>
</li>
<li>
<a class="source" href="renderer.html">
renderer.js
</a>
</li>
<li>
<a class="source" href="repeatnote.html">
repeatnote.js
</a>
</li>
<li>
<a class="source" href="smufl.html">
smufl.js
</a>
</li>
<li>
<a class="source" href="stave.html">
stave.js
</a>
</li>
<li>
<a class="source" href="stavebarline.html">
stavebarline.js
</a>
</li>
<li>
<a class="source" href="staveconnector.html">
staveconnector.js
</a>
</li>
<li>
<a class="source" href="stavehairpin.html">
stavehairpin.js
</a>
</li>
<li>
<a class="source" href="staveline.html">
staveline.js
</a>
</li>
<li>
<a class="source" href="stavemodifier.html">
stavemodifier.js
</a>
</li>
<li>
<a class="source" href="stavenote.html">
stavenote.js
</a>
</li>
<li>
<a class="source" href="staverepetition.html">
staverepetition.js
</a>
</li>
<li>
<a class="source" href="stavesection.html">
stavesection.js
</a>
</li>
<li>
<a class="source" href="stavetempo.html">
stavetempo.js
</a>
</li>
<li>
<a class="source" href="stavetext.html">
stavetext.js
</a>
</li>
<li>
<a class="source" href="stavetie.html">
stavetie.js
</a>
</li>
<li>
<a class="source" href="stavevolta.html">
stavevolta.js
</a>
</li>
<li>
<a class="source" href="stem.html">
stem.js
</a>
</li>
<li>
<a class="source" href="stemmablenote.html">
stemmablenote.js
</a>
</li>
<li>
<a class="source" href="stringnumber.html">
stringnumber.js
</a>
</li>
<li>
<a class="source" href="strokes.html">
strokes.js
</a>
</li>
<li>
<a class="source" href="svgcontext.html">
svgcontext.js
</a>
</li>
<li>
<a class="source" href="system.html">
system.js
</a>
</li>
<li>
<a class="source" href="tables.html">
tables.js
</a>
</li>
<li>
<a class="source" href="tabnote.html">
tabnote.js
</a>
</li>
<li>
<a class="source" href="tabslide.html">
tabslide.js
</a>
</li>
<li>
<a class="source" href="tabstave.html">
tabstave.js
</a>
</li>
<li>
<a class="source" href="tabtie.html">
tabtie.js
</a>
</li>
<li>
<a class="source" href="textbracket.html">
textbracket.js
</a>
</li>
<li>
<a class="source" href="textdynamics.html">
textdynamics.js
</a>
</li>
<li>
<a class="source" href="textnote.html">
textnote.js
</a>
</li>
<li>
<a class="source" href="tickable.html">
tickable.js
</a>
</li>
<li>
<a class="source" href="tickcontext.html">
tickcontext.js
</a>
</li>
<li>
<a class="source" href="timesignature.html">
timesignature.js
</a>
</li>
<li>
<a class="source" href="timesignote.html">
timesignote.js
</a>
</li>
<li>
<a class="source" href="tremolo.html">
tremolo.js
</a>
</li>
<li>
<a class="source" href="tuning.html">
tuning.js
</a>
</li>
<li>
<a class="source" href="tuplet.html">
tuplet.js
</a>
</li>
<li>
<a class="source" href="vex.html">
vex.js
</a>
</li>
<li>
<a class="source" href="vibrato.html">
vibrato.js
</a>
</li>
<li>
<a class="source" href="vibratobracket.html">
vibratobracket.js
</a>
</li>
<li>
<a class="source" href="voice.html">
voice.js
</a>
</li>
<li>
<a class="source" href="voicegroup.html">
voicegroup.js
</a>
</li>
</ol>
</div>
</div>
<p><a href="http://vexflow.com">VexFlow</a> - Copyright (c) Mohit Muthanna 2010.
Author Larry Kuhns 2011</p>
<div class='highlight'><pre>
<span class="hljs-keyword">import</span> { StaveModifier } <span class="hljs-keyword">from</span> <span class="hljs-string">'./stavemodifier'</span>;
<span class="hljs-keyword">export</span> <span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">Volta</span> <span class="hljs-keyword">extends</span> <span class="hljs-title">StaveModifier</span> </span>{
<span class="hljs-keyword">static</span> get CATEGORY() { <span class="hljs-keyword">return</span> <span class="hljs-string">'voltas'</span>; }
<span class="hljs-keyword">static</span> get type() {
<span class="hljs-keyword">return</span> {
<span class="hljs-attr">NONE</span>: <span class="hljs-number">1</span>,
<span class="hljs-attr">BEGIN</span>: <span class="hljs-number">2</span>,
<span class="hljs-attr">MID</span>: <span class="hljs-number">3</span>,
<span class="hljs-attr">END</span>: <span class="hljs-number">4</span>,
<span class="hljs-attr">BEGIN_END</span>: <span class="hljs-number">5</span>,
};
}
<span class="hljs-keyword">constructor</span>(type, number, x, y_shift) {
<span class="hljs-keyword">super</span>();
<span class="hljs-keyword">this</span>.setAttribute(<span class="hljs-string">'type'</span>, <span class="hljs-string">'Volta'</span>);
<span class="hljs-keyword">this</span>.volta = type;
<span class="hljs-keyword">this</span>.x = x;
<span class="hljs-keyword">this</span>.y_shift = y_shift;
<span class="hljs-keyword">this</span>.number = number;
<span class="hljs-keyword">this</span>.font = {
<span class="hljs-attr">family</span>: <span class="hljs-string">'sans-serif'</span>,
<span class="hljs-attr">size</span>: <span class="hljs-number">9</span>,
<span class="hljs-attr">weight</span>: <span class="hljs-string">'bold'</span>,
};
}
getCategory() { <span class="hljs-keyword">return</span> Volta.CATEGORY; }
setShiftY(y) { <span class="hljs-keyword">this</span>.y_shift = y; <span class="hljs-keyword">return</span> <span class="hljs-keyword">this</span>; }
draw(stave, x) {
<span class="hljs-keyword">const</span> ctx = stave.checkContext();
<span class="hljs-keyword">this</span>.setRendered();
<span class="hljs-keyword">let</span> width = stave.width;
<span class="hljs-keyword">const</span> top_y = stave.getYForTopText(stave.options.num_lines) + <span class="hljs-keyword">this</span>.y_shift;
<span class="hljs-keyword">const</span> vert_height = <span class="hljs-number">1.5</span> * stave.options.spacing_between_lines_px;
<span class="hljs-keyword">switch</span> (<span class="hljs-keyword">this</span>.volta) {
<span class="hljs-keyword">case</span> Volta.type.BEGIN:
ctx.fillRect(<span class="hljs-keyword">this</span>.x + x, top_y, <span class="hljs-number">1</span>, vert_height);
<span class="hljs-keyword">break</span>;
<span class="hljs-keyword">case</span> Volta.type.END:
width -= <span class="hljs-number">5</span>;
ctx.fillRect(<span class="hljs-keyword">this</span>.x + x + width, top_y, <span class="hljs-number">1</span>, vert_height);
<span class="hljs-keyword">break</span>;
<span class="hljs-keyword">case</span> Volta.type.BEGIN_END:
width -= <span class="hljs-number">3</span>;
ctx.fillRect(<span class="hljs-keyword">this</span>.x + x, top_y, <span class="hljs-number">1</span>, vert_height);
ctx.fillRect(<span class="hljs-keyword">this</span>.x + x + width, top_y, <span class="hljs-number">1</span>, vert_height);
<span class="hljs-keyword">break</span>;
<span class="hljs-keyword">default</span>:
<span class="hljs-keyword">break</span>;
}</pre></div>
<p>If the beginning of a volta, draw measure number</p>
<div class='highlight'><pre> <span class="hljs-keyword">if</span> (<span class="hljs-keyword">this</span>.volta === Volta.type.BEGIN || <span class="hljs-keyword">this</span>.volta === Volta.type.BEGIN_END) {
ctx.save();
ctx.setFont(<span class="hljs-keyword">this</span>.font.family, <span class="hljs-keyword">this</span>.font.size, <span class="hljs-keyword">this</span>.font.weight);
ctx.fillText(<span class="hljs-keyword">this</span>.number, <span class="hljs-keyword">this</span>.x + x + <span class="hljs-number">5</span>, top_y + <span class="hljs-number">15</span>);
ctx.restore();
}
ctx.fillRect(<span class="hljs-keyword">this</span>.x + x, top_y, width, <span class="hljs-number">1</span>);
<span class="hljs-keyword">return</span> <span class="hljs-keyword">this</span>;
}
}</pre></div>
<div class="fleur">h</div>
</div>
</div>
</body>
</html>