我有一个 d3 折线图，当我将鼠标悬停在显示下面 json 对象中的 topNewFeature 数据点的行时，我将其与工具提示放在一起。除了该工具提示之外，我还想迭代功能变量，并在鼠标悬停在图表旁边的框中列出所有功能描述。这是我的数据结构:
data = [{
date : 2015-01-01,
topNewFeature : XYZ,
sigFeatures : 12,
cumCPA : 43,
features : [
{coeff : 0.3345, featureDescription : ABC},
{coeff : 0.7232, featureDescription : XYZ},
...
]
},
...
]
我的 json 文件太大，无法上传到 stack Overflow 提供的 jsfiddle、myjson 或 html/css/javascript 编辑器，因此我制作了一个小 Flask 应用程序来提供它:JSON DATA
以下是相关的js、html和css文件:
var margin = {
top: 30,
right: 200,
bottom: 30,
left: 50
},
width = 960 - margin.left - margin.right,
height = 470 - margin.top - margin.bottom;
var parseDate = d3.time.format("%d-%b-%y").parse;
var formatDate = d3.time.format("%e %B"); // ********
var bisectDate = d3.bisector(function(d) {
return d.date;
}).left;
// Set chart ranges
var x = d3.time.scale().range([0, width]);
var y0 = d3.scale.linear().range([height, 0]);
var y1 = d3.scale.linear().range([height, 0]);
// Define X-Axis
var xAxis = d3.svg.axis().scale(x)
.orient("bottom").ticks(5);
// Define Left Y-Axis
var yAxisLeft = d3.svg.axis().scale(y0)
.orient("left").ticks(5)
.tickFormat(d3.format("$"));
// Define Right Y-Axis
var yAxisRight = d3.svg.axis().scale(y1)
.orient("right").ticks(5);
// Define cumulative CPA line
var valueline = d3.svg.line()
.x(function(d) {
return x(d.date);
})
.y(function(d) {
return y0(d.cumCPA);
});
// Define significant features line
var valueline2 = d3.svg.line()
.x(function(d) {
return x(d.date);
})
.y(function(d) {
return y1(d.sigFeatures);
});
// Define the div for the tooltip
var tooldiv = d3.select("body").append("div")
.attr("class", "tooltip")
.style("opacity", "0")
.style("display", "none");
// Add svg canvas
var svg = d3.select("#chart")
.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 + ")");
// Add tooltip line & focus element
var lineSvg = svg.append("g");
// Get the data
d3.json("princess_cruise.json", function(error, data) {
data.forEach(function(d) {
d.date = parseDate(d.date);
d.sigFeatures = +d.sigFeatures;
d.cumCPA = +d.cumCPA;
d.features = d.features;
d.topNewFeature = d.topNewFeature;
});
// Scale the range of the data
x.domain(d3.extent(data, function(d) {
return d.date;
}));
y0.domain([0, d3.max(data, function(d) {
return Math.max(d.cumCPA);
})]);
y1.domain([0, d3.max(data, function(d) {
return Math.max(d.sigFeatures);
})]);
// Add cumulative CPA path
svg.append("path")
.style("stroke", "#158BD5")
.attr("d", valueline(data));
// Add significant features path
svg.append("path")
.style("stroke", "#00B151")
.attr("d", valueline2(data));
// Add the X Axis (date)
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
// Add Y axis (cumulative CPA)
svg.append("g")
.attr("class", "y axis")
.style("fill", "#158BD5")
.call(yAxisLeft);
// Add Y axis (significant features)
svg.append("g")
.attr("class", "y axis")
.attr("transform", "translate(" + width + " ,0)")
.style("fill", "#00B151")
.call(yAxisRight);
// START TOOLTIP INTEGRATION
var focus = svg.append("g")
.style("display", "none");
// append the x line
focus.append("line")
.attr("class", "x")
.style("stroke", "#555555")
.style("stroke-dasharray", "3,3")
.style("opacity", 0.5)
.attr("y1", 0)
.attr("y2", height);
// append the y line
focus.append("line")
.attr("class", "y")
.style("stroke", "#555555")
.style("stroke-dasharray", "3,3")
.style("opacity", 0.5)
.attr("x1", width)
.attr("x2", width / 2);
// append the circle at the intersection
// place the significant features at the intersection
var tooltip = focus.append("g")
.data(data)
.attr("class","toolbox");
tooltip.append("rect")
.style("fill", "#fff")
.style("stroke", "#eee")
.style("stroke-width", 2)
.style("opacity", 1)
.attr("width", 200)
.attr("height", 35);
tooltip.append("rect")
.style("fill", "#eee")
.style("opacity",0.8)
.attr("width", 200)
.attr("height", 15);
tooltip.append("text")
.attr("dx", 8)
.attr("dy", 12)
.text("Top New Feature:");
tooltip.append("text")
.attr("class","featText")
.attr("dx", 8)
.attr("dy", 30);
tooltip.append("circle")
.attr("class", "y")
.style("fill", "#fff")
.style("stroke", "#00B151")
.style("stroke-width", 2)
.attr("r", 6);
// append the rectangle to capture mouse
svg.append("rect")
.attr("width", width)
.attr("height", height)
.style("fill", "none")
.style("pointer-events", "all")
.on("mouseover", function(d) {
focus.style("display", null);
})
.on("mouseout", function(d) {
focus.style("display", "none");
})
.on("mousemove", mousemove);
function mousemove() {
var x0 = x.invert(d3.mouse(this)[0]),
i = bisectDate(data, x0, 1),
d0 = data[i - 1],
d1 = data[i],
d = x0 - d0.date > d1.date - x0 ? d1 : d0;
focus.select(".toolbox")
.attr("transform",
"translate(" + x(d.date) + "," +
y1(d.sigFeatures) + ")");
focus.select(".featText")
.text(d.topNewFeature);
focus.select(".x")
.attr("transform",
"translate(" + x(d.date) + "," +
y1(d.sigFeatures) + ")")
.attr("y2", height - y1(d.sigFeatures));
focus.select(".y")
.attr("transform",
"translate(" + width * -1 + "," +
y1(d.sigFeatures) + ")")
.attr("x2", width + width)
.attr("x1", x(d.date) - (width * -1));
}
}); body { font: 12px Arial;}
path {
stroke: steelblue;
stroke-width: 2;
fill: none;
}
.axis path,
.axis line {
fill: none;
stroke: grey;
stroke-width: 1;
shape-rendering: crispEdges;
}
div.tooltip {
position: absolute;
text-align: left;
font: 12px sans-serif;
padding-top: 2px;
padding-bottom: 2px;
padding-right: 6px;
padding-left: 6px;
background: white;
border: 1px;
border-style: solid;
pointer-events: none;
}
<!DOCTYPE html>
<html>
<head>
<title></title>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://d3js.org/d3.v3.min.js" charset="utf-8"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
</head>
<body>
<div class="container-fluid">
<div class="row">
<div class="col-md-8">
<div id="chart"></div>
</div>
<div class="col-md-4">
<h5>Features for day being hovered over</h5>
<div id="showdata"></div>
</div>
</div>
</div>
<script src="/js/chart.js" type="text/javascript"></script>
</body>
</html>最佳答案
您可以在鼠标悬停功能中执行类似的操作:
//remove all the old selection this can me moved to mouse out as well
d3.select("#showdata").selectAll("*").remove();
//here we will append feature description to the div showdata
d.features.forEach(function(m){
d3.select("#showdata")
.append("div")
.text(m.featureDescription)
})
工作代码here
希望这有帮助!
关于javascript - 鼠标悬停时在 d3 图表旁边的框中显示变量的所有数据，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/34296826/