Word云在d3.v4中显示不正确
Word云在d3.v4中显示不正确
提问于 2022-05-19 15:27:34
我正在试用这个动画单词云的示例，使用jasondavies d3.layout.cloud。
它适用于d3版本3，但如果您用上面的任何版本更新它，它将无法正确显示。您仍然可以看到一些词的转换，但其他的仍然处于中间，没有缩放。
我把这里的代码作为参考。
<!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:我从示例中编辑了填充颜色为黑色。如果要在d3 v4或更高版本中使用原始调色板，则需要使用var fill = d3.scaleOrdinal(d3.schemeCategory10)。
回答 1
Stack Overflow用户
回答已采纳
发布于 2022-05-23 21:11:24
好的，我做了一些调查，他们基本上将enter和update函数合并为一个使用merge的函数，从v4版本开始。
因此，要使上面的工作有效，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);使用
//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);页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/72307245
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