vexflow
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A JavaScript library for rendering music notation and guitar tablature
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<title>ghostnote.js</title>
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<h1>ghostnote.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.</p>
<h2 id="description">Description</h2>
<div class='highlight'><pre>
<span class="hljs-keyword">import</span> { Vex } <span class="hljs-keyword">from</span> <span class="hljs-string">'./vex'</span>;
<span class="hljs-keyword">import</span> { StemmableNote } <span class="hljs-keyword">from</span> <span class="hljs-string">'./stemmablenote'</span>;
<span class="hljs-keyword">export</span> <span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">GhostNote</span> <span class="hljs-keyword">extends</span> <span class="hljs-title">StemmableNote</span> </span>{
<span class="hljs-comment">/** @constructor */</span>
<span class="hljs-keyword">constructor</span>(parameter) {</pre></div>
<p>Sanity check</p>
<div class='highlight'><pre> <span class="hljs-keyword">if</span> (!parameter) {
<span class="hljs-keyword">throw</span> <span class="hljs-keyword">new</span> Vex.RuntimeError(<span class="hljs-string">'BadArguments'</span>,
<span class="hljs-string">'Ghost note must have valid initialization data to identify '</span> +
<span class="hljs-string">'duration.'</span>);
}
<span class="hljs-keyword">let</span> note_struct;</pre></div>
<p>Preserve backwards-compatibility</p>
<div class='highlight'><pre> <span class="hljs-keyword">if</span> (<span class="hljs-keyword">typeof</span> (parameter) === <span class="hljs-string">'string'</span>) {
note_struct = { <span class="hljs-attr">duration</span>: parameter };
} <span class="hljs-keyword">else</span> <span class="hljs-keyword">if</span> (<span class="hljs-keyword">typeof</span> (parameter) === <span class="hljs-string">'object'</span>) {
note_struct = parameter;
} <span class="hljs-keyword">else</span> {
<span class="hljs-keyword">throw</span> <span class="hljs-keyword">new</span> Vex.RuntimeError(<span class="hljs-string">'BadArguments'</span>,
<span class="hljs-string">'Ghost note must have valid initialization data to identify '</span> +
<span class="hljs-string">'duration.'</span>);
}
<span class="hljs-keyword">super</span>(note_struct);
<span class="hljs-keyword">this</span>.setAttribute(<span class="hljs-string">'type'</span>, <span class="hljs-string">'GhostNote'</span>);</pre></div>
<p>Note properties</p>
<div class='highlight'><pre> <span class="hljs-keyword">this</span>.setWidth(<span class="hljs-number">0</span>);
}
isRest() { <span class="hljs-keyword">return</span> <span class="hljs-literal">true</span>; }
setStave(stave) {
<span class="hljs-keyword">super</span>.setStave(stave);
}
addToModifierContext() { <span class="hljs-comment">/* intentionally overridden */</span> <span class="hljs-keyword">return</span> <span class="hljs-keyword">this</span>; }
preFormat() {
<span class="hljs-keyword">this</span>.setPreFormatted(<span class="hljs-literal">true</span>);
<span class="hljs-keyword">return</span> <span class="hljs-keyword">this</span>;
}
draw() {
<span class="hljs-keyword">if</span> (!<span class="hljs-keyword">this</span>.stave) <span class="hljs-keyword">throw</span> <span class="hljs-keyword">new</span> Vex.RERR(<span class="hljs-string">'NoStave'</span>, <span class="hljs-string">"Can't draw without a stave."</span>);</pre></div>
<p>Draw the modifiers</p>
<div class='highlight'><pre> <span class="hljs-keyword">this</span>.setRendered();
<span class="hljs-keyword">for</span> (<span class="hljs-keyword">let</span> i = <span class="hljs-number">0</span>; i < <span class="hljs-keyword">this</span>.modifiers.length; ++i) {
<span class="hljs-keyword">const</span> modifier = <span class="hljs-keyword">this</span>.modifiers[i];
modifier.setContext(<span class="hljs-keyword">this</span>.context);
modifier.drawWithStyle();
}
}
}</pre></div>
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