Question

我正在尝试创建一个多线图d3编辑器。代码是

＆＃13;

var margin = {
    top: 20,
    right: 80,
    bottom: 30,
    left: 50
  },
  width = 960 - margin.left - margin.right,
  height = 500 - margin.top - margin.bottom;

var parseDate = d3.time.format("%Y%m%d").parse;

var x = d3.time.scale()
  .range([0, width]);

var y = d3.scale.linear()
  .range([height, 0]);

var color = d3.scale.category10();

var xAxis = d3.svg.axis()
  .scale(x)
  .orient("bottom");

var yAxis = d3.svg.axis()
  .scale(y)
  .orient("left");

var line = d3.svg.line()
  //.interpolate("basis")
  .x(function(d) {
    return x(d.date);
  })
  .y(function(d) {
    return y(d.temperature);
  })
  .interpolate("monotone");

var dragged = null,
  selected = null;



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 + ")");

svg.append("rect")
  .attr("width", width)
  .attr("height", height)
  .attr("fill", "none");

dataurl = "https://gist.githubusercontent.com/ChrisJamesC/5896521/raw/83d7c5c04f7d031d3c71b4d6fd5b5193366d9fed/data.tsv";
count = 0;
var cities;
d3.tsv(dataurl, function(error, data) {
  console.log('count:', count++);
  color.domain(d3.keys(data[0]).filter(function(key) {
    return key !== "date";
  }));

  data.forEach(function(d) {
    d.date = parseDate(d.date);
  });

  cities = color.domain().map(function(name) {
    return {
      name: name,
      values: data.map(function(d) {
        return {
          date: d.date,
          temperature: +d[name]
        };
      })
    };
  });
  x.domain(d3.extent(data, function(d) {
    return d.date;
  }));

  console.log("cities", cities);

  y.domain([
    d3.min(cities, function(c) {
      return d3.min(c.values, function(v) {
        return v.temperature;
      });
    }),
    d3.max(cities, function(c) {
      return d3.max(c.values, function(v) {
        return v.temperature;
      });
    })
  ]);
  svg.append("g")
    .attr("class", "x axis")
    .attr("transform", "translate(0," + height + ")")
    .call(xAxis);

  svg.append("g")
    .attr("class", "y axis")
    .call(yAxis)
    .append("text")
    .attr("transform", "rotate(-90)")
    .attr("y", 6)
    .attr("dy", ".71em")
    .style("text-anchor", "end")
    .text("Temperature (ºF)");

  var city = svg.selectAll(".city")
    .data(cities)
    .enter().append("g")
    .attr("class", "city");

  city.append("path")
    .attr("class", "line")
    .attr("d", function(d) {
      return line(d.values);
    })
    .style("stroke", function(d) {
      return color(d.name);
    })
    .call(redraw);

  city.node().focus();
  console.log(city.node());

  function redraw() {
    city.select("path").attr("d", function(d) {
      return line(d.values);
    });

    var circle = city.append("g").selectAll("circle")
      .data(function(d) {
        return d.values
      })
      .enter();
    circle
      .append("circle")
      .attr("r", 2)
      .attr("cx", function(dd) {
        return x(dd.date)
      })
      .attr("cy", function(dd) {
        return y(dd.temperature)
      })
      .attr("fill", "none")
      .attr("stroke", function(d) {
        return color(this.parentNode.__data__.name)
      })
      .on("drag", function(d) {
        console.log('ondrag', d);
        selected = dragged = d;
        redraw();
      })
      .call(drag)
      .transition()
      .duration(750)
      .ease("elastic")
      .attr("r", 6.5);

    circle
      .classed("dragging", function(d) {
        console.log('draginng update', d, d === selected);
        return d === selected;
      })
      .attr("cx", function(d) {
        return x(d.x);
      })
      .attr("cy", function(d) {
        return y(d.y);
      });

    circle.exit().remove();

  };

  city.append("text")
    .datum(function(d) {
      return {
        name: d.name,
        value: d.values[d.values.length - 1]
      };
    })
    .attr("transform", function(d) {
      return "translate(" + x(d.value.date) + "," + y(d.value.temperature) + ")";
    })
    .attr("x", 3)
    .attr("dy", ".35em")
    .text(function(d) {
      return d.name;
    });

  var drag = d3.behavior.drag()
    .origin(function(d) {
      console.log('origin', d);
      return d;
    })
    .on("dragstart", dragstarted)
    .on("drag", dragged)
    .on("dragend", dragended);

  function dragstarted(d) {
    console.log('Drag started');
    d3.event.sourceEvent.stopPropagation();
    d3.event.sourceEvent.preventDefault();
    d3.select(this).classed("dragging", true);
  }

  function dragged(d) {
    selected = dragged = d3.mouse(city.node());
    d.x = x.invert(Math.min(width, dragged[0]));
    d.y = y.invert(Math.min(height, dragged[1]));
    console.log("node", d3.mouse(city.node()));
    console.log("d3.event", d3.event, d3.event.dx, d3.event.dy, d3.event.x, d3.event.y, d, d.x, d.y);
    redraw();
  }

  function dragended(d) {
    console.log('Drag started');
    d3.select(this).classed("dragging", false);
    dragged = null;
  }
});

＆＃13;

body {
  font: 10px sans-serif;
}
.axis path,
.axis line {
  fill: none;
  stroke: #000;
  shape-rendering: crispEdges;
}
.x.axis path {
  display: none;
}
.line {
  fill: none;
  stroke: steelblue;
  stroke-width: 1.5px;
}

＆＃13;

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

＆＃13;

类似于http://bl.ocks.org/mbostock/4342190，但对于多行。但是线条是正在渲染的圆形，但是通过选择圆形来编辑样条线是不起作用的。拖动功能和事件不会被触发。任何人都可以提供帮助。

D3js多线图编辑器无法正常工作

0 个答案: