Question

我目前正在尝试使用D3在React中渲染绘图。为了整合它们，我使用了以下链接：

http://oli.me.uk/2015/09/09/d3-within-react-the-right-way/。

我还尝试了链接中提供的解决方案，以使图表响应：

Resize svg when window is resized in d3.js

虽然在与React集成后它在独立代码中运行良好，但它开始省略滴答。仅为D3工作jsfiddle：https://jsfiddle.net/adityap16/11edxrnq/1/

独立代码D3：

var data = [
{"mytime": "2015-12-01T11:10:00.000Z", "value": 64},
{"mytime": "2015-12-01T11:15:00.000Z", "value": 67},
{"mytime": "2015-12-01T11:20:00.000Z", "value": 70},
{"mytime": "2015-12-01T11:25:00.000Z", "value": 64},
{"mytime": "2015-12-01T11:30:00.000Z", "value": 72},
{"mytime": "2015-12-01T11:35:00.000Z", "value": 75},
{"mytime": "2015-12-01T11:40:00.000Z", "value": 71},
{"mytime": "2015-12-01T11:45:00.000Z", "value": 80}
];
var parseDate = d3.time.format("%Y-%m-%dT%H:%M:%S.%LZ").parse;

data.forEach(function(d) {
          d.mytime = parseDate(d.mytime);
        });
//var margin = { top: 30, right: 30, bottom: 40, left:50 },
var margin = { top: 30, right: 30, bottom: 40, left:50 },
height = 200,
width = 800;
var color =  "green";
var xaxis_param = "mytime";
var yaxis_param = "value"
var params1 =  {margin:margin,height:height,width:width, color: color, xaxis_param:xaxis_param, yaxis_param :yaxis_param};
draw_graph(data,params1);




function  draw_graph(data,params){


    //Get the margin 
    var xaxis_param = params.xaxis_param;
    var yaxis_param = params.yaxis_param;
    var color_code = params.color;
    var margin = params.margin;
    var height = params.height - margin.top - margin.bottom,
        width = params.width - margin.left - margin.right;

    var x_extent = d3.extent(data, function(d){
        return d[xaxis_param]});
    var y_extent = d3.extent(data, function(d){
        return d[yaxis_param]});

    var x_scale = d3.time.scale()
        .domain(x_extent)
        .range([0,width]);


    var y_scale = d3.scale.linear()
        .domain([0,y_extent[1]])
        .range([height,0]);



    //Line
    var lineGen = d3.svg.line()
        .x(function (d) {
            return x_scale(d[xaxis_param]);
        })
        .y(function (d) {
            return y_scale(d[yaxis_param]);
        });
    var myChart = d3.select('body')
              .append("div")
             .classed("svg-container", true)
             .append('svg')
     .attr("preserveAspectRatio", "xMinYMin meet")
   .attr("viewBox", "0 0 800 600")
   //class to make it responsive
   .classed("svg-content-responsive", true)    
                    .attr('class','my-chart')
                    .style('background', '#E7E0CB')

                    .append('g')
                    .attr('transform', 'translate('+ margin.left +', '+ margin.top +')');
            myChart
                    .append('svg:path')
                    .datum(data)
                    .attr('class', 'line')
                    .attr("d",lineGen)
                    .attr('stroke', color_code)
                    .attr('stroke-width', 1)
                    .attr('fill', 'none');


    var legend = myChart.append("g")
          .attr("class", "legend")
          .attr("transform", "translate(" + 5 + "," + (height - 25) + ")")

        legend.append("rect")
          .style("fill", color_code)
          .attr("width", 20)
          .attr("height", 20);

        legend.append("text")
          .text(yaxis_param)
          .attr("x", 25)
          .attr("y", 12);

    var vGuideScale = d3.scale.linear()
        .domain([0,y_extent[1]])
        .range([height, 0])

    var vAxis = d3.svg.axis()
        .scale(vGuideScale)
        .orient('left')
        .ticks(5)


    var hAxis = d3.svg.axis()
        .scale(x_scale)
        .orient('bottom')
        .ticks(d3.time.minute, 5);

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

  myChart.append("g")
      .attr("class", "y axis")
      .call(vAxis)


}

我可能需要在调整大小时需要setState或其他东西，它应该触发React用新信息重新渲染但是对React不熟悉，我无法使其工作。

编辑：我仍在尝试编辑，但问题似乎是缩小窗口时x轴和y轴上的刻度，你可以看到刻度而不是全屏。还在试着理解为什么？

谢谢！

Answer 1

所以我能够在Reith on Github上的一个公开问题中找到答案（react-d3组件）。附件是链接和代码段：

https://github.com/codesuki/react-d3-components/issues/9

代码：

let AreaGraph = React.createClass({
    mixins: [React.addons.PureRenderMixin],

    getInitialState() {
        return {
            parentWidth: 0
        }
    },

    getDefaultProps() {
        return {
            width: '100%',
            height: 300,
            margin: { left: -1, top: 10, bottom: 0, right: 1 }
        }
    },

    handleResize(e) {
        let elem = this.getDOMNode();
        let width = elem.offsetWidth;

        this.setState({
            parentWidth: width
        });
    },

    componentDidMount() {
        if(this.props.width === '100%') {
            window.addEventListener('resize', this.handleResize);
        }
        this.handleResize();
    },

    componentWillUnmount() {
        if(this.props.width === '100%') {
            window.removeEventListener('resize', this.handleResize);
        }
    },

    render() {
        let { width, height, margin, xScale, yScale, xAxis, ...props } = this.props;

        // Determine the right graph width to use if it's set to be responsive
        if(width === '100%') {
            width = this.state.parentWidth || 400;
        }

        // Set scale ranges
        xScale && xScale.range([0, width - (margin.left + margin.right)]);
        yScale && yScale.range([height - (margin.top + margin.bottom), 0]);

        return (
            <div className={"usage__cpu__graph "+props.className}>
                <AreaChart
                    ref="chart"
                    width={width}
                    height={height}
                    margin={margin} 
                    xScale={xScale}
                    yScale={yScale}
                    xAxis={xAxis}
                    {...props} 
                />
            </div>
        );
    }
})

使D3图表在React app中响应

1 个答案: