个人中心
gpt4 book ai didi

javascript - d3 : Tooltip placed on bottom of page instead of next to data

转载 作者：行者123 更新时间：2023-12-02 01:37:14 26 4
gpt4 key购买 nike

我是 d3 的新手，我一直在学习 www.d3-graph-gallery.com 的教程.这些教程对我来说效果很好，但是，当涉及到将鼠标悬停在数据上时显示工具提示时，事情就很奇怪了。 This tutorial展示了如何在热图上执行此操作。如您所见，它将工具提示创建为 div，然后将鼠标监听器添加到数据，使工具提示 div 出现在正确的位置。这在 d3-graph-gallery 网站上运行良好。

不幸的是，它既不能在我的本地浏览器上运行，也不能在 Jsfiddle 上运行: https://jsfiddle.net/vcfhnu4q/ 

<!DOCTYPE html>
<meta charset="utf-8">

<!-- Load d3.js -->
<script src="https://d3js.org/d3.v6.js"></script>

<!-- Create a div where the graph will take place -->
<div id="my_dataviz"></div>

<script>

// set the dimensions and margins of the graph
const margin = {top: 30, right: 30, bottom: 30, left: 30},
  width = 450 - margin.left - margin.right,
  height = 450 - margin.top - margin.bottom;

// append the svg object to the body of the page
const svg = d3.select("#my_dataviz")
.append("svg")
  .attr("width", width + margin.left + margin.right)
  .attr("height", height + margin.top + margin.bottom)
.append("g")
  .attr("transform", `translate(${margin.left},${margin.top})`);

// Labels of row and columns
const myGroups = ["A", "B", "C", "D", "E", "F", "G", "H", "I", "J"]
const myVars = ["v1", "v2", "v3", "v4", "v5", "v6", "v7", "v8", "v9", "v10"]

// Build X scales and axis:
const x = d3.scaleBand()
  .range([ 0, width ])
  .domain(myGroups)
  .padding(0.01);
svg.append("g")
  .attr("transform", `translate(0, ${height})`)
  .call(d3.axisBottom(x))

// Build X scales and axis:
const y = d3.scaleBand()
  .range([ height, 0 ])
  .domain(myVars)
  .padding(0.01);
svg.append("g")
  .call(d3.axisLeft(y));

// Build color scale
const myColor = d3.scaleLinear()
  .range(["white", "#69b3a2"])
  .domain([1,100])

//Read the data
d3.csv("https://raw.githubusercontent.com/holtzy/D3-graph-gallery/master/DATA/heatmap_data.csv").then( function(data) {

  // create a tooltip
  const tooltip = d3.select("#my_dataviz")
    .append("div")
    .style("opacity", 0)
    .attr("class", "tooltip")
    .style("background-color", "white")
    .style("border", "solid")
    .style("border-width", "2px")
    .style("border-radius", "5px")
    .style("padding", "5px")

  // Three function that change the tooltip when user hover / move / leave a cell
  const mouseover = function(event,d) {
    tooltip.style("opacity", 1)
  }
  const mousemove = function(event,d) {
    tooltip
      .html("The exact value of<br>this cell is: " + d.value)
      .style("left", (event.x)/2 + "px")
      .style("top", (event.y)/2 + "px")
  }
  const mouseleave = function(d) {
    tooltip.style("opacity", 0)
  }

  // add the squares
  svg.selectAll()
    .data(data, function(d) {return d.group+':'+d.variable;})
    .enter()
    .append("rect")
      .attr("x", function(d) { return x(d.group) })
      .attr("y", function(d) { return y(d.variable) })
      .attr("width", x.bandwidth() )
      .attr("height", y.bandwidth() )
      .style("fill", function(d) { return myColor(d.value)} )
    .on("mouseover", mouseover)
    .on("mousemove", mousemove)
    .on("mouseleave", mouseleave)
})
</script>

如果您查看 jsfiddle，您会看到工具提示位于页面底部，而不是鼠标悬停在单元格上时鼠标旁边，这对我来说很有意义，怎么可能绘制div 在 svg 之上？它们不是单独的容器吗？

如何让它发挥作用？

最佳答案

您的工具提示需要具有 position 样式。试试这个:

  // create a tooltip
  const tooltip = d3.select("#my_dataviz")
    .append("div")
    .style("opacity", 0)
    .attr("class", "tooltip")
    .style("background-color", "white")
    .style("border", "solid")
    .style("border-width", "2px")
    .style("border-radius", "5px")
    .style("padding", "5px")
    .style("position", "absolute")

<!DOCTYPE html>
<meta charset="utf-8">

<!-- Load d3.js -->
<script src="https://d3js.org/d3.v6.js"></script>

<!-- Create a div where the graph will take place -->
<div id="my_dataviz"></div>

<script>

// set the dimensions and margins of the graph
const margin = {top: 30, right: 30, bottom: 30, left: 30},
  width = 450 - margin.left - margin.right,
  height = 450 - margin.top - margin.bottom;

// append the svg object to the body of the page
const svg = d3.select("#my_dataviz")
.append("svg")
  .attr("width", width + margin.left + margin.right)
  .attr("height", height + margin.top + margin.bottom)
.append("g")
  .attr("transform", `translate(${margin.left},${margin.top})`);

// Labels of row and columns
const myGroups = ["A", "B", "C", "D", "E", "F", "G", "H", "I", "J"]
const myVars = ["v1", "v2", "v3", "v4", "v5", "v6", "v7", "v8", "v9", "v10"]

// Build X scales and axis:
const x = d3.scaleBand()
  .range([ 0, width ])
  .domain(myGroups)
  .padding(0.01);
svg.append("g")
  .attr("transform", `translate(0, ${height})`)
  .call(d3.axisBottom(x))

// Build X scales and axis:
const y = d3.scaleBand()
  .range([ height, 0 ])
  .domain(myVars)
  .padding(0.01);
svg.append("g")
  .call(d3.axisLeft(y));

// Build color scale
const myColor = d3.scaleLinear()
  .range(["white", "#69b3a2"])
  .domain([1,100])

//Read the data
d3.csv("https://raw.githubusercontent.com/holtzy/D3-graph-gallery/master/DATA/heatmap_data.csv").then( function(data) {

  // create a tooltip
  const tooltip = d3.select("#my_dataviz")
    .append("div")
    .style("opacity", 0)
    .attr("class", "tooltip")
    .style("background-color", "white")
    .style("border", "solid")
    .style("border-width", "2px")
    .style("border-radius", "5px")
    .style("padding", "5px")
    .style("position", "absolute")

  // Three function that change the tooltip when user hover / move / leave a cell
  const mouseover = function(event,d) {
    tooltip.style("opacity", 1)
  }
  const mousemove = function(event,d) {
    tooltip
      .html("The exact value of<br>this cell is: " + d.value)
      .style("left", (event.x)/2 + "px")
      .style("top", (event.y)/2 + "px")
  }
  const mouseleave = function(d) {
    tooltip.style("opacity", 0)
  }

  // add the squares
  svg.selectAll()
    .data(data, function(d) {return d.group+':'+d.variable;})
    .enter()
    .append("rect")
      .attr("x", function(d) { return x(d.group) })
      .attr("y", function(d) { return y(d.variable) })
      .attr("width", x.bandwidth() )
      .attr("height", y.bandwidth() )
      .style("fill", function(d) { return myColor(d.value)} )
    .on("mouseover", mouseover)
    .on("mousemove", mousemove)
    .on("mouseleave", mouseleave)
})
</script>

编辑: future 的建议 - 使用 Firefox Developer Edition。它有非常好的 CSS 样式检查工具，例如:

Screen shot showing the issue why left and right were not being applied to div

关于javascript - d3 : Tooltip placed on bottom of page instead of next to data，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/72165273/

26 4 0
文章推荐： r - 在 R 中模拟翻转炸薯条
文章推荐： r - 根据 R 中其他三个列的值创建新列
文章推荐： jquery - 如何在jQuery中检查粘贴剪贴板中字母输入的增加/减少
文章推荐： python - 如何使用 OrdinalEncoder() 设置自定义顺序？
行者123
个人简介

我是一名优秀的程序员,十分优秀！

滴滴打车优惠券免费领取
滴滴打车优惠券
Copyright 2021 - 2024 cfsdn All Rights Reserved 蜀ICP备2022000587号
广告合作:1813099741@qq.com 6ren.com