D3 AngularJs力有向图
D3 AngularJs Force Directed Graph
我试图创建一个力定向图，但用AngularJs编写。我已经用Angularjs编写了我的应用程序，但我不知道如何将json添加到$scope.data中，以及如何更高效地编写它。
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}
],
"links":[
{"source":1,"target":0,"value":1},
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]
}
d3.json("myGraph.json", function(error, **json**) {
if (error) throw error;
}
意思是读取myGraph.json文件，现在读取myGraph.json中json中的所有数据
现在你可以写：
$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);
}
}
您不应该在指令中加载json。您的指令有一个独立的作用域，该作用域有一个属性（数据）。
您应该在应用程序控制器中加载json，并将其传递给指令数据。之后，在您的指令中，您可以观察数据的变化，并在数据发生变化时重新绘制图形。因此，您的图指令将是可重用的，并且您可以在应用程序中使用多图。
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