d3.js 绘制北京市地铁线路状况图(部分)

Posted 2020-11-15 vadim-web

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地铁线路图的可视化一直都是路网公司的重点，今天来和大家一起绘制线路图。先上图。

技术图片

点击线路按钮，显示相应的线路。点击线路图下面的站间按钮（图上未显示），上报站间故障。

首先就是制作json文件，这个文件包括两部分，一部分是站点信息，另一部分就是线路信息，由于时间问题，我只写了5条线路（10号线站点太tm多了）；

然后就是构造类文件，不多说；

之后就是主要的操作线路图的逻辑，还画了一个天安门。

好了废话不多说，下面上代码

1.主要代码

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>$Title$</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }
        body {
            cursor: pointer;
        }
        #subway {
            margin: 10px;
            overflow: scroll;
        }
        .list {
            display: inline-block;
            width: 100vw;
            height: 800px;
            margin-left: 10px;
            border: 1px solid #000;
            vertical-align: top;
        }
        #chartId {
            width: 100vw;
            height: 100vh;
            /*border: 1px solid #000;*/
            display: inline-block;
        }
        .svg-container {
            display: inline-block;
            position: relative;
            width: 100%;
            height: 100%;
            /*padding-bottom: 100%; !* aspect ratio *!*/
            vertical-align: top;
            overflow: hidden;
        }
        .svg-content-responsive {
            display: inline-block;
            position: absolute;
            top: 10px;
            left: 0;
        }
    </style>
    <script src="./d3.v5.min.js"></script>
</head>
<body>
<div id="chartId"></div>
<script src="./subway.js"></script>
<script src="./class.js"></script>
<script>

    var svg = d3.select("div#chartId")
    .append(‘div‘)
    .classed("svg-container", true)
    .append("svg")
    .attr("preserveAspectRatio", "xMinYMin meet")
    .attr("viewBox", "0 0 1200 800")
    .classed("svg-content-responsive", true);


    const chartId = document.getElementById(‘chartId‘);
    const widthStr = chartId.currentStyle ? chartId.currentStyle.width : window.getComputedStyle(chartId,null).width ;
    const width = widthStr.substring(0, widthStr.length - 2);
    const svgScale = width / 1200;
    const group = svg.append(‘g‘);
    const lines = group.append(‘g‘);
    const points = group.append(‘g‘);
    const texts = group.append(‘g‘);
    const buttons = group.append(‘g‘);
    const tianAnMen = group.append(‘g‘);
    const originalLineData = subwayLines;
    const originalPointData = subwayPoints;
    const subway = new Subway();
    const zoom = d3.zoom().on("zoom", zoomed);
    svg.call(zoom)
    function zoomed () {
        group.attr(‘transform-origin‘, `${d3.event.sourceEvent.offsetX}, ${d3.event.sourceEvent.offsetY}`)
        group.attr("transform", d => `translate(${d3.event.transform.x}, ${d3.event.transform.y}) scale(${d3.event.transform.k})`)
    }
    let copyLineData = originalLineData.slice(0);
    let copyPointData = originalPointData.slice(0);
    let bugLines = [];
    let shadow = svg.append(‘defs‘).append(‘filter‘).attr(‘id‘, ‘shadow‘)//.attr(‘height‘, ‘125%‘).attr(‘width‘, ‘110%‘);
    shadow.append(‘feGaussianBlur‘).attr(‘in‘, ‘SourceGraphic‘).attr(‘stdDeviation‘, 1).attr(‘result‘, ‘blur‘);

    const rendering = (lineData,pointData) => {
        lines.selectAll(‘g‘).remove();
        points.selectAll(‘g‘).remove();
        texts.selectAll(‘g‘).remove();
        for (let i=0; i<lineData.length; i++) {
            lines.append(‘g‘)
            .attr(‘class‘,`.${lineData[i].name}`)
            .selectAll(‘path‘)
            .data(lineData[i].lines)
            .enter()
            .append(‘path‘)
            .attr(‘class‘, d => d.state_name)
            .attr(‘class‘, d => d.state_name)
            .attr(‘d‘, d => d.state_path)
            .attr(‘stroke‘, d => {
                if (bugLines.indexOf(d.state_name) > -1) {
                    return ‘#000‘;
                } else {
                    return d.state_color;
                }
            })
            .attr(‘stroke-width‘, d => {
                if (bugLines.indexOf(d.state_name) > -1) {
                    return 8;
                } else {
                    return 4;
                }
            })
            .attr(‘fill‘, ‘none‘)
            .on(‘click‘, function (e) {
                if (bugLines.indexOf(this.getAttribute(‘class‘)) > -1) {
                    let arr = e.state_name.split(‘_‘)
                    renderTooltip(d3.event.offsetX,d3.event.offsetY, `${subway.getChinaBypoint(arr[0])}到${subway.getChinaBypoint(arr[1])}一线有道路施工。`)
                }
            })
            .attr(‘opacity‘, 0)
            .transition()
            .duration(500)
            .attr(‘opacity‘, 1)

            points.append(‘g‘)
            .attr(‘class‘,`.${pointData[i].name}`)
            .selectAll(‘circle‘)
            .data(pointData[i].points)
            .enter()
            .append(‘circle‘)
            .attr(‘class‘, d => d.state_name)
            .attr(‘cx‘, d => d.point_x)
            .attr(‘cy‘, d => d.point_y)
            .attr(‘r‘, d => {
                if (d.pivot == 1) {
                    return 5
                } else {
                    return 3
                }
            })
            .attr(‘fill‘, ‘#fff‘)
            .attr(‘stroke‘, ‘#000‘)
            .attr(‘opacity‘, 0)
            .transition()
            .duration(500)
            .attr(‘opacity‘, 1)

            texts.append(‘g‘)
            .attr(‘class‘,`.${pointData[i].name}`)
            .selectAll(‘text‘)
            .data(pointData[i].points)
            .enter()
            .append(‘text‘)
            .attr(‘x‘, d => d.point_x + d.dx)
            .attr(‘y‘, d => d.point_y + d.dy)
            .attr(‘font-size‘, ‘8px‘)
            .attr(‘text-anchor‘, ‘middle‘)
            .text(d => d.state_nickname)
            .attr(‘opacity‘, 0)
            .transition()
            .duration(500)
            .attr(‘opacity‘, 1)
        }
    }

    const initButton = () => {
        const button_item = buttons.selectAll(‘g‘)
        .data(copyLineData)
        .enter()
        .append(‘g‘)
        .attr(‘class‘, d => d.name)
        .attr(‘transform‘, (d, i) => {
            return `translate(20, ${i * 35 + 55})`
        })

        button_item.append(‘rect‘)
        .attr(‘fill‘, d => d.line_color)
        .attr(‘x‘, 0)
        .attr(‘y‘, 0)
        .attr(‘width‘, 90)
        .attr(‘height‘, 24)
        .style(‘filter‘, ‘url(#shadow)‘)
        .on(‘click‘, function () {
            subwayLines = copyLineData.filter(i => this.parentNode.getAttribute(‘class‘) == i.name);
            subwayPoints = copyPointData.filter(i => this.parentNode.getAttribute(‘class‘) == i.name);
            rendering(subwayLines,subwayPoints);
            group.select(‘.tooltip‘).remove();
        })

        button_item.append(‘text‘)
        .attr(‘x‘, 45)
        .attr(‘y‘, 0)
        .attr(‘fill‘, ‘#fff‘)
        .text(d => `地铁${d.nick_name}`)
        .attr(‘text-anchor‘, ‘middle‘)
        .attr(‘dy‘, ‘1.3em‘)
        .attr(‘font-size‘, ‘12‘)
        .on(‘click‘, function () {
            let lines = copyLineData.filter(i => this.parentNode.getAttribute(‘class‘) == i.name);
            let points = copyPointData.filter(i => this.parentNode.getAttribute(‘class‘) == i.name);
            rendering(lines,points);
            group.select(‘.tooltip‘).remove();
        })

        const all_button= buttons.append(‘g‘)
        .attr(‘transform‘, `translate(20, 20)`);

        all_button.append(‘rect‘)
        .attr(‘fill‘, ‘#888‘)
        .attr(‘x‘, 0)
        .attr(‘y‘, 0)
        .attr(‘width‘, 90)
        .attr(‘height‘, 24)
        .style(‘filter‘, ‘url(#shadow)‘)
        .on(‘click‘, function () {
            rendering(copyLineData,copyPointData);
        })

        all_button.append(‘text‘)
        .attr(‘x‘, 45)
        .attr(‘y‘, 0)
        .attr(‘fill‘, ‘#fff‘)
        .text(‘全部线路‘)
        .attr(‘text-anchor‘, ‘middle‘)
        .attr(‘dy‘, ‘1.3em‘)
        .attr(‘font-size‘, ‘12‘)
        .on(‘click‘, function () {
            rendering(copyLineData,copyPointData);
        })
    }

    const setBugLine = line_name => {
        bugLines.push(line_name);
        rendering(copyLineData,copyPointData);
    }

    const transformContent = content => {
        let arr = [];
        let count = 0;
        let cont = ‘‘;
        let every = 24;
        for(let i=0; i<content.length - 1; i++) {
            //已经满every
            if (count == every) {
                count = 0;
                cont = cont + ‘&&‘;
                if (/^[u4e00-u9fa5]*$/.test(content[i])) {
                    count += 2;
                    cont = cont + content[i]
                } else {
                    count += 1;
                    cont = cont + content[i]
                }
            }
            //已经满every - 1且接下来为中文字符
            else if (count == (every - 1) && /^[u4e00-u9fa5]*$/.test(content[i])) {

            }
            //中文字符
            else if (/^[u4e00-u9fa5]*$/.test(content[i])){
                count += 2;
                cont = cont + content[i]
            }
            //非中文字符
            else {
                count += 1;
                cont = cont + content[i]
            }
        }
        return cont.split(‘&&‘)
    }

    const renderTooltip = (x,y,c) => {
        let content = transformContent(c);

        group.select(‘.tooltip‘).remove();
        let tooltip = group.append(‘g‘).attr(‘class‘, ‘tooltip‘);
        tooltip.append(‘path‘)
        .attr(‘d‘, ‘M 10,0 H 190 Q 200 0 200 10 V 130 Q 200 140 190 140 H 110 L 100,150 L 90,140 H 10 Q 0 140 0 130 V 10 Q 0 0 10 0 Z‘).attr(‘fill‘, ‘#141514‘).attr(‘stroke‘, ‘#141514‘).attr(‘stroke-width‘, ‘2‘);
        tooltip.append(‘g‘).attr(‘class‘, ‘delete‘).attr(‘width‘, 20).attr(‘height‘, 20)
        .on(‘click‘, () => {
            group.select(‘.tooltip‘).remove();
        })
        tooltip.select(‘.delete‘)
        .append(‘path‘)
        .attr(‘d‘, ‘M 190, 0 A 10 10 0 1 1 180 10 H 200 A 10 10 0 1 1 190 0 V 20‘)
        .attr(‘transform-origin‘, ‘190 10‘)
        .attr(‘transform‘, ‘translate(-2, 2) rotate(45)‘)
        .attr(‘stroke‘, ‘#F97D7E‘)
        .attr(‘stroke-width‘, 2)


        tooltip.append(‘text‘)
        .attr(‘x‘, 100)
        .attr(‘y‘, 20)
        .attr(‘fill‘, ‘#F97D7E‘)
        .attr(‘text-anchor‘, ‘middle‘)
        .attr(‘font-size‘, ‘16‘)
        .text(‘公告‘)

        let texts = tooltip.append(‘text‘)
        .attr(‘fill‘, ‘#F97D7E‘)
        .attr(‘x‘, 7)
        .attr(‘y‘, 40)
        .attr(‘font-size‘, ‘14‘)

        content.forEach((d, i) => {
            texts.append(‘tspan‘).attr(‘x‘, 6).attr(‘y‘, i * 20 + 44).text(d)
        })
        tooltip.attr(‘transform-origin‘, `${100} ${170}`).attr(‘transform‘, `translate(${x / svgScale - 100},${y /  svgScale - 170}) rotate(-90)`).transition().duration(1000).ease(d3.easeElasticOut) .attr(‘transform-origin‘, `${100} ${170}`).attr(‘transform‘, `translate(${x /  svgScale - 100},${y /  svgScale- 170}) rotate(0)`)
    }

    const initTianAnMen = () => {
        console.log( 2086   / 4)
        console.log(   1566 / 4) // 389V 389 H 541 V 188 H
        tianAnMen.append(‘path‘).attr(‘d‘, ‘M 505,399 H 518 V 398 H 519 V 399 H 523 V 397 H 524 V 399 H 528 V 396 H 529 V 399 H 534 V 397 H 535 V 399 H 538 V 398 H 539 V 399 H 552 L 550,393 H 543 V 395 H 536 L 537,393 H 529 V 395 H 528 V 393 H 520 L 520,395 H 514 V 393 H 507 Z‘).attr(‘fill‘, ‘#EE1B22‘)
        tianAnMen.append(‘path‘).attr(‘d‘, ‘M 517,393 H 519 V 392 H 528 V 391 H 529 V 392 H 538 V 393 H 540 V 391 H 541 V 390 H 540 V 389 H 541 V 388 H 539 L 537,385 H 536 L 535 386 H 521 L 520,385 H 519 L 518,388 H 516 V 389 H 517 V 390 H 516 V 391 H 517 Z‘).attr(‘fill‘, ‘#EE1B22‘)
        tianAnMen.append(‘path‘).attr(‘d‘, ‘M 519,391 H 520 V 390 H 519 Z‘).attr(‘fill‘, ‘#ffffff‘)
        tianAnMen.append(‘path‘).attr(‘d‘, ‘M 521.5,391 H 522.5 V 390 H 521.5 Z‘).attr(‘fill‘, ‘#ffffff‘)
        tianAnMen.append(‘path‘).attr(‘d‘, ‘M 524,391 H 525 V 390 H 524 Z‘).attr(‘fill‘, ‘#ffffff‘)
        tianAnMen.append(‘path‘).attr(‘d‘, ‘M 526.5,391 H 527.5 V 390 H 526.5 Z‘).attr(‘fill‘, ‘#ffffff‘)
        tianAnMen.append(‘path‘).attr(‘d‘, ‘M 529.5,391 H 530.5 V 390 H 529.5 Z‘).attr(‘fill‘, ‘#ffffff‘)
        tianAnMen.append(‘path‘).attr(‘d‘, ‘M 532,391 H 533 V 390 H 532 Z‘).attr(‘fill‘, ‘#ffffff‘)
        tianAnMen.append(‘path‘).attr(‘d‘, ‘M 534.5,391 H 535.5 V 390 H 534.5 Z‘).attr(‘fill‘, ‘#ffffff‘)
        tianAnMen.append(‘path‘).attr(‘d‘, ‘M 537,391 H 538 V 390 H 537 Z‘).attr(‘fill‘, ‘#ffffff‘)
    }

    rendering(copyLineData,copyPointData);
    initButton();
    initTianAnMen();


    window.onload = function () {
        let box = document.getElementById(‘mm‘);
        let str = ‘‘;
        for(let i=0; i<5; i++) {
            let nick_name = subway.getLines(i).nick_name;
            let arr = subway.getLines(i).lines;
            str = str + `<p>${nick_name}</p>`
            arr.forEach((item, index)=>{
                let points = item.state_name.split(‘_‘);
                str = str + `<button onclick="setBugLine(‘${item.state_name}‘)">${subway.getChinaBypoint(points[0])}>${subway.getChinaBypoint(points[1])}</button>`
            })
        }
        box.innerHTML = str;
    }



</script>
<div class="list">
    <p>设置故障线路</p>
    <div id="mm">

    </div>
    <p>点击黑色，显示封路原因</p>
</div>
</body>
</html>

2.Class类

class Subway {
    constructor() {
        this.lines = subwayLines;
        this.points = subwayPoints;
    }
    getLines(index) {
        return this.lines[index];
    }
    getChinaBypoint(element) {
        let str = ‘‘;
        this.points.forEach((item) => {
            item.points.forEach((items) => {
                if (items.state_name == element) {
                    str = items.state_nickname;
                }
            })
        })
        return str;
    }
}

3. 地铁线路数据js文件（纯手工造数据）

此数据包含站点数据和线路数据，由于数据过长就不粘贴了，想看的朋友可以到原文预览或者下载demo

原文链接

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