I currently have a hover effect on each node, as well as a hover effect on each element of the legend.
I want to execute the effect when the user interacts with the legend so the relevant node on the chart is highlighted and visa versa. I also want to toggle the effect on and off.
So when the user clicks/hovers over a node the relevant legend item is highlighted in grey.
And when the user clicks/hovers over a legend item the relevant node is highlighted with a black stroke.
I have had a look at the following (Selectable Elements) but can't work out how to apply this to my code.
My understanding so far is that I need to apply a class (something like .selected) to the related element on mouseover & when toggled.
JSFiddle
//Nodes V2
var width = 300,
height = 300,
colors = d3.scale.category20b();
var force = d3.layout.force()
.gravity(.2)
.charge(-3000)
.size([width, height]);
//Svg Chart SVG Settings
var svg = d3.select("#chart").append("svg:svg")
.attr("width", width)
.attr("height", height);
var root = getData();
var nodes = flatten(root),
links = d3.layout.tree().links(nodes);
nodes.forEach(function(d, i) {
d.x = width/2 + i;
d.y = height/2 + 100 * d.depth;
});
root.fixed = true;
root.x = width / 2;
root.y = height / 2;
force.nodes(nodes)
.links(links)
.start();
var link = svg.selectAll("line")
.data(links)
.enter()
.insert("svg:line")
.attr("class", "link");
var node = svg.selectAll("circle.node")
.data(nodes)
.enter()
.append("svg:circle")
.attr("r", function(d) { return d.size/200; })
//.attr('fill', function(d) { return d.color; }) // Use Data colors
.attr('fill', function(d, i) { return colors(i); }) // Use D3 colors
.attr("class", "node")
.call(force.drag)
.on('click', function(){
d3.select( function (d){
return i.li;
})
.style('background', '#000')
})
//Adding an event - mouseover/mouseout
.on('mouseover', function(d) {
d3.select(this)
.transition()//Set transition
.style('stroke', '#222222')
.attr("r", function(d) { return (d.size/200) + 2; })
})
.on('mouseout', function(d) {
d3.select(this)
.transition()
.style('stroke', '#bfbfbf')
.attr("r", function(d) { return (d.size/200) - 2; })
d3.select('ul')
});
//Add a legend
var legend = d3.select('#key').append('div')
.append('ul')
.attr('class', 'legend')
.selectAll('ul')
.data(nodes)
.enter().append('li')
.style('background', '#ffffff')
.text(function(d) { return d.name; })
.on('mouseover', function(d) {
d3.select(this)
.transition().duration(200)//Set transition
.style('background', '#ededed')
})
.on('mouseout', function(d) {
d3.select(this)
.transition().duration(500)//Set transition
.style('background', '#ffffff')
})
.append('svg')
.attr('width', 10)
.attr('height', 10)
.style('float', 'right')
.style('margin-top', 4)
.append('circle')
.attr("r", 5)
.attr('cx', 5)
.attr('cy', 5)
.style('fill', function(d, i) { return colors(i); });
//Add Ticks
force.on("tick", function(e) {
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; });
});
//Center Node
var userCenter = d3.select("svg").append("svg:circle")
.attr('class', 'user')
.attr('r', 30)
.attr('cx', width/2)
.attr('cy', height/2)
.style('fill', '#bfbfbf')
var label = d3.select('svg').append("text")
.text('USER')
.attr('x', width/2)
.attr('y', height/2)
.attr('text-anchor','middle')
.attr('transform', 'translate(0, 5)')
.style('font-size','12px')
.attr('fill','#666666')
//Fix Root
function flatten(root) {
var nodes = [];
function recurse(node, depth) {
if (node.children) {
node.children.forEach(function(child) {
recurse(child, depth + 1);
});
}
node.depth = depth;
nodes.push(node);
}
recurse(root, 1);
return nodes;
}
//Data
function getData() {
return {
"name": "flare",
"size": 0,
"children": [
{ "name": "Jobs", "size": 3743 },
{ "name": "Contact", "size": 3302 },
{ "name": "Dietary", "size": 2903 },
{ "name": "Bookings", "size": 4823 },
{ "name": "Menu", "size": 3002 },
{ "name": "Cards", "size": 3120 },
{ "name": "Newsletter", "size": 3302 }
]
};
}
You should use the same event(mouseover, mouseout) functions for the nodes and legend items.
//Adding an event - mouseover/mouseout
.on('mouseover', onMouseover)
.on('mouseout', onMouseout);
...
//Legend
.on('mouseover', onMouseover)
.on('mouseout', onMouseout)
Then, you use the data passed to the functions to select the correct elements to change the style.
function onMouseover(elemData) {
d3.select("svg").selectAll("circle")
.select( function(d) { return d===elemData?this:null;})
.transition()//Set transition
.style('stroke', '#222222')
.attr("r", function(d) { return (d.size/200) + 2; })
d3.select('#key').selectAll('li')
.select( function(d) { return d===elemData?this:null;})
.transition().duration(200)//Set transition
.style('background', '#ededed')
}
function onMouseout(elemData) {
d3.select("svg").selectAll("circle")
.select( function(d) { return d===elemData?this:null;})
.transition()
.style('stroke', '#bfbfbf')
.attr("r", function(d) { return (d.size/200) - 2; })
d3.select('#key').selectAll('li')
.select( function(d) { return d===elemData?this:null;})
.transition().duration(500)//Set transition
.style('background', '#ffffff')
}
Here is the updated JSFiddle
Related
I am trying to wrap text which is parsed from a json response into my application.
I have two svg elements : rect and text. I want to find a way where I can wrap my svg text such that it fits in the rectangle.
( Picture Force layout with text labels and rectangles )
This is the link to the original project in which I have made modifications
Visualizing Reddit Discussions
setupGraph();
function setupGraph() {
$(".network").empty();
names = {};
nodecolor = {};
force = d3.layout.force()
.charge(-500)
.linkDistance(20)
.size([width, height]);
nodes = force.nodes(),
links = force.links();
force.on("tick", function() {
svg.selectAll("line.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;
});
svg.selectAll("rect.node")
.attr("x", function(d) {
return d.x - d.curWidth / 2;
})
.attr("y", function(d) {
return d.y - d.curHeight / 2;
});
svg.selectAll("text.node")
.attr("x", function(d) {
return d.x - d.curWidth / 2 + 8;
})
.attr("y", function(d) {
return d.y - d.curHeight / 2 + 20;
});
});
d3.select("svg").remove();
svg = d3.select("#chart").append("svg:svg")
.attr("width", width)
.attr("height", height)
.attr("class", "network");
}
function updateNetwork() {
var link = svg.selectAll("line.link")
.data(links, function(d) {
return d.source.id + "-" + d.target.id;
});
link.enter().insert("svg:line", "text.node", "rect.node")
.attr("class", "link")
.style("stroke-width", function(d) {
return 2;
})
.style("stroke", "gray")
.style("opacity", 0.1);
var node = svg.selectAll("rect.node")
.data(nodes, function(d) {
return d.id;
});
var node = svg.selectAll("text.node")
.data(nodes, function(d) {
return d.id;
});
var nodeEnter = node.enter().append("svg:rect")
.attr("class", "node")
.call(force.drag)
.attr("width", function(d) {
return d.curWidth;
})
.attr("height", function(d) {
return d.curHeight;
})
.style("opacity", 1.0)
.on("mouseover", displayTooltip)
.on("mousemove", moveTooltip)
.on("mouseout", removeTooltip)
.on("mouseover", function(d) {
d3.select(this).transition().attr("height", 100).attr("width", 100); //.style("fill", "red");
})
.call(force.drag)
var nodeEnterr = node.enter().append("svg:text")
.attr("class", "node")
.text(function(d) {
return d.name + ": " + d.body
})
.call(force.drag)
.style("opacity", 1.0)
.on("mouseover", displayTooltip)
.on("mousemove", moveTooltip)
.on("mouseout", removeTooltip)
.call(force.drag)
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.11/d3.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
I am working with d3 force diagrams at the moment, I am wanting to plot my child nodes around a parent node equally spaced, so for example if I have a parent node, and 4 linked child nodes, I would want each those node positioned at 90 degree intervals? Is that possible?
Here is my current force code,
app.force
.nodes(nodes)
.links(app.edges)
.on("tick", tick)
.start();
function tick(e) {
// console.log(link);
var k = 6 * e.alpha;
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; });
linkText
.attr("x", function(d) {
return ((d.source.x + d.target.x)/2);
})
.attr("y", function(d) {
return ((d.source.y + d.target.y)/2);
});
node.attr("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; });
node
.attr("cx", function(d) { return d.x })
.attr("cy", function(d) { return d.y })
}
app.force = d3.layout.force()
.charge(-300)
.linkDistance(85)
.size([width, height]);
//Where we will draw our visualisation
app.svg = d3.select(".visualisation").append("svg")
.attr('width', width)
.attr('height', height);
d3.layout.force() was not created with such customisation in mind. Of course you can set some parameters, but most of the positions are automatic calculated, and changing them can be very difficult (unless you create your own force function). Version 4.x is better in that matter, but not much.
In your specific case, you can set a very high (mathematically speaking, "very low", since it is negative) charge:
var force = d3.layout.force()
.charge(-3000)
But even doing that the angles are not exactly right angles, and they vary: if you click "run snippet" you can get an almost perfect cross, but if you click it again it's not that perfect the next time. And it will not work as expected if you have data with several levels of depth.
Here is a demo:
<script src="https://d3js.org/d3.v2.min.js?2.9.3"></script>
<style>
.link {
stroke: #aaa;
}
.node text {
stroke: #333;
cursor: pointer;
}
.node circle {
stroke: #fff;
stroke-width: 3px;
fill: #555;
}
</style>
<body>
<script>
var width = 400,
height = 300
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height);
var force = d3.layout.force()
.distance(50)
.charge(-3000)
.size([width, height]);
var json = {
"nodes": [{
"name": "node1"
}, {
"name": "node2"
}, {
"name": "node3"
}, {
"name": "node4"
}, {
"name": "node5"
}],
"links": [{
"source": 0,
"target": 1
}, {
"source": 0,
"target": 2
}, {
"source": 0,
"target": 3
}, {
"source": 0,
"target": 4
}]
};
force
.nodes(json.nodes)
.links(json.links)
.start();
var link = svg.selectAll(".link")
.data(json.links)
.enter().append("line")
.attr("class", "link")
.style("stroke-width", 2);
var node = svg.selectAll(".node")
.data(json.nodes)
.enter().append("g")
.attr("class", "node")
.call(force.drag);
node.append("circle")
.attr("r", 8);
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 + ")";
});
});
</script>
I have made a force directed graph which looks similar to this.
I would like the Nine Inch Nails node, in the centre, to be an image but the rest of the nodes to just be circles. Following this answer it seemed not too difficult but I just can't get my head around the combonation of svg, defs, patterns and d3.
My code is:
var simulation =
d3.forceSimulation()
.force("charge", d3.forceManyBody().strength(-50))
.force("collide", d3.forceCollide().radius(function (d) { return 15 - d.group}).strength(2).iterations(2))
.force("link", d3.forceLink().id(function(d, i) { return i;}).distance(20).strength(0.9))
.force("center", d3.forceCenter(width/2, height/2))
.force('X', d3.forceX(width/2).strength(0.15))
.force('Y', d3.forceY(height/2).strength(0.15));
var link = svg.append("g")
.attr("class", "links")
.selectAll("line")
.data(graph.links)
.enter().append("line")
var defs = svg.append('svg:defs');
defs.append("svg:pattern")
.attr("id", "vit-icon")
.attr("width", 48)
.attr("height", 48)
.attr("patternUnits", "userSpaceOnUse")
.append("svg:image")
.attr("xlink:href", "http://placekitten.com/g/48/48")
.attr("width", 48)
.attr("height", 48)
.attr("x", width/2)
.attr("y", height/2)
var node = svg.append("g")
.attr("class", "nodes")
.selectAll("circle")
.data(graph.nodes)
.enter().append("circle")
.attr("id", function(d, i) { return 'c'+i})
.attr("r", radius)
.attr("fill", function(d) {
if(d.group==0) {return "url(#vit-icon)";}
else {return color(d.group); }
})
.call(d3.drag()
.on("start", dragstarted)
.on("drag", dragged)
.on("end", dragended));
As I say, it seems straight forward in my mind. Basically what I think I'm trying to do is have the image in the svg pattern, then use an if statement to tell my root node to use the image url rather than fill with colour.
In dev tools I can see inspect the image and it shows the blue area it would take up and the node I want it to be associatated to has the 'url(#vit-icon)' as it's fill attribute. But it is not showing the image or any fill for that node.
What am I doing wrong? Or is this the complete wrong approach?
Thanks.
In your defs, just change:
.attr("x", width/2)
.attr("y", height/2)
To:
.attr("x", 0)
.attr("y", 0);
Here is a demo:
var nodes = [{
"id": 1,
}, {
"id": 2,
}, {
"id": 3,
}, {
"id": 4,
}, {
"id": 5,
}, {
"id": 6,
}, {
"id": 7,
}, {
"id": 8,
}];
var links = [{
source: 1,
target: 2
}, {
source: 1,
target: 3
}, {
source: 1,
target: 4
}, {
source: 2,
target: 5
}, {
source: 2,
target: 6
}, {
source: 1,
target: 7
}, {
source: 7,
target: 8
}];
var index = 10;
var svg = d3.select("svg"),
width = +svg.attr("width"),
height = +svg.attr("height"),
node,
link;
var defs = svg.append('svg:defs');
defs.append("svg:pattern")
.attr("id", "vit-icon")
.attr("width", 1)
.attr("height", 1)
.append("svg:image")
.attr("xlink:href", "http://66.media.tumblr.com/avatar_1c725152c551_128.png")
.attr("width", 48)
.attr("height", 48)
.attr("x", 0)
.attr("y", 0);
var simulation = d3.forceSimulation()
.force("link", d3.forceLink().id(function(d) {
return d.id;
}).distance(100))
.force("collide", d3.forceCollide(50))
.force("charge", d3.forceManyBody())
.force("center", d3.forceCenter(width / 2, height / 2));
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")
.call(d3.drag()
.on("start", dragstarted)
.on("drag", dragged)
.on("end", dragended));
node.append("circle")
.attr("r", d=> d.id === 1 ? 24 : 14)
.style("fill", function(d) {
if (d.id === 1) {
return "url(#vit-icon)";
} else {
return "teal"
}
})
simulation
.nodes(nodes)
.on("tick", ticked);
simulation.force("link")
.links(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("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);
d.fx = undefined;
d.fy = undefined;
}
.link {
stroke: #aaa;
}
.node {
pointer-events: all;
stroke: none;
stroke-width: 40px;
}
<script src="https://d3js.org/d3.v4.min.js"></script>
<svg width="500" height="300"></svg>
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'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