VexFlow 複数小節にわたる長い休符

VexFlow 使い方に戻る。

概要

　複数小節休符(multimeasure rest)はVexFlowでは描画する術は提供されていません。なので、この記事を作る必要はないのですが、じゃあどうやって実現するの？っていうのもあるとおもうので、最低限のアンサーを示そうとする管理人の粋なはからいにより存在する記事です。

　そうです。このVexFlowの記事をずっと読んでくれている人にはわかると思います。例の奥の手を発動する感じです。うまくできるかは見守っていただければと思います。時間かかるだろうな。この記事がいろいろ変化している間は格闘中だと思って下さい。

　9小節目の位置を取得する処理を追加します。SVGにテキストを挿入してるだけだから無駄に選択できる機能がいらないですね。コピーしたところで同じフォントでなければ文字化けするだけです。意味ない。かといってテキストをパスに変換して塗りつぶすというひと手間はものすごく難易度があがります。そこは追及し出したら泥沼にはまりますので、そっとしておきましょう。綺麗にみれたらそれでいいやん。でしょ。

　

複数小節休符

　コードは以下のとおりです。

<div id="yonet202403Mid_Output01"></div>
<script>
///////////////////////
(function(){
class Position {
  constructor(x, y) {
    this.x = x;
    this.y = y;
  }
}
var VF = Vex.Flow;
const Instrument1 = new Position(0, 0);
const Instrument2 = new Position(0, 0);
const Stave9Pos = new Position(0, 0);
(function(){
const {
  Factory,
  Stave,
  StaveNote,
  Formatter,
  Voice,
  StaveTie,
  BarLine,
  Beam,
  Dot,
  StaveConnector,
  Modifier,
  RenderContext,
  TextDynamics,
  Articulation,
  TextNote,
  Crescendo,
  Renderer
} = Vex.Flow;

let nscale = 0.64;
let nwidth = 1040;
let nheight = 720;

let nHeadMargin = 70;
let nStaveWidth = 350;

const f = new Factory({ 
  renderer: { elementId: 'yonet202403Mid_Output01', width: nwidth, height: nheight * nscale }
  });
const ctx = f.getContext();
ctx.scale(nscale, nscale);

const defaultStyle = {
  lineWidth: ctx.lineWidth,
  strokeStyle: ctx.strokeStyle,
};



for (let i = 0; i <= nwidth * (1 / nscale); i += 10) {
  ctx.beginPath();
  ctx.moveTo(0 + i, 0);
  ctx.lineTo(0 + i, nheight);
  if (i % 100 === 0){
    ctx.setLineWidth(1);
    ctx.setStrokeStyle('rgba(200, 200, 200, 0.8)');
  }
  else{
    ctx.setLineWidth(0.5);
    ctx.setStrokeStyle('rgba(230, 230, 230, 0.8)');
  }
  ctx.stroke();
}

for (let i = 0; i <= nheight; i += 10) {
  ctx.beginPath();
  ctx.moveTo(0, i);
  ctx.lineTo(nwidth * (1 / nscale), i);
  if (i % 100 === 0){
    ctx.setLineWidth(1);
    ctx.setStrokeStyle('rgba(200, 200, 200, 0.8)');
  }
  else{
    ctx.setLineWidth(0.5);
    ctx.setStrokeStyle('rgba(230, 230, 230, 0.8)');
  }
  ctx.stroke();
}

ctx.lineWidth = defaultStyle.lineWidth;
ctx.strokeStyle = defaultStyle.strokeStyle;

const stave1 = new Stave(80, 150, nHeadMargin + nStaveWidth).setContext(ctx);
stave1.setClef("treble").setContext(ctx);
stave1.setTimeSignature('4/4').setContext(ctx);
stave1.setMeasure(1);
stave1.draw();

Instrument1.x = stave1.x - 30;
Instrument1.y = stave1.y + 90; 

const gracenotes1 = [
  new VF.GraceNote({ keys: ['b/4'], duration: '8', slash: true })
];

const notes1 = [
  new StaveNote({ keys: ["c/4", "e/4", "g/4"], duration: "4" }),
  new StaveNote({ keys: ["d/4", "f/4", "a/4"], duration: "4" }),
  new StaveNote({ keys: ["e/4", "g/4", "b/4"], duration: "4" }),
  new StaveNote({ keys: ["f/4", "a/4", "c/5"], duration: "4" })
];

notes1[0].addModifier(new VF.Accidental({type:'#'}), 0);
notes1[0].addModifier(new VF.GraceNoteGroup({notes: gracenotes1, slur: true}), 0);//Vex.Flow.Modifier.Position.LEFT

var stave1Voice = new Vex.Flow.Voice({ num_beats: 4, beat_value: 4 });
stave1Voice.setStrict(false);
stave1Voice.addTickables(notes1);

var formatter1 = new Vex.Flow.Formatter().joinVoices([stave1Voice]);
formatter1.formatToStave([stave1Voice], stave1);
stave1Voice.draw(ctx, stave1);

const stave2 = f.Stave({ x: stave1.width + stave1.x, y: stave1.y, width: nStaveWidth });
stave2.setMeasure(2);
stave2.setContext(ctx).draw();

const gracenotes2 = [{ keys: ['d/4'], duration: '8', slash: false }].map(f.GraceNote.bind(f));

const notes2 = [
        f.StaveNote({ keys: ['c/4'], duration: '4', auto_stem: true }),
        f.StaveNote({ keys: ["d/4"], duration: "4" }),
        f.StaveNote({ keys: ["e/4"], duration: "4" }),
        f.StaveNote({ keys: ["f/4"], duration: "4" })
];
notes2[0].addModifier(f.GraceNoteGroup({ notes: gracenotes2, slur: true }), 0);
const stave2Voice = f.Voice({ num_beats: 4, beat_value: 4 }).setStrict(false).addTickables(notes2);
var formatter2 = new VF.Formatter().joinVoices([stave2Voice]);
formatter2.formatToStave([stave2Voice], stave2);
f.draw();


const stave3 = new Stave(stave2.width + stave2.x, stave1.y, nStaveWidth).setContext(ctx);
stave3.setMeasure(3);
stave3.draw();


const stave4 = new Stave(stave3.width + stave3.x, stave1.y, nStaveWidth).setContext(ctx);
stave4.setMeasure(4);
stave4.draw();

const notes4 = [
  new StaveNote({ keys: ["c/4", "e/4", "g/4", "b/4"], duration: "4" }),
  new StaveNote({ keys: ["d/4", "f/4", "a/4", "c/5"], duration: "4" }),
  new StaveNote({ keys: ["e/4", "g/4", "b/4", "d/5"], duration: "4" }),
  new StaveNote({ keys: ["f/4", "a/4", "c/5", "e/5"], duration: "4" })
];

var stave4Voice = new Vex.Flow.Voice({ num_beats: 4, beat_value: 4 });
stave4Voice.addTickables(notes4);

var formatter4 = new Vex.Flow.Formatter().joinVoices([stave4Voice]);
formatter4.format([stave4Voice], nStaveWidth);

stave4Voice.draw(ctx, stave4);

const stave5 = new Stave(stave1.x, stave1.y + 200, nHeadMargin + nStaveWidth).setContext(ctx);
stave5.addClef("treble").setContext(ctx);
stave5.addTimeSignature('4/4').setContext(ctx);
stave5.addKeySignature('E').setContext(ctx);
stave5.setMeasure(5);
stave5.draw();

var connector = new VF.StaveConnector(stave1, stave5);
connector.setType(VF.StaveConnector.type.SINGLE);
connector.setContext(ctx);
connector.draw();

const gracenotes5 = [
  new VF.GraceNote({ keys: ['f/5'], duration: '16', slash: false }),
  new VF.GraceNote({ keys: ['g/5'], duration: '16', slash: false }),
  new VF.GraceNote({ keys: ['b/5'], duration: '16', slash: false }),
];

const notes5 = [
  new StaveNote({ keys: ["g/5"], duration: "4", stem_direction: -1 }),
  new StaveNote({ keys: ["b/5"], duration: "4", stem_direction: -1 }),
  new StaveNote({ keys: ["c/6"], duration: "2", stem_direction: -1 })
];

notes5[2].addModifier(new VF.GraceNoteGroup(gracenotes5, true).beamNotes(), 0);

var stave5Voice = new Vex.Flow.Voice({ num_beats: 4, beat_value: 4 });
stave5Voice.setStrict(false);
stave5Voice.addTickables(notes5);

var formatter5 = new Vex.Flow.Formatter().joinVoices([stave5Voice]);
formatter5.format([stave5Voice], nStaveWidth);

stave5Voice.draw(ctx, stave5);

function dotted(staveNote, noteIndex = -1) {
  if (noteIndex < 0) {
    Dot.buildAndAttach([staveNote], {
      all: true
    });
  } 
  else {
    for(noteIndexValue of noteIndex){
      Dot.buildAndAttach([staveNote], {
        index: noteIndexValue
      });
    }
  }
  return staveNote;
}

const stave6 = new Stave(stave5.width + stave5.x, stave5.y, nStaveWidth).setContext(ctx);
stave6.setMeasure(6);
stave6.draw();

const notes6 = [
  new StaveNote({ keys: ["g/5"], duration: "4", stem_direction: -1  }),
  new StaveNote({ keys: ["b/5"], duration: "4", stem_direction: -1  }),
  dotted(new StaveNote({ keys: ["f/5"], duration: "4d", stem_direction: -1  })),
  new StaveNote({ keys: ["e/5"], duration: "16", stem_direction: -1  }),
  new StaveNote({ keys: ["f/5"], duration: "16", stem_direction: -1  })
];
//const notes6beam = notes6[3].concat(notes6[4]);
const beam6 = new VF.Beam([notes6[3],notes6[4]]);

var stave6Voice = new Vex.Flow.Voice({ num_beats: 4, beat_value: 4 });
stave6Voice.addTickables(notes6);

var formatter6 = new Vex.Flow.Formatter().joinVoices([stave6Voice]);
formatter6.format([stave6Voice], nStaveWidth);

stave6Voice.draw(ctx, stave6);
beam6.setContext(ctx).draw();

const stave7 = new Stave(stave6.width + stave6.x, stave5.y, nStaveWidth).setContext(ctx);
stave7.setMeasure(7);
stave7.draw();

const gracenotes7 = [
  new VF.GraceNote({ keys: ['e/6'], duration: '16', slash: false }),
  new VF.GraceNote({ keys: ['f/6'], duration: '16', slash: false })
];

const notes7 = [
  new StaveNote({ keys: ["g/5"], duration: "4", stem_direction: -1 }),
  new StaveNote({ keys: ["b/5"], duration: "4", stem_direction: -1 }),
  new StaveNote({ keys: ["g/6"], duration: "2", stem_direction: -1 })
];

notes7[2].addModifier(new VF.GraceNoteGroup(gracenotes7, true).beamNotes(), 0);

var stave7Voice = new Vex.Flow.Voice({ num_beats: 4, beat_value: 4 });
stave7Voice.setStrict(false);
stave7Voice.addTickables(notes7);

var formatter7 = new Vex.Flow.Formatter().joinVoices([stave7Voice]);
formatter7.format([stave7Voice], nStaveWidth);

stave7Voice.draw(ctx, stave7);

const stave8 = new Stave(stave7.width + stave7.x, stave5.y, nStaveWidth).setContext(ctx);
stave8.setMeasure(8);
stave8.draw();

const notes8 = [
  new StaveNote({ keys: ["g/6"], duration: "8", stem_direction: -1  }),
  new StaveNote({ keys: ["g/6"], duration: "8", stem_direction: -1  }),
  new StaveNote({ keys: ["f/6"], duration: "8", stem_direction: -1  }),
  new StaveNote({ keys: ["e/6"], duration: "8", stem_direction: -1  }),
  new StaveNote({ keys: ["e/6"], duration: "2", stem_direction: -1  })
];

const beam8_1 = new VF.Beam([notes8[0],notes8[1]]);
const beam8_2 = new VF.Beam([notes8[2],notes8[3]]);

var stave8Voice = new Vex.Flow.Voice({ num_beats: 4, beat_value: 4 });
stave8Voice.addTickables(notes8);

var formatter8 = new Vex.Flow.Formatter().joinVoices([stave8Voice]);
formatter8.format([stave8Voice], nStaveWidth);

stave8Voice.draw(ctx, stave8);
beam8_1.setContext(ctx).draw();
beam8_2.setContext(ctx).draw();

const stave9 = new Stave(stave5.x, stave5.y + 200, nHeadMargin + nStaveWidth).setContext(ctx);
stave9.setMeasure(9);
stave9.draw();

var connector9 = new VF.StaveConnector(stave5, stave9);
connector9.setType(VF.StaveConnector.type.SINGLE);
connector9.setContext(ctx);
connector9.draw();

var connector9_2 = new VF.StaveConnector(stave5, stave9);
connector9_2.setType(VF.StaveConnector.type.BRACKET);
connector9_2.setContext(ctx);
connector9_2.draw();

Instrument2.x = stave1.x - 30;
Instrument2.y = stave5.y + ((stave9.y - stave5.y) / 2) + 90; 

Stave9Pos.x = stave9.x;
Stave9Pos.y = stave9.y;

const stave10 = new Stave(stave9.width + stave9.x, stave9.y, nStaveWidth).setContext(ctx);
stave10.setMeasure(10);
stave10.draw();


const stave11 = new Stave(stave10.width + stave10.x, stave9.y, nStaveWidth).setContext(ctx);
stave11.setMeasure(11);
stave11.draw();


const stave12 = new Stave(stave11.width + stave11.x, stave9.y, nStaveWidth).setContext(ctx);
stave12.setMeasure(12);
stave12.draw();

})();

const svgElement2 = document.querySelector('#yonet202403Mid_Output01 svg');
svgElement2.style.backgroundColor = '#F5F5F5';
var svgContainer = document.getElementById('yonet202403Mid_Output01');
var svgElement = svgContainer.querySelector('svg');

var newText = document.createElementNS('http://www.w3.org/2000/svg', 'text');
newText.setAttribute('x', '100');
newText.setAttribute('y', '100');
newText.setAttribute('font-family', 'Hiragino Kaku Gothic Pro, メイリオ, MS Gothic, sans-serif');
newText.setAttribute('font-size', '50');
newText.setAttribute('fill', 'black');
newText.textContent = 'TestTitle - subTitle - lyrics: yo-net, music: yo-net';
svgElement.appendChild(newText);

var newText2 = document.createElementNS('http://www.w3.org/2000/svg', 'text');
newText2.setAttribute('x', Instrument1.x);
newText2.setAttribute('y', Instrument1.y);
newText2.setAttribute('font-family', 'Bravura, VexFlow, Arial, sans-serif');
newText2.setAttribute('font-size', '20pt');
newText2.setAttribute('fill', 'black');
newText2.textContent = 'Vocal';
var textGroup2 = document.createElementNS('http://www.w3.org/2000/svg', 'g');
textGroup2.setAttribute('transform', 'rotate(-90 ' + Instrument1.x + ' ' + Instrument1.y + ')');
textGroup2.appendChild(newText2);
svgElement.appendChild(textGroup2);

var newText3 = document.createElementNS('http://www.w3.org/2000/svg', 'text');
newText3.setAttribute('x', Instrument2.x);
newText3.setAttribute('y', Instrument2.y);
newText3.setAttribute('font-family', 'Bravura, VexFlow, Arial, sans-serif');
newText3.setAttribute('font-size', '20pt');
newText3.setAttribute('fill', 'black');
newText3.textContent = 'E.Guitar';
var textGroup3 = document.createElementNS('http://www.w3.org/2000/svg', 'g');
textGroup3.setAttribute('transform', 'rotate(-90 ' + Instrument2.x + ' ' + Instrument2.y + ')');
textGroup3.appendChild(newText3);
svgElement.appendChild(textGroup3);

//フォント設定
var fontSize9 = 40; // フォントサイズ
var fontFamily9 = "Bravura, Arial"; // Bravuraフォントファミリー
var textContent9 = "\uE4EF\uE4F0\uE4F0\uE4F0\uE4F0\uE4F0\uE4F0\uE4F0\uE4F0\uE4F0\uE4F0\uE4F0\uE4F0\uE4F0\uE4F1";//複数小節休符 E4EFが始まり、E4F0が途中、E4F1が終了記号// 符頭はE0A4

// テキスト要素の作成
var newText9 = document.createElementNS('http://www.w3.org/2000/svg', 'text');
newText9.setAttribute('id', 'rest9'); // テキスト要素にIDを付ける
newText9.setAttribute('x', 0);
newText9.setAttribute('y', 0);
newText9.setAttribute('font-family', fontFamily9);
newText9.setAttribute('font-size', fontSize9);
newText9.setAttribute('fill', 'black');
newText9.textContent = textContent9;

// SVG要素にテキストを追加
svgElement.appendChild(newText9);

(function(){
    var textWidth = document.getElementById('rest9').getBBox().width;
    var textHeight = document.getElementById('rest9').getBBox().height;

    //スケーリング
    var horizontalScale = 1;
    var verticalScale = 1;

    var StavePos_x = Stave9Pos.x + 120;
    var StavePos_y = Stave9Pos.y + 60;

    newText9.setAttribute('transform', 'translate(' + StavePos_x  + ',' + StavePos_y + ') scale(' + horizontalScale + ',' + verticalScale + ')');

    //SVG要素に追加する
    svgElement.appendChild(newText9);
})();


// 複数小節休符番号記号のフォント設定
var fontSize9_1 = 40; // フォントサイズ
var fontFamily9_1 = "Bravura, Arial"; // Bravuraフォントファミリー
var textContent9_1 = "\uE081\uE089";//複数小節休符番号 // 符頭E0A4

// テキスト要素の作成
var newText9_1 = document.createElementNS('http://www.w3.org/2000/svg', 'text');
newText9_1.setAttribute('id', 'rest9_1'); // テキスト要素にIDを付ける
newText9_1.setAttribute('x', 0);
newText9_1.setAttribute('y', 0);
newText9_1.setAttribute('font-family', fontFamily9_1);
newText9_1.setAttribute('font-size', fontSize9_1);
newText9_1.setAttribute('fill', 'black');
newText9_1.textContent = textContent9_1;

// SVG要素にテキストを追加
svgElement.appendChild(newText9_1);

(function(){
    var textWidth = document.getElementById('rest9_1').getBBox().width;
    var textHeight = document.getElementById('rest9_1').getBBox().height;

    // スケーリング
    var horizontalScale = 1;
    var verticalScale = 1;

    var StavePos_x = Stave9Pos.x + 205;
    var StavePos_y = Stave9Pos.y + 40;

    newText9_1.setAttribute('transform', 'translate(' + StavePos_x  + ',' + StavePos_y + ') scale(' + horizontalScale + ',' + verticalScale + ')');

    // SVG要素に追加する
    svgElement.appendChild(newText9_1);
})();


})();
</script>

　VexFlowの技術とは関係のない記事になってしまいましたが、またひとつ奥の手の使い方を示せましたね。

　

VexFlow 使い方に戻る。