如何添加到chart.js(Donut Charts)的链接?

时间:2015-06-17 18:34:47

标签: javascript hyperlink chart.js

我想添加指向甜甜圈图表的链接,以便能够向用户发送包含由点击选项过滤的记录的页面。

例如here,如果用户点击"绿色",我想将用户发送到一个页面,该页面将显示所有"绿色"记录。

我没有找到一个简单的方法来做到这一点,并尝试过这样的工作尚未完成:

(我添加了一个属性"过滤"使用" id"我需要对其进行过滤)

var data = [
  {
    value: 300,
    color:"#F7464A",
    highlight: "#FF5A5E",
    label: "Red",
    filter: 1
  },
  {
    value: 50,
    color: "#46BFBD",
    highlight: "#5AD3D1",
    label: "Green",
    filter: 2
  },
  {
    value: 100,
    color: "#FDB45C",
    highlight: "#FFC870",
    label: "Yellow",
    filter: 3
  }
]

$(document).ready(
    function () {
        $("#chart").click(
            function(evt){
                var activePoints = chart.getSegmentsAtEvent(evt);
                var url = "http://example.com/?grid[f][collor][]=" + activePoints[0].filter
                alert(url);
            }
        );
    }
);

我无法获得属性" filter"使用" activePoints [0] .filter"

谢谢。

2 个答案:

答案 0 :(得分:3)

在JSON中添加自定义属性是v2(https://github.com/nnnick/Chart.js/issues/1185)路线图中的一项功能。就目前而言,您可以在javascript中添加属性,如下所示:

var segments = chart.segments;
for (var i = 0; i < segments.length; i++) {
  segments[i].filter = i+1;
}

这是一个在url(http://jsfiddle.net/tcy74pcc/1/)中加载了filter / id属性的jsfiddle:

如果你想用一个基于点而不是段的图表来做这个,这里有一个类似线条解决方案的帖子: Displaying custom dataset properties in tooltip in chart.js

希望有所帮助。祝你好运!

答案 1 :(得分:2)

现在不推荐使用getSegmentsAtEvent。改为使用getElementsAtEvent。

这里有完整的功能,并为每个片段添加动态颜色。

    var piChart = function (ctx, labelName, labels, values, filters) {
        var colors = dynamicColors(values.length)

        var data = {
            labels: labels,
            datasets: [
                {
                    label: labelName,
                    backgroundColor: colors.backColors,
                    hoverBackgroundColor: colors.highColors,
                    borderColor: colors.borders,
                    hoverBorderColor: colors.borders,
                    borderWidth: 1,
                    data: values
                }
            ]
        };

        var pieChart = new Chart(ctx, {
            type: "pie",
            data: data
        });


        if (filters != null) {
            ctx.click(
               function (evt) {
                   var activePoints = pieChart.getElementAtEvent(evt);
                   if (activePoints.length > 0) {
                       var index = activePoints[0]["_index"];
                       location.href = filters[index];
                   }
               });
        }
    }

    var dynamicColors = function (count) {
        var backColors = [];
        var highColors = [];
        var borders = [];

        for (var i = 0; i < count; i++) {
            var r = Math.floor(Math.random() * 255);
            var g = Math.floor(Math.random() * 255);
            var b = Math.floor(Math.random() * 255);
            var backColor = "rgba(" + r + "," + g + "," + b + ", 0.4)";
            var highColor = "rgba(" + r + "," + g + "," + b + ", 0.8)";
            var border = "rgba(" + r + "," + g + "," + b + ", 1)";

            backColors.push(backColor);
            highColors.push(highColor);
            borders.push(border);
        }