在甜甜圈中插入图像

时间:2018-08-17 19:44:31

标签: javascript d3.js svg

我已经使用D3js制作了各种甜甜圈图,我需要在甜甜圈中插入一个相同的图像,但是我不知道实现此目的的方法。谁能帮我这个?这是我的JS代码:

var data1 = [4,96];
var data2 = [1,99];
var data3 = [16,84];
var data4 = [12,88];
var data5 = [29,71];
var data6 = [15,85];
var data7 = [12,88];
var data8 = [10,90];

/* Reusable Drawing donut function*/

var width = 300,
    height = 300,
    radius = (Math.min(width, height) / 2) - 100;

function drawDonut(dataa,divchart){
    var sym = "%"

    var color = ["#00338D","#BC204B"];

    var pie = d3.pie()
        .value(function(d) { return d })(dataa);

    var arc = d3.arc()
        .outerRadius(radius - 10)
        .innerRadius(radius - (radius/1.9));

    var labelArc = d3.arc()
        .outerRadius(radius - 31)
        .innerRadius(radius - 31);

    var svg = d3.select(divchart)
        .append("svg")
        .attr("width", width)
        .attr("height", height)
            .append("g")
            .attr("transform", "translate(" +60 + "," + 60 +")");

    var g = svg.selectAll("arc")
        .data(pie)
        .enter().append("g")
        .attr("class", "arc");

    g.append("path")
        .attr("d", arc)
        .data(color)
        .style("fill", function(d){return d});
    }

drawDonut(data1,"#pie1")
drawDonut(data2,"#pie2")
drawDonut(data3,"#pie3")
drawDonut(data4,"#pie4")
drawDonut(data5,"#pie5")
drawDonut(data6,"#pie6")
drawDonut(data7,"#pie7")
drawDonut(data8,"#pie8")

我要插入的图像是一个svg,这是代码:

<g>
    <path class="st0" d="M15.6,10.9c1.3,0,2.4-1.2,2.4-2.7c0-1.5-1.1-2.7-2.4-2.7c-1.3,0-2.4,1.2-2.4,2.7C13.2,9.7,14.2,10.9,15.6,10.9
        L15.6,10.9z"/>
    <path class="st0" d="M18.6,11.6h-1.2l-1.8,5.5l-1.8-5.5h-1.2c-1.3,0-2.4,1.2-2.4,2.7v13h2.4l1.2,16.4h3.6l1.2-16.4H21v-13
        C21,12.8,19.9,11.6,18.6,11.6L18.6,11.6z"/>
    <path class="st0" d="M31.9,10.9c1.3,0,2.4-1.2,2.4-2.7c0-1.5-1.1-2.7-2.4-2.7c-1.3,0-2.4,1.2-2.4,2.7C29.5,9.7,30.6,10.9,31.9,10.9
        L31.9,10.9z"/>
    <path class="st0" d="M39.8,25.2l-3.6-11.6c0,0-0.6-2-2.4-2h-3.6c-1.8,0-2.4,2-2.4,2l-3.6,11.6l1.2,0.7l4.2-9.5l-3.6,14.3h3.6
        l1.2,13h2.4l1.2-13H38l-3.6-14.3l4.2,9.5L39.8,25.2L39.8,25.2z"/>
</g>

请问我能帮助decifer如何在甜甜圈图的孔中插入图像吗?谢谢

1 个答案:

答案 0 :(得分:1)

您可以将每个d属性存储为一个单独的常量,并使用与父级相同的组选择将这些路径分别附加在drawDonut函数内部。

但是,一个更简单的解决方案是将所有内容保存为单个字符串...

var myGroup = '<g><path class="st0" d="M15.6,10.9c1.3,0,2.4-1.2,2.4-2.7c0-1.5-1.1-
    -2.7c-1.3,0-2.4,1.2-2.4,2.7...etc...-14.3l4.2,9.5L39.8,25.2L39.8,25.2z"/></g>';

....并使用html方法将其附加:

g.append("g").html(myGroup);

注意事项:html()方法在内部使用innerHTML。在旧版浏览器中,这不适用于SVG元素。据阿米莉亚·贝拉米·罗伊兹(Amelia Bellamy-Royds)在她的《 Using SVG with CCS3 and HTML5 (2018)》中:

  

最新版本的Web浏览器甚至在SVG元素上支持innerHTML,但这是核心DOM规范的最新内容。

为避免在另一个组内形成不必要的组,您还可以删除字符串中的<g></g>

这是演示:

var myGroup = '<g><path class="st0" d="M15.6,10.9c1.3,0,2.4-1.2,2.4-2.7c0-1.5-1.1-2.7-2.4-2.7c-1.3,0-2.4,1.2-2.4,2.7C13.2,9.7,14.2,10.9,15.6,10.9L15.6,10.9z"/><path class="st0" d="M18.6,11.6h-1.2l-1.8,5.5l-1.8-5.5h-1.2c-1.3,0-2.4,1.2-2.4,2.7v13h2.4l1.2,16.4h3.6l1.2-16.4H21v-13C21,12.8,19.9,11.6,18.6,11.6L18.6,11.6z"/><path class="st0" d="M31.9,10.9c1.3,0,2.4-1.2,2.4-2.7c0-1.5-1.1-2.7-2.4-2.7c-1.3,0-2.4,1.2-2.4,2.7C29.5,9.7,30.6,10.9,31.9,10.9L31.9,10.9z"/><path class="st0" d="M39.8,25.2l-3.6-11.6c0,0-0.6-2-2.4-2h-3.6c-1.8,0-2.4,2-2.4,2l-3.6,11.6l1.2,0.7l4.2-9.5l-3.6,14.3h3.6l1.2,13h2.4l1.2-13H38l-3.6-14.3l4.2,9.5L39.8,25.2L39.8,25.2z"/></g>';

var data1 = [4, 96];
var data2 = [1, 99];
var data3 = [16, 84];
var data4 = [12, 88];
var data5 = [29, 71];
var data6 = [15, 85];
var data7 = [12, 88];
var data8 = [10, 90];

/* Reusable Drawing donut function*/

var width = 100,
  height = 100,
  radius = (Math.min(width, height) / 2);

function drawDonut(dataa, divchart) {
  var sym = "%"

  var color = ["#00338D", "#BC204B"];

  var pie = d3.pie()
    .value(function(d) {
      return d
    })(dataa);

  var arc = d3.arc()
    .outerRadius(radius - 10)
    .innerRadius(radius - (radius / 1.9));

  var labelArc = d3.arc()
    .outerRadius(radius - 31)
    .innerRadius(radius - 31);

  var svg = d3.select(divchart)
    .append("svg")
    .attr("width", width)
    .attr("height", height)
    .append("g")
    .attr("transform", "translate(" + 50 + "," + 50 + ")");

  var g = svg.selectAll("arc")
    .data(pie)
    .enter().append("g")
    .attr("class", "arc");

  g.append("path")
    .attr("d", arc)
    .data(color)
    .style("fill", function(d) {
      return d
    });

  g.append("g")
    .attr("transform", "translate(-15,-15) scale(0.6)")
    .html(myGroup);

}

drawDonut(data1, "#pie1")
drawDonut(data2, "#pie2")
drawDonut(data3, "#pie3")
drawDonut(data4, "#pie4")
drawDonut(data5, "#pie5")
drawDonut(data6, "#pie6")
drawDonut(data7, "#pie7")
drawDonut(data8, "#pie8")
div {
  display: inline;
}
<script src="https://d3js.org/d3.v5.min.js"></script>
<div id="pie1"></div>
<div id="pie2"></div>
<div id="pie3"></div>
<div id="pie4"></div>
<div id="pie5"></div>
<div id="pie6"></div>
<div id="pie7"></div>
<div id="pie1"></div>
<div id="pie8"></div>

PS:变换中有一些魔术数字。您可以通过计算组的大小和初始绘制点来避免它们。