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更新D3v7和弦布局

2022-09-16 12:27:58 資料庫

最近我試圖理解 D3 和弦圖,尤其是 D3v7。我有兩個不同的資料集,想動態更新這些資料集。一般來說,它可以解決兩個問題:

  1. 每個資料集中的第一個物件將被忽略。我不知道為什么,因為任何 console.log 都顯示現有資料,但它根本沒有繪制。例如,基于 groups1 和 paths1 的資料集 1 缺少物件 A,而在 dataset2 中缺少物件 E。

  2. 一旦圖表更新,舊元素仍然存在,并且圖表會創建新路徑而不洗掉舊路徑。每次單擊和更改都會增加瀏覽器中的 D3 元素,而不是替換它們。

由于 D3v3 和 D3v7 發生了一些變化,我無法快速弄清楚以幫助自己。

////////////////////////////////////////////////////////////
        ////////////////////// Set-Up Data /////////////////////////
        ////////////////////////////////////////////////////////////
        
        let groups1 = [
            { name: "A", color: "blue" },
            { name: "B", color: "red" },
            { name: "C", color: "green" },
            { name: "D", color: "yellow" },
        ]

        let paths1 = [
            { from: groups1.name = "A", to: groups1.name = "A", strength: 0 },
            { from: groups1.name = "A", to: groups1.name = "B", strength: 5 },
            { from: groups1.name = "A", to: groups1.name = "C", strength: 5 },
            { from: groups1.name = "A", to: groups1.name = "D", strength: 5 },
            { from: groups1.name = "B", to: groups1.name = "A", strength: 5 },
            { from: groups1.name = "B", to: groups1.name = "B", strength: 0 },
            { from: groups1.name = "B", to: groups1.name = "C", strength: 5 },
            { from: groups1.name = "B", to: groups1.name = "D", strength: 5 },
            { from: groups1.name = "C", to: groups1.name = "A", strength: 5 },
            { from: groups1.name = "C", to: groups1.name = "B", strength: 5 },
            { from: groups1.name = "C", to: groups1.name = "C", strength: 0 },
            { from: groups1.name = "C", to: groups1.name = "D", strength: 5 },
            { from: groups1.name = "D", to: groups1.name = "D", strength: 0 },
            { from: groups1.name = "D", to: groups1.name = "A", strength: 5 },
            { from: groups1.name = "D", to: groups1.name = "B", strength: 5 },
            { from: groups1.name = "D", to: groups1.name = "C", strength: 5 },
        ]


        let groups2 = [
            { name: "E", color: "#301E1E" },
            { name: "F", color: "#083E77" },
            { name: "G", color: "#342350" },
        ]

        let paths2 = [
            { from: groups2.name = "E", to: groups2.name = "E", strength: 0 },
            { from: groups2.name = "E", to: groups2.name = "F", strength: 5 },
            { from: groups2.name = "E", to: groups2.name = "G", strength: 5 },
            { from: groups2.name = "F", to: groups2.name = "E", strength: 5 },
            { from: groups2.name = "F", to: groups2.name = "F", strength: 0 },
            { from: groups2.name = "F", to: groups2.name = "G", strength: 5 },
            { from: groups2.name = "G", to: groups2.name = "E", strength: 5 },
            { from: groups2.name = "G", to: groups2.name = "F", strength: 5 },
            { from: groups2.name = "G", to: groups2.name = "G", strength: 0 },
        ]

        let chord = []
        let matrix = []

        function getMatrix(paths, groups) {
            matrix = []

            var mapPaths = paths.map(item => {
                const container = {}
                    container.from = groups.findIndex(ele => ele.name == item.from)
                    container.to = groups.findIndex(ele => ele.name == item.to)
                    container.strength = item.strength
                return container
            })
            
            mapPaths.forEach(function (item) {
                // initialize sub-arra if not yet exists
                if (!matrix[item.to]) {
                    matrix[item.to] = []
                }

                matrix[item.to][item.from] = item.strength
            })

            return matrix
        }

        // --- --- --- --- --- ---

        const vw = document.documentElement.clientWidth / 2
        const vh = document.documentElement.clientHeight / 2

        let innerRadius = Math.min(vw, vh) * 0.5 
        let outerRadius = innerRadius * 1.1;
        
        let svg = d3.select("#chart").append("svg")
            .attr("width", vw)
            .attr("height", vh)
            .attr("overflow", "unset")  

        var chordGenerator = d3.chord()
            .padAngle(0.10)
            .sortSubgroups(d3.ascending)
            .sortChords(d3.descending)

        chord = chordGenerator(getMatrix(paths1, groups1))

        var arc = d3.arc()
            .innerRadius(innerRadius * 1.01)
            .outerRadius(outerRadius)

        var ribbon = d3.ribbon()
            .radius(innerRadius);
    
        window.update = update;

        update(paths1, groups1)

        function update(thisPaths, thisGroups) {
            let groups = thisGroups
            let paths = thisPaths

            getMatrix(thisPaths, thisGroups)

            const chords = chordGenerator(matrix);

            let wrapper = svg.append("g")
                .attr("transform", "translate("   vw / 2   ","   vh / 2   ")")

            let ribbons = wrapper.append("g");
            
            let g = wrapper.selectAll("g")
                    .data(chord.groups)
                    .enter()
                    .append("g")
                    .attr("class", "group")

            const ribbonsUpdate = ribbons.selectAll("path")
                .data(chords, ({ source, target }) => source.index   '-'   target.index)

            const duration = 1000;

            ribbonsUpdate
                .transition()
                .duration(duration)
                .attr("d", ribbon)
                .style("fill", function (d) { return groups[d.target.index].color; })
                
            ribbonsUpdate
                .enter()
                .append("path")
                .attr("opacity", 0)
                .attr("d", ribbon)
                .style("fill", function (d) { return groups[d.target.index].color; })
                .transition()
                .duration(duration)
                .attr('opacity', 1)
                
            // adding Arc Blocks
            g.append("path")
                .style("fill", function (d) { return groups[d.index].color; })
                .attr("d", arc)
                .style("opacity", 1)

            // adding labels
            g.append("text")
                .each(function(d){ d.angle = (d.startAngle   d.endAngle) / 2; })
                .attr("dy", ".35em")
                .attr("class", "titles")
                .attr("text-anchor", function(d) { return d.angle > Math.PI ? "end" : null; })
                .attr("transform", function(d) {
                    return "rotate("   (d.angle * 180 / Math.PI - 90)   ")"
                      "translate("   (outerRadius   10)   ")"
                      (d.angle > Math.PI ? "rotate(180)" : "");
                })
                .text(function(d,i){ return groups[i].name; })

            ribbonsUpdate
                .exit()
                .transition()
                .duration(duration)
                .attr("opacity", 0)
                .remove();
        }

        document.getElementById('data1').onclick = () => {
            chord = chordGenerator(getMatrix(paths1, groups1))
            update(paths1, groups1);
        }

        document.getElementById('data2').onclick = () => {
            chord = chordGenerator(getMatrix(paths2, groups2))
            update(paths2, groups2);
        }
body {
        font-size: 16px;
        font-family: 'Oswald', sans-serif;
        text-align: center;
        background-color: #ECF0F3;
        cursor: default;
        overflow: hidden;
    }
<!DOCTYPE html>
<html>

<head>
    <meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
    <title>Animated_D3v7</title>

    <!-- jQuery -->
    <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.1/jquery.min.js"></script>
    
    <!-- D3.js -->
    <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/7.6.1/d3.min.js" charset="utf-8"></script>
    <!-- fontawesome stylesheet https://fontawesome.com/ -->
    <script src="https://kit.fontawesome.com/98a5e27706.js" crossorigin="anonymous"></script>
</head>

<style>
    body {
        font-size: 16px;
        font-family: 'Oswald', sans-serif;
        background-color: #ECF0F3;
        cursor: default;
        overflow: hidden;
    }

</style>

<body>
    <button id="data1">data 1</button>
    <button id="data2">data 2</button>
    
    <div id="chart"></div>
    
</body>

</html>

uj5u.com熱心網友回復:

問題 1 通過以下方式解決:

let g = wrapper.selectAll("g.group") // add class of 'group' to the selector

否則選擇有一些歧義,因為您已經在前面的陳述句中添加了一個gto :wrapperlet ribbons = wrapper.append("g");

問題 2 似乎涉及更多。

首先,每次update呼叫g都會在 下創建一個新的svg并分配給wrapper您可以在一次wrapper之外定義。update

其次,update使用兩者chordchords前者在外部更新update,后者在內部更新。您可以省去前者,只需更新chordmatrixupdate.

第三,您可以g為外部的每個弧線、絲帶和標簽設定一個,然后輸入、更新和退出邏輯對這些pathtext其中的元素起作用。

我在下面的作業示例中簡化了其他一些小細節:

const vw = document.documentElement.clientWidth / 2
const vh = document.documentElement.clientHeight / 2
const innerRadius = Math.min(vw, vh) * 0.4 
const outerRadius = innerRadius * 1.1;
const duration = 1000;

const svg = d3.select("#chart").append("svg")
    .attr("width", vw)
    .attr("height", vh)

const wrapper = svg.append("g")
    .attr("transform", "translate("   vw / 2   ","   vh / 2   ")")
    
const ribbonsG = wrapper.append("g").attr("id", "ribbons")
const arcsG = wrapper.append("g").attr("id", "arcs")
const labelsG = wrapper.append("g").attr("id", "labels")
    
const chordGenerator = d3.chord()
    .padAngle(0.10)
    .sortSubgroups(d3.ascending)
    .sortChords(d3.descending)

const arc = d3.arc()
    .innerRadius(innerRadius * 1.01)
    .outerRadius(outerRadius)

const ribbon = d3.ribbon()
    .radius(innerRadius);
    
update(paths1, groups1)

function getMatrix(paths, groups) {
    matrix = []

    var mapPaths = paths.map(item => {
        const container = {}
            container.from = groups.findIndex(ele => ele.name == item.from)
            container.to = groups.findIndex(ele => ele.name == item.to)
            container.strength = item.strength
        return container
    })

    mapPaths.forEach(function (item) {
        // initialize sub-arra if not yet exists
        if (!matrix[item.to]) {
            matrix[item.to] = []
        }

        matrix[item.to][item.from] = item.strength
    })

    return matrix
}

function update(thisPaths, thisGroups) {
    const groups = thisGroups
    const paths = thisPaths
    const chords = chordGenerator(getMatrix(thisPaths, thisGroups));

    // ribbons
    const ribbonsUpdate = ribbonsG
        .selectAll("path.ribbon")
        .data(chords, ({ source, target }) => source.index   '-'   target.index)
    
    const ribbonsEnter = ribbonsUpdate
        .enter()
        .append("path")
        
    ribbonsUpdate
        .merge(ribbonsEnter)
        .attr("opacity", 0)
        .attr("class", "ribbon")        
        .transition()
        .duration(duration)
        .attr("d", ribbon)
        .style("fill", function (d) { return groups[d.target.index].color; })
        .attr('opacity', 1)

    ribbonsUpdate
        .exit()
        .transition()
        .duration(duration)
        .attr("opacity", 0)
        .remove();
        
    // arcs
    const arcsUpdate = arcsG
        .selectAll("path.arc")
        .data(chords.groups)

    const arcsEnter = arcsUpdate
        .enter()
        .append("path")

    arcsUpdate
        .merge(arcsEnter)
        .attr("opacity", 0)
        .attr("class", "arc")
        .transition()
        .duration(duration)
        .attr("d", arc)
        .style("fill", function (d) { return groups[d.index].color; })
        .attr('opacity', 1)

    arcsUpdate
        .exit()
        .transition()
        .duration(duration)
        .attr("opacity", 0)
        .remove();

    // adding labels
    const labelsUpdate = labelsG
        .selectAll("text.titles")
        .data(chords.groups)

    const labelsEnter = labelsUpdate
        .enter()
        .append("text")

    labelsUpdate
        .merge(labelsEnter)
        .attr("class", "titles")
        .attr("opacity", 0)
        .transition()
        .duration(duration)
        .each(function(d){ d.angle = (d.startAngle   d.endAngle) / 2; })
        .attr("dy", ".35em")
        .attr("text-anchor", function(d) { return d.angle > Math.PI ? "end" : null; })
        .attr("transform", function(d) {
            return "rotate("   (d.angle * 180 / Math.PI - 90)   ")"
                  "translate("   (outerRadius   10)   ")"
                  (d.angle > Math.PI ? "rotate(180)" : "");
        })
        .text(function(d,i){ return groups[i].name; })        
        .attr("opacity", 1)
        
    labelsUpdate
        .exit()
        .remove()
}

document.getElementById('data1').onclick = () => {
    update(paths1, groups1);
}

document.getElementById('data2').onclick = () => {
    update(paths2, groups2);
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/7.6.1/d3.min.js" charset="utf-8"></script>
<div id="chart"></div>
<button id="data1">data 1</button>
<button id="data2">data 2</button>
<script>
let groups1 = [
    { name: "A", color: "blue" },
    { name: "B", color: "red" },
    { name: "C", color: "green" },
    { name: "D", color: "yellow" },
]

let paths1 = [
    { from: groups1.name = "A", to: groups1.name = "A", strength: 0 },
    { from: groups1.name = "A", to: groups1.name = "B", strength: 5 },
    { from: groups1.name = "A", to: groups1.name = "C", strength: 5 },
    { from: groups1.name = "A", to: groups1.name = "D", strength: 5 },
    { from: groups1.name = "B", to: groups1.name = "A", strength: 5 },
    { from: groups1.name = "B", to: groups1.name = "B", strength: 0 },
    { from: groups1.name = "B", to: groups1.name = "C", strength: 5 },
    { from: groups1.name = "B", to: groups1.name = "D", strength: 5 },
    { from: groups1.name = "C", to: groups1.name = "A", strength: 5 },
    { from: groups1.name = "C", to: groups1.name = "B", strength: 5 },
    { from: groups1.name = "C", to: groups1.name = "C", strength: 0 },
    { from: groups1.name = "C", to: groups1.name = "D", strength: 5 },
    { from: groups1.name = "D", to: groups1.name = "D", strength: 0 },
    { from: groups1.name = "D", to: groups1.name = "A", strength: 5 },
    { from: groups1.name = "D", to: groups1.name = "B", strength: 5 },
    { from: groups1.name = "D", to: groups1.name = "C", strength: 5 },
]


let groups2 = [
    { name: "E", color: "#301E1E" },
    { name: "F", color: "#083E77" },
    { name: "G", color: "#11AA99" },
]

let paths2 = [
    { from: groups2.name = "E", to: groups2.name = "E", strength: 0 },
    { from: groups2.name = "E", to: groups2.name = "F", strength: 5 },
    { from: groups2.name = "E", to: groups2.name = "G", strength: 5 },
    { from: groups2.name = "F", to: groups2.name = "E", strength: 5 },
    { from: groups2.name = "F", to: groups2.name = "F", strength: 0 },
    { from: groups2.name = "F", to: groups2.name = "G", strength: 5 },
    { from: groups2.name = "G", to: groups2.name = "E", strength: 5 },
    { from: groups2.name = "G", to: groups2.name = "F", strength: 5 },
    { from: groups2.name = "G", to: groups2.name = "G", strength: 0 },
]
</script>

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標籤:javascriptd3.js和弦图

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