这段代码是我的项目的一部分，我正在尝试在其中创建强制布局图。节点之间的所有链接都应该有一个标记，我可以通过defs模式将其标记为标记。
在这段代码中，我希望在defs中看到已定义的标记，在该标记中我已通过url(#id)对其进行了调用，但是在没有错误的情况下我看不到它。它在以前工作过，但是突然所有的defs在我的代码中被禁用了。
在这里，您将看到结果svg：
<!DOCTYPE html>
<meta charset="utf-8">
<style>
body {
font: 10px sans-serif;
shape-rendering: crispEdges;
}
.link.flow {
opacity: 1!important;
/*stroke-width: 1.5px;*/
}
#licensing {
fill: green;
}
.link.flow.licensing {
stroke: green;
}
.link.flow.resolved {
stroke-dasharray: 0,2 1;
}
circle.flow {
fill: #ff2575;
stroke: #ff2575;
/*stroke-width: 1.5px;*/
}
text.flow {
font: 10px sans-serif;
pointer-events: none;
text-shadow: 0 1px 0 #fff, 1px 0 0 #fff, 0 -1px 0 #fff, -1px 0 0 #fff;
}
path.link.flow {
fill: none;
stroke: blue;
}
</style>
<body>
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
<script>
var maxWeight = 0;
var maxSize = 0;
// new graph: start
var margin = 10;
var width = 455,
height = 350;
var svgMaster = d3.select("body").append("svg") // initiate svg
.attr("id","flow")
.attr("width", width)
.attr("height", height)
.style("margin-right",margin+"px")
.style("margin-left",margin+"px");
var svg = svgMaster.append('svg:g')
.attr('id','groupFlow');
var link = svg.selectAll(".link"),
node = svg.selectAll(".node"); // nodes and links
// :end new graph
var jsonData = {
"nodes": [
{"username": "S_Christophorus", "social_net_id": "55641120cdfa6618acdd1952", "last_name":
"Christophorus", "first_name": "Stanly", "avatar": "/media/avatars/C02.png", "person_id": "556431f3cdfa661108325774"
, "id": "55641120cdfa6618acdd1a8e"},
{"username": "A_Field", "social_net_id": "55641120cdfa6618acdd1952"
, "last_name": "Field", "first_name": "Abdul", "avatar": "/media/avatars/B01.png", "person_id": "556431f3cdfa6611083257f6"
, "id": "55641120cdfa6618acdd1b94"},
{"username": "B_Hugh", "social_net_id": "55641120cdfa6618acdd1952"
, "last_name": "Hugh", "first_name": "Beale", "avatar": "/media/avatars/B02.png", "person_id": "556431f3cdfa6611083257f7"
, "id": "55641120cdfa6618acdd1b96"},
{"username": "M_Kennedy", "social_net_id": "55641120cdfa6618acdd1952"
, "last_name": "Kennedy", "first_name": "Mordy", "avatar": "/media/avatars/B05.png", "person_id": "556431facdfa661108327e21"
, "id": "55641128cdfa6618acdd9fed"}
],
"edges": [
{"source": 0, "target": 1, "weight": 1.5},
{"source": 2, "target": 0, "weight": 46.5},
{"source": 0, "target": 2, "weight": 6.0},
{"source": 2, "target": 1, "weight": 1.5},
{"source": 2, "target": 3, "weight": 3.0}
]
}
/*
* refresh graph based on given data
*/
var refreshForceFlow = function(json){
clearGraphFlow();
var maxWeight = 0;
for(var edgeIndex = 0; edgeIndex < json.edges.length; edgeIndex++){
if(json.edges[edgeIndex].weight > maxWeight) maxWeight = json.edges[edgeIndex];
}
console.log(json);
var force = d3.layout.force()
.nodes(d3.values(json.nodes))
.links(json.edges)
.size([width, height])
.linkDistance(60)
.charge(-300)
.on("tick", tickFlow)
.start();
// Per-type markers, as they don't inherit styles.
svg.append("defs").selectAll("marker")
.data(json.edges)
.enter().append("marker")
.attr("id", function(d) { return ("weight_"+d.weight).replace(".","_"); })
.attr("viewBox", "0 -5 10 10")
.attr("refX", 13) // 15
.attr("refY", 0) // -1.5
.attr("markerWidth", 6)
.attr("markerHeight", 6)
.attr("orient", "auto")
.append("path")
.style("fill", function(d){
var color = 'FF';
var c = Math.floor((d.weight*99)/maxWeight);
c = 100 - c;
if( c < 10) c = '0'+c;
color = c + color;
color = c + color;
//console.log('#'+color);
return '#'+color;
})
.style("stroke", function(d){
var color = 'FF';
var c = Math.floor((d.weight*99)/maxWeight);
c = 100 - c;
if( c < 10) c = '0'+c;
color = c + color;
color = c + color;
//console.log('#'+color);
return '#'+color;
})
.style("stroke-width", "1px")
.attr("d", "M0,-5L10,0L0,5");
var path = svg.append("g").selectAll("path")
.data(force.links())
.enter().append("path")
.attr("class", function(d) { return "link flow "; })
.style("stroke-width", function(d) {
var res = 1 + ((d.weight * 2.5) / maxWeight);
return res + 'px';
})
.style("stroke", function(d){
var color = 'FF';
var c = Math.floor((d.weight*99)/maxWeight);
c = 100 - c;
if( c < 10) c = '0'+c;
color = c + color;
color = c + color;
//console.log('#'+color);
return '#'+color;
})
.attr("marker-end", function(d) { return "url(#" + ("weight_"+d.weight).replace(".","_") + ")"; });
var circle = svg.append("g").selectAll("circle")
.data(force.nodes())
.enter().append("circle")
.attr("r", 6)
.attr("class", "flow")
.call(force.drag);
var text = svg.append("g").selectAll("text")
.data(force.nodes())
.enter().append("text")
.attr("class", "flow")
.attr("x", 8)
.attr("y", ".31em")
.text(function(d) { return d.username; });
// Use elliptical arc path segments to doubly-encode directionality.
function tickFlow() {
path.attr("d", linkArc);
circle.attr("transform", transform);
text.attr("transform", transform);
}
function linkArc(d) {
var tx = d.target.x - 0;
var ty = d.target.y - 0;
var sx = d.source.x - 0;
var sy = d.source.y - 0;
var dx = tx - sx,
dy = ty - sy,
dr = Math.sqrt(dx * dx + dy * dy);
return "M" + d.source.x + "," + d.source.y + "A" + dr + "," + dr + " 0 0,1 " + d.target.x + "," + d.target.y;
}
function transform(d) {
return "translate(" + d.x + "," + d.y + ")";
}
}; // end of function
/*
* clear gragh
*/
var clearGraphFlow = function(){
svg.selectAll("g").remove();
svg.selectAll("defs").remove();
};
refreshForceFlow(jsonData);
</script>最佳答案
我在上一个答案中指出的问题是refs问题的原因，但是在整个代码中也存在其他问题。请在下面查看更正的代码...
//debug panel///////////////////////////////////////////////////////////////////////////////////////////
var update = d3.select("#update")
.on("click", (function() {
var dataSet = false;
return function() {
refreshForceFlow(JSON.parse(JSON.stringify(jsonData[(dataSet = !dataSet, +dataSet)])))
}
})());
////////////////////////////////////////////////////////////////////////////////////////////////////////
var maxWeight = 0;
var maxSize = 0;
// new graph: start
var margin = 10;
var width = 500,
height = 150;
var svgMaster = d3.select("body").append("svg") // initiate svg
.attr("id", "flow")
.attr("width", width)
.attr("height", height)
.style("margin-right", margin + "px")
.style("margin-left", margin + "px");
var svg = svgMaster.append('svg:g')
.attr('id', 'groupFlow');
var link = svg.selectAll(".link"),
node = svg.selectAll(".node"); // nodes and links
// :end new graph
var jsonData = [{
"nodes": [{
"username": "S_Christophorus",
"social_net_id": "55641120cdfa6618acdd1952",
"last_name": "Christophorus",
"first_name": "Stanly",
"avatar": "/media/avatars/C02.png",
"person_id": "556431f3cdfa661108325774",
"id": "55641120cdfa6618acdd1a8e"
}, {
"username": "A_Field",
"social_net_id": "55641120cdfa6618acdd1952",
"last_name": "Field",
"first_name": "Abdul",
"avatar": "/media/avatars/B01.png",
"person_id": "556431f3cdfa6611083257f6",
"id": "55641120cdfa6618acdd1b94"
}, {
"username": "B_Hugh",
"social_net_id": "55641120cdfa6618acdd1952",
"last_name": "Hugh",
"first_name": "Beale",
"avatar": "/media/avatars/B02.png",
"person_id": "556431f3cdfa6611083257f7",
"id": "55641120cdfa6618acdd1b96"
}, {
"username": "M_Kennedy",
"social_net_id": "55641120cdfa6618acdd1952",
"last_name": "Kennedy",
"first_name": "Mordy",
"avatar": "/media/avatars/B05.png",
"person_id": "556431facdfa661108327e21",
"id": "55641128cdfa6618acdd9fed"
}],
"edges": [{
"source": "0",
"target": "1",
"weight": 1.5
}, {
"source": "2",
"target": "0",
"weight": 46.5
}, {
"source": "0",
"target": "2",
"weight": 6.0
}, {
"source": "2",
"target": "1",
"weight": 1.5
}, {
"source": "2",
"target": "3",
"weight": 3.0
}]
}, {
"nodes": [{
"username": "A_Field",
"social_net_id": "55641120cdfa6618acdd1952",
"last_name": "Christophorus",
"first_name": "Stanly",
"avatar": "/media/avatars/C02.png",
"person_id": "556431f3cdfa661108325774",
"id": "55641120cdfa6618acdd1a8e"
}, {
"username": "B_Hugh",
"social_net_id": "55641120cdfa6618acdd1952",
"last_name": "Field",
"first_name": "Abdul",
"avatar": "/media/avatars/B01.png",
"person_id": "556431f3cdfa6611083257f6",
"id": "55641120cdfa6618acdd1b94"
}, {
"username": "M_Kennedy",
"social_net_id": "55641120cdfa6618acdd1952",
"last_name": "Hugh",
"first_name": "Beale",
"avatar": "/media/avatars/B02.png",
"person_id": "556431f3cdfa6611083257f7",
"id": "55641120cdfa6618acdd1b96"
}],
"edges": [{
"source": "0",
"target": "1",
"weight": 1.5
}, {
"source": "2",
"target": "0",
"weight": 26.5
}, {
"source": "0",
"target": "2",
"weight": 16.0
}, {
"source": "2",
"target": "1",
"weight": 1.5
}]
}];
/*
* refresh graph based on given data
*/
var refreshForceFlow = (function() {
// Need to use a single instance of force because of
// this bug https://github.com/mbostock/d3/issues/2468
// hence the closure...
var force = d3.layout.force()
.size([width, height])
.linkDistance(60)
.charge(-300)
return function(json) {
// clearGraphFlow(); ***d3 does this for you if you do it right***
// var maxWeight = 0;
//***this code is already written for you: you just need to wire it up***
// for(var edgeIndex = 0; edgeIndex < json.edges.length; edgeIndex++){
// if(json.edges[edgeIndex].weight > maxWeight) maxWeight = json.edges[edgeIndex];
// }
var maxWeight = d3.max(json.edges, function(d) {
return d.weight
});
//clean up the data: force needs type Number on link.source/destination
json.edges.forEach(function(d) {
d.source = +d.source;
d.target = +d.target
});
console.log(json);
force
.nodes(json.nodes) //***don't need to wrap in d3.value***
.links(json.edges)
.on("tick", tickFlow)
.start();
// Per-type markers, as they don't inherit styles.
// UPDATE
var defs = svg.selectAll("defs").data([json.edges]);
// EXIT
defs.exit().remove();
// ENTER
defs.enter().append("defs");
// UPDATE+ENTER for defs
// UPDATE for markers
var markers = defs.selectAll("marker")
.data(function(d) {
return d
}); //get the data elements from the defs datum
//ENTER
markers.enter().append("marker") //new markers only
.attr("viewBox", "0 -5 10 10")
.attr("refX", 13) // 15
.attr("refY", 0) // -1.5
.attr("markerWidth", 6)
.attr("markerHeight", 6)
.attr("orient", "auto")
.append("path");
// UPDATE+ENTER
markers.attr("id", function(d) {
return ("weight_" + d.weight).replace(".", "_");
})
.select("path")
.style("fill", function(d) {
var color = 'FF';
var c = Math.floor((d.weight * 99) / maxWeight);
c = 100 - c;
if (c < 10) c = '0' + c;
color = c + color;
color = c + color;
//console.log('#'+color);
return '#' + color;
})
.style("stroke", function(d) {
var color = 'FF';
var c = Math.floor((d.weight * 99) / maxWeight);
c = 100 - c;
if (c < 10) c = '0' + c;
color = c + color;
color = c + color;
//console.log('#'+color);
return '#' + color;
})
.style("stroke-width", "1px")
.attr("d", "M0,-5L10,0L0,5");
// EXIT
markers.exit().remove();
var link = svg.selectAll("g.link").data(force.links());
link.enter().insert("g", ".link").attr("class", "link")
.append("path")
.attr("class", "link flow"); //***don't need a function for constant value***;
link.exit().remove();
path = link.select("path")
.style("stroke-width", function(d) {
var res = 1 + ((d.weight * 2.5) / maxWeight);
return Math.round(res) + 'px';
})
.style("stroke", function(d) {
var color = 'FF';
var c = Math.floor((d.weight * 99) / maxWeight);
c = 100 - c;
if (c < 10) c = '0' + c;
color = c + color;
color = c + color;
//console.log('#'+color);
return '#' + color;
})
.attr("marker-end", function(d) {
return "url(#" + ("weight_" + d.weight).replace(".", "_") + ")";
});
var node = svg.selectAll("g.node")
.data(force.nodes()), //node is the node container: includes circle and text
nodeEnter = node.enter().append("g").call(force.drag),
//append the circle and the text inside the node g
//ENTER
circle = nodeEnter.attr("class", "node")
.append("circle")
.attr("r", 6)
.attr("class", "flow"),
// .on("contextmenu", d3.contextMenu(menu)),
text = nodeEnter.append("text")
.attr("class", "flow")
.attr("x", 8)
.attr("y", ".31em")
.style({
"pointer-events": "all",
cursor: "default"
}) //***include dragging by text***
//ENTER+UPDATE
text.text(function(d) {
return d.username;
});
// EXIT
node.exit().remove();
// Use elliptical arc path segments to doubly-encode directionality.
function tickFlow(e) {
path.attr("d", linkArc);
node.attr("transform", transform); //circle and text is wrapped by node
}
function linkArc(d) {
var tx = d.target.x - 0;
var ty = d.target.y - 0;
var sx = d.source.x - 0;
var sy = d.source.y - 0;
var dx = tx - sx,
dy = ty - sy,
dr = Math.sqrt(dx * dx + dy * dy);
return "M" + d.source.x + "," + d.source.y + "A" + dr + "," + dr + " 0 0,1 " + d.target.x + "," + d.target.y;
}
function transform(d) {
return "translate(" + d.x + "," + d.y + ")";
}
}; // end of function
})();
/*
* clear gragh
*/
// var clearGraphFlow = function(){ // ***Not required***
// svg.selectAll("g").remove();
// svg.selectAll("defs").remove();
// };
refreshForceFlow(JSON.parse(JSON.stringify(jsonData[0])));body {
font: 10px sans-serif;
shape-rendering: crispEdges;
}
svg {
outline: 1px solid red;
overflow: visible;
}
.link.flow {
opacity: 1!important;
/*stroke-width: 1.5px;*/
}
#licensing {
fill: green;
}
.link.flow.licensing {
stroke: green;
}
.link.flow.resolved {
stroke-dasharray: 0, 2 1;
}
circle.flow {
fill: #ff2575;
stroke: #ff2575;
stroke-width: 1.5px;
}
text.flow {
font: 10px sans-serif;
pointer-events: none;
text-shadow: 0 1px 0 #fff, 1px 0 0 #fff, 0 -1px 0 #fff, -1px 0 0 #fff;
}
path.link.flow {
fill: none;
stroke: blue;
}
div#panel {
display: block;
}
input {
margin: 10px;
}<div id="panel">
<input id="update" type="button" value="update">
</div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>关于javascript - D3.js defs和url()不起作用，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/31317837/