lex
/
h5-colexiu


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <script src="./opensheetmusicdisplay.min.js"></script>
  <style>
    * {
      margin: 0;
      padding: 0;
    }

    body {
      padding-bottom: 60px;
      height: 600px;
      overflow: hidden;
    }

    .vf-text {
      display: none;
    }
  </style>
</head>

<body>
  <div id="osmdContainer" />
  <script>
    var osmd = new opensheetmusicdisplay.OpenSheetMusicDisplay("osmdContainer");
    osmd.setOptions({
      backend: "svg",
      drawTitle: false,
      drawPartNames: true,
      drawLyricist: false,
      drawComposer: false
      // drawingParameters: "compacttight" // don't display title, composer etc., smaller margins
    });
    function getSvgPngToSize(osmd) {
      if (osmd) {
        const imgList = ''
        if (osmd.Drawer.Backends.length > 0) {
          var backend = osmd.Drawer.Backends[0]
          var state = backend.ctx.state;
          var width = backend.ctx.width / state.scale.x;
          var height = backend.ctx.height / state.scale.y;
          var cont = new XMLSerializer().serializeToString(
            backend.ctx.svg
          )
          return {
            img: cont,
            width: width,
            height: height
          }
        }
      } else {
        console.log('没有OSMD')
      }
    }
    function render() {
      osmd.render();
      window.parent.postMessage({
        api: 'musicStaffRender',
        loading: false,
        osmdImg: getSvgPngToSize(osmd)
      }, '*');
    }

    function renderXml(xmlUrl, partIndex) {
      osmd
        .load(xmlUrl)
        .then(
          function () {
            for (let i = 0; i < osmd.Sheet.Instruments.length; i++) {
              // console.log(osmd.Sheet.Instruments[i].Name);
              osmd.Sheet.Instruments[i].Visible = i === partIndex;
            }
            osmd.zoom = .5
            render();
          }
        );
    }
    function resetRender(partIndex) {
      for (let i = 0; i < osmd.Sheet.Instruments.length; i++) {
        // console.log(osmd.Sheet.Instruments[i].Name);
        osmd.Sheet.Instruments[i].Visible = i === partIndex;
      }
      render();

    }
  </script>
</body>

</html>