d3.js 共享交换平台demo

今天在群里遇到一张图遂来玩一玩，先来上图!!
点击相应按钮，开关线路，此项目的重点是计算相应图形的位置，由于是个性化项目就没有封装布局。好了直接上代码。
<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>$Title$</title>

    <script src="https://d3js.org/d3.v4.min.js"></script>

    <style>

        .container {

            padding: 0 100px;

        }

        button {

            width: 100px;

        }

        .rect {

            stroke: #406DA7;

            fill: #6693CC;

            stroke-width: 2;

        }

        .center {

            stroke: #FF3336;

            fill: #FF7F7E;

            stroke-width: 2;

        }

        .text {

            fill: #ffffff;

            text-anchor: middle;

            font-size: 30px;

            shape-rendering: crispEdges;

        }

        .circle {

            fill: #ffffff;

            stroke: #FF7F7E;

            stroke-width: 2;

        }

        .cha {

            fill: #ffffff;

            stroke: #FF7F7E;

            stroke-width: 2;

        }

        .dash1 {

            stroke-dashArray: 15 5;

            stroke-width: 4;

            stroke: #6693CC;

        }

        .dash2 {

            stroke-dashArray: 15 5;

            stroke-width: 4;

            stroke: #FF7F7E;

        }

        .marker1 {

            fill: none;

            stroke: #6693CC;

            stroke-width: 4;

        }

        .marker2 {

            fill: none;

            stroke: #FF7F7E;

            stroke-width: 4;

        }

        .line {

            stroke: #6693CC;

            stroke-width: 4;

        }

    </style>

</head>

<body>

<script>

    var width = 2000;

    var height = 1200;

    var margin = 100;

    var everyW = 280;

    var leftData = ['上海市城管局','北京市城管局','天津市城管局','重庆市城管局','大庆市城管局','黑河市城管局','鸡西市城管局','鹤岗市城管局'];

    var rightData = ['上海市建筑委','北京市建筑委','天津市建筑委','重庆市建筑委','大庆市建筑委','黑河市建筑委','鸡西市建筑委','鹤岗市建筑委'];

    var everyH = ( height - margin * 2 ) / leftData.length / 2;

    var scaleL = d3.scaleLinear().domain([0, leftData.length - 1]).range([0, height - margin * 2 - everyH])

    var scaleR = d3.scaleLinear().domain([0, rightData.length - 1]).range([0, height - margin * 2 - everyH])

    var text = '共享交换平台'

    render();

    function render() {

        var svg = d3.select('body')

        .append('svg')

        .attr('width',  1000)

        .attr('height', 600)

        .attr('viewBox', `0, 0, ${width}, ${height}`)

        .attr("preserveAspectRatio", "xMidYMid meet")

        .style('border', '1px solid #777')

        var defs = svg.append('defs')

        var cha = defs

        .append('g')

        .attr('id', 'cha')

        cha.append('circle')

        .attr('cx', 20)

        .attr('cy', 20)

        .attr('r', 19)

        .attr('class', 'circle')

        cha.append('path')

        .attr('d', 'M 11 15 L 25 31 A 3 3 0 0 0 29 25 L 15 9 A 3 3 0 0 0 11 15 Z')

        .attr('class', 'cha')

        cha.append('path')

        .attr('d', 'M 29 15 L 15 31 A 3 3 0 0 1 11 25 L 25 9 A 3 3 0 0 1 29 15 Z')

        .attr('class', 'cha')

        var markerA1 = defs

        .append('g')

        .attr('id', 'markerA1')

        markerA1.append('line')

        .attr('x1', everyW + 2)

        .attr('y1', everyH / 2)

        .attr('x2', everyW * 1 / 4 + width / 4 - margin / 2)

        .attr('y2', everyH / 2)

        .attr('class', 'dash1')

        var markerA2 = defs

        .append('g')

        .attr('id', 'markerA2')

        markerA2.append('line')

        .attr('x1', everyW + 2)

        .attr('y1', everyH / 2)

        .attr('x2', everyW * 1 / 4 + width / 4 - margin / 2)

        .attr('y2', everyH / 2)

        .attr('class', 'dash2')

        markerA2.append('use')

        .attr('x', everyW * 5 / 8 + width / 8 - margin / 4 - 20)

        .attr('y', everyH / 2 - 20)

        .attr('xlink:href', '#cha')

        var markerB1 = defs

        .append('g')

        .attr('id', 'markerB1')

        markerB1.append('line')

        .attr('x1', everyW * 3 / 4 - width / 4 + margin  / 2)

        .attr('y1', everyH / 2)

        .attr('x2', -10)

        .attr('y2', everyH / 2)

        .attr('class', 'dash1')

        markerB1.append('path')

        .attr('d', `M -30 ${everyH / 2 - 16} L -10 ${everyH / 2} L -30 ${everyH / 2 + 16}`)

        .attr('class', 'marker1')

        var markerB2 = defs

        .append('g')

        .attr('id', 'markerB2')

        markerB2.append('line')

        .attr('x1', everyW * 3 / 4 - width / 4 + margin  / 2)

        .attr('y1', everyH / 2)

        .attr('x2', -10)

        .attr('y2', everyH / 2)

        .attr('class', 'dash2')

        markerB2.append('path')

        .attr('d', `M -30 ${everyH / 2 - 16} L -10 ${everyH / 2} L -30 ${everyH / 2 + 16}`)

        .attr('class', 'marker2')

        markerB2.append('use')

        .attr('x', everyW * 3 / 8 - width / 8)

        .attr('y', everyH / 2 - 20)

        .attr('xlink:href', '#cha')

        var body = svg.append('g')

        .attr('transform', `translate(${margin},${margin})`)

        .attr('class', 'body')

        var leftG = body.append('g').attr('class', 'left');

        var rightG = body.append('g').attr('class', 'right');

        let leftObj = leftG.selectAll('g.left-g').data(leftData).enter().append('g').attr('class', 'left-g').attr('transform', (d,i) => `translate(0,${scaleL(i)})`).attr('id', (d,i) => `l_${i}`);

        let rightObj = rightG.selectAll('g.right-g').data(rightData).enter().append('g').attr('class', 'right-g').attr('transform', (d,i) => `translate(${width - margin * 2 - everyW},${scaleL(i)})`).attr('id', (d,i) => `r_${i}`);;

        leftObj.append('rect')

        .attr('width', everyW)

        .attr('height', everyH)

        .attr('rx', 6)

        .attr('class', 'rect')

        leftObj.append('text')

        .attr('class', 'text')

        .attr('dy', '1.4em')

        .text(d => d)

        .attr('transform', `translate(${everyW / 2}, 0)`)

        leftObj.append('use')

        .attr('x',0)

        .attr('y', 0)

        .attr('xlink:href', '#markerA1')

        rightObj.append('rect')

        .attr('width', everyW)

        .attr('height', everyH)

        .attr('rx', 6)

        .attr('class', 'rect')

        rightObj.append('text')

        .attr('class', 'text')

        .attr('dy', '1.4em')

        .text(d => d)

        .attr('transform', `translate(${everyW / 2}, 0)`)

        rightObj.append('use')

        .attr('x',0)

        .attr('y', 0)

        .attr('xlink:href', '#markerB1')

        var centerObj = body.append('g')

        .attr('transform', `translate(${width / 2 - margin - everyW / 2}, ${height / 2 - margin - everyH / 2   })`)

        centerObj.append('rect')

        .attr('width', everyW)

        .attr('height', everyH)

        .attr('rx', 6)

        .attr('class', 'center')

        centerObj.append('text')

        .attr('class', 'text')

        .attr('dy', '1.4em')

        .text(text)

        .attr('transform', `translate(${everyW / 2}, 0)`)

        body.append('line')

        .attr('x1', everyW * 1 / 4 + width / 4 - margin / 2)

        .attr('y1', everyH / 2 - 2)

        .attr('x2', everyW * 1 / 4 + width / 4 - margin / 2)

        .attr('y2', height - margin * 2 - everyH / 2 + 2)

        .attr('class', 'line')

        body.append('line')

        .attr('x1', width * 3 / 4 - margin * 3 / 2 - everyW * 1 / 4)

        .attr('y1', everyH / 2 - 2)

        .attr('x2', width * 3 / 4 - margin * 3 / 2 - everyW * 1 / 4)

        .attr('y2', height - margin * 2 - everyH / 2 + 2)

        .attr('class', 'line')

        body.append('line')

        .attr('x1', everyW * 1 / 4 + width / 4 - margin / 2)

        .attr('y1', height / 2 - margin)

        .attr('x2', width / 2 - margin - everyW / 2 - 10)

        .attr('y2', height / 2 - margin)

        .attr('class', 'line')

        body.append('path')

        .attr('d', `M ${width / 2 - margin - everyW / 2 - 30} ${height / 2 - margin - 16} L ${width / 2 - margin - everyW / 2 - 10} ${height / 2 - margin} L ${width / 2 - margin - everyW / 2 - 30} ${height / 2 - margin + 16}`)

        .attr('class', 'marker1')

        body.append('line')

        .attr('x1', (width - margin * 2 - 3 * everyW ) / 2 + 2 * everyW)

        .attr('y1', height / 2 - margin)

        .attr('x2', (width - margin * 2 - 3 * everyW ) * 3 / 4 + 2 * everyW)

        .attr('y2', height / 2 - margin)

        .attr('class', 'line')

    }

    function clickLeft(dom, num) {

        if(dom.getAttribute('off') == "true") {

            dom.setAttribute('off', "false");

            d3.select(".left").select(`#l_${num}`).select('use').attr('xlink:href', '#markerA2');

        } else {

            dom.setAttribute('off', "true");

            d3.select(".left").select(`#l_${num}`).select('use').attr('xlink:href', '#markerA1');

        }

    }

    function clickRight(dom, num) {

        if(dom.getAttribute('off') == "true") {

            dom.setAttribute('off', "false");

            d3.select(".right").select(`#r_${num}`).select('use').attr('xlink:href', '#markerB2');

        } else {

            dom.setAttribute('off', "true");

            d3.select(".right").select(`#r_${num}`).select('use').attr('xlink:href', '#markerB1');

        }

    }

</script>

<div class="container">

    <table>

        <tr>

            <td>左侧</td>

            <td><button off="true" onclick="clickLeft(this, 0)">1</button></td>

            <td><button off="true" onclick="clickLeft(this, 1)">2</button></td>

            <td><button off="true" onclick="clickLeft(this, 2)">3</button></td>

            <td><button off="true" onclick="clickLeft(this, 3)">4</button></td>

            <td><button off="true" onclick="clickLeft(this, 4)">5</button></td>

            <td><button off="true" onclick="clickLeft(this, 5)">6</button></td>

            <td><button off="true" onclick="clickLeft(this, 6)">7</button></td>

            <td><button off="true" onclick="clickLeft(this, 7)">8</button></td>

        </tr>

        <tr>

            <td>右侧</td>

            <td><button off="true" onclick="clickRight(this, 0)">1</button></td>

            <td><button off="true" onclick="clickRight(this, 1)">2</button></td>

            <td><button off="true" onclick="clickRight(this, 2)">3</button></td>

            <td><button off="true" onclick="clickRight(this, 3)">4</button></td>

            <td><button off="true" onclick="clickRight(this, 4)">5</button></td>

            <td><button off="true" onclick="clickRight(this, 5)">6</button></td>

            <td><button off="true" onclick="clickRight(this, 6)">7</button></td>

            <td><button off="true" onclick="clickRight(this, 7)">8</button></td>

        </tr>

    </table>

</div>

</body>

</html>
这里坐标原点没有挡在画布中心使得计算量增大（多思考确实可以减少好多代码量）。
由于是定制化很高的简单的demo，所有代码没有做模块化，用到的人不会很多，但是学好d3,可以让我们做更多更好的定制化项目。
想预览代码和下载的朋友请移步至 http://www.bettersmile.cn
巴特西

d3.js 共享交换平台demo

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