d3js - 在`path`上如何显示`path`值而不是显示`mouse`值？

时间：2016-02-17 12:43:00

标签： css d3.js

在我的图表中，我已将tooltip添加到路径中。但目前我只是用对象标签显示鼠标值。而不是显示鼠标值如何在该点显示确切的数组值（绘图值）？

任何人都可以帮助我吗？

＆＃13;
＆＃13; 
var datas = [
  {"date":1404075600000,"ActualPercentage" : 10, "PlanPercentage" : 5},
  {"date":1404680400000,"ActualPercentage" : 20, "PlanPercentage" : 15},
  {"date":1405285200000,"ActualPercentage" : 30, "PlanPercentage" : 25},
  {"date":1405890000000,"ActualPercentage" : 40, "PlanPercentage" : 35},
  {"date":1406494800000,"ActualPercentage" : 50, "PlanPercentage" : 45},
  {"date":1407099600000,"ActualPercentage" : 60, "PlanPercentage" : 55},
  {"date":1407704400000,"ActualPercentage" : 70, "PlanPercentage" : 65},
  {"date":1408309200000,"ActualPercentage" : 80, "PlanPercentage" : 85},
  {"date":1408914000000,"ActualPercentage" : 90, "PlanPercentage" : 90},
  {"date":1409518800000,"ActualPercentage" : 100, "PlanPercentage" :95}
]



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 toolTipScale = d3.scale.linear().domain([height + 80, 80]).range([0, 100]);
var iScale = d3.scale.linear().domain([width + 80, 80]).range([datas.length, 0]);

var color = d3.scale.ordinal()
      .domain(["ActualPercentage", "PlanPercentage"])
      .range(["#FF0000", "#009933"]);

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); }); 


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 div = d3.select("body").append("div")
			         .attr("class", "tooltips")
			         .style("opacity", 0);

  color.domain(d3.keys(datas[0]).filter(function(key) { return key !== "date"; }));

  datas.forEach(function(d) {
    
    var date = new Date(d.date);
    
  });

  var cities = color.domain().map(function(name) {
    return {
      name: name,
      values: datas.map(function(d) {
        return {date: d.date, temperature: +d[name]};
      })
    };
  });
  

  x.domain(d3.extent(datas, function(d) { return d.date; }));

  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");

  var path = city.append("path")
      .attr("class", "line")
      .style('cursor', 'pointer')
      .attr("d", function(d) { return line(d.values); })
      .style("stroke", function(d) { return color(d.name); });
      
  var totalLength = [path[0][0].getTotalLength()];
  
  path
      .attr("stroke-dasharray", totalLength + " " + totalLength)
      .attr("stroke-dashoffset", totalLength)
      .transition()
      .duration(2000)
      .ease("linear")
      .attr("stroke-dashoffset", 0);
      
 var circles = city.selectAll("circle")
        
					    .data(function(d) {
					      return d.values
					    })
					    .enter()
					    .append("circle")
					    .attr('class', 'circle')
					    .attr("r", 3.5)
					    .attr("cx", function(d, i) {
					      return x(d.date)
					    })
					    .attr("cy", function(d) {
					      return y(d.temperature)
					    })
					    .attr("fill", "transparent")
					    .attr("stroke", "black")
					    .attr("stroke-width", 0)
					    .transition()
					    .duration(3000)
					    .attr("stroke-width", 2);
					    
					    path.on("mouseover", function (d, i) {
						
						div.transition()
				            .duration(200)
				            .style("opacity", 0.9);

				        div.html(d.name +" : " +  Math.ceil(toolTipScale( d3.event.pageY)) )
				            .style("left", (d3.event.pageX) + "px")
				            .style("top", (d3.event.pageY - 28) + "px");

					})
					.on("mouseout", function (d, i) {
           				
           				div.transition()
				            .duration(500)
				            .style("opacity", 0);

					})
＆＃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;
}

body > div.tooltips {
	
	position: absolute;
	text-align: center;
	padding: 1em;
	font: 1.2em sans-serif;
	background: #02335D;
	border: 1px solid #fff;
	border-radius: 0.8em;
	pointer-events: none;
	color: #fff;
	white-space: no-wrap;
}
	
.overlay {
	fill: none;
	pointer-events: all;
}

.focus circle{
	fill: none;
	stroke: steelblue;

}
＆＃13; 
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.11/d3.min.js"></script>
＆＃13;
＆＃13;
＆＃13;

1 个答案:

答案 0 :(得分：2)

我不确定是否有可能在路径上的鼠标上准确显示值。但是，可以在鼠标悬停的圆圈上显示工具提示值。

希望这有用。

工作代码段： 

var datas = [{
  "date": 1404075600000,
  "ActualPercentage": 10,
  "PlanPercentage": 5
}, {
  "date": 1404680400000,
  "ActualPercentage": 20,
  "PlanPercentage": 15
}, {
  "date": 1405285200000,
  "ActualPercentage": 30,
  "PlanPercentage": 25
}, {
  "date": 1405890000000,
  "ActualPercentage": 40,
  "PlanPercentage": 35
}, {
  "date": 1406494800000,
  "ActualPercentage": 50,
  "PlanPercentage": 45
}, {
  "date": 1407099600000,
  "ActualPercentage": 60,
  "PlanPercentage": 55
}, {
  "date": 1407704400000,
  "ActualPercentage": 70,
  "PlanPercentage": 65
}, {
  "date": 1408309200000,
  "ActualPercentage": 80,
  "PlanPercentage": 85
}, {
  "date": 1408914000000,
  "ActualPercentage": 90,
  "PlanPercentage": 90
}, {
  "date": 1409518800000,
  "ActualPercentage": 100,
  "PlanPercentage": 95
}]



var margin = {
    top: 20,
    right: 150,
    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 toolTipScale = d3.scale.linear().domain([height + 80, 80]).range([0, 100]);
var iScale = d3.scale.linear().domain([width + 80, 80]).range([datas.length, 0]);

var color = d3.scale.ordinal()
  .domain(["ActualPercentage", "PlanPercentage"])
  .range(["#FF0000", "#009933"]);

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

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

var line = d3.svg.line() 
  .x(function(d) {
    return x(d.date);
  })
  .y(function(d) {
    return y(d.temperature);
  });


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 div = d3.select("body").append("div")
  .attr("class", "tooltips")
  .style("opacity", 0);

color.domain(d3.keys(datas[0]).filter(function(key) {
  return key !== "date";
}));

datas.forEach(function(d) {

  var date = new Date(d.date);

});

var cities = color.domain().map(function(name) {
  return {
    name: name,
    values: datas.map(function(d) {
      return {
        date: d.date,
        temperature: +d[name]
      };
    })
  };
});


x.domain(d3.extent(datas, function(d) {
  return d.date;
}));

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);

var city = svg.selectAll(".city")
  .data(cities)
  .enter().append("g")
  .attr('id', function(d) {
    return d.name;
  })
  .attr("class", "city");

var path = city.append("path")
  .attr("class", "line")
  .style('cursor', 'pointer')
  .attr("d", function(d) {
    return line(d.values);
  })
  .style("stroke", function(d) {
    return color(d.name);
  });

var totalLength = [path[0][0].getTotalLength()];

path
  .attr("stroke-dasharray", totalLength + " " + totalLength)
  .attr("stroke-dashoffset", totalLength)
  .transition()
  .duration(2000)
  .ease("linear")
  .attr("stroke-dashoffset", 0);

var circles = city.selectAll("circle")
  .data(function(d) {
    return d.values
  })
  .enter()
  .append("circle")
  .attr('class', 'circle')
  .attr("r", 3.5)
  .attr("cx", function(d, i) {
    return x(d.date)
  })
  .attr("cy", function(d) {
    return y(d.temperature)
  })
  .attr("fill", "transparent")
  .attr("stroke", "black")
  .attr("stroke-width", 0);

circles.transition()
  .duration(3000)
  .attr("stroke-width", 2);

circles.on("mouseover", function(d, i) {

    div.transition()
      .duration(200)
      .style("opacity", 0.9);
    var data = d3.select(this.parentNode).select("path").data()[0];
    div.html(data.name + " : " + d.temperature)
      .style("left", (d3.event.pageX) + "px")
      .style("top", (d3.event.pageY - 28) + "px");

  })
  .on("mouseout", function(d, i) {

    div.transition()
      .duration(500)
      .style("opacity", 0);

  });

var legend = svg.selectAll('.legend')
  .data(cities);

var legends = legend
  .enter()
  .append('g')
  .attr('class', 'legend')
  .attr('transform', function(d, i) {
    return "translate(" + (width+20) + "," + (i * 20) + ")";
  });

legends
  .append('circle')
  .attr('r', 7)
  .style('fill', function(d) {
    return color(d.name);
  });

legends
  .append('text')
  .attr("dx", 10)
  .attr("dy", 3.5)
  .text(function(d) {
    return d.name
  });

legends.on('click', function(d) {
  var path = d3.select("#" + d.name);
  var visibility = path.style("opacity");
  path.style("opacity", visibility == 1 ? 0 : 1)
});
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;
}
body > div.tooltips {
  position: absolute;
  text-align: center;
  padding: 1em;
  font: 1.2em sans-serif;
  background: #02335D;
  border: 1px solid #fff;
  border-radius: 0.8em;
  pointer-events: none;
  color: #fff;
  white-space: no-wrap;
}
.overlay {
  fill: none;
  pointer-events: all;
}
.focus circle {
  fill: none;
  stroke: steelblue;
}
.tick line{
  opacity: 0.2;
  stroke-dasharray: 5,5;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.11/d3.min.js"></script>

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