d3.v4 无法正确显示词云

Question

我正在尝试这个 example of an animated word cloud, using jasondavies's d3.layout.cloud。

它适用于 d3 版本 3，但如果您将其更新为以上任何版本，它将无法正确显示。您仍然可以看到一些单词的过渡，但其他单词仍然在中间，没有缩放。

我把代码放在这里作为参考。

<!DOCTYPE html>
<meta charset="utf-8">
<body>
  <!--script src="http://d3js.org/d3.v3.min.js"></script-->
    <script src="https://d3js.org/d3.v4.js"></script>
  <script src="https://rawgit.com/jasondavies/d3-cloud/master/build/d3.layout.cloud.js"></script>
  <script>

//Simple animated example of d3-cloud - https://github.com/jasondavies/d3-cloud
//Based on https://github.com/jasondavies/d3-cloud/blob/master/examples/simple.html

// Encapsulate the word cloud functionality
function wordCloud(selector) {

    //var fill = d3.scale.category20();

    //Construct the word cloud's SVG element
    var svg = d3.select(selector).append("svg")
        .attr("width", 500)
        .attr("height", 500)
        .append("g")
        .attr("transform", "translate(250,250)");


    //Draw the word cloud
    function draw(words) {
        var cloud = svg.selectAll("g text")
                        .data(words, function(d) { return d.text; })

        //Entering words
        cloud.enter()
            .append("text")
            .style("font-family", "Impact")
            .style("fill", "black")
            .attr("text-anchor", "middle")
            .attr('font-size', 1)
            .text(function(d) { return d.text; });

        //Entering and existing words
        cloud
            .transition()
                .duration(600)
                .style("font-size", function(d) { return d.size + "px"; })
                .attr("transform", function(d) {
                    return "translate(" + [d.x, d.y] + ")rotate(" + d.rotate + ")";
                })
                .style("fill-opacity", 1);

        //Exiting words
        cloud.exit()
            .transition()
                .duration(200)
                .style('fill-opacity', 1e-6)
                .attr('font-size', 1)
                .remove();
    }


    //Use the module pattern to encapsulate the visualisation code. We'll
    // expose only the parts that need to be public.
    return {

        //Recompute the word cloud for a new set of words. This method will
        // asycnhronously call draw when the layout has been computed.
        //The outside world will need to call this function, so make it part
        // of the wordCloud return value.
        update: function(words) {
            d3.layout.cloud().size([500, 500])
                .words(words)
                .padding(5)
                .rotate(function() { return ~~(Math.random() * 2) * 90; })
                .font("Impact")
                .fontSize(function(d) { return d.size; })
                .on("end", draw)
                .start();
        }
    }

}

//Some sample data - http://en.wikiquote.org/wiki/Opening_lines
var words = [
    "You don't know about me without you have read a book called The Adventures of Tom Sawyer but that ain't no matter.",
    "The boy with fair hair lowered himself down the last few feet of rock and began to pick his way toward the lagoon.",
    "When Mr. Bilbo Baggins of Bag End announced that he would shortly be celebrating his eleventy-first birthday with a party of special magnificence, there was much talk and excitement in Hobbiton.",
    "It was inevitable: the scent of bitter almonds always reminded him of the fate of unrequited love."
]

//Prepare one of the sample sentences by removing punctuation,
// creating an array of words and computing a random size attribute.
function getWords(i) {
    return words[i]
            .replace(/[!\.,:;\?]/g, '')
            .split(' ')
            .map(function(d) {
                return {text: d, size: 10 + Math.random() * 60};
            })
}

//This method tells the word cloud to redraw with a new set of words.
//In reality the new words would probably come from a server request,
// user input or some other source.
function showNewWords(vis, i) {
    i = i || 0;

    vis.update(getWords(i ++ % words.length))
    setTimeout(function() { showNewWords(vis, i + 1)}, 2000)
}

//Create a new instance of the word cloud visualisation.
var myWordCloud = wordCloud('body');

//Start cycling through the demo data
showNewWords(myWordCloud);


</script>

注意：我将示例中的填充颜色编辑为黑色。如果要使用d3 v4或以上的原始调色板，需要使用var fill = d3.scaleOrdinal(d3.schemeCategory10)

Answer 1

好的，所以我做了一些挖掘，他们基本上使用 merge 从版本 v4 开始将输入和更新功能合并为一个。

所以要使上述工作正常，您必须替换

//Entering words
        cloud.enter()
            .append("text")
            .style("font-family", "Impact")
            .style("fill", "black")
            .attr("text-anchor", "middle")
            .attr('font-size', 1)
            .text(function(d) { return d.text; });

        //Entering and existing words
        cloud
            .transition()
                .duration(600)
                .style("font-size", function(d) { return d.size + "px"; })
                .attr("transform", function(d) {
                    return "translate(" + [d.x, d.y] + ")rotate(" + d.rotate + ")";
                })
                .style("fill-opacity", 1);

与

//Entering words
        cloud.enter()
            .append("text")
            .style("font-family", "Impact")
            .style("fill", "black")
            .attr("text-anchor", "middle")
            .attr('font-size', 1)
            .text(function(d) { return d.text; })
            //Entering and existing
            .merge(cloud).transition()
                .duration(600)
                .style("font-size", function(d) { return d.size + "px"; })
                .attr("transform", function(d) {
                    return "translate(" + [d.x, d.y] + ")rotate(" + d.rotate + ")";
                })
                .style("fill-opacity", 1);

d3.v4 无法正确显示词云

Word cloud not displaying correctly with d3.v4

javascript

word-cloud

d3.js