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I want to get a list of nodes from links data in JSON file.
Later I would like to plot a graph with links and edges.
My sample json file:
{
"links": [
{ "source":0, "target":1, "value":20, "orientation":"down" },
{ "source":1, "target":2, "value":1, "orientation":"left" },
{ "source":2, "target":3, "value":1, "orientation":"right" }
]
}
my JS function:
$(function() {
var width = 500,
height = 300;
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height);
var force = d3.layout.force()
.gravity(.05)
.distance(100)
.charge(-100)
.size([width, height]);
d3.json("test_1.json", function(error, json) {
if (error) throw error;
var count = 0;
var nodes = [];
json.links.forEach(function(e) {
count++;
nodes.push({name: "test_"+e.source, orientation: e.orientation});
});
console.log("Count is : "+count);
force
.nodes(json.nodes)
.links(json.links)
.start();
var link = svg.selectAll(".link")
.data(json.links)
.enter().append("line")
.attr("class", "link");
var node = svg.selectAll(".node")
.data(json.nodes)
.attr("class", "node")
.call(force.drag);
node.append("circle")
.attr("class", "node")
.attr("r", 5);
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 + ")"; });
});
});
});
I cannot get a list from the function though as there seems to be an error with the forEach method of JSON.
Could anyone please help?
UPDATE: added the complete code.
Error: Cannot read property 'weight' of undefined.
So i added some nodes in my JSON because i think d3 always expects a node.
As far as you assign newly created nodes array to nodes variable you should pass it to your force layout, not links.nodes.
force
.nodes(nodes)
.links(json.links)
.start();
Or just add it to links object
...
json.links.forEach(function(e) {
count++;
nodes.push({name: "test_"+e.source, orientation: e.orientation});
});
links.nodes = nodes;
...
So I could find a way to do it:
my JSON file:
[
{"source":"entry","target":"chocolate","value":20,"orientation":"down","x": 200, "y": 150},
{"source":"chocolate","target":"bread","value":1,"orientation":"left","x": 140, "y": 300},
{"source":"bread","target":"soap","value":1,"orientation":"right","x": 400, "y": 190}
]
my JS code:
var width = 960,
height = 500;
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height);
var force = d3.layout.force()
.size([width, height])
.linkDistance(20)
.charge(-500);
d3.json("name.json", function(error, links) {
if (error) throw error;
var nodesByName = {};
// Create nodes for each unique source and target.
links.forEach(function(link) {
link.source = nodeByName(link.source);
link.target = nodeByName(link.target);
});
// Extract the array of nodes from the map by name.
var nodes = d3.values(nodesByName);
// Create the link lines.
var link = svg.selectAll(".link")
.data(links)
.enter().append("line")
.attr("class", "link");
// Create the node circles.
var node = svg.selectAll(".node")
.data(nodes)
.enter().append("circle")
.attr("class", "node")
.attr("r", 4.5)
.call(force.drag);
// Start the force layout.
force
.nodes(nodes)
.links(links)
.on("tick", tick)
.start();
function tick() {
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 nodeByName(name) {
return nodesByName[name] || (nodesByName[name] = {name: name});
}
});
});
It can draw the required layout.
Reference: https://gist.github.com/mbostock/2949937
Thanks!
I'm able to get images and labels to show for the nodes, but they show at the top left of the screen.
Nodes show up in the correct position when I use this
.enter().append("circle")
Labels and node images show at the top left (incorrect) when I use this:
.enter().append("g")
This works with append "circle" (commented out in the code below):
When I comment out append circle and use append "g" (in order to use node images and labels) the images and labels all show up near (0,0) instead of near the node:
Also, what exactly is append "g"? Where is the documentation to find out what's possible with append "g"?
Here is all the code:
<script>
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);
var graph = getData();
var nodeMap = {};
graph.nodes.forEach(function(d) { nodeMap\[d.name\] = d; });
graph.links.forEach(function(l) {
l.source = nodeMap\[l.source\];
l.target = nodeMap\[l.target\];
})
force.nodes(graph.nodes)
.links(graph.links)
.start();
var link = svg.selectAll(".link")
.data(graph.links)
.enter().append("line")
.attr("class", "link")
.style("stroke", function(d) {
return d.line_color;
})
.style("stroke-width", function(d) {
return Math.sqrt(d.value)+1;
});
var node = svg.selectAll(".node")
.data(graph.nodes)
// .enter().append("circle")
// .attr("class", "node")
// .attr("r", 10)
// .style("fill", function(d) { return d.fill_color; })
// .call(force.drag);
.enter().append("g")
.attr("class", "node")
.attr("r", 15)
.style("fill", function(d) { return d.fill_color; })
.on("click", function(d){
alert("You clicked on node " + d.name);
})
.call(force.drag);
node.append("title")
.text(function(d) { return d.label; });
node.append("image")
.attr("xlink:href", function(d) { return d.image_url })
.attr("x", -8)
.attr("y", -8)
.attr("width", 26)
.attr("height", 26);
node.append("text")
.attr("dx", function(d) {
if (d.image_url == "/profile.png"){
return 100;
}
else{
return 16;
}
})
.attr("dy", function(d) {
if (d.image_url == "/profile.png"){
return 100;
}
else{
return ".35em";
}
})
// .attr("dy", ".35em")
.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; });
});
function getData() {
return {
"nodes":\[
{"name":"user1","image_url":"http://upload.wikimedia.org/wikipedia/en/thumb/8/80/Wikipedia-logo-v2.svg/103px-Wikipedia-logo-v2.svg.png","fill_color":"blue","text_color":"black"},
{"name":"user2","image_url":"http://upload.wikimedia.org/wikipedia/en/thumb/8/80/Wikipedia-logo-v2.svg/103px-Wikipedia-logo-v2.svg.png","fill_color":"blue","text_color":"black"},
{"name":"user3","image_url":"http://upload.wikimedia.org/wikipedia/en/thumb/8/80/Wikipedia-logo-v2.svg/103px-Wikipedia-logo-v2.svg.png","fill_color":"blue","text_color":"black"},
{"name":"tag1","image_url":"","fill_color":"blue","text_color":"black"},
{"name":"tag2","image_url":"","fill_color":"blue","text_color":"black"},
{"name":"tag3","image_url":"","fill_color":"blue","text_color":"black"}
\],
"links":\[
{"source":"tag1","target":"user1","value":1,"line_color":"green"},
{"source":"tag2","target":"user1","value":1,"line_color":"green"},
{"source":"tag3","target":"user1","value":1,"line_color":"green"},
{"source":"tag1","target":"user2","value":1,"line_color":"green"},
{"source":"tag2","target":"user2","value":1,"line_color":"green"}
\]
};
}
</script>
With .append("g") you insert a SVG Group Element.
The problem is, that you try to apply attributes that are for circles, like the radius with .attr("r",15), to the group element.
You have to use circles if you want to draw a circle. Group elements do not have any shape. They are used to group elements like circles.
A solution would be to append the g element and transform it to the location of the node. I updated your code in the following snippet. I used the group elements and added the circle, image and text inside the group elements.
Moreover I removed the backslashes before each angular bracket and set the title to the field name instead of label.
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);
var graph = getData();
var nodeMap = {};
graph.nodes.forEach(function(d) { nodeMap[d.name] = d; });
graph.links.forEach(function(l) {
l.source = nodeMap[l.source];
l.target = nodeMap[l.target];
})
force.nodes(graph.nodes)
.links(graph.links)
.start();
var link = svg.selectAll(".link")
.data(graph.links)
.enter()
.append("line")
.attr("class", "link")
.style("stroke", function(d) {
return d.line_color;
})
.style("stroke-width", function(d) {
return Math.sqrt(d.value)+1;
});
var node = svg.selectAll(".node")
.data(graph.nodes)
.enter()
.append("g")
.attr("transform", function(d){return "translate("+d.x+","+d.y+")"})
.call(force.drag);
node.append("circle")
.attr("class", "node")
.attr("r", 15)
.style("fill", function(d) { return d.fill_color; })
.on("click", function(d){
alert("You clicked on node " + d.name);
});
node.append("title")
.text(function(d) { return d.name; });
node.append("image")
.attr("xlink:href", function(d) { return d.image_url })
.attr("x", -8)
.attr("y", -8)
.attr("width", 26)
.attr("height", 26);
node.append("text")
.attr("dx", function(d) {
if (d.image_url == "/profile.png"){
return 100;
}
else{
return 16;
}
})
.attr("dy", function(d) {
if (d.image_url == "/profile.png"){
return 100;
}
else{
return ".35em";
}
})
// .attr("dy", ".35em")
.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("transform", function(d){return "translate("+d.x+","+d.y+")"});
});
function getData() {
return {
"nodes":[
{"name":"user1","image_url":"http://upload.wikimedia.org/wikipedia/en/thumb/8/80/Wikipedia-logo-v2.svg/103px-Wikipedia-logo-v2.svg.png","fill_color":"blue","text_color":"black"},
{"name":"user2","image_url":"http://upload.wikimedia.org/wikipedia/en/thumb/8/80/Wikipedia-logo-v2.svg/103px-Wikipedia-logo-v2.svg.png","fill_color":"blue","text_color":"black"},
{"name":"user3","image_url":"http://upload.wikimedia.org/wikipedia/en/thumb/8/80/Wikipedia-logo-v2.svg/103px-Wikipedia-logo-v2.svg.png","fill_color":"blue","text_color":"black"},
{"name":"tag1","image_url":"","fill_color":"blue","text_color":"black"},
{"name":"tag2","image_url":"","fill_color":"blue","text_color":"black"},
{"name":"tag3","image_url":"","fill_color":"blue","text_color":"black"}
],
"links":[
{"source":"tag1","target":"user1","value":1,"line_color":"green"},
{"source":"tag2","target":"user1","value":1,"line_color":"green"},
{"source":"tag3","target":"user1","value":1,"line_color":"green"},
{"source":"tag1","target":"user2","value":1,"line_color":"green"},
{"source":"tag2","target":"user2","value":1,"line_color":"green"}
]
};
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.11/d3.min.js"></script>
I don't understand how to display text on my nodes
I tried several times but didn't work, please help me to solve it
I'm not familiar with D3.js at all but I need to visualize a graph for my project, and I need this additional feature (display label) on the nodes
Here is the input file:
{
"nodes":[
{"name":"A","group":0},
{"name":"B","group":1},
{"name":"C","group":2},
{"name":"D","group":3},
{"name":"E","group":4}
],
"links":[
{"source":0,"target":1,"value":11},
{"source":0,"target":2,"value":11},
{"source":1,"target":2,"value":21},
{"source":1,"target":3,"value":21},
{"source":1,"target":4,"value":21},
{"source":2,"target":3,"value":21},
{"source":2,"target":4,"value":21},
{"source":3,"target":4,"value":11}
]
}
D3.js Code:
<script type="text/javascript">
// use print_graph() method to output graph vertices
main_graph();
var width = 700,
height = 300;
var color = d3.scale.category20();
var force = d3.layout.force()
.charge(-120)
.linkDistance(150)
.size([width, height]);
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height)
.attr("transform", "translate(0,0)");
d3.json("input.json", function(error, graph) {
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")
// size of nodes
.attr("r", 20)
.style("fill", function(d) {
return color(d.group);
})
.call(force.drag);
//I'm stuck here
var texts = svg.selectAll("text.label")
.data(graph.nodes)
.enter().append("text")
.attr("class", "label")
.attr("fill", "white")
.text(function(d) {
return d.name;
});
/*
// 1st trying
var text = svg.selectAll("text")
.data(graph.node)
.enter().append("text")
.attr("fill","white")
.text(function (d) {return d.name; });
*/
// another trying
//node.append("text")
//.text(function(d) { return d.name; });
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;
});
});
});
</script>
How you are adding the text is fine but in your force.on("tick", function() {}) handler you don't position the them:
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;
});
texts.attr("x", function(d) { //<-- NEED TO POSITION THESE TOO
return d.x;
})
.attr("y", function(d) {
return d.y;
});
});
Here's your code fixed.
I've been trying to glue ideas from various d3 examples into what i need, starting with the basic example using miserable.json data and then adding:
use of a key function for the data joins
modifying the underlying graph ala this example
making the links' linkDistance() function depend on an attribute of the graph's links'
adding labels to the nodes ala this example
So far i'm only 3 out of 4: something about using the g elements -- using code taken directly from the Mike's "Labeled Force Layout" example -- breaks things and the nodes aren't drawn. I can make it work if i join circle elements directly, but not if I interpose g elements with attached circles and text elements.
The code below is my best effort at a minimal example. This example works, but does not if I replace the .enter().append("circle") line with the .enter().append("g") lines.
Does anyone know why?
var Width = 200;
var Height = 200;
var Pix2Len = 10;
var color = d3.scale.category10();
var svg = d3.select("body").append("svg")
.attr("width", Width)
.attr("height", Height);
var force = d3.layout.force()
.size([Width, Height])
var graph = {
"nodes":[
{"name":"Myriel","idx":0},
{"name":"Napoleon","idx":1},
{"name":"Mlle.Baptistine","idx":2},
{"name":"Mme.Magloire","idx":3}
],
"links":[
{"source":1,"target":0,"len":1,"idx":"1-0"},
{"source":2,"target":1,"len":4,"idx":"2-1"},
{"source":2,"target":0,"len":8,"idx":"2-0"},
{"source":3,"target":0,"len":10,"idx":"3-0"},
{"source":3,"target":1,"len":4,"idx":"3-1"},
{"source":3,"target":2,"len":6,"idx":"3-2"}
]
}
console.log("data loaded. nnode="+graph.nodes.length+" nlinks="+graph.links.length);
force
.nodes(graph.nodes)
.links(graph.links)
.size([Width, Height])
.linkDistance(function(link) {
// console.log("link: "+link.source.name+' '+link.target.name+' '+link.idx+' '+link.len)
return link.len * Pix2Len})
.on("tick", tick);
var link = svg.selectAll(".link")
.data(graph.links, function(d) {return d.idx; })
.enter().append("line")
.attr("class", "link");
var node = svg.selectAll(".node")
.data(graph.nodes, function(d) {return d.idx; })
// THIS WORKS
.enter().append("circle").attr("r", 8).style("fill", function(d) { return color(0); });
// BUT THIS DOES NOT
// modeled after http://bl.ocks.org/mbostock/950642
//
//.enter().append("g")
//.attr("class", "node")
//.attr("cx", function(d) { return d.x; })
//.attr("cy", function(d) { return d.y; });
//
//node.append("circle")
//.attr("r", 10)
//.style("fill", function(d) { return color(0); });
//
//node.append("text")
//.attr("dx", 12)
//.attr("dy", ".35em")
//.text(function(d) { return d.name });
// 1. Begin with graph from JSON data
setTimeout(function() {
start();
}, 0);
// 2. Change graph topology
setTimeout(function() {
var new4 = {"name":"CountessdeLo","idx":4}
var new5 = {"name":"Geborand","idx":5}
graph.nodes.push(new4,new5);
var link40 = {"source":4,"target":0,"len":1,"idx":"4-0"};
var link43 = {"source":4,"target":3,"len":4,"idx":"4-3"};
var link50 = {"source":5,"target":0,"len":1,"idx":"5-0"};
var link52 = {"source":5,"target":2,"len":4,"idx":"5-2"};
graph.links.push(link40,link43,link50,link52);
start();
}, 3000);
//3. Change some link lengths
setTimeout(function() {
// force.links().forEach(function(link) {
graph.links.forEach(function(link) {
if (link.idx == '1-0')
{link.len=10; }
else if (link.idx == '3-0')
{link.len=2; }
else if (link.idx == '5-0')
{link.len=10; };
}); // eo-forEach
start();
}, 6000);
function start() {
link = link.data(force.links(), function(d) { return d.idx; });
link.enter().insert("line", ".node").attr("class", "link");
link.exit().remove();
node = node.data(force.nodes(), function(d) { return d.idx;});
node.enter().append("circle").attr("class", function(d) {
// tried with the <g> version above
// node.enter().append("g").attr("class", function(d) {
console.log('start:'+' '+d.name);
return d.idx; }).attr("r", 5).style("fill", function(d) { return color(1); });
node.exit().remove();
force.start();
}
function tick() {
node.attr("cx", function(d) {
// console.log('tick:'+' '+d.name);
return d.x; })
.attr("cy", function(d) { return d.y; })
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; });
}
//} // eo-ready()
In your code you are setting cx and cy attributes to the g element. g elements does not support any position attributes like x, y or cx, cy. To move the contents of a g element you will have to use the transform attribute.
Your code
var node = svg.selectAll(".node")
.data(graph.nodes, function(d) {return d.idx; })
.enter().append("g")
.attr("class", "node")
.attr("cx", function(d) { return d.x; }) //will not work
.attr("cy", function(d) { return d.y; }); //will not work
Solution
var node = svg.selectAll(".node")
.data(graph.nodes, function(d) {return d.idx; })
.enter().append("g")
.attr("class", "node");
node.append("circle")
.attr("r", 10)
.style("fill", function(d) { return color(0); });
node.append("text")
.attr("dx", 12)
.attr("dy", ".35em")
.text(function(d) { return d.name });
Use translate function as below to move group elements.
function tick() {
//Moving <g> elements using transform attribute
node.attr("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; });
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; });
}
JSFiddle
I am trying to implement fisheye distortion on a force directed graph using d3.js. For some reason, the distortion works on the links but not the nodes. This might be caused by the nodes being g elements, but I am not sure. Any help would be appreciated!
var svg, node, link;
function make_graph() {
// Clear out the div first
$("#display_graph svg:first").remove();
// Sets size
var width = 960,
height = 500;
// Maps groups to colors
var color = d3.scale.category20();
// Select the div and append a svg
svg = d3.select("#display_graph").append("svg")
.attr("width", width)
.attr("height", height);
// Pull json from graph
var json_from_db = $('.graph_json').data('json');
var json_nodes = json_from_db.nodes
var json_links = json_from_db.links
// Sets up the force directed graph
var charge_val = $('#charge').val();
var link_distance_val = $('#link_distance').val();
var force = d3.layout.force()
.charge(charge_val)
.linkDistance(link_distance_val)
.size([width, height])
.nodes(json_nodes)
.links(json_links)
.start();
link = svg.selectAll(".link")
.data(json_links)
.enter().append("line")
.attr("class", "link")
.style("stroke-width", function(d) { return Math.sqrt(d.value); });
var font_size_px = $('#font_size').val();
node = svg.selectAll(".node")
.data(json_nodes)
.enter().append("g")
.attr("class", "node")
.style("font-size", font_size_px)
.call(force.drag);
var radius = $('#radius').val();
node.append("circle")
.attr("r", radius)
.style("fill", function(d) { return color(d.group); });
node.append("text")
.attr("dx", 12)
.attr("dy", ".35em")
.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("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; });
});
$('#fisheye_btn').click( function() {
var glyph_color = $(this).css('color');
// original color is white
orig_color = 'rgb(255, 255, 255)';
if (glyph_color == orig_color) {
$(this).css('color', 'orange');
} else {
$(this).css('color', orig_color);
};
});
};
function make_fisheye() {
var fisheye = d3.fisheye.circular()
.radius(200)
.distortion(2);
svg.on("mousemove", function() {
fisheye.focus(d3.mouse(this));
node.each(function(d) { d.fisheye = fisheye(d); })
.attr("cx", function(d) { return d.fisheye.x; })
.attr("cy", function(d) { return d.fisheye.y; })
.attr("r", function(d) { return d.fisheye.z * 4.5; });
link.attr("x1", function(d) { return d.source.fisheye.x; })
.attr("y1", function(d) { return d.source.fisheye.y; })
.attr("x2", function(d) { return d.target.fisheye.x; })
.attr("y2", function(d) { return d.target.fisheye.y; });
});
}
Eventually, I want the user to be able to turn the distortion on or off by clicking a button. Thanks for your help!
I updated the code. I can turn the distortion on or off with a button click now.
// Make force directed graph on button click
$(document).ready( function() {
$("#refresh_btn").click( function() {
make_graph();
});
});
// Turn on and off fisheye distortion
$(document).ready( function() {
$('#fisheye_btn').click( function() {
var glyph_color = $(this).css('color');
// original color is white
orig_color = 'rgb(255, 255, 255)';
if (glyph_color == orig_color) {
$(this).css('color', 'orange');
make_graph();
make_fisheye();
} else {
$(this).css('color', orig_color);
make_graph();
};
});
});
var svg, node, link;
function make_graph() {
// Clear out the div first
$("#display_graph svg:first").remove();
// Sets size
var width = 960,
height = 500;
// Maps groups to colors
var color = d3.scale.category20();
// Select the div and append a svg
svg = d3.select("#display_graph").append("svg")
.attr("width", width)
.attr("height", height);
// Pull json from graph
var json_from_db = $('.graph_json').data('json');
var json_nodes = json_from_db.nodes
var json_links = json_from_db.links
// Sets up the force directed graph
var charge_val = $('#charge').val();
var link_distance_val = $('#link_distance').val();
var force = d3.layout.force()
.charge(charge_val)
.linkDistance(link_distance_val)
.size([width, height])
.nodes(json_nodes)
.links(json_links)
.start();
link = svg.selectAll(".link")
.data(json_links)
.enter().append("line")
.attr("class", "link")
.style("stroke-width", function(d) { return Math.sqrt(d.value); });
var font_size_px = $('#font_size').val();
node = svg.selectAll(".node")
.data(json_nodes)
.enter().append("g")
.attr("class", "node")
.style("font-size", font_size_px)
.call(force.drag);
var radius = $('#radius').val();
node.append("circle")
.attr("r", radius)
.style("fill", function(d) { return color(d.group); });
node.append("text")
.attr("dx", 12)
.attr("dy", ".35em")
.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("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; });
});
};
function make_fisheye() {
var fisheye = d3.fisheye.circular()
.radius(200)
.distortion(2);
svg.on("mousemove", function() {
fisheye.focus(d3.mouse(this));
node.each(function(d) { d.fisheye = fisheye(d); })
.attr("cx", function(d) { return d.fisheye.x; })
.attr("cy", function(d) { return d.fisheye.y; })
.attr("r", function(d) { return d.fisheye.z * 4.5; });
link.attr("x1", function(d) { return d.source.fisheye.x; })
.attr("y1", function(d) { return d.source.fisheye.y; })
.attr("x2", function(d) { return d.target.fisheye.x; })
.attr("y2", function(d) { return d.target.fisheye.y; });
});
}
Unfortunately, I am still having issues with just the links being distorted. The nodes are actually g elements, which I am becoming more and more convinced might be the problem. Is there a way to select elements inside the g element using d3.js? I am surprised that the fisheye distortion is not just passed on to the elements inside the g element. Maybe my guess is wrong?
New Code
Now both the nodes and links are distorted on a button click! Here is the code:
// Global variables
var svg, node, link;
var fisheye_on = false;
// Make force directed graph on button click
$(document).ready( function() {
$("#refresh_btn").click( function() {
// Make sure fisheye is turned off
$('#fisheye_btn').css('color', 'white');
fisheye_on = false;
make_graph();
});
});
// Turn on and off fisheye distortion
$(document).ready( function() {
$('#fisheye_btn').click( function() {
var glyph_color = $(this).css('color');
// original color is white
orig_color = 'rgb(255, 255, 255)';
if (glyph_color == orig_color) {
$(this).css('color', 'orange');
fisheye_on = true;
make_graph();
} else {
$(this).css('color', orig_color);
fisheye_on = false;
make_graph();
};
});
});
function make_graph() {
// Clear out the div first
$("#display_graph svg:first").remove();
// Sets size
var width = 960,
height = 500;
// Maps groups to colors
var color = d3.scale.category20();
// Select the div and append a svg
svg = d3.select("#display_graph").append("svg")
.attr("width", width)
.attr("height", height);
// Pull json from graph
var json_from_db = $('.graph_json').data('json');
var json_nodes = json_from_db.nodes
var json_links = json_from_db.links
// Sets up the force directed graph
var charge_val = $('#charge').val();
var link_distance_val = $('#link_distance').val();
var force = d3.layout.force()
.charge(charge_val)
.linkDistance(link_distance_val)
.size([width, height])
.nodes(json_nodes)
.links(json_links)
.start();
link = svg.selectAll(".link")
.data(json_links)
.enter().append("line")
.attr("class", "link")
.style("stroke-width", function(d) { return Math.sqrt(d.value); });
var font_size_px = $('#font_size').val();
node = svg.selectAll(".node")
.data(json_nodes)
.enter().append("g")
.attr("class", "node")
.style("font-size", font_size_px)
.call(force.drag);
var radius = $('#radius').val();
node.append("circle")
.attr("r", radius)
.style("fill", function(d) { return color(d.group); });
node.append("text")
.attr("dx", 12)
.attr("dy", ".35em")
.text(function(d) { return d.name; });
if (fisheye_on == false) {
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 + ")"; });
});
} else {
var fisheye = d3.fisheye.circular()
.radius(200)
.distortion(2);
svg.on("mousemove", function() {
fisheye.focus(d3.mouse(this));
node.each(function(d) { d.fisheye = fisheye(d); });
node.selectAll("circle")
.attr("cx", function(d) { return d.fisheye.x - d.x; })
.attr("cy", function(d) { return d.fisheye.y - d.y; })
.attr("r", function(d) { return d.fisheye.z * 4.5; });
node.selectAll("text")
.attr("dx", function(d) { return d.fisheye.x - d.x; })
.attr("dy", function(d) { return d.fisheye.y - d.y; });
link.attr("x1", function(d) { return d.source.fisheye.x; })
.attr("y1", function(d) { return d.source.fisheye.y; })
.attr("x2", function(d) { return d.target.fisheye.x; })
.attr("y2", function(d) { return d.target.fisheye.y; });
});
};
};
Unfortunately, I have come across another issue. There seems to be an initial lag when the distortion is applied. The nodes get distorted first and then the links get distorted. Not sure what is causing this. Any hints?
Public JSFiddle
I managed to replicated the issue in a public JSFiddle:
http://jsfiddle.net/cspears2002/vVL99/
In order to make the graph, just click "Make Graph". Clicking "Fisheye" will turn the fisheye distortion on and off. The issue is that the nodes are distorted first and then the links follow. I want nodes and links to be distorted at the same time. Any help would be appreciated!