Question

在下面的程序中，我制作了一个折线图，但工具提示不起作用。它给出了一个错误。 Pl帮我展示工具提示！

SNIPPET：

<html>

<head>

    <script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.4.12/angular.min.js"></script> 
    <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script> 
    <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js"></script>

    <style>

    /* d3 tip */ 
    .d3-tip {
      line-height: 1;  font-weight: bold;  padding: 12px;  background: rgba(0, 0, 0, 0.8);  color: #fff;  border-radius: 2px;}

    /* Creates a small triangle extender for the tooltip */
    .d3-tip:after {box-sizing: border-box;  display: inline;  font-size: 10px;  width: 100%;  line-height: 1;  color: rgba(0, 0, 0, 0.8);  content: "\25BC";  position: absolute;  text-align: center;}

    /* Style northward tooltips differently */
    .d3-tip.n:after {margin: -1px 0 0 0;  top: 100%;  left: 0;}

    </style> 


</head> 

<body ng-app="myApp" ng-controller="myCtrl"> 

    <svg></svg>

    <script>

        //module declaration 
        var app = angular.module('myApp',[]);

        //Controller declaration
        app.controller('myCtrl',function($scope){

            $scope.svgWidth = 800;//svg Width
            $scope.svgHeight = 500;//svg Height 

            //Data in proper format 
            var data = [
                  {"letter": "A","frequency": "5.01"},
                  {"letter": "B","frequency": "7.80"},
                  {"letter": "C","frequency": "15.35"},
                  {"letter": "D","frequency": "22.70"},
                  {"letter": "E","frequency": "34.25"},
                  {"letter": "F","frequency": "10.21"},
                  {"letter": "G","frequency": "7.68"},
            ];

                //removing prior svg elements ie clean up svg 
                d3.select('svg').selectAll("*").remove();

                //resetting svg height and width in current svg 
                d3.select("svg").attr("width", $scope.svgWidth).attr("height", $scope.svgHeight);

                //Setting up of our svg with proper calculations 
                var svg = d3.select("svg");
                var margin = {top: 20, right: 20, bottom: 30, left: 40};
                var width = svg.attr("width") - margin.left - margin.right;
                var height = svg.attr("height") - margin.top - margin.bottom;

                var tip = d3.tip()
                  .attr('class', 'd3-tip')
                  .offset([-10, 0])
                  .html(function(d) {
                    return "<strong>Frequency:</strong> <span style='color:red'>" + d.frequency + "</span>";
                  });

                svg.call(tip);

                //Plotting our base area in svg in which chart will be shown 
                var g = svg.append("g").attr("transform", "translate(" + margin.left + "," + margin.top + ")");

                //X and Y scaling 
                var x = d3.scaleBand().rangeRound([0, width]).padding(0.4);
                var y = d3.scaleLinear().rangeRound([height, 0]);

                x.domain(data.map(function(d) { return d.letter; }));
                y.domain([0, d3.max(data, function(d) { return +d.frequency; })]);

                //Final Plotting 

                //for x axis 
                g.append("g")
                    .call(d3.axisBottom(x))
                    .attr("transform", "translate(0," + height + ")");

                //for y axis 
                g.append("g")
                    .call(d3.axisLeft(y))
                    .append("text").attr("transform", "rotate(-90)").attr("text-anchor", "end");

                //the line function for path 
                var lineFunction = d3.line()
                    .x(function(d) {return x(d.letter); })
                    .y(function(d) { return y(d.frequency); })
                    .curve(d3.curveCardinal);

                //defining the lines
                var path = g.append("path");

                //plotting lines
                path
                    .attr("d", lineFunction(data))
                    .attr("stroke", "#fc9027")
                    .attr("stroke-width", 2)
                    .attr("fill", "none");

                g.selectAll('.circles1')
                    .data(data)
                    .enter()
                    .append('circle')
                    .attr('cx', function(d) {
                    return x(d.letter);
                    })
                    .attr('cy', function(d) {
                    return y(d.frequency);
                    })
                    .attr('r', 6)
                    .style("fill", "#fc9027")
                    .on('mouseover', tip.show)
                    .on('mouseout', tip.hide);

        });

    </script> 

</body> 

</html>

错误：

参考：

http://bl.ocks.org/Caged/6476579

Answer 1

d3.tip不属于d3库。如果您正在使用它，则必须引用它：

<script src="http://labratrevenge.com/d3-tip/javascripts/d3.tip.v0.6.3.js"></script>

或者：

<script src="https://cdnjs.cloudflare.com/ajax/libs/d3-tip/0.7.1/d3-tip.js"></script>

D3 - 线图的工具提示给出错误

1 个答案: