多行D3.js折线图中的样式工具提示

Question

我使用带有工具提示的D3.js创建了一个多线图表。在这个图表中一切正常，但我想为图表中的所有图表添加样式到工具提示但不能这样做。

＆＃13;

＆＃13;

var margin = {
    top: 20,
    right: 30,
    bottom: 30,
    left: 40
  },
  width = 960 - margin.left - margin.right,
  height = 500 - margin.top - margin.bottom;

var z = d3.scale.category20c();

var svg = d3.select("body").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 + ")");

var parseDate = d3.time.format("%Y-%m-%dT%H:%M:%S.%LZ");

var data = [{
  data: [
    ["2016-01-20T05:31:17.000Z", 95.9, {}],
    ["2016-01-20T05:31:47.000Z", 95.9, {}],
    ["2016-01-20T05:32:17.000Z", 95.4, {}],
    ["2016-01-20T05:32:47.000Z", 96.1, {}],
    ["2016-01-20T05:33:17.000Z", 95.7, {}],
    ["2016-01-20T05:33:47.000Z", 95.9, {}],
    ["2016-01-20T05:34:17.000Z", 95.5, {}],
    ["2016-01-20T05:34:47.000Z", 95.9, {}],
    ["2016-01-20T05:35:17.000Z", 95.8, {}],
    ["2016-01-20T05:35:47.000Z", 95.9, {}],
    ["2016-01-20T05:36:17.000Z", 95.7, {}],
    ["2016-01-20T05:36:47.000Z", 95.7, {}],
    ["2016-01-20T05:37:17.000Z", 95.9, {}],
    ["2016-01-20T05:37:47.000Z", 95.5, {}],
    ["2016-01-20T05:38:17.000Z", 95.4, {}],
    ["2016-01-20T05:38:47.000Z", 95.8, {}],
    ["2016-01-20T05:39:17.000Z", 96.0, {}],
    ["2016-01-20T05:39:47.000Z", 96.1, {}],
    ["2016-01-20T05:40:17.000Z", 95.8, {}],
    ["2016-01-20T05:40:47.000Z", 96.0, {}],
    ["2016-01-20T05:41:17.000Z", 95.9, {}],
    ["2016-01-20T05:41:47.000Z", 94.9, {}],
    ["2016-01-20T05:42:17.000Z", 95.8, {}],
    ["2016-01-20T05:42:47.000Z", 95.9, {}],
    ["2016-01-20T05:43:17.000Z", 95.8, {}],
    ["2016-01-20T05:43:47.000Z", 96.0, {}],
    ["2016-01-20T05:44:17.000Z", 95.7, {}],
    ["2016-01-20T05:44:47.000Z", 96.0, {}],
    ["2016-01-20T05:45:17.000Z", 95.9, {}],
    ["2016-01-20T05:45:47.000Z", 96.0, {}],
    ["2016-01-20T05:46:17.000Z", 95.8, {}],
    ["2016-01-20T05:46:47.000Z", 96.0, {}],
    ["2016-01-20T05:47:17.000Z", 95.7, {}],
    ["2016-01-20T05:47:47.000Z", 96.2, {}],
    ["2016-01-20T05:48:17.000Z", 95.8, {}],
    ["2016-01-20T05:48:47.000Z", 95.9, {}],
    ["2016-01-20T05:49:17.000Z", 95.7, {}],
    ["2016-01-20T05:49:47.000Z", 95.9, {}],
    ["2016-01-20T05:50:18.000Z", 95.7, {}],
    ["2016-01-20T05:50:48.000Z", 95.8, {}],
    ["2016-01-20T05:51:18.000Z", 95.7, {}],
    ["2016-01-20T05:51:48.000Z", 95.9, {}],
    ["2016-01-20T05:52:18.000Z", 95.5, {}],
    ["2016-01-20T05:52:48.000Z", 95.9, {}],
    ["2016-01-20T05:53:18.000Z", 95.8, {}],
    ["2016-01-20T05:53:48.000Z", 95.9, {}],
    ["2016-01-20T05:54:18.000Z", 95.7, {}],
    ["2016-01-20T05:54:48.000Z", 95.9, {}],
    ["2016-01-20T05:55:18.000Z", 95.8, {}],
    ["2016-01-20T05:55:48.000Z", 95.8, {}],
    ["2016-01-20T05:56:18.000Z", 95.6, {}],
    ["2016-01-20T05:56:48.000Z", 95.7, {}],
    ["2016-01-20T05:57:18.000Z", 95.7, {}],
    ["2016-01-20T05:57:48.000Z", 95.8, {}],
    ["2016-01-20T05:58:18.000Z", 95.7, {}],
    ["2016-01-20T05:58:48.000Z", 95.7, {}],
    ["2016-01-20T05:59:18.000Z", 95.6, {}],
    ["2016-01-20T05:59:48.000Z", 95.8, {}],
    ["2016-01-20T06:00:18.000Z", 95.7, {}],
    ["2016-01-20T06:00:48.000Z", 95.7, {}],
    ["2016-01-20T06:01:18.000Z", 95.6, {}],
    ["2016-01-20T06:01:48.000Z", 95.7, {}],
    ["2016-01-20T06:02:18.000Z", 95.8, {}],
    ["2016-01-20T06:02:48.000Z", 95.8, {}],
    ["2016-01-20T06:03:18.000Z", 95.8, {}],
    ["2016-01-20T06:03:48.000Z", 95.8, {}],
    ["2016-01-20T06:04:18.000Z", 95.8, {}],
    ["2016-01-20T06:04:48.000Z", 95.8, {}],
    ["2016-01-20T06:05:18.000Z", 95.7, {}],
    ["2016-01-20T06:05:48.000Z", 95.7, {}]
  ],
  label: "a"
}, {
  data: [
    ["2016-01-20T05:31:17.000Z", 90.9, {}],
    ["2016-01-20T05:31:47.000Z", 91.9, {}],
    ["2016-01-20T05:32:17.000Z", 92.4, {}],
    ["2016-01-20T05:32:47.000Z", 90.1, {}],
    ["2016-01-20T05:33:17.000Z", 89.7, {}],
    ["2016-01-20T05:33:47.000Z", 91.9, {}],
    ["2016-01-20T05:34:17.000Z", 85.5, {}],
    ["2016-01-20T05:34:47.000Z", 93.9, {}],
    ["2016-01-20T05:35:17.000Z", 94.8, {}],
    ["2016-01-20T05:35:47.000Z", 93.9, {}],
    ["2016-01-20T05:36:17.000Z", 92.7, {}],
    ["2016-01-20T05:36:47.000Z", 95.7, {}],
    ["2016-01-20T05:37:17.000Z", 92.9, {}],
    ["2016-01-20T05:37:47.000Z", 93.5, {}],
    ["2016-01-20T05:38:17.000Z", 93.4, {}],
    ["2016-01-20T05:38:47.000Z", 93.8, {}],
    ["2016-01-20T05:39:17.000Z", 93.0, {}],
    ["2016-01-20T05:39:47.000Z", 93.1, {}],
    ["2016-01-20T05:40:17.000Z", 93.8, {}],
    ["2016-01-20T05:40:47.000Z", 93.0, {}],
    ["2016-01-20T05:41:17.000Z", 93.9, {}],
    ["2016-01-20T05:41:47.000Z", 93.9, {}],
    ["2016-01-20T05:42:17.000Z", 92.8, {}],
    ["2016-01-20T05:42:47.000Z", 92.9, {}],
    ["2016-01-20T05:43:17.000Z", 93.8, {}],
    ["2016-01-20T05:43:47.000Z", 93.0, {}],
    ["2016-01-20T05:44:17.000Z", 93.7, {}],
    ["2016-01-20T05:44:47.000Z", 93.0, {}],
    ["2016-01-20T05:45:17.000Z", 93.9, {}],
    ["2016-01-20T05:45:47.000Z", 93.0, {}],
    ["2016-01-20T05:46:17.000Z", 93.8, {}],
    ["2016-01-20T05:46:47.000Z", 96.0, {}],
    ["2016-01-20T05:47:17.000Z", 92.7, {}],
    ["2016-01-20T05:47:47.000Z", 92.2, {}],
    ["2016-01-20T05:48:17.000Z", 92.8, {}],
    ["2016-01-20T05:48:47.000Z", 92.9, {}],
    ["2016-01-20T05:49:17.000Z", 92.7, {}],
    ["2016-01-20T05:49:47.000Z", 92.9, {}],
    ["2016-01-20T05:50:18.000Z", 93.7, {}],
    ["2016-01-20T05:50:48.000Z", 93.8, {}],
    ["2016-01-20T05:51:18.000Z", 92.7, {}],
    ["2016-01-20T05:51:48.000Z", 92.9, {}],
    ["2016-01-20T05:52:18.000Z", 92.5, {}],
    ["2016-01-20T05:52:48.000Z", 94.9, {}],
    ["2016-01-20T05:53:18.000Z", 94.8, {}],
    ["2016-01-20T05:53:48.000Z", 94.9, {}],
    ["2016-01-20T05:54:18.000Z", 94.7, {}],
    ["2016-01-20T05:54:48.000Z", 94.9, {}],
    ["2016-01-20T05:55:18.000Z", 94.8, {}],
    ["2016-01-20T05:55:48.000Z", 93.8, {}],
    ["2016-01-20T05:56:18.000Z", 94.6, {}],
    ["2016-01-20T05:56:48.000Z", 94.7, {}],
    ["2016-01-20T05:57:18.000Z", 93.7, {}],
    ["2016-01-20T05:57:48.000Z", 93.8, {}],
    ["2016-01-20T05:58:18.000Z", 93.7, {}],
    ["2016-01-20T05:58:48.000Z", 93.7, {}],
    ["2016-01-20T05:59:18.000Z", 93.6, {}],
    ["2016-01-20T05:59:48.000Z", 93.8, {}],
    ["2016-01-20T06:00:18.000Z", 93.7, {}],
    ["2016-01-20T06:00:48.000Z", 93.7, {}],
    ["2016-01-20T06:01:18.000Z", 93.6, {}],
    ["2016-01-20T06:01:48.000Z", 94.7, {}],
    ["2016-01-20T06:02:18.000Z", 94.8, {}],
    ["2016-01-20T06:02:48.000Z", 94.8, {}],
    ["2016-01-20T06:03:18.000Z", 94.8, {}],
    ["2016-01-20T06:03:48.000Z", 94.8, {}],
    ["2016-01-20T06:04:18.000Z", 94.8, {}],
    ["2016-01-20T06:04:48.000Z", 94.8, {}],
    ["2016-01-20T06:05:18.000Z", 94.7, {}],
    ["2016-01-20T06:05:48.000Z", 94.7, {}]
  ],
  label: "b"
}]


var x = d3.time.scale()
  .range([0, width]);

var y = d3.scale.linear()
  .range([height, 0]);

var xAxis = d3.svg.axis()
  .scale(x)
  .orient("bottom");

var yAxis = d3.svg.axis()
  .scale(y)
  .orient("left");

var line = d3.svg.line()
  .interpolate("monotone")
  .x(function(d) {
    return x(parseDate.parse(d[0]));
  })
  .y(function(d) {
    return y(d[1]);
  });

var ary = [];
data.forEach(function(d) {
  ary.push(d.data);
});

x.domain(d3.extent(d3.merge(ary), function(d) {
  return parseDate.parse(d[0]);
}));

y.domain([
  d3.min(data, function(c) {
    return d3.min(c.data, function(v) {
      return v[1];
    });
  }),
  d3.max(data, function(c) {
    return d3.max(c.data, function(v) {
      return v[1];
    });
  })
]);

svg.append("g")
  .attr("class", "x axis")
  .attr("transform", "translate(0," + height + ")")
  .call(xAxis);

svg.append("g")
  .attr("class", "y axis")
  .call(yAxis);

var series = svg.selectAll(".series")
  .data(data)
  .enter().append("g")
  .attr("class", "series");

series.append("path")
  .attr("class", "line")
  .attr("d", function(d) {
    return line(d.data);
  })
  .style("stroke", function(d, i) {
    return z(i);
  });

series.append("text")
  .datum(function(d) {
    return {
      label: d.label,
      data: d.data[d.data.length - 1]
    };
  })
  .attr("transform", function(d) {
    return "translate(" + x(parseDate.parse(d.data[0])) + "," + y(d.data[1]) + ")";
  })
  .attr("x", 3)
  .attr("dy", ".35em");

var mouseG = svg.append("g")
  .attr("class", "mouse-over-effects");

mouseG.append("path") // this is the black vertical line to follow mouse
  .attr("class", "mouse-line")
  .style("stroke", "black")
  .style("stroke-width", "1px")
  .style("opacity", "0");

var lines = document.getElementsByClassName('line');

var mousePerLine = mouseG.selectAll('.mouse-per-line')
  .data(data)
  .enter()
  .append("g")
  .attr("class", "mouse-per-line");

mousePerLine.append("circle")
  .attr("r", 7)
  .style("stroke", function(d, i) {
    return z(i);
  })
  .style("fill", "none")
  .style("stroke-width", "1px")
  .style("opacity", "0");

mousePerLine.append("text")
  .attr("transform", "translate(10,3)");

mouseG.append('svg:rect') // append a rect to catch mouse movements on canvas
  .attr('width', width) // can't catch mouse events on a g element
  .attr('height', height)
  .attr('fill', 'none')
  .attr('pointer-events', 'all')
  .on('mouseout', function() { // on mouse out hide line, circles and text
    d3.select(".mouse-line")
      .style("opacity", "0");
    d3.selectAll(".mouse-per-line circle")
      .style("opacity", "0");
    d3.selectAll(".mouse-per-line text")
      .style("opacity", "0");
  })
  .on('mouseover', function() { // on mouse in show line, circles and text
    d3.select(".mouse-line")
      .style("opacity", "1");
    d3.selectAll(".mouse-per-line circle")
      .style("opacity", "1");
    d3.selectAll(".mouse-per-line text")
      .style("opacity", "1");
  })
  .on('mousemove', function() { // mouse moving over canvas
    var mouse = d3.mouse(this);
    d3.select(".mouse-line")
      .attr("d", function() {
        var d = "M" + mouse[0] + "," + height;
        d += " " + mouse[0] + "," + 0;
        return d;
      });

    d3.selectAll(".mouse-per-line")
      .attr("transform", function(d, i) {
        console.log(width / mouse[0])
        var xDate = x.invert(mouse[0]),
          bisect = d3.bisector(function(d) {
            return d[0];
          }).right;
        var idx = bisect(d.data, xDate);

        var beginning = 0,
          end = lines[i].getTotalLength(),
          target = null;

        while (true) {
          target = Math.floor((beginning + end) / 2);
          var pos = lines[i].getPointAtLength(target);
          if ((target === end || target === beginning) && pos.x !== mouse[0]) {
            break;
          }
          if (pos.x > mouse[0]) end = target;
          else if (pos.x < mouse[0]) beginning = target;
          else break; //position found
        }

        d3.select(this).select('text')
          .text(y.invert(pos.y).toFixed(2));

        return "translate(" + mouse[0] + "," + pos.y + ")";
      });
  });

＆＃13;

text.inner-circle {
  font-weight: 400;
  font-size: 12px;
  text-transform: uppercase;
}

text.inner-text {
  font-weight: 400;
  font-size: 36px;
  font-family: 'Metric Regular', 'Metric';
  text-align: center;
  font-style: normal;
  text-transform: uppercase;
}

path {
  stroke: steelblue;
  stroke-width: 2;
  fill: none;
}

.axis path,
.axis line {
  fill: none;
  stroke: grey;
  stroke-width: 2;
  shape-rendering: crispEdges;
}

.grid .tick {
  stroke: lightgrey;
  stroke-opacity: 0.7;
  shape-rendering: crispEdges;
}

.grid path {
  stroke-width: 0;
}

＆＃13;

<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.11/d3.min.js"></script>

＆＃13;

＆＃13;

＆＃13;

我想在每个图表行的顶部添加一个带有x和y值的小白框。请帮帮我。

JSFIDDLE

Answer 1

你可以这样做：

首先制作一个id为x-text的文本，y-text将其附加到组中，如下所示（因为你想显示 x和y值）。

mousePerLine.append("text").attr("id", "x-text")
  .attr("transform", "translate(10,3)");
mousePerLine.append("text").attr("id", "y-text")
  .attr("transform", "translate(10,23)");

接下来，您可以在鼠标移动中显示上面创建的文本中的值，如下所示：

 //for y text on tooltip 
 d3.select(this).select('#y-text')
  .text("y: " + y.invert(pos.y).toFixed(2));
//make date in the format %H:%M:%S for x tooltip
d3.select(this).select('#x-text')
  .text("x: " + d3.time.format("%X")(xDate));

接下来在工具提示周围创建一个矩形用于样式化：

mousePerLine.append("rect")
    .attr("x", 0)
    .attr("y", -10)
  .attr("width", 70)//width of rectangle
    .attr("height", 35)//height of rectangle
  .style("stroke", function(d, i) {
    return z(i);
  })
  .attr("class", "tooltip-container")//add class for styling rectangle
  .style("fill", "red")//give color red to it.
    .style("opacity", "0")
  .style("stroke-width", "1px");

工作代码here