使用 angular directive 和 json 数据 D3 随着标签 donut chart演示样本

使用angular resource载入中priorityData.json中间json数据，结合D3绘制甜甜圈图。执行index.html其结果见于图。：

priorityData.json中json数据例如以下：

{

   "priority":{

      "Blocker":12,

      "Critical":18,

      "Major":5,

      "Minor":30,

      "Trivial":24

   }

}

index.html代码例如以下：

<!DOCTYPE html>

<html>

<head>

  <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.10/angular.min.js"></script>

  <script src="http://cdnjs.cloudflare.com/ajax/libs/angular.js/1.2.16/angular-resource.min.js"></script>

  <script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script>

</head>

<body ng-app="myApp" ng-controller=MainCtrl>

		<li ng-repeat="(priority, val) in priorityData">

			<span >{{priority}}</span>

			<span >{{val}}</span>

		</li>

  <priority-graph data="priorityData"></priority-graph>

  <script>

var myApp = angular.module('myApp', ['ngResource']);

//define app factory

myApp.factory('DataFac',function($resource){

	return $resource('priorityData.json',{});

});

//define app controller

myApp.controller('MainCtrl',function($scope,DataFac){

	DataFac.get(function(response){

		$scope.priorityData = response.priority;

	})

});

//define app directive

myApp.directive('priorityGraph', function(){

	  function link(scope, el, attr){

          //set graph width,height and radius

		  var width=960,

		  height=500,

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

		  //set color range

		  var color=d3.scale.ordinal().range(["rgb(166,60,48)", "rgb(229,144,78)", " rgb(221,226,77)", "rgb(157,211,72)", "rgb(40,106,151)"]);

		  //set outer radius and inner radius for donut chart

		  var arc=d3.svg.arc()

		  .outerRadius(radius-80)

		  .innerRadius(radius-150);

		  //watch data change from json

	      scope.$watch('data', function(data){

	      if(!data){ return; }

	      //change json to two arrays for category and count

	      //count array

			var countArr=[];

	      //category array

			var categoryArr=[];

		  //total number of issues

	        var total=0;

			for (key in data){

				if(data.hasOwnProperty(key)){

					categoryArr.push(key);

					countArr.push(data[key]);

					total+=data[key];

				}

			}

	      //get the graph parent element

		   el = el[0];

	      // remove the graph if already exist, in case of repeat

		  d3.select( el ).select( 'svg' ).remove();

	      var pie=d3.layout.pie()

	      .sort(null)

	      .value(function(d){return d});

	      var svg=d3.select(el).append("svg")

	    		  .attr("width",width)

	    		  .attr("height",height)

	    		  .append("g")

	    		  .attr("transform","translate("+width/2+","+height/2+")");

		  var g=svg.selectAll(".arc")

		  .data(pie(countArr))

		  .enter().append("g")

		  .attr("class","arc");

		  //paint the grah

		  g.append("path")

		  .attr("d",arc)

		  .style("fill",function(d,i){return color(i);});

		  //paint the text

		  g.append("text")

		  .attr("transform",function(d){return "translate("+arc.centroid(d)+")";})

		  .attr("dy",".35em")

		  .style("text-anchor","middle")

		  .text(function(d,i){return categoryArr[i]+":"+countArr[i]});

		  //paint total number in the middle of graph

		  g.append("text")

	      .attr("dy", ".35em")

	      .style("text-anchor", "middle")

	      .text(function(d) { return total+" tickets"; });

	    }, true);

	  }

	  return {

	    link: link,

	    restrict: 'E',

	    scope: { data: '=' }

	  };

	});

  </script>

</body>

</html>

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使用 angular directive 和 json 数据 D3 随着标签 donut chart演示样本

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