gpt4 book ai didi

javascript - 向折线图添加工具提示未显示

转载 作者:行者123 更新时间:2023-11-28 18:14:50 25 4
gpt4 key购买 nike

我制作了一个折线图,在节点上添加了项目符号。现在,我只想添加一些在悬停点时显示的工具提示。

文本似乎已添加,但我在悬停节点上看不到任何值(必须是频率)。

片段:

<html>

<head>

<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.4.12/angular.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js"></script>

</head>

<body ng-app="myApp" ng-controller="myCtrl">

<svg></svg>

<script>

//module declaration
var app = angular.module('myApp',[]);

//Controller declaration
app.controller('myCtrl',function($scope){

$scope.svgWidth = 800;//svg Width
$scope.svgHeight = 500;//svg Height

//Data in proper format
var data = [
{"letter": "A","frequency": "5.01"},
{"letter": "B","frequency": "7.80"},
{"letter": "C","frequency": "15.35"},
{"letter": "D","frequency": "22.70"},
{"letter": "E","frequency": "34.25"},
{"letter": "F","frequency": "10.21"},
{"letter": "G","frequency": "7.68"},
];

//removing prior svg elements ie clean up svg
d3.select('svg').selectAll("*").remove();

//resetting svg height and width in current svg
d3.select("svg").attr("width", $scope.svgWidth).attr("height", $scope.svgHeight);

//Setting up of our svg with proper calculations
var svg = d3.select("svg");
var margin = {top: 20, right: 20, bottom: 30, left: 40};
var width = svg.attr("width") - margin.left - margin.right;
var height = svg.attr("height") - margin.top - margin.bottom;

//Plotting our base area in svg in which chart will be shown
var g = svg.append("g").attr("transform", "translate(" + margin.left + "," + margin.top + ")");

//X and Y scaling
var x = d3.scaleBand().rangeRound([0, width]).padding(0.4);
var y = d3.scaleLinear().rangeRound([height, 0]);

x.domain(data.map(function(d) { return d.letter; }));
y.domain([0, d3.max(data, function(d) { return +d.frequency; })]);

//Final Plotting

//for x axis
g.append("g")
.call(d3.axisBottom(x))
.attr("transform", "translate(0," + height + ")");

//for y axis
g.append("g")
.call(d3.axisLeft(y))
.append("text").attr("transform", "rotate(-90)").attr("text-anchor", "end");

//the line function for path
var lineFunction = d3.line()
.x(function(d) {return x(d.letter); })
.y(function(d) { return y(d.frequency); })
.curve(d3.curveCardinal);

//defining the lines
var path = g.append("path");

//plotting lines
path
.attr("d", lineFunction(data))
.attr("stroke", "#fc9027")
.attr("stroke-width", 2)
.attr("fill", "none");

g.selectAll('.circles1')
.data(data)
.enter().append('circle')
.attr('cx', function(d) {
return x(d.letter);
})
.attr('cy', function(d) {
return y(d.frequency);
})
.attr('r', 6)
.style("fill", "#fc9027")
.on("mouseover", function(d,i) {
d3.select(this).append("text")
.text(d.frequency)
.attr("x", x(d.letter))
.attr("y", y(d.frequency))
});

});

</script>

</body>

</html>

结果:

enter image description here

最佳答案

当你这样做时:

d3.select(this).append("text")

您正在附加 <text>元素到 <circle>元素,这根本不起作用

还有其他选择。最简单的一个是附加 <title> :

 d3.select(this).append("title")

但是一个title是非常有限的。或者,您可以使用 div 来显示工具提示(在此处查看我的答案: https://stackoverflow.com/a/35665974/5768908 )

关于javascript - 向折线图添加工具提示未显示,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/40927814/

25 4 0
Copyright 2021 - 2024 cfsdn All Rights Reserved 蜀ICP备2022000587号
广告合作:1813099741@qq.com 6ren.com