using api

5 years ago · 303ad6b203
parent 671febc69c
commit 303ad6b203
2 changed files with 44 additions and 8 deletions
--- a/app.js
+++ b/app.js
@ -1,9 +1,45 @@
-const vf = new Vex.Flow.Factory({renderer: {elementId: 'main'}});
-const score = vf.EasyScore();
-const system = vf.System();
+const VF = Vex.Flow;

-system.addStave({
-    voices: [score.voice(score.notes('C#5/q, B4, A4, G#4'))]
-}).addClef('treble').addTimeSignature('4/4');
+// Create an SVG renderer and attach it to the DIV element named "boo".
+var div = document.querySelector("body")
+var renderer = new VF.Renderer(div, VF.Renderer.Backends.SVG);

-vf.draw();
+// Size our SVG:
+renderer.resize(500, 500);
+
+// And get a drawing context:
+var context = renderer.getContext();
+
+// Create a stave at position 10, 40 of width 400 on the canvas.
+var stave = new VF.Stave(10, 40, 400);
+
+// Add a clef and time signature.
+stave.addClef("treble").addTimeSignature("4/4");
+
+// Connect it to the rendering context and draw!
+stave.setContext(context).draw();
+
+var notes = [
+  // A quarter-note C.
+  new VF.StaveNote({clef: "treble", keys: ["c/4"], duration: "q" }),
+
+  // A quarter-note D.
+  new VF.StaveNote({clef: "treble", keys: ["d/4"], duration: "q" }),
+
+  // A quarter-note rest. Note that the key (b/4) specifies the vertical
+  // position of the rest.
+  new VF.StaveNote({clef: "treble", keys: ["b/4"], duration: "qr" }),
+
+  // A C-Major chord.
+  new VF.StaveNote({clef: "treble", keys: ["c/4", "e/4", "g/4"], duration: "q" })
+];
+
+// Create a voice in 4/4 and add the notes from above
+var voice = new VF.Voice({num_beats: 4,  beat_value: 4});
+voice.addTickables(notes);
+
+// Format and justify the notes to 400 pixels.
+var formatter = new VF.Formatter().joinVoices([voice]).format([voice], 400);
+
+// Render voice
+voice.draw(context, stave);
--- a/index.html
+++ b/index.html
@ -5,7 +5,7 @@
        <title></title>
        <script src="https://unpkg.com/vexflow/releases/vexflow-min.js" charset="utf-8"></script>
    </head>
-    <body id="main">
+    <body>
        <script src="app.js" charset="utf-8"></script>
    </body>
 </html>