我正在使用 d3 词云 ( https://github.com/jasondavies/d3-cloud )。它工作得很好,但每次单击按钮时我都需要更新单词。在我发现的代码中,在另一个函数的返回中声明了一个“更新”函数,如下面的代码末尾所示:
function wordCloud(selector) {
//lookForWords();
var fill = d3.scale.category20();
//Construct the word cloud's SVG element
$(selector).html("");
var svg = d3.select(selector).append("svg")
.attr("width", 1000)
.attr("height", 800)
.append("g")
.attr("transform", "translate(250,250)");
$("svg").css('position','absolute');
$("svg").css('top','250px');
$("svg").css('left','500px');
$("svg").css('overflow','visible');
//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", function(d, i) { return fill(i); })
.attr("text-anchor", "middle")
.attr('font-size', 1)
.text(function(d) { return d.text; });
//Entering and existing words
cloud
.transition()
.duration(3500)
.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(3500)
.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([1000, 1000])
.words(words)
.padding(1)
.rotate(function() { return ~~(Math.random() * 2) * 90; })
.font("Impact")
.fontSize(function(d) { return d.size; })
.on("end", draw)
.start();
}
}
}
我在网上找不到相关信息。我如何从“外部世界”调用这个函数?
最佳答案
wordCloud(selector)
返回一个包含 update
方法的对象。
所以,这应该有效:
var wordCloud = wordCloud("#myDiv");
wordCloud.update(myWords);
关于javascript - Javascript 中的 d3 词云 - 无法使用更新功能,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/46069120/