D3 AngularJs力導向圖

Question

我正在嘗試創建一個力導向圖，但是用AngularJs編寫。我已經在Angularjs中編寫了我的應用程序，但我不知道如何將我的json添加到$ scope.data中，並且無論如何要更有效地編寫它。

var app = angular.module("chartApp", []); 
app.directive('graph', function() { 
    var graphLink = function(scope, element) { 
     var width = 960, 
      height = 500; 

     var color = d3.scale.category20(); 

     var force = d3.layout.force() 
      .charge(-120) 
      .linkDistance(30) 
      .size([width, height]); 

     var svg = d3.select(element[0]).append("svg") // attach d3 to directive element 
      .attr("width", width) 
      .attr("height", height); 

     d3.json("js/miserables", function(error, graph) { 
      if (error) throw error; 

      force 
       .nodes(graph.nodes) 
       .links(graph.links) 
       .start(); 

      var link = svg.selectAll(".link") // there might be a more angular way to do this... 
       .data(graph.links) 
       .enter().append("line") 
       .attr("class", "link") 
       .style("stroke-width", function (d) { 
        return Math.sqrt(d.value); 
       }); 

      var node = svg.selectAll(".node") 
       .data(graph.nodes) 
       .enter().append("circle") 
       .attr("class", "node") 
       .attr("r", 5) 
       .style("fill", function (d) { 
        return color(d.group); 
       }) 
       .call(force.drag); 

      node.append("title") 
       .text(function (d) { 
        return d.name; 
       }); 

      force.on("tick", function() { 
       link.attr("x1", function (d) { 
        return d.source.x; 
       }) 
        .attr("y1", function (d) { 
         return d.source.y; 
        }) 
        .attr("x2", function (d) { 
         return d.target.x; 
        }) 
        .attr("y2", function (d) { 
         return d.target.y; 
        }); 

       node.attr("cx", function (d) { 
        return d.x; 
       }) 
        .attr("cy", function (d) { 
         return d.y; 
        }); 
      }); 

      return { 
       link: graphLink, // pass in your link function here 
       scope: { 
        data: '=' // pass in your data as an attribute 
           // this makes this reusable, and you can redraw if the data changes 
       } 
      }; 
     })}}); 

JSON

{ 
"nodes":[ 
{"name":"Myriel","group":1}, 
{"name":"Napoleon","group":1}, 
{"name":"Mlle.Baptistine","group":1}, 
{"name":"Mme.Magloire","group":1}, 
{"name":"CountessdeLo","group":1}, 
{"name":"Geborand","group":1}, 
{"name":"Champtercier","group":1}, 
{"name":"Cravatte","group":1}, 
{"name":"Count","group":1}, 
{"name":"OldMan","group":1}, 
{"name":"Labarre","group":2}, 
{"name":"Valjean","group":2}, 
{"name":"Marguerite","group":3}, 
{"name":"Mme.deR","group":2}, 
{"name":"Isabeau","group":2}, 
{"name":"Gervais","group":2}, 
{"name":"Tholomyes","group":3}, 
{"name":"Listolier","group":3}, 
{"name":"Fameuil","group":3}, 
{"name":"Blacheville","group":3}, 
{"name":"Favourite","group":3}, 
{"name":"Dahlia","group":3}, 
{"name":"Zephine","group":3}, 
{"name":"Fantine","group":3}, 
{"name":"Mme.Thenardier","group":4}, 
{"name":"Thenardier","group":4}, 
{"name":"Cosette","group":5}, 
{"name":"Javert","group":4}, 
{"name":"Fauchelevent","group":0}, 
{"name":"Bamatabois","group":2}, 
{"name":"Perpetue","group":3}, 
{"name":"Simplice","group":2}, 
{"name":"Scaufflaire","group":2}, 
{"name":"Woman1","group":2}, 
{"name":"Judge","group":2}, 
{"name":"Champmathieu","group":2}, 
{"name":"Brevet","group":2}, 
{"name":"Chenildieu","group":2}, 
{"name":"Cochepaille","group":2}, 
{"name":"Pontmercy","group":4}, 
{"name":"Boulatruelle","group":6}, 
{"name":"Eponine","group":4}, 
{"name":"Anzelma","group":4}, 
{"name":"Woman2","group":5}, 
{"name":"MotherInnocent","group":0}, 
{"name":"Gribier","group":0}, 
{"name":"Jondrette","group":7}, 
{"name":"Mme.Burgon","group":7}, 
{"name":"Gavroche","group":8}, 
{"name":"Gillenormand","group":5}, 
{"name":"Magnon","group":5}, 
{"name":"Mlle.Gillenormand","group":5}, 
{"name":"Mme.Pontmercy","group":5}, 
{"name":"Mlle.Vaubois","group":5}, 
{"name":"Lt.Gillenormand","group":5}, 
{"name":"Marius","group":8}, 
{"name":"BaronessT","group":5}, 
{"name":"Mabeuf","group":8}, 
{"name":"Enjolras","group":8}, 
{"name":"Combeferre","group":8}, 
{"name":"Prouvaire","group":8}, 
{"name":"Feuilly","group":8}, 
{"name":"Courfeyrac","group":8}, 
{"name":"Bahorel","group":8}, 
{"name":"Bossuet","group":8}, 
{"name":"Joly","group":8}, 
{"name":"Grantaire","group":8}, 
{"name":"MotherPlutarch","group":9}, 
{"name":"Gueulemer","group":4}, 
{"name":"Babet","group":4}, 
{"name":"Claquesous","group":4}, 
{"name":"Montparnasse","group":4}, 
{"name":"Toussaint","group":5}, 
{"name":"Child1","group":10}, 
{"name":"Child2","group":10}, 
{"name":"Brujon","group":4}, 
{"name":"Mme.Hucheloup","group":8} 
], 
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] 
} 

Answer 1

d3.json("myGraph.json", function(error, **json**) { 
    if (error) throw error; 
} 

手段讀取文件myGraph.json，現在從myGraph.json在JSON的所有數據現在你

可以寫：

$scope.data = null; 
//you should initialize variable before your function! 
var graphLink = function(scope, element) { 
    d3.json("myGraph.json", function(error, **json**) { 
     if (error) throw error; 
     $scope.data = json; 
     console.log($scope.data); 
    } 
} 

Answer 2

你不應該在指令中加載你的json。您的指令具有隔離範圍，並且該範圍具有屬性（數據）。

您應該在應用程序控制器中加載您的json並將其傳遞給您的指令數據。之後，在您的指令中，您可以觀察數據更改並在數據更改時重新繪製圖形。因此，您的圖形指令將是可重用的，並且您的應用程序中可以有多個圖形。