Develop Reference

Using d3 curvestep for a hierarchial structure

I am trying to build something similar to a hierachial structure using D3 and i am fairly new to this. This answer is what i am referring to accomplish it.
I referred the following links to get the links/connectors in this particular fashion
Using d3 curveStep
Using d3 linkVertical (linkRadial)
I keep getting the following error multiple times in developer console:
Error: <path> attribute d: Expected moveto path command ('M' or 'm'), "function line
Probably some error in my link function.
Following code is what i am using
var treeData =
{
"name": "Top Level",
"children": [
{
"name": "Level 2: A",
"children": [
{ "name": "Son of A" },
{ "name": "Daughter of A" }
]
},
{ "name": "Level 2: B" }
]
};
// Set the dimensions and margins of the diagram
var margin = {top: 20, right: 90, bottom: 30, left: 90},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
// append the svg object to the body of the page
// appends a 'group' element to 'svg'
// moves the 'group' element to the top left margin
var svg = d3.select("body").append("svg")
.attr("width", width + margin.right + margin.left)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate("
+ margin.left + "," + margin.top + ")");
var i = 0,
duration = 750,
root;
// declares a tree layout and assigns the size
var treemap = d3.tree().size([height, width]);
// Assigns parent, children, height, depth
root = d3.hierarchy(treeData, function(d) { return d.children; });
root.x0 = height / 2;
root.y0 = 0;
// Collapse after the second level
root.children.forEach(collapse);
update(root);
// Collapse the node and all it's children
function collapse(d) {
if(d.children) {
d._children = d.children
d._children.forEach(collapse)
d.children = null
}
}
function update(source) {
// Assigns the x and y position for the nodes
var treeData = treemap(root);
// Compute the new tree layout.
var nodes = treeData.descendants(),
links = treeData.descendants().slice(1);
// Normalize for fixed-depth.
nodes.forEach(function(d){ d.y = d.depth * 180});
// ****************** Nodes section ***************************
// Update the nodes...
var node = svg.selectAll('g.node')
.data(nodes, function(d) {return d.id || (d.id = ++i); });
// Enter any new modes at the parent's previous position.
var nodeEnter = node.enter().append('g')
.attr('class', 'node')
.attr("transform", function(d) {
return "translate(" + source.y0 + "," + source.x0 + ")";
})
.on('click', click);
// Add Circle for the nodes
nodeEnter.append('circle')
.attr('class', 'node')
.attr('r', 1e-6)
.style("fill", function(d) {
return d._children ? "lightsteelblue" : "#fff";
});
// Add labels for the nodes
nodeEnter.append('text')
.attr("dy", ".35em")
.attr("x", function(d) {
return d.children || d._children ? -13 : 13;
})
.attr("text-anchor", function(d) {
return d.children || d._children ? "end" : "start";
})
.text(function(d) { return d.data.name; });
// UPDATE
var nodeUpdate = nodeEnter.merge(node);
// Transition to the proper position for the node
nodeUpdate.transition()
.duration(duration)
.attr("transform", function(d) {
return "translate(" + d.y + "," + d.x + ")";
});
// Update the node attributes and style
nodeUpdate.select('circle.node')
.attr('r', 10)
.style("fill", function(d) {
return d._children ? "lightsteelblue" : "black";
})
.attr('cursor', 'pointer');
// Remove any exiting nodes
var nodeExit = node.exit().transition()
.duration(duration)
.attr("transform", function(d) {
return "translate(" + source.y + "," + source.x + ")";
})
.remove();
// On exit reduce the node circles size to 0
nodeExit.select('circle')
.attr('r', 1e-6);
// On exit reduce the opacity of text labels
nodeExit.select('text')
.style('fill-opacity', 1e-6);
// ****************** links section ***************************
// Update the links...
var link = svg.selectAll('path.link')
.data(links, function(d) { return d.id; });
// Enter any new links at the parent's previous position.
var linkEnter = link.enter().insert('path', "g")
.attr("class", "link")
.attr('d', function(d){
//var o = {x: source.x0, y: source.y0}
return diagonal(source.x0, d.y, d)
});
// UPDATE
var linkUpdate = linkEnter.merge(link);
// Transition back to the parent element position
linkUpdate.transition()
.duration(duration)
.attr('d', function(d){
//return diagonal(d, d.parent)
return diagonal(d.x, d.parent.y)
});
// Remove any exiting links
var linkExit = link.exit().transition()
.duration(duration)
.attr('d', function(d) {
var o = {x: source.x, y: source.y}
return diagonal(o, o)
})
.remove();
// Store the old positions for transition.
nodes.forEach(function(d){
d.x0 = d.x;
d.y0 = d.y;
});
// Creates a curved (diagonal) path from parent to the child nodes
/*function diagonal(s, d) {
var path = `M ${s.y} ${s.x}
C ${(s.y + d.y) / 2} ${s.x},
${(s.y + d.y) / 2} ${d.x},
${d.y} ${d.x}`
return path
}*/
function diagonal(s, d) {
var link = d3.line()
.x((x) => xScale(x))
.y((y) => yScale(y))
.curve(d3.curveStep);
return link;
}
// Toggle children on click.
function click(d) {
if (d.children) {
d._children = d.children;
d.children = null;
} else {
d.children = d._children;
d._children = null;
}
update(d);
}
}
<style>
.node circle {
fill: #fff;
stroke: steelblue;
stroke-width: 3px;
}
.node text {
font: 12px sans-serif;
}
.link {
fill: none;
stroke: #ccc;
stroke-width: 2px;
}
</style>
<script src="https://d3js.org/d3.v4.min.js"></script>
I have commented existing diagonal function and tried to introduce curveStep of D3. I have also tweaked a few things related to how the inputs are being passed to the diagonal function.

The issue you have is that d3.line accepts an array of points. You don't end up passing an array to d3.line anywhere.
Your diagonal function should look something like:
function diagonal(array) {
let line = d3.line()
.x(function(d) { return d.y; })
.y(function(d) { return d.x; }) // inverted x/y as you have a horizontal tree
.curve(d3.curveStep);
return line(array);
}
Normally, each link datum is an object, with properties for source and target, we need to pass an array containing both source and target to the diagonal function:
.attr("d", function(d) {
return diagonal([d.source,d.target])
})
Or an equivalent array.
As you've used nodes themselves as the link data, we can still use the same principle with:
.attr("d", function(d) {
return diagonal([d,d.parent])
})
Or, construct an array with objects that have x/y properties. In your case we'll need to construct some objects to represent points for the line generator as you're storing old positioning data we need to access:
Eg:
var treeData =
{
"name": "Top Level",
"children": [
{
"name": "Level 2: A",
"children": [
{ "name": "Son of A" },
{ "name": "Daughter of A" }
]
},
{ "name": "Level 2: B" }
]
};
// Set the dimensions and margins of the diagram
var margin = {top: 20, right: 90, bottom: 30, left: 90},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
// append the svg object to the body of the page
// appends a 'group' element to 'svg'
// moves the 'group' element to the top left margin
var svg = d3.select("body").append("svg")
.attr("width", width + margin.right + margin.left)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate("
+ margin.left + "," + margin.top + ")");
var i = 0,
duration = 750,
root;
// declares a tree layout and assigns the size
var treemap = d3.tree().size([height, width]);
// Assigns parent, children, height, depth
root = d3.hierarchy(treeData, function(d) { return d.children; });
root.x0 = height / 2;
root.y0 = 0;
// Collapse after the second level
root.children.forEach(collapse);
update(root);
// Collapse the node and all it's children
function collapse(d) {
if(d.children) {
d._children = d.children
d._children.forEach(collapse)
d.children = null
}
}
function update(source) {
// Assigns the x and y position for the nodes
var treeData = treemap(root);
// Compute the new tree layout.
var nodes = treeData.descendants(),
links = treeData.descendants().slice(1);
// Normalize for fixed-depth.
nodes.forEach(function(d){ d.y = d.depth * 180});
// ****************** Nodes section ***************************
// Update the nodes...
var node = svg.selectAll('g.node')
.data(nodes, function(d) {return d.id || (d.id = ++i); });
// Enter any new modes at the parent's previous position.
var nodeEnter = node.enter().append('g')
.attr('class', 'node')
.attr("transform", function(d) {
return "translate(" + source.y0 + "," + source.x0 + ")";
})
.on('click', click);
// Add Circle for the nodes
nodeEnter.append('circle')
.attr('class', 'node')
.attr('r', 1e-6)
.style("fill", function(d) {
return d._children ? "lightsteelblue" : "#fff";
});
// Add labels for the nodes
nodeEnter.append('text')
.attr("dy", ".35em")
.attr("x", function(d) {
return d.children || d._children ? -13 : 13;
})
.attr("text-anchor", function(d) {
return d.children || d._children ? "end" : "start";
})
.text(function(d) { return d.data.name; });
// UPDATE
var nodeUpdate = nodeEnter.merge(node);
// Transition to the proper position for the node
nodeUpdate.transition()
.duration(duration)
.attr("transform", function(d) {
return "translate(" + d.y + "," + d.x + ")";
});
// Update the node attributes and style
nodeUpdate.select('circle.node')
.attr('r', 10)
.style("fill", function(d) {
return d._children ? "lightsteelblue" : "black";
})
.attr('cursor', 'pointer');
// Remove any exiting nodes
var nodeExit = node.exit().transition()
.duration(duration)
.attr("transform", function(d) {
return "translate(" + source.y + "," + source.x + ")";
})
.remove();
// On exit reduce the node circles size to 0
nodeExit.select('circle')
.attr('r', 1e-6);
// On exit reduce the opacity of text labels
nodeExit.select('text')
.style('fill-opacity', 1e-6);
// ****************** links section ***************************
// Update the links...
var link = svg.selectAll('path.link')
.data(links, function(d) { return d.id; });
// Enter any new links at the parent's previous position.
var linkEnter = link.enter().insert('path', "g")
.attr("class", "link")
.attr('d', function(d){
//var o = {x: source.x0, y: source.y0}
return diagonal([{x: d.parent.x0, y: d.parent.y0 },{x: d.parent.x0, y: d.parent.y0 }])
});
// UPDATE
var linkUpdate = linkEnter.merge(link);
// Transition back to the parent element position
linkUpdate.transition()
.duration(duration)
.attr('d', function(d){
//return diagonal(d, d.parent)
return diagonal([{x:d.parent.x, y: d.parent.y}, d]) // changes here
});
// Remove any exiting links
var linkExit = link.exit().transition()
.duration(duration)
.attr('d', function(d) {
var o = {x: source.x, y: source.y}
return diagonal([o,o]) // changes here
})
.remove();
// Store the old positions for transition.
nodes.forEach(function(d){
d.x0 = d.x;
d.y0 = d.y;
});
// changes to diagonal function:
function diagonal(array) {
var link = d3.line()
.x((d) => d.y)
.y((d) => d.x)
.curve(d3.curveStep);
return link(array);
}
// Toggle children on click.
function click(d) {
if (d.children) {
d._children = d.children;
d.children = null;
} else {
d.children = d._children;
d._children = null;
}
update(d);
}
}
<style>
.node circle {
fill: #fff;
stroke: steelblue;
stroke-width: 3px;
}
.node text {
font: 12px sans-serif;
}
.link {
fill: none;
stroke: #ccc;
stroke-width: 2px;
}
</style>
<script src="https://d3js.org/d3.v4.min.js"></script>

Add two possible paths with "window.location.href " under the same condition

I created an interactive tree diagram using the library d3.js and I'm now trying to add the functionality that whenever you click on a node, it redirects you to the page of this element (corresponding to a node).
Previously, I only had elements of type "product" and used this function:
function clack(d) {
if (d.name != "Product Catalog"){
window.location.href = "http://1XX.XX.1.XX/App/redirect?entity_type=product&field_name=itemId&field_value=" + d.id;
}
}
And it worked perfectly!
HOWEVER, I now added another type of elements called "risk_coverages" that are the children of the products, but want to be redirected to the path of those two elements.
In fact, the function for my new entity type "risk_coverages" only would be:
function clack(d) {
if (d.name != "Product Catalog"){
window.location.href = "http://1XX.XX.1.XX/App/redirect?entity_type=risk_coverages&field_name=itemId&field_value=" + d.id;
}
}
My problem is that I don't know how to make the condition for:
IF "entity_type=product&field_name=itemId&field_value=" + d.id , THEN redirect me to my product page
OR
IF "entity_type=risk_coverages&field_name=itemId&field_value=" + d.id , THEN redirect me to my risk coverage page
In English, it would be:
IF it's a product, then look for this product and display its page
OR
IF it's a risk coverage, then look for this risk coverage and display its page
I hope I was clear enough.
Any help would be greatly appreciated!!
Thanks a lot,
Allan
Here is the full code:
<style>
.node, .clickable {
cursor: pointer;
}
.node circle {
fill: #fff;
stroke: steelblue;
stroke-width: 1.5px;
}
.node text:hover {
text-decoration: underline;
}
.node text {
font: 100% sans-serif;
}
.link {
fill: none;
stroke: #ccc;
stroke-width: 1.5px;
}
</style>
Click on a node to expand the tree. Click on a product name to navigate to the product's detail page.
<tree>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script>
var margin = {top: 20, right: 140, bottom: 20, left: 120},
width = 2200 - margin.right - margin.left,
height = 1000 - margin.top - margin.bottom;
var i = 0,
duration = 750,
root;
var tree = d3.layout.tree()
.size([height, width]);
var diagonal = d3.svg.diagonal()
.projection(function(d) { return [d.y, d.x]; });
var svg = d3.select("tree").append("svg")
.attr("width", width + margin.right + margin.left)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
d3.json("/App/assets/tree.json", function(error, flare) {
root = flare;
root.x0 = height / 2;
root.y0 = 0;
function collapse(d) {
if (d.children) {
d._children = d.children;
d._children.forEach(collapse);
d.children = null;
}
}
root.children.forEach(collapse);
update(root);
});
d3.select(self.frameElement).style("height", "800px");
function update(source) {
// Compute the new tree layout.
var nodes = tree.nodes(root).reverse(),
links = tree.links(nodes);
// Normalize for fixed-depth.
nodes.forEach(function(d) { d.y = d.depth * 250; });
// Update the nodes…
var node = svg.selectAll("g.node")
.data(nodes, function(d) { return d.id || (d.id = ++i); });
// Enter any new nodes at the parent's previous position.
var nodeEnter = node.enter().append("g")
.attr("class", "node")
.attr("transform", function(d) { return "translate(" + source.y0 + "," + source.x0 + ")"; })
;
nodeEnter.append("circle")
.attr("r", 1e-6)
.style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; })
.on("click", click)
;
nodeEnter.append("text")
.attr("x", function(d) { return d.children || d._children ? -10 : 10; })
.attr("dy", ".35em")
.attr("text-anchor", function(d) { return d.children || d._children ? "end" : "start"; })
.text(function(d) { return d.name; })
.style("fill-opacity", 1e-6)
.attr("class", "hyper").on("click", clack);
// Transition nodes to their new position.
var nodeUpdate = node.transition()
.duration(duration)
.attr("transform", function(d) { return "translate(" + d.y + "," + d.x + ")"; });
nodeUpdate.select("circle")
.attr("r", 4.5)
.style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; });
nodeUpdate.select("text")
.style("fill-opacity", 1);
// Transition exiting nodes to the parent's new position.
var nodeExit = node.exit().transition()
.duration(duration)
.attr("transform", function(d) { return "translate(" + source.y + "," + source.x + ")"; })
.remove();
nodeExit.select("circle")
.attr("r", 1e-6);
nodeExit.select("text")
.style("fill-opacity", 1e-6);
// Update the links…
var link = svg.selectAll("path.link")
.data(links, function(d) { return d.target.id; });
// Enter any new links at the parent's previous position.
link.enter().insert("path", "g")
.attr("class", "link")
.attr("d", function(d) {
var o = {x: source.x0, y: source.y0};
return diagonal({source: o, target: o});
});
// Transition links to their new position.
link.transition()
.duration(duration)
.attr("d", diagonal);
// Transition exiting nodes to the parent's new position.
link.exit().transition()
.duration(duration)
.attr("d", function(d) {
var o = {x: source.x, y: source.y};
return diagonal({source: o, target: o});
})
.remove();
// Stash the old positions for transition.
nodes.forEach(function(d) {
d.x0 = d.x;
d.y0 = d.y;
});
}
//collapse function
function collapse(d) {
if (d.children) {
d._children = d.children;
d._children.forEach(collapse);
d.children = null;
}
}
// Toggle children on click.
function click(d) {
if (d.children) {
d._children = d.children;
d.children = null;
} else {
d.children = d._children;
d._children = null;
}
if (d.parent) {
//console.log(d.parent.children);
//collapse(d.parent.children[0]);
d.parent.children.forEach(function(element) {
if (d !== element) {
collapse(element);
}
});
}
update(d);
}
function clack(d) {
if (d.name != "Product Catalog"){
window.location.href = "http://1XX.XX.1X.XX/App/redirect?entity_type=risk_coverages&field_name=itemId&field_value=" + d.id;
}
}
</script>
`

Tree with children towards multiple side in d3.js (similar to family tree)

var treeData = [{
"name": "Device",
"parent": "null"
}
];
var treeData2 = [{
"name": "Device",
"parent": "null"
}
];
$(document).ready(function() {
var margin = {
top: 20,
right: 120,
bottom: 20,
left: 120
},
width = 1260 - margin.right - margin.left,
height = 500 - margin.top - margin.bottom;
var i = 0,
duration = 750,
root;
var tree = d3.layout.tree()
.size([height, width]);
var diagonal = d3.svg.diagonal()
.projection(function(d) {
return [d.y, d.x];
});
var svg = d3.select("body").append("svg")
.attr("width", width + margin.right + margin.left)
.attr("height", height + margin.top + margin.bottom);
makeRightTree();
makeLeftTree();
});
function makeRightTree() {
// ************** Generate the tree diagram *****************
var margin = {
top: 20,
right: 120,
bottom: 20,
left: 120
},
width = 1260 - margin.right - margin.left,
height = 500 - margin.top - margin.bottom;
var i = 0,
duration = 750,
root;
var tree = d3.layout.tree()
.size([height, width]);
var diagonal = d3.svg.diagonal()
.projection(function(d) {
return [d.y, d.x];
});
var svg = d3.select("svg").append("g")
.attr("transform", "translate(600,0)");
root = treeData[0];
root.x0 = height / 2;
root.y0 = 0;
update(root);
function update(source) {
// Compute the new tree layout.
var nodes = tree.nodes(root).reverse(),
links = tree.links(nodes);
// Normalize for fixed-depth.
nodes.forEach(function(d) {
d.y = d.depth * 180;
});
// Update the nodes…
var node = svg.selectAll("g.node")
.data(nodes, function(d) {
return d.id || (d.id = ++i);
});
// Enter any new nodes at the parent's previous position.
var nodeEnter = node.enter().append("g")
.attr("class", function(d) {
if (d.parent == "null") {
return "node rightparent" //since its root its parent is null
} else
return "node rightchild" //all nodes with parent will have this class
})
.attr("transform", function(d) {
return "translate(" + source.y0 + "," + source.x0 + ")";
})
.on("click", click);
nodeEnter.append("rect")
.attr("x", "-10")
.attr("y", "-15")
.attr("height", 30)
.attr("width", 100)
.attr("rx", 15)
.attr("ry", 15)
.style("fill", "#f1f1f1");
nodeEnter.append("text")
.attr("x", function(d) {
return d.children || d._children ? -13 : 13;
})
.attr("dy", ".35em")
.attr("text-anchor", function(d) {
return d.children || d._children ? "end" : "start";
})
.text(function(d) {
return d.name;
})
.style("fill-opacity", 1e-6);
var addRightChild = nodeEnter.append("g");
addRightChild.append("rect")
.attr("x", "90")
.attr("y", "-10")
.attr("height", 20)
.attr("width", 20)
.attr("rx", 10)
.attr("ry", 10)
.style("stroke", "#444")
.style("stroke-width", "2")
.style("fill", "#ccc");
addRightChild.append("line")
.attr("x1", 95)
.attr("y1", 1)
.attr("x2", 105)
.attr("y2", 1)
.attr("stroke", "#444")
.style("stroke-width", "2");
addRightChild.append("line")
.attr("x1", 100)
.attr("y1", -4)
.attr("x2", 100)
.attr("y2", 6)
.attr("stroke", "#444")
.style("stroke-width", "2");
// Transition nodes to their new position.
var nodeUpdate = node.transition()
.duration(duration)
.attr("transform", function(d) {
return "translate(" + d.y + "," + d.x + ")";
});
nodeUpdate.select("circle")
.attr("r", 10)
.style("fill", function(d) {
return d._children ? "lightsteelblue" : "#fff";
});
nodeUpdate.select("text")
.style("fill-opacity", 1);
// Transition exiting nodes to the parent's new position.
var nodeExit = node.exit().transition()
.duration(duration)
.attr("transform", function(d) {
return "translate(" + source.y + "," + source.x + ")";
})
.remove();
nodeExit.select("circle")
.attr("r", 1e-6);
nodeExit.select("text")
.style("fill-opacity", 1e-6);
// Update the links…
var link = svg.selectAll("path.link")
.data(links, function(d) {
return d.target.id;
});
// Enter any new links at the parent's previous position.
link.enter().insert("path", "g")
.attr("class", "link")
.attr("d", function(d) {
var o = {
x: source.x0,
y: source.y0
};
return diagonal({
source: o,
target: o
});
}).on("click", removelink);
function removelink(d) {
//this is the links target node which you want to remove
var target = d.target;
//make new set of children
var children = [];
//iterate through the children
target.parent.children.forEach(function(child) {
if (child.id != target.id) {
//add to teh child list if target id is not same
//so that the node target is removed.
children.push(child);
}
});
//set the target parent with new set of children sans the one which is removed
target.parent.children = children;
//redraw the parent since one of its children is removed
update(d.target.parent)
}
// Transition links to their new position.
link.transition()
.duration(duration)
.attr("d", diagonal);
// Transition exiting nodes to the parent's new position.
link.exit().transition()
.duration(duration)
.attr("d", function(d) {
var o = {
x: source.x,
y: source.y
};
return diagonal({
source: o,
target: o
});
})
.remove();
// Stash the old positions for transition.
nodes.forEach(function(d) {
d.x0 = d.x;
d.y0 = d.y;
});
addRightChild.on("click", function(d) {
event.stopPropagation();
$("#child-info").show();
$("#child-text").val("");
$("#btn-add-child").off('click');
$("#btn-add-child").click(function() {
var childname = $("#child-text").val();
if (typeof d.children === 'undefined') {
var newChild = [{
"name": childname,
"parent": "Son Of A",
}];
console.log(tree.nodes(newChild[0]));
var newnodes = tree.nodes(newChild);
d.children = newnodes[0];
console.log(d.children);
update(d);
} else {
var newChild = {
"name": childname,
"parent": "Son Of A",
};
console.log(d.children);
d.children.push(newChild);
console.log(d.children);
update(d);
}
$("#child-info").hide();
});
});;
}
// Toggle children on click.
function click(d) {
// console.log(d);
// if (d.children) {
// d._children = d.children;
// d.children = null;
// } else {
// d.children = d._children;
// d._children = null;
// }
// update(d);
}
}
function makeLeftTree() {
// ************** Generate the tree diagram *****************
var margin = {
top: 20,
right: 120,
bottom: 20,
left: 120
},
width = 1260 - margin.right - margin.left,
height = 500 - margin.top - margin.bottom;
var i = 0,
duration = 750,
root;
var tree = d3.layout.tree()
.size([height, width]);
var diagonal = d3.svg.diagonal()
.projection(function(d) {
return [d.y, d.x];
});
var svg = d3.select("svg").append("g")
.attr("transform", "translate(-421,0)");
root = treeData2[0];
root.x0 = height / 2;
root.y0 = width;
update(root);
function update(source) {
// Compute the new tree layout.
var nodes = tree.nodes(root).reverse(),
links = tree.links(nodes);
// Normalize for fixed-depth.
nodes.forEach(function(d) {
d.y = width - (d.depth * 180);
});
// Update the nodes…
var node = svg.selectAll("g.node")
.data(nodes, function(d) {
return d.id || (d.id = ++i);
});
// Enter any new nodes at the parent's previous position.
var nodeEnter = node.enter().append("g")
.attr("class", function(d) {
if (d.parent == "null") {
return "node leftparent" //since its root its parent is null
} else
return "node leftchild" //all nodes with parent will have this class
})
.attr("transform", function(d) {
return "translate(" + source.y0 + "," + source.x0 + ")";
})
.on("click", click);
nodeEnter.append("rect")
.attr("x", "-10")
.attr("y", "-15")
.attr("height", 30)
.attr("width", 100)
.attr("rx", 15)
.attr("ry", 15)
.style("fill", "#f1f1f1");
nodeEnter.append("text")
.attr("x", function(d) {
return d.children || d._children ? -13 : 13;
})
.attr("dy", ".35em")
.attr("text-anchor", function(d) {
return d.children || d._children ? "end" : "start";
})
.text(function(d) {
return d.name;
})
.style("fill-opacity", 1e-6);
var addLeftChild = nodeEnter.append("g");
addLeftChild.append("rect")
.attr("x", "-30")
.attr("y", "-10")
.attr("height", 20)
.attr("width", 20)
.attr("rx", 10)
.attr("ry", 10)
.style("stroke", "#444")
.style("stroke-width", "2")
.style("fill", "#ccc");
addLeftChild.append("line")
.attr("x1", -25)
.attr("y1", 1)
.attr("x2", -15)
.attr("y2", 1)
.attr("stroke", "#444")
.style("stroke-width", "2");
addLeftChild.append("line")
.attr("x1", -20)
.attr("y1", -4)
.attr("x2", -20)
.attr("y2", 6)
.attr("stroke", "#444")
.style("stroke-width", "2");
// Transition nodes to their new position.
var nodeUpdate = node.transition()
.duration(duration)
.attr("transform", function(d) {
return "translate(" + d.y + "," + d.x + ")";
});
nodeUpdate.select("circle")
.attr("r", 10)
.style("fill", function(d) {
return d._children ? "lightsteelblue" : "#fff";
});
nodeUpdate.select("text")
.style("fill-opacity", 1);
// Transition exiting nodes to the parent's new position.
var nodeExit = node.exit().transition()
.duration(duration)
.attr("transform", function(d) {
return "translate(" + source.y + "," + source.x + ")";
})
.remove();
nodeExit.select("circle")
.attr("r", 1e-6);
nodeExit.select("text")
.style("fill-opacity", 1e-6);
// Update the links…
var link = svg.selectAll("path.link")
.data(links, function(d) {
return d.target.id;
});
// Enter any new links at the parent's previous position.
link.enter().insert("path", "g")
.attr("class", "link")
.attr("d", function(d) {
var o = {
x: source.x0,
y: source.y0
};
return diagonal({
source: o,
target: o
});
}).on("click", removelink);
function removelink(d) {
//this is the links target node which you want to remove
var target = d.target;
//make new set of children
var children = [];
//iterate through the children
target.parent.children.forEach(function(child) {
if (child.id != target.id) {
//add to teh child list if target id is not same
//so that the node target is removed.
children.push(child);
}
});
//set the target parent with new set of children sans the one which is removed
target.parent.children = children;
//redraw the parent since one of its children is removed
update(d.target.parent)
}
// Transition links to their new position.
link.transition()
.duration(duration)
.attr("d", diagonal);
// Transition exiting nodes to the parent's new position.
link.exit().transition()
.duration(duration)
.attr("d", function(d) {
var o = {
x: source.x,
y: source.y
};
return diagonal({
source: o,
target: o
});
})
.remove();
// Stash the old positions for transition.
nodes.forEach(function(d) {
d.x0 = d.x;
d.y0 = d.y;
});
addLeftChild.on("click", function(d) {
event.stopPropagation();
$("#child-info").show();
$("#child-text").val("");
$("#btn-add-child").off('click');
$("#btn-add-child").click(function() {
var childname = $("#child-text").val();
if (typeof d.children === 'undefined') {
var newChild = [{
"name": childname,
"parent": "Son Of A",
}];
console.log(tree.nodes(newChild[0]));
var newnodes = tree.nodes(newChild);
d.children = newnodes[0];
console.log(d.children);
update(d);
} else {
var newChild = {
"name": childname,
"parent": "Son Of A",
};
console.log(d.children);
d.children.push(newChild);
console.log(d.children);
update(d);
}
$("#child-info").hide();
});
});;
}
// Toggle children on click.
function click(d) {
// console.log(d);
// if (d.children) {
// d._children = d.children;
// d.children = null;
// } else {
// d.children = d._children;
// d._children = null;
// }
// update(d);
}
}
#child-info {
width: 100px;
height: 50px;
height: auto;
position: fixed;
padding: 10px;
display: none;
left: 40%;
}
#btn-add-child {} .control-bar {
min-height: 50px;
padding: 10px 0px;
background: #f1f1f1;
border-bottom: 1px solid #ccc;
box-shadow: 0 3px 2px -2px rgba(200, 200, 200, 0.2);
color: #666;
}
.asset-title {
padding: 15px;
float: left;
}
.control-buttons {
float: right;
padding: 10px;
}
.control-buttons button {
border: none;
border-radius: 0px;
background: #fff;
color: #666;
height: 30px;
width: 30px;
}
.node {
cursor: pointer;
}
.node circle {
fill: #fff;
stroke: steelblue;
stroke-width: 3px;
}
.node text {
font: 12px sans-serif;
}
.link {
fill: none;
stroke: #85e0e0;
stroke-width: 2px;
}
.rightparent>rect {
display: none;
}
.leftparent>rect {
fill: #f1f1f1;
stroke: #ccc;
stroke-width: 2;
}
<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>
<div id="child-info" style="display:none">
<input type="text" id="child-text" placeholder="child name">
<button id="btn-add-child">add</button>
</div>
I'm trying to learn d3.js for the purpose of making a structure that looks like this. Where i can add and remove nodes dynamically , and i have been partially successful. ( with the help of lots of geeks here in stack overflow).
code snippet is as follows. The following has been achieved with two trees placed back to back. One tree - right oriented and other left oriented. The root node of both the trees are superposed.
The current working is as follows.
Click plus on the respective side to add a node , click on the link to remove the node and it's children. If you check the working sample code snippet it may work well initially.
But since the two trees are separate entity , once both sides becomes highly asymmetric the position of two root nodes will be different and two nodes are visible. ( one of them will be hidden but you can see the links starting from a different point - to see this issue try adding a few nodes on one side until it's root node position changes ). Something like this.
Now my question
Am I going the wrong way here ? Is there a way to directly convert a single json file into such a structure. I researched a lot and found this
wonderful answer on making family tree by Cyril. But I guess this case is different. Is there a way to make this structure directly ?
Or is there a way to move the nodes together based on movement of one node ?
Any guidance is highly appreciated.

To do this you will need to fix the root node.
This is how to fix the left/right roots.
Inside the function makeLeftTree.
oldlx = root.x0 = height / 2; //store the center x position
oldly = root.y0 = width; //store the center y position
Inside the function makeRightTree.
oldrx = root.x0 = height / 2; //store the center x position
oldry = root.y0 = width; //store the center y position
Then in the left node update you update the node position with the stored position.
var nodeUpdate = node.transition()
.duration(duration)
.attr("transform", function(d) {
if (d.parent =="null"){
d.y = oldly;
d.x = oldlx;
}
return "translate(" + d.y + "," + d.x + ")";
});
Same in the right node update you update the node position with the stored position.
var nodeUpdate = node.transition()
.duration(duration)
.attr("transform", function(d) {
if (d.parent =="null"){
d.y = oldry;
d.x = oldrx;
}
return "translate(" + d.y + "," + d.x + ")";
});
Working code here

Using a variable instead of an external file for d3 script

Am really way out of my comfort zone here - trying to get a representation of a tree using Mike Bostocks collapsible tree. (original on http://bl.ocks.org/mbostock/4339083).
I have the code working, and referencing to my own json data file works, but I need the data in a variable instead of an external file. (due to limitations of the platform I'm using the visualisation on).
The following code calls a file called Objecttree.json, and I want to replace this with a similarly named variable called Objecttree.
It must be deadsimple, but I've searched the existing answers and am not able to use the answers given in my code. I guess skills are even below the lowest noob-threshold, so please keep that in mind!
anyway, thanks in advance.
<meta charset="utf-8">
<style>
.node {
cursor: pointer;
}
.node circle {
fill: #fff;
stroke: steelblue;
stroke-width: 1.5px;
}
.node text {
font: 10px sans-serif;
}
.link {
fill: none;
stroke: #ccc;
stroke-width: 1.5px;
}
</style>
<body>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script>
var margin = {top: 20, right: 120, bottom: 20, left: 120},
width = 3000 - margin.right - margin.left,
height = 1000 - margin.top - margin.bottom;
var i = 0,
duration = 750,
root;
var tree = d3.layout.tree()
.size([height, width]);
var diagonal = d3.svg.diagonal()
.projection(function(d) { return [d.y, d.x]; });
var svg = d3.select("body").append("svg")
.attr("width", width + margin.right + margin.left)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
d3.json("Objecttree.json", function(error, flare) {
root = flare;
root.x0 = height / 2;
root.y0 = 0;
function collapse(d) {
if (d.children) {
d._children = d.children;
d._children.forEach(collapse);
d.children = null;
}
}
root.children.forEach(collapse);
update(root);
});
d3.select(self.frameElement).style("height", "800px");
function update(source) {
// Compute the new tree layout.
var nodes = tree.nodes(root).reverse(),
links = tree.links(nodes);
// Normalize for fixed-depth.
nodes.forEach(function(d) { d.y = d.depth * 180; });
// Update the nodes…
var node = svg.selectAll("g.node")
.data(nodes, function(d) { return d.id || (d.id = ++i); });
// Enter any new nodes at the parent's previous position.
var nodeEnter = node.enter().append("g")
.attr("class", "node")
.attr("transform", function(d) { return "translate(" + source.y0 + "," + source.x0 + ")"; })
.on("click", click);
nodeEnter.append("circle")
.attr("r", 1e-6)
.style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; });
nodeEnter.append("text")
.attr("x", function(d) { return d.children || d._children ? -10 : 10; })
.attr("dy", ".35em")
.attr("text-anchor", function(d) { return d.children || d._children ? "end" : "start"; })
.text(function(d) { return d.name; })
.style("fill-opacity", 1e-6);
// Transition nodes to their new position.
var nodeUpdate = node.transition()
.duration(duration)
.attr("transform", function(d) { return "translate(" + d.y + "," + d.x + ")"; });
nodeUpdate.select("circle")
.attr("r", 4.5)
.style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; });
nodeUpdate.select("text")
.style("fill-opacity", 1);
// Transition exiting nodes to the parent's new position.
var nodeExit = node.exit().transition()
.duration(duration)
.attr("transform", function(d) { return "translate(" + source.y + "," + source.x + ")"; })
.remove();
nodeExit.select("circle")
.attr("r", 1e-6);
nodeExit.select("text")
.style("fill-opacity", 1e-6);
// Update the links…
var link = svg.selectAll("path.link")
.data(links, function(d) { return d.target.id; });
// Enter any new links at the parent's previous position.
link.enter().insert("path", "g")
.attr("class", "link")
.attr("d", function(d) {
var o = {x: source.x0, y: source.y0};
return diagonal({source: o, target: o});
});
// Transition links to their new position.
link.transition()
.duration(duration)
.attr("d", diagonal);
// Transition exiting nodes to the parent's new position.
link.exit().transition()
.duration(duration)
.attr("d", function(d) {
var o = {x: source.x, y: source.y};
return diagonal({source: o, target: o});
})
.remove();
// Stash the old positions for transition.
nodes.forEach(function(d) {
d.x0 = d.x;
d.y0 = d.y;
});
}
// Toggle children on click.
function click(d) {
if (d.children) {
d._children = d.children;
d.children = null;
} else {
d.children = d._children;
d._children = null;
}
update(d);
}
</script>

Try this one:
var Objecttree = '{"type":"Topology","transform":{"scale":[0.06690766172651032,0.060532461291637356],"translate":[-7.240804475075604,51.182450466981884]},"objects":{"outerLine":{"type":"GeometryCollection","geometries":[{"type":"LineString","arcs":[0,1]},{"type":"LineString","arcs":[2,1]}]}},"arcs":[[[0,269],[41,82]],[[41,351],[115,70],[68,10],[35,3],[26,1],[11,-4]],[[295,429],[99,-39],[59,-48],[8,-82],[-34,-91],[-39,-84],[-63,-74],[-54,-11],[-54,12],[-41,8],[-103,82],[-56,66],[-10,114],[34,69]]]}';
var parsedObjecttree = JSON.parse(Objecttree);
For sure this is a json from myself. Replace the json with your data.

Auto updating Tree issue

I have the following D3 js similar to
http://mbostock.github.io/d3/talk/20111018/tree.html
I want to have the tree structure auto update based on new json sent by the server.
The new json is sent every 5 seconds.
The issue is that I am not sure how to get rid of the old tree and just leave the updated tree. Currently it just draws a new tree image using d3 js under the most recent tree so very quickly there are tons of tree structures on the page. I would like to know how to remove the old tree image.
Any d3 or JavaScript input?
<style>
.node {
cursor: pointer;
}
.node circle {
fill: #fff;
stroke: steelblue;
stroke-width: 1.5px;
}
.node text {
font: 10px sans-serif;
}
.link {
fill: none;
stroke: #ccc;
stroke-width: 1.5px;
}
</style>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script>
var treeData2 = <%- JSON.stringify(treeJSON) %>;
drawTree();
function drawTree () {
treeData2.name = "broadcaster";
console.log("tree data = ", treeData2);
var margin = {top: 20, right: 120, bottom: 20, left: 120},
width = 960 - margin.right - margin.left,
height = 800 - margin.top - margin.bottom;
var i = 0,
duration = 750,
root;
var tree = d3.layout.tree()
.size([height, width]);
var diagonal = d3.svg.diagonal()
.projection(function(d) { return [d.y, d.x]; });
svg = d3.select("body").append("svg")
.style("overflow", "scroll")
.attr("width", width + margin.right + margin.left)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.append("svg:g")
.attr("class","drawarea")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
root = treeData2;
root.x0 = height / 2;
root.y0 = 0;
function collapse(d) {
if (d.children) {
d._children = d.children;
d._children.forEach(collapse);
d.children = null;
}
}
root.children.forEach(collapse);
update(root);
var inter = setInterval(function() {
socket.get('/channel/13/tree', function(updatedJSON) {
console.log("Updated Json = ", updatedJSON);
treeData2 = updatedJSON;
})
drawTree();
}, 5000);
d3.select(self.frameElement).style("height", "800px");
function update(source) {
// Compute the new tree layout.
var nodes = tree.nodes(root).reverse(),
links = tree.links(nodes);
// Normalize for fixed-depth.
nodes.forEach(function(d) { d.y = d.depth * 180; });
// Update the nodes…
var node = svg.selectAll("g.node")
.data(nodes, function(d) { return d.id || (d.id = ++i); });
// Enter any new nodes at the parent's previous position.
var nodeEnter = node.enter().append("g")
.attr("class", "node")
.attr("transform", function(d) { return "translate(" + source.y0 + "," + source.x0 + ")"; })
.on("click", click);
nodeEnter.append("circle")
.attr("r", 1e-6)
.style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; });
nodeEnter.append("text")
.attr("x", function(d) { return d.children || d._children ? -10 : 10; })
.attr("dy", ".35em")
.attr("text-anchor", function(d) { return d.children || d._children ? "end" : "start"; })
.text(function(d) { return d.name; })
.style("fill-opacity", 1e-6);
// Transition nodes to their new position.
var nodeUpdate = node.transition()
.duration(duration)
.attr("transform", function(d) { return "translate(" + d.y + "," + d.x + ")"; });
nodeUpdate.select("circle")
.attr("r", 4.5)
.style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; });
nodeUpdate.select("text")
.style("fill-opacity", 1);
// Transition exiting nodes to the parent's new position.
var nodeExit = node.exit().transition()
.duration(duration)
.attr("transform", function(d) { return "translate(" + source.y + "," + source.x + ")"; })
.remove();
nodeExit.select("circle")
.attr("r", 1e-6);
nodeExit.select("text")
.style("fill-opacity", 1e-6);
// Update the links…
var link = svg.selectAll("path.link")
.data(links, function(d) { return d.target.id; });
// Enter any new links at the parent's previous position.
link.enter().insert("path", "g")
.attr("class", "link")
.attr("d", function(d) {
var o = {x: source.x0, y: source.y0};
return diagonal({source: o, target: o});
});
// Transition links to their new position.
link.transition()
.duration(duration)
.attr("d", diagonal);
// Transition exiting nodes to the parent's new position.
link.exit().transition()
.duration(duration)
.attr("d", function(d) {
var o = {x: source.x, y: source.y};
return diagonal({source: o, target: o});
})
.remove();
// Stash the old positions for transition.
nodes.forEach(function(d) {
d.x0 = d.x;
d.y0 = d.y;
});
d3.select("svg")
.call(d3.behavior.zoom()
.scaleExtent([0.5, 5])
.on("zoom", zoom));
node
.exit()
.remove();
link
.exit()
.remove();
}
// Toggle children on click.
function click(d) {
if (d.children) {
d._children = d.children;
d.children = null;
} else {
d.children = d._children;
d._children = null;
}
update(d);
}
// Allows for zoom and drag properties
function zoom() {
var scale = d3.event.scale,
translation = d3.event.translate,
tbound = -height * scale,
bbound = height * scale,
lbound = (-width + margin.right) * scale,
rbound = (width- margin.left) * scale;
// limit translation to thresholds
translation = [
Math.max(Math.min(translation[0], rbound), lbound),
Math.max(Math.min(translation[1], bbound), tbound)
];
d3.select(".drawarea")
.attr("transform", "translate(" + translation + ")" +
" scale(" + scale + ")");
}
}
</script>

To delete the old SVG, simply select and remove it:
d3.selectAll("svg").remove();