labels wont show up on d3 force diagram - javascript

I am a beginner at d3. One of the diagrams I find particularly helpful and fun is the d3 force diagram. I've been playing around with it, but for some reason I've had a lot of trouble with this particular data set. Specifically, I've been trying forever to get the labels to show up on my d3 force diagram, but it just won't work. Here is my code:
<!DOCTYPE html>
<meta charset="utf-8">
<style>
.links line {
stroke: #999;
stroke-opacity: 0.6;
}
.nodes circle {
stroke: #fff;
stroke-width: 1.5px;
}
.node text {
pointer-events: none;
font: 10px sans-serif;
}
</style>
<svg width="960" height="600"></svg>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script>
var svg = d3.select("svg"),
width = +svg.attr("width"),
height = +svg.attr("height");
var color = d3.scaleOrdinal(d3.schemeCategory20);
var simulation = d3.forceSimulation()
.force("link", d3.forceLink().id(function(d) { return d.id; }))
.force("charge", d3.forceManyBody())
.force("center", d3.forceCenter(width / 2, height / 2));
d3.json("links.json", function(error, graph) {
if (error) throw error;
var link = svg.append("g")
.attr("class", "links")
.selectAll("line")
.data(graph.links)
.enter().append("line")
.attr("stroke-width", function(d) { return 1});
var node = svg.append("g")
.attr("class", "nodes")
.selectAll("circle")
.data(graph.nodes)
.enter().append("circle")
.attr("r", function(d){
return 3*d.size;
})
.attr("fill", function(d) { return color(d.id); })
.call(d3.drag()
.on("start", dragstarted)
.on("drag", dragged)
.on("end", dragended));
node.append("svg:title")
.attr("dx", 12)
.attr("dy", ".35em")
.text(function(d) { return d.id });
simulation
.nodes(graph.nodes)
.on("tick", ticked);
simulation.force("link")
.links(graph.links);
function ticked() {
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; });
}
});
function dragstarted(d) {
if (!d3.event.active) simulation.alphaTarget(0.3).restart();
d.fx = d.x;
d.fy = d.y;
}
function dragged(d) {
d.fx = d3.event.x;
d.fy = d3.event.y;
}
function dragended(d) {
if (!d3.event.active) simulation.alphaTarget(0);
d.fx = null;
d.fy = null;
}
</script>
thanks so much for your help
edit: here is my links.json
{
"nodes": [
{"id": "AK","size": "1.414213562"},
{"id": "AL","size": "1.414213562"},
{"id": "AR","size": "1.414213562"},
{"id": "AZ","size": "2.828427125"}],
"links": [
{"source": "ABC","target": "CO","value": "A"},
{"source": "ABC","target": "CO","value": "A"},
{"source": "ABC","target": "CO","value": "A"},
{"source": "ABC","target": "FL","value": "A"}
}

Added Edit below :
var svg = d3.select("svg"),
width = +svg.attr("width"),
height = +svg.attr("height");
var color = d3.scaleOrdinal(d3.schemeCategory20);
var simulation = d3.forceSimulation()
.force("link", d3.forceLink().id(function(d) { return d.id; }))
.force("charge", d3.forceManyBody())
.force("center", d3.forceCenter(width / 2, height / 2));
graph = {
"nodes": [
{"id": "AK","size": "1.414213562"},
{"id": "AL","size": "1.414213562"},
{"id": "AR","size": "1.414213562"},
{"id": "AZ","size": "2.828427125"}],
"links": [
{"source": "AK","target": "AL","value": "A"},
{"source": "AL","target": "AZ","value": "A"},
{"source": "AL","target": "AR","value": "A"},
{"source": "AZ","target": "AR","value": "A"}]
};
var link = svg.append("g")
.attr("class", "links")
.selectAll("line")
.data(graph.links)
.enter().append("line")
.attr("stroke-width", function(d) { return 1});
var node = svg.append("g")
.attr("class", "nodes")
.selectAll("circle")
.data(graph.nodes)
.enter().append("circle")
.attr("r", function(d){
return 5;
})
.attr("fill", function(d) { return color(d.id); })
.call(d3.drag()
.on("start", dragstarted)
.on("drag", dragged)
.on("end", dragended));
node.append("svg:title")
.attr("dx", 12)
.attr("dy", ".35em")
.text(function(d) { return d.id });
var labels = svg.append("g")
.attr("class", "label")
.selectAll("text")
.data(graph.nodes)
.enter().append("text")
.attr("dx", 6)
.attr("dy", ".35em")
.style("font-size",10)
.text(function(d) { return d.id });
simulation
.nodes(graph.nodes)
.on("tick", ticked);
simulation.force("link")
.links(graph.links);
function ticked() {
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; });
labels
.attr("x", function(d) { return d.x; })
.attr("y", function(d) { return d.y; });
}
function dragstarted(d) {
if (!d3.event.active) simulation.alphaTarget(0.3).restart();
d.fx = d.x;
d.fy = d.y;
}
function dragged(d) {
d.fx = d3.event.x;
d.fy = d3.event.y;
}
function dragended(d) {
if (!d3.event.active) simulation.alphaTarget(0);
d.fx = null;
d.fy = null;
}
.links line {
stroke: #999;
stroke-opacity: 0.6;
}
.nodes circle {
stroke: #fff;
stroke-width: 1.5px;
}
.node text {
pointer-events: none;
font: 10px sans-serif;
}
<script src="https://d3js.org/d3.v4.min.js"></script>
<svg width="960" height="600"></svg>
Original answer :
Your json is not "proper". First of all there is no source named ABC or targets named CO or FL.
Source and target values should be an id from the nodes. You cannot link something that is not defined.
Also you are not using the size and value attribute.
var svg = d3.select("svg"),
width = +svg.attr("width"),
height = +svg.attr("height");
var color = d3.scaleOrdinal(d3.schemeCategory20);
var simulation = d3.forceSimulation()
.force("link", d3.forceLink().id(function(d) { return d.id; }))
.force("charge", d3.forceManyBody())
.force("center", d3.forceCenter(width / 2, height / 2));
graph = {
"nodes": [
{"id": "AK","size": "1.414213562"},
{"id": "AL","size": "1.414213562"},
{"id": "AR","size": "1.414213562"},
{"id": "AZ","size": "2.828427125"}],
"links": [
{"source": "AK","target": "AL","value": "A"},
{"source": "AL","target": "AZ","value": "A"},
{"source": "AL","target": "AR","value": "A"},
{"source": "AZ","target": "AR","value": "A"}]
};
var link = svg.append("g")
.attr("class", "links")
.selectAll("line")
.data(graph.links)
.enter().append("line")
.attr("stroke-width", function(d) { return 1});
var node = svg.append("g")
.attr("class", "nodes")
.selectAll("circle")
.data(graph.nodes)
.enter().append("circle")
.attr("r", function(d){
return 5;
})
.attr("fill", function(d) { return color(d.id); })
.call(d3.drag()
.on("start", dragstarted)
.on("drag", dragged)
.on("end", dragended));
node.append("svg:title")
.attr("dx", 12)
.attr("dy", ".35em")
.text(function(d) { return d.id });
simulation
.nodes(graph.nodes)
.on("tick", ticked);
simulation.force("link")
.links(graph.links);
function ticked() {
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; });
}
function dragstarted(d) {
if (!d3.event.active) simulation.alphaTarget(0.3).restart();
d.fx = d.x;
d.fy = d.y;
}
function dragged(d) {
d.fx = d3.event.x;
d.fy = d3.event.y;
}
function dragended(d) {
if (!d3.event.active) simulation.alphaTarget(0);
d.fx = null;
d.fy = null;
}
.links line {
stroke: #999;
stroke-opacity: 0.6;
}
.nodes circle {
stroke: #fff;
stroke-width: 1.5px;
}
.node text {
pointer-events: none;
font: 10px sans-serif;
}
<script src="https://d3js.org/d3.v4.min.js"></script>
<svg width="960" height="600"></svg>

Related

Javascript/ D3.js / forcesimulation / force-directed

Please advise me what was wrong in the following code.
I want to create foce-directed graph by using D3.js
I cannot find where to correct in the following code.
Please advise me what was wrong in the following code.
I want to create foce-directed graph by using D3.js
I cannot find where to correct in the following code.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>D3 v5 force simulation</title>
</head>
<body>
<svg width="400" height="300"></svg>
<script src="https://d3js.org/d3.v5.min.js"></script>
<script>
var nodesData = [
{id:"Korea", "group": 1},
{id:"USA", "group": 1},
{id:"France", "group": 1},
{id:"UK", "group": 1},
{id:"Japan", "group": 1},
{id:"Turkey", "group": 1},
]
var linksData = [
{ "source": 'Korea', "target": 'USA'},
{ "source": 'UK', "target": 'USA' },
{ "source": 'France', "target": 'Turkey' },
{ "source": 'Korea', "target": 'UK' },
{ "source": 'Japan', "target": 'Turkey' },
{ "source": 'Japan', "target": 'Korea' }
]
var link = d3.select("svg")
.selectAll("line")
.data(linksData)
.enter()
.append("line")
.attr("stroke-width", 1)
.attr("stroke", "black");
var node = d3.select("svg")
.selectAll("circle")
.data(nodesData)
.enter()
.append("circle")
.attr("r", 10)
.attr("fill", "LightSalmon")
.call(d3.drag()
.on("start", dragstarted)
.on("drag", dragged)
.on("end", dragended));
var simulation = d3.forceSimulation()
.force("link", d3.forceLink())
.force("charge", d3.forceManyBody())
.force("center", d3.forceCenter(200, 150));
simulation
.nodes(nodesData)
.on("tick", ticked);
simulation.force("link")
.links(linksData);
function ticked() {
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; });
}
function dragstarted(d) {
if(!d3.event.active) simulation.alphaTarget(0.3).restart();
d.fx = d.x;
d.fy = d.y;
}
function dragged(d) {
d.fx = d3.event.x;
d.fy = d3.event.y;
}
function dragended(d) {
if(!d3.event.active) simulation.alphaTarget(0);
d.fx = null;
d.fy = null;
}
</script>

D3 v4 force layout disable animation on drag

How can i disable the animation while dragging the current node in the force simulation in the d3 version 4
Below is the code which is used for drag the node
var node = svg.selectAll(".node")
.data(json.nodes)
.enter().append("g")
.attr("class", "node")
.call(d3.drag()
.on("start", dragstarted)
.on("drag", dragged)
.on("end", dragended));
function dragstarted(d) {
if (!d3.event.active) force.alphaTarget(0.3).restart();
d.fx = d.x;
d.fy = d.y;
}
function dragged(d) {
d.fx = d3.event.x;
d.fy = d3.event.y;
}
function dragended(d) {
if (!d3.event.active) force.alphaTarget(0.3);
// d.fx = null;
//d.fy = null;
}
When i tried to stop the force while in dragged method it doesn't work out.
Please suggest me the best way to stop the animation
Please check this fiddle
It's not exactly clear what you mean by "disable the animation". I suppose that you're talking about the movement of the other nodes... well, that's quite the expected behaviour, since you're reheating the simulation.
A possible solution is setting the fx and fy property of all nodes when the simulation ends:
simulation.on("end", function() {
node.each(function(d) {
d.fx = d.x;
d.fy = d.y;
})
})
Here is your code with that change. Wait until the simulation ends (aprox. 5 seconds) and then drag the nodes:
var nodes = [{
"id": 1,
"name": "server 1"
}, {
"id": 2,
"name": "server 2"
}, {
"id": 3,
"name": "server 3"
}, {
"id": 4,
"name": "server 4"
}, {
"id": 5,
"name": "server 5"
}, {
"id": 6,
"name": "server 6"
}, {
"id": 7,
"name": "server 7"
}, {
"id": 8,
"name": "server 8"
}, {
"id": 9,
"name": "server 9"
}]
var links = [{
source: 1,
target: 2
}, {
source: 1,
target: 3
}, {
source: 1,
target: 4
}, {
source: 2,
target: 5
}, {
source: 2,
target: 6
}, {
source: 3,
target: 7
}, {
source: 5,
target: 8
}, {
source: 6,
target: 9
}, ]
var index = 10;
var svg = d3.select("svg"),
width = +svg.attr("width"),
height = +svg.attr("height"),
node,
link;
var simulation = d3.forceSimulation()
.force("link", d3.forceLink().id(function(d) {
return d.id;
}))
.force("charge", d3.forceManyBody())
.force("center", d3.forceCenter(width / 2, height / 2));
update();
function update() {
link = svg.selectAll(".link")
.data(links, function(d) {
return d.target.id;
})
link = link.enter()
.append("line")
.attr("class", "link");
node = svg.selectAll(".node")
.data(nodes, function(d) {
return d.id;
})
node = node.enter()
.append("g")
.attr("class", "node")
.on("click", click)
.call(d3.drag()
.on("start", dragstarted)
.on("drag", dragged)
.on("end", dragended));
node.append("circle")
.attr("r", 2.5)
node.append("title")
.text(function(d) {
return d.id;
});
node.append("text")
.attr("dy", 3)
.text(function(d) {
return d.name;
});
simulation
.nodes(nodes)
.on("tick", ticked)
.on("end", function() {
node.each(function(d) {
d.fx = d.x;
d.fy = d.y;
})
})
simulation.force("link")
.links(links);
}
function click(d) {
nodes.push({
id: index,
name: "server " + index
});
links.push({
source: d.id,
target: index
});
index++;
update();
}
function ticked() {
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("transform", function(d) {
return "translate(" + d.x + ", " + d.y + ")";
});
}
function dragstarted(d) {
if (!d3.event.active) simulation.alphaTarget(0.3).restart()
}
function dragged(d) {
d.fx = d3.event.x;
d.fy = d3.event.y;
}
function dragended(d) {
if (!d3.event.active) simulation.alphaTarget(0);
}
.link {
stroke: #aaa;
}
.node {
pointer-events: all;
stroke: none;
stroke-width: 40px;
cursor: pointer;
}
<script src="https://d3js.org/d3.v4.min.js"></script>
<svg width="600" height="400"></svg>
Take a look at this example: http://bl.ocks.org/norrs/2883411 as it seems to accomplish what you are after.
As indicated in the example and the related SO question (D3 force directed graph with drag and drop support to make selected node position fixed when dropped) you will probably be better off creating and using your own drag listener to achieve this specific behaviour.
Its actually very easy. Simply don't define :
.call(d3.drag().on("start", drag_start)
.on("drag", drag_drag)
.on("end", drag_end))
This is what is controlling the animation part, and yet you find problem in late loading of your graph due to huge data or something then i suggest add a property called .alphaDecay(0.9), this particular thing will decrease the link length thus decreasing your load time of graph.

D3 force directed graph direction

I'm new to D3, and am trying to make a graph similar to this example but a few things confuse me. I'm unsure when the example is referring to things built in to D3, or just the data set they are using.
Like here, I'm not sure about the id in d.id. as the example's data looks like this, which makes me think id is from the data. Or does it represent an index value?
"nodes": [
{"id": "Myriel", "group": 1},
{"id": "Napoleon", "group": 1}
],
// etc
"links": [
{"source": "Napoleon", "target": "Myriel", "value": 1},
{"source": "Mlle.Baptistine", "target": "Myriel", "value": 8},
{"source": "Mme.Magloire", "target": "Myriel", "value": 10},
//etc
var simulation = d3.forceSimulation()
.force("link", d3.forceLink().id(function(d) { return d.id; })) <-- where is this from?
.force("charge", d3.forceManyBody())
.force("center", d3.forceCenter(width / 2, height / 2));
SO! In my code I get an error repeating thousands of times, 'Uncaught Error: missing: X', where X is the value of the first source in my links array. I can console.log my data and it looks fine, and the elements are rendering to the DOM, but all bunched up to the top left of the SVG. I don't know what is wrong. I guess I have 2 questions.
Could someone clarify about the example id thing?
What does my error mean?
Any help would be appreciated.
My code;
var graph
var svg = d3.select("svg"),
width = +svg.attr("width"),
height = +svg.attr("height");
d3.json("./mock.json", function(json) {
var graph = json
console.log(graph);
console.log(graph.nodes);
var simulation = d3.forceSimulation()
.force("link", d3.forceLink(graph.links))
.force("charge", d3.forceManyBody())
.force("center", d3.forceCenter(width/2, height/2));
var link = svg.append("g")
.attr("class", "links")
.selectAll("line")
.data(graph.links)
.enter().append("line")
//.attr("stroke-width", function(d) {return Math.sqrt(d.value); });
var node = svg.append("g")
.attr("class", "nodes")
.selectAll("circle")
.data(graph.nodes)
.enter().append("circle")
.attr("r", 5)
//.attr("fill", function(d) { return color(d.id); })
.call(d3.drag()
.on("start", dragstarted)
.on("drag", dragged)
.on("end", dragended));
node.append("title")
.text(function(d) {return d.text });
simulation
.nodes(graph.nodes)
.on("tick", ticked);
simulation.force("link")
.links(graph.links);
})
function ticked() {
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; });
}
function dragstarted(d) {
if(!d3.event.active) simulation.alphaTarget(0.3).restart();
d.fx = d.x;
d.fy = d.y;
}
function dragged(d) {
d.fx = d3.event.x;
d.fy = d3.event.y;
}
function dragended(d) {
if(!d3.event.active) simulation.alphaTarget(0);
d.fx = null;
d.fy = null;
}
});
Data:
{
"nodes":[
{"reference":5, "year": 0, "text":"The amount of time spent on video gaming is related negatively to academic achievement", "tags":["Academic disturbance"]},
{"reference":5, "year": 0, "text":"Digital addiction ranges from <1% and 38%", "tags":["Addiction"]},
{"reference":58, "year": 0, "text":"Patological video game play impacts negativelly academic achievement", "tags":["Addiction"]},
{"reference":77, "year": 2009, "text":"74% of adults have Internet access at home", "tags":["Adults"]},
{"reference":64, "year": 0, "text":"Apathetic users spend short times on web pages, follow no logical order, and make random selections", "tags":["Apathetic hypertext users3"]},
{"reference":8, "year": 0, "text":"49.8% of sessions are shorter than 5 seconds", "tags":["App usage"]}
],
"links": [
{"source":0,"target":2},
{"source":0,"target":6},
{"source":1,"target":6},
{"source":1,"target":3},
{"source":1,"target":2}
]
}
There are two issues with your code:
The index of 6, see in your links array, is not available in the nodes array. nodes has a length of 6, which means the largest index is 5. This causes an error even with the correct code. I have change 6 to 5 in my working example below, and I believe that is what you want.
Since the links are based on the index, you can simply return the index instead of the ID, i.e. d3.forceLink().id(function(d,i) { return i; }.
Here is the proof-of-function example:
var graph
var svg = d3.select("svg"),
width = +svg.attr("width"),
height = +svg.attr("height");
var json = {
"nodes": [{
"reference": 5,
"year": 0,
"text": "The amount of time spent on video gaming is related negatively to academic achievement",
"tags": ["Academic disturbance"]
}, {
"reference": 5,
"year": 0,
"text": "Digital addiction ranges from <1% and 38%",
"tags": ["Addiction"]
}, {
"reference": 58,
"year": 0,
"text": "Patological video game play impacts negativelly academic achievement",
"tags": ["Addiction"]
}, {
"reference": 77,
"year": 2009,
"text": "74% of adults have Internet access at home",
"tags": ["Adults"]
}, {
"reference": 64,
"year": 0,
"text": "Apathetic users spend short times on web pages, follow no logical order, and make random selections",
"tags": ["Apathetic hypertext users3"]
}, {
"reference": 8,
"year": 0,
"text": "49.8% of sessions are shorter than 5 seconds",
"tags": ["App usage"]
}],
"links": [{
"source": 0,
"target": 2
}, {
"source": 0,
"target": 5
}, {
"source": 1,
"target": 5
}, {
"source": 1,
"target": 3
}, {
"source": 1,
"target": 2
}
]
};
var graph = json;
var simulation = d3.forceSimulation()
.force("link", d3.forceLink().id(function(d, i) {
return i;
}))
.force("charge", d3.forceManyBody())
.force("center", d3.forceCenter(width / 2, height / 2));
var link = svg.append("g")
.attr("class", "links")
.selectAll("line")
.data(graph.links)
.enter().append("line")
//.attr("stroke-width", function(d) {return Math.sqrt(d.value); });
var node = svg.append("g")
.attr("class", "nodes")
.selectAll("circle")
.data(graph.nodes)
.enter().append("circle")
.attr("r", 5)
//.attr("fill", function(d) { return color(d.id); })
.call(d3.drag()
.on("start", dragstarted)
.on("drag", dragged)
.on("end", dragended));
node.append("title")
.text(function(d) {
return d.text
});
simulation
.nodes(graph.nodes)
.on("tick", ticked);
simulation.force("link")
.links(graph.links);
function ticked() {
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;
});
}
function dragstarted(d) {
if (!d3.event.active) simulation.alphaTarget(0.3).restart();
d.fx = d.x;
d.fy = d.y;
}
function dragged(d) {
d.fx = d3.event.x;
d.fy = d3.event.y;
}
function dragended(d) {
if (!d3.event.active) simulation.alphaTarget(0);
d.fx = null;
d.fy = null;
}
.links line {
stroke: #aaa;
}
.nodes circle {
pointer-events: all;
stroke: none;
stroke-width: 40px;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/4.2.8/d3.min.js"></script>
<svg width="500" height="200"></svg>

Adding arrows and text to nodes in d3js Force Layout

I have been trying to add text and arrow to a d3js force layout diagram but was not being able to get the desired results.
My script looks like the following:
var width = 600;
height = 400;
var color = d3.scale.category20();
var force = d3.layout.force()
.charge(-120)
.linkDistance(100)
.size([width, height]);
var svg = d3.select("#t").append("svg")
.attr("width", width)
.attr("height", height);
d3.json("topology.json", function(error, graph) {
if (error) throw error;
force
.nodes(graph.nodes)
.links(graph.links)
.start();
var link = svg.selectAll(".link")
.data(graph.links)
.enter().append("line")
.attr("class", "link")
.style("stroke-width", function(d) { return 2*(d.value); });//Math.sqrt
var node = svg.selectAll(".node")
.data(graph.nodes)
.enter().append("circle")
.attr("class", "node")
.attr("r", 10)
.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; });
});
});
I tried to add the following snippet to add text
node.append("text")
.attr("x", 12)
.attr("dy", ".35em")
.text(function(d) { return d.name; });
The sample json data is
{
"nodes": [{
"name": "0",
"group": 2
}, {
"name": "1",
"group": 2
}, {
"name": "2",
"group": 2
}, {
"name": "3",
"group": 1
}],
"links": [{
"source": 0,
"target": 1,
"value": 1
}, {
"source": 1,
"target": 3,
"value": 2
}, {
"source": 2,
"target": 3,
"value": 1
}]
}
Any help with adding text to the circles and arrows would be great. Sorry if I sounded a noob.
Thanks :) :)
Mobashyr,I have used the below sample for fulfill my requirement :
// Restart the force layout.
var force.nodes(nodes)
.links(links)
.charge(-1000)
.linkDistance(120)
.alpha(-15)
.start();
var link = vis.selectAll(".link")
.data(links);
link.enter().insert("svg:line", ".node")
.attr("class", "link")
.style("stroke", "#ccc")
.attr("cursor", "pointer")
.style("stroke-width", "0")
.style("stroke-width", function(d) { return d.weight;})
.on("mouseover", function() { d3.select(this).style("stroke", "#555555").attr("stroke-opacity", "1.0").attr("stroke-width","10");})
.on("mouseout", function() { d3.select(this).style("stroke", "#ccc").attr("stroke-opacity", "1.0").attr("stroke-width","4") });
link.exit().remove();
var node = vis.selectAll("g.node")
.data(nodes)
var groups = node.enter().append("g")
.attr("class", "node")
.attr("id", function (d) {
return d.entityType;
})
.on('click', click)
groups.append("circle")
.attr("cursor", "pointer")
.style("fill", function(d) { return color(d.entityType); })
.style("fill", "#fff")
.style("stroke-width", "0")
.style("stroke", "#ddd")
.attr("r", 20);
groups.append("text")
.attr("dy", 18)
.style("font-size", "2.5px")
.style("text-anchor", "middle")
.style('fill','#000')
.attr("refX", 15)
.attr("refY", -1.5)
.text(function (d) {
return d.text;
});
node.exit().remove();
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("transform", function(d) {
return "translate(" + d.x + "," + d.y + ")";
});

Right way to transform D3 into AngularJs

So I have been doing a lot of experimenting with D3 but have never attempted to turn it into an AngularJS directive, and I am not even sure of the proper way to change it over. I have an example that I believe I turned into an Angular D3 chart however I believe there are more efficient ways in loading the data , maybe in a $scope.data... Please use my jsfiddle to reference or correct.
https://jsfiddle.net/bcnmLrns/1/
var app = angular.module("chartApp", []); {
var data = {
"nodes": [{
"name": "hblodget",
"group": 1,
"size": 1,
"image": null
}, {
"name": "DowntownDonna69",
"group": 1,
"size": 20,
"image": "http://pbs.twimg.com/profile_images/636139174672732160/L5cd008s_normal.jpg"
}, {
"name": "PupsherLive",
"group": 1,
"size": 19,
"image": "http://pbs.twimg.com/profile_images/378800000210840839/93a8ba3852a8e20364957eb8b907b6b3_normal.jpeg"
}],
"links": [{
"source": 1,
"target": 0,
"value": 1
}, {
"source": 2,
"target": 0,
"value": 1
}]
};
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("body").append("svg")
.attr("width", width)
.attr("height", height);
d3.json(data, function(error, graph) {
if (error) throw error;
force
.nodes(graph.nodes)
.links(graph.links)
.start();
var link = svg.selectAll(".link")
.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;
});
});
});
}
You can use other directives and services people have made to make D3 easier to use in Angular (see comments on question), but I still like the easy setup of modularizing graphs and such inside a simple directive:
myApp.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(data, 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
}
};
});

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