fading out text label as well as nodes in d3 - javascript

I have a filter function which fades out the rest of the nodes and highlights the selected set of nodes. I also want the labels associated to the nodes to reflect the same, i.e. fade out for the rest and only show the ones that are associated to the selected nodes. I have the following snippets:
// define properties of nodes
var node = g.append("g")
.attr("class", "nodes")
.selectAll("circle")
.data(graph.nodes)
.enter().append("circle")
.attr("class", "dataNodes")
.attr('id', function(d){ return 'id' + d.id; });
// define visual properties of node labels
var text = g.append("g")
.attr("class", "labels")
.selectAll("text")
.data(graph.nodes)
.enter().append("text")
.attr("font-size","6px")
.attr("dx", 6)
.attr('id', function(d){ return 'id' + d.id; })
.attr("dy", ".15em")
.text(function(d) {
return d.name;
});
function filterByName(relevantArray){
d3.selectAll(".dataNodes").transition().duration(toggleTime).style("opacity", 0.3);
d3.selectAll(".labels").transition().duration(toggleTime).style("opacity", 0.3);
d3.selectAll(relevantArray).transition().duration(toggleTime).style("opacity", 1);
}
The filter function is passed with a set of IDs which is used for setting the opacity of the nodes and labels. Since the ID of both the node and associated label is the same, why is only the node's properties getting affected by the function and not the label?

You just answered your own question here:
Since the ID of both the node and associated label is the same,...
IDs are unique. You cannot have two elements with the same ID.
Thus, set different IDs for the texts...
.attr('id', function(d){ return 'idCircle' + d.id; })
And for the circles...
.attr('id', function(d){ return 'idLabel' + d.id; })
However, in your case, to select both the circle and the text later, you can simply use class instead:
.attr('class', function(d){ return 'class' + d.id; })
Because, unlike IDs, you can have two elements with the same class and, therefore, you can use selectAll to select all of them:
d3.selectAll(".someClass")
.transition()
//etc

Related

D3 Changing the Attribute of an Individual Node

I have two d3 visualizations, and when I click on a link on the sankey diagram (defined by an email), I want to change the radius of the corresponding node (with the same email) on the force directed network graph. No matter what I try or search on the internet I cannot find a way to adjust the attribute of one individual node without selecting all the circles.
var link = svg.append("g").selectAll(".link")
.data(graph.links)
.enter().append("path")
.attr("class", "link")
.on("click", function (d,i){
svg2.selectAll("circle").each(function (f,i){
if (f.id == d.email)
{
//CHANGE RADIUS OF F or color or anything
//svg2.select(f).attr("r",10); DOESNT WORK
//f.attr("r",10) DOESNT WORK
}
});
})
.attr("d", path)
.style("stroke-width", function(d)
{ return Math.max(0.2, d.dy); })
.sort(function(a, b) { return b.dy - a.dy; });

How to get a subselection of a D3.js selection

I am trying to get a subselection of a given D3.js selection.
This part of the code creates the paths:
pieces.paths = pieces.groups
.append("path")
.attr("fill", function (d) { return d.data.color; });
Then, I set de "d" attribute:
pieces.paths
.attr("d", arc);
Working perfect. But pieces.paths has 3 elements, and I want to set the class of the first two elements to "highest". How may I do that?
selection.filter() is one option:
pieces.paths
.filter(function(d, i) {return i<2;})
.attr("class", "highest");

D3.js Force Layout: Dynamically added node doesn't move with rest of graph

I'm working on building a molecule creator in D3 using the original example created by Mike Bostock: http://bl.ocks.org/mbostock/3037015
I'm using a force layout just like in the example. My problem is when I add a new Node/atom dynamically, it doesn't move with the rest of the graph. I've read other questions and implemented everything that is suggested and have made sure that I'm following the proper update/join procedure that D3 requires and yet still the added carbon refuses to move with the rest of the graph.
Here is my update/create function:
function buildMolecule () {
// Update link data
link = link.data(links);
// Create new links
link.enter().append("g")
.attr("class", "link")
.each(function(d) {
d3.select(this)
.insert("line", ".node")
.style("stroke-width", function(d) { return (d.bond * 2 - 1) * 2 + "px"; });
d3.select(this)
.filter(function(d) { return d.bond > 1; }).append("line")
.attr("class", "separator");
d3.select(this)
.on("click", bondClicked);
});
// Delete removed links
link.exit().remove();
// Update node data
node = node.data(nodes);
// Create new nodes
node.enter().append("g")
.attr("class", "node")
.on("click", atomClicked)
.each(function(d) {
console.log('d:', d);
// Add node circle
d3.select(this)
.append("circle")
.attr("r", function(d) { return radius(d.size); })
.style("fill", function(d) { return color(d.atom); });
// Add atom symbol
d3.select(this)
.append("text")
.attr("dy", ".35em")
.attr("text-anchor", "middle")
.text(function(d) { return d.atom; });
d3.select(this).call(force.drag);
});
// Delete removed nodes
node.exit().remove();
force.start();
}
JsFiddle: http://jsfiddle.net/2dPMF/1/
Any help would be greatly appreciated!
You're modifying the data structures of the nodes and links beyond adding and deleting nodes, which messes up the force layout. I'm talking about these lines in particular.
function bigBang () {
links = links.concat(linksList);
nodes = nodes.concat(nodesList);
buildMolecule();
}
The first two lines in that function are what I'm talking about. Working jsfiddle here.

How to display names next to bubbles in d3js motion chart

In Mike Bostocks example http://bost.ocks.org/mike/nations/ there is so much data that putting the names of the countries there would make it chaotic, but for a smaller project I would like to display it.
I found this in the source:
var dot = svg.append("g")
.attr("class", "dots")
.selectAll(".dot")
.data(interpolateData(2004))
.enter().append("circle")
.attr("class", "dot")
.style("fill", function(d) { return color(d); })
.text(function(d) { return d.name; })
.call(position)
.sort(order);
dot.append("title")
.text(function(d) { return d.name; });
But somehow a title never shows up. Does anybody have an idea, how to display the name, next to the bubble?
As the other answer suggests, you need to group your elements together. In addition, you need to append a text element -- the title element only displays as a tooltip in SVG. The code you're looking for would look something like this.
var dot = svg.append("g")
.attr("class", "dots")
.selectAll(".dot")
.data(interpolateData(2004))
.enter()
.append("g")
.attr("class", "dot")
.call(position)
.sort(order);
dot.append("circle")
.style("fill", function(d) { return color(d); });
dot.append("text")
.attr("y", 10)
.text(function(d) { return d.name; });
In the call to position, you would need to set the transform attribute. You may have to adjust the coordinates of the text element.
Unfortunately grouping the text and circles together will not help in this case. The bubbles are moved by changing their position attributes (cx and cy), but elements do not have x and y positions to move. They can only be moved with a transform-translate. See: https://www.dashingd3js.com/svg-group-element-and-d3js
Your options here are:
1) rewrite the position function to calculate the position difference (change in x and change in y) between the elements current position and its new position and apply that to the . THIS WOULD BE VERY DIFFICULT.
or 2) Write a parallel set of instructions to setup and move the tags. Something like:
var tag = svg.append("g")
.attr("class", "tag")
.selectAll(".tag")
.data(interpolateData(2004))
.enter().append("text")
.attr("class", "tag")
.attr("text-anchor", "left")
.style("fill", function(d) { return color(d); })
.text(function(d) { return d.name; })
.call(tagposition)
.sort(order);
You will need a separate tagposition function since text needs 'x' and 'y' instead of 'cx', 'cy', and 'r' attributes. Don't forget to update the "displayYear" function to change the tag positions as well. You will probably want to offset the text from the bubbles, but making sure the text does not overlap is a much more complicated problem: http://bl.ocks.org/thudfactor/6688739
PS- I called them tags since 'label' already means something in that example.
you have to wrap the circle element and text together , it should look like
<country>
<circle ></circle>
<text></text>
</country>

adding labels to node in d3.js

I am a newbie in d3.js
I am trying to add labels to my nodes.
But whatever I tried is not working..
My code is here:
http://jsfiddle.net/Ymtg5/1/
Its a mash up between http://bl.ocks.org/christophermanning/4208494
and force directed graphs.
Basically I am reading a json file and creating the said graph.
Now I want to add labels to node exactly like http://bl.ocks.org/mbostock/950642
I tried adding these lines
node.append("text")
.attr("dx", 12)
.attr("dy", ".35em")
.text(function(d) { return d.name });
But its not working.
Any help. suggestions..
Thanks
Most probably the problem is that your JSON classes don't have a "name".
Right, this was not the problem
The relevant part of your code is as follows:
var node = svg.selectAll("path.node")
.data(nodes)
.enter().append("path").attr("class", "node")
.style("fill", function(d) { return fill(d.value); })
.style("stroke", function(d) { return d3.rgb(fill(d.value)).darker(); })
.call(force.drag);
// HERE should go node manipulation to add the text
force
.nodes(nodes)
.links(links)
.on("tick", tick)
.start();
function tick() {
//node.attr("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; );
node.attr("d", function(d) { return clip({"type":"F {"type":"Point","coordin...
link.attr("d", function(d) { return clip({"type":"Feature","geometry":{ ...
I have inserted a comment line where your node manipulation should go, if you want to add labels to the nodes. You are doing that inside the tick function (well, I think you are trying to do it there, the code isn't in the fiddle), and that function should be only for manipulation of the attr of the nodes. The place to create the text and append it to the node is outside of the function.

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