1

这使用 Raphaeljs 从数组中绘制单个和弦：

function createChordStruct(key, string, shape) {
  var string = string.toUpperCase();
  var position = positions[string][key];
  var struct = chord_shapes[shape];

return {
  name: key + struct.name,
  chord: struct.chord,
  position: position,
  position_text: struct.position_text,
  bars: struct.bars
  }
}

function createChordElement(chord_struct) {
  var chordbox = $('<div>').addClass('chord');
  var chordcanvas = $('<div>');
  var chordname = $('<div>').addClass('chordname');

chordbox.append(chordcanvas);
chordbox.append(chordname);
chordname.append(chord_struct.name);


var paper = Raphael(chordcanvas[0], 150, 140);
var chord = new ChordBox(paper, 30, 30);

chord.setChord(
  chord_struct.chord,
  chord_struct.position,
  chord_struct.bars,
  chord_struct.position_text);
chord.draw();

return chordbox;


}

function createSectionElement(section_struct) {
  var section = $('<div>').addClass('section');
  var section_title = $('<div>').addClass('title');
  var section_desc = $('<div>').addClass('description');

  section.append(section_title); 
  section.append(section_desc);
  section_title.append(section_struct.section);
  section_desc.append(section_struct.description);

  return section;

}

这需要从数组中创建的每个和弦，并将它们放入一个名为“chordscroller”的新 div 中：

function c_i() {


var randomholder = 'id_' + (Math.floor(Math.random() * 100005) + 1);
var randomId = 'id_' + (Math.floor(Math.random() * 100005) + 1);
$(function () {
  $('#sortable').append($('<li id ="' + randomholder + '" class="chordbox"><span id="i"       class="scale">C - I</span><span id="' + randomId + '" class=" even scrollpane chordscroller"></span></li>').sortable( "refresh" ))
  });


function c_one() {
  var container = $("#" + randomId + "");
  var column = null;
  var column = _.shuffle(c_1);


for (var i = 0; i < column.length; ++i) {
  var section_struct = column[i];
  var section = createSectionElement(section_struct);

  for (var j = 0; j < section_struct.chords.length; ++j)  {
    section.append(createChordElement(section_struct.chords[j]));

  }

container.append(section);
}


}



$(function() { c_one() });


}

问题是它同时画出所有的和弦，而且需要很长时间。我已经尝试了我能想到的所有 setTimeout 和 setInterval 组合，但我一直遇到错误。

任何人都可以从这段代码中看出如何一次绘制一个和弦而不是一次绘制所有和弦吗？

4

1 回答 1

0

Finally figured it out (using a plugin called doTimeout):

$.doTimeout( 1, function() {
  chord.setChord(
  chord_struct.chord,
  chord_struct.position,
  chord_struct.bars,
  chord_struct.position_text);
  chord.draw();


});
于 2012-09-06T11:28:07.277 回答