javascript - 单击将标签锚定到 Chart.js 中的相应部分 HTML

Question

我有一个图表，当点击每个图表标签时，滚动会移动到它们各自的 HTML 部分。我正在使用 Chart.js，当我单击标签时，我唯一能做的就是发出警报。

Javascript

// Chart
var barData = {
    labels: ['Red', 'Orange', 'Yellow', 'Green']
};


var pieData = [{
    value: 40,
    color: "#ad1f27",
    highlight: "#ad474c",
    label: "Red"
}, {
    value: 40,
    color: "#c26828",
    highlight: "#c27e4d",
    label: "Orange"
}, {
    value: 10,
    color: "#c3b830",
    highlight: "#c3bc6b",
    label: "Yellow"
}, {
    value: 10,
    color: "#14773c",
    highlight: "#2da15b",
    label: "Green"
}];

var options = {
    segmentShowStroke: false
};

Chart.defaults.global.responsive = true;

var context = document.getElementById('chartDonnut').getContext('2d');
var skillsChart = new Chart(context).Doughnut(pieData, options);

$("#chartDonnut").click(function(evt) {
    var activePoints = skillsChart.getSegmentsAtEvent(evt);
    var url = activePoints[0].label + activePoints[0].value + activePoints[0].x + activePoints[0].y;
    alert(url);
});

jsfiddle

Answer 1

要访问所选字段，只需使用内部链接即可。

您需要添加修改 html 如下:

<canvas id="chartDonnut"></canvas>
<div id="red" class="redSection">
    <p>Red Section</p>
</div>
<div id="orange" class="orangeSection">
    <p>Orange Section</p>
</div>
<div id="yellow" class="yellowSection">
    <p>Yellow Section</p>
</div>
<div id="green" class="greenSection">
    <p>Green Section</p>
</div>

对于 jquery 代码，它将是这样的:

// Chart
var barData = {
    labels: ['Red', 'Orange', 'Yellow', 'Green']
};


var pieData = [{
    value: 40,
    color: "#ad1f27",
    highlight: "#ad474c",
    label: "Red"
}, {
    value: 40,
    color: "#c26828",
    highlight: "#c27e4d",
    label: "Orange"
}, {
    value: 10,
    color: "#c3b830",
    highlight: "#c3bc6b",
    label: "Yellow"
}, {
    value: 10,
    color: "#14773c",
    highlight: "#2da15b",
    label: "Green"
}];

var options = {
    segmentShowStroke: false
};

Chart.defaults.global.responsive = true;

var context = document.getElementById('chartDonnut').getContext('2d');
var skillsChart = new Chart(context).Doughnut(pieData, options);

$("#chartDonnut").click(function(evt) {
    var activePoints = skillsChart.getSegmentsAtEvent(evt);
    var url = activePoints[0].label + activePoints[0].value + activePoints[0].x + activePoints[0].y;
    if(activePoints[0].label=="Red"){
       window.location="#red";
    }
    if(activePoints[0].label=="Orange"){
       window.location="#orange";
    }
    if(activePoints[0].label=="Yellow"){
       window.location="#yellow";
    }
    if(activePoints[0].label=="Green"){
       window.location="#green";
    }
});