We Keep Coding

Horizontally Flipping Text Halfway Around a Circle with D3.js

I am making a Sunburst chart and am almost complete, but I want the text to flip half-way around the circle to make it easier to read. Using help from another question here on stackoverflow I have been able to get the text to flip, but it drops down a level. I have tried modifying the computeTextRotation function to account for this, but to no prevail. I am curious if anyone is able to help me solve this problem.
Here is a picture of the chart:
Here is the computeTextRotation functions code:
function computeTextRotation(d) {
var rotation = (d.x + d.dx / 2) * 180 / Math.PI - 90;
return {
global: rotation,
correction: rotation > 90 ? 180 : 0
};
}
...
.attr("transform", function(d)
{
var r = computeTextRotation(d);
return "rotate(" + r.global + ")"
+ "translate(" + radius / 3. * d.depth + ")"
+ "rotate(" + -r.correction + ")";
}
)
Here is the entire JavaScript code:
var margin = {top: 500, right: 500, bottom: 500, left: 500},
radius = Math.min(margin.top, margin.right, margin.bottom, margin.left) - 150;
function filter_min_arc_size_text(d, i) {return (d.dx*d.depth*radius/1)>14};
var hue = d3.scale.category10();
var luminance = d3.scale.sqrt()
.domain([0, 1e6])
.clamp(true)
.range([90, 20]);
var svg = d3.select("body").append("svg")
.attr("width", margin.left + margin.right)
.attr("height", margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
var partition = d3.layout.partition()
.sort(function(a, b) { return d3.ascending(a.name, b.name); })
.size([2 * Math.PI, radius]);
var arc = d3.svg.arc()
.startAngle(function(d) { return d.x; })
.endAngle(function(d) { return d.x + d.dx - .01 / (d.depth + .5); })
.innerRadius(function(d) { return radius / 3 * d.depth; })
.outerRadius(function(d) { return radius / 3 * (d.depth + 1) - 1; });
//Tooltip description
var tooltip = d3.select("body")
.append("div")
.attr("id", "tooltip")
.style("position", "absolute")
.style("z-index", "10")
.style("opacity", 0);
function format_number(x) {
return x.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ",");
}
function format_description(d) {
var description = d.description;
return '<b>' + d.name + '</b></br>'+ d.description + '<br> (' + format_number(d.value) + ')';
}
function computeTextRotation(d) {
var angle=(d.x +d.dx/2)*180/Math.PI - 90
return angle;
}
function mouseOverArc(d) {
d3.select(this).attr("stroke","black")
tooltip.html(format_description(d));
return tooltip.transition()
.duration(50)
.style("opacity", 0.9);
}
function mouseOutArc(){
d3.select(this).attr("stroke","")
return tooltip.style("opacity", 0);
}
function mouseMoveArc (d) {
return tooltip
.style("top", (d3.event.pageY-10)+"px")
.style("left", (d3.event.pageX+10)+"px");
}
var root_ = null;
d3.json("data/davis-aroma-wheel.json", function(error, root) {
if (error) return console.warn(error);
// Compute the initial layout on the entire tree to sum sizes.
// Also compute the full name and fill color for each node,
// and stash the children so they can be restored as we descend.
partition
.value(function(d) { return d.size; })
.nodes(root)
.forEach(function(d) {
d._children = d.children;
d.sum = d.value;
d.key = key(d);
d.fill = fill(d);
});
// Now redefine the value function to use the previously-computed sum.
partition
.children(function(d, depth) { return depth < 3 ? d._children : null; })
.value(function(d) { return d.sum; });
var center = svg.append("circle")
.attr("r", radius / 3)
.on("click", zoomOut);
center.append("title")
.text("zoom out");
var partitioned_data = partition.nodes(root).slice(1)
var path = svg.selectAll("path")
.data(partitioned_data)
.enter().append("path")
.attr("d", arc)
.style("fill", function(d) { return d.fill; })
.each(function(d) { this._current = updateArc(d); })
.on("click", zoomIn)
.on("mouseover", mouseOverArc)
.on("mousemove", mouseMoveArc)
.on("mouseout", mouseOutArc);
var texts = svg.selectAll("text")
.data(partitioned_data)
.enter().append("text")
.filter(filter_min_arc_size_text)
.attr("transform", function(d) { return "rotate(" + computeTextRotation(d) + ")"; })
.attr("x", function(d) { return radius / 3 * d.depth; })
.attr("dx", "6") // margin
.attr("dy", ".35em") // vertical-align
.text(function(d,i) {return d.name})
function zoomIn(p) {
if (p.depth > 1) p = p.parent;
if (!p.children) return;
zoom(p, p);
}
function zoomOut(p) {
if (!p.parent) return;
zoom(p.parent, p);
}
// Zoom to the specified new root.
function zoom(root, p) {
if (document.documentElement.__transition__) return;
// Rescale outside angles to match the new layout.
var enterArc,
exitArc,
outsideAngle = d3.scale.linear().domain([0, 2 * Math.PI]);
function insideArc(d) {
return p.key > d.key
? {depth: d.depth - 1, x: 0, dx: 0} : p.key < d.key
? {depth: d.depth - 1, x: 2 * Math.PI, dx: 0}
: {depth: 0, x: 0, dx: 2 * Math.PI};
}
function outsideArc(d) {
return {depth: d.depth + 1, x: outsideAngle(d.x), dx: outsideAngle(d.x + d.dx) - outsideAngle(d.x)};
}
center.datum(root);
// When zooming in, arcs enter from the outside and exit to the inside.
// Entering outside arcs start from the old layout.
if (root === p) enterArc = outsideArc, exitArc = insideArc, outsideAngle.range([p.x, p.x + p.dx]);
var new_data=partition.nodes(root).slice(1)
path = path.data(new_data, function(d) { return d.key; });
// When zooming out, arcs enter from the inside and exit to the outside.
// Exiting outside arcs transition to the new layout.
if (root !== p) enterArc = insideArc, exitArc = outsideArc, outsideAngle.range([p.x, p.x + p.dx]);
d3.transition().duration(d3.event.altKey ? 7500 : 750).each(function() {
path.exit().transition()
.style("fill-opacity", function(d) { return d.depth === 1 + (root === p) ? 1 : 0; })
.attrTween("d", function(d) { return arcTween.call(this, exitArc(d)); })
.remove();
path.enter().append("path")
.style("fill-opacity", function(d) { return d.depth === 2 - (root === p) ? 1 : 0; })
.style("fill", function(d) { return d.fill; })
.on("click", zoomIn)
.on("mouseover", mouseOverArc)
.on("mousemove", mouseMoveArc)
.on("mouseout", mouseOutArc)
.each(function(d) { this._current = enterArc(d); });
path.transition()
.style("fill-opacity", 1)
.attrTween("d", function(d) { return arcTween.call(this, updateArc(d)); });
});
texts = texts.data(new_data, function(d) { return d.key; })
texts.exit()
.remove()
texts.enter()
.append("text")
texts.style("opacity", 0)
.attr("transform", function(d) { return "rotate(" + computeTextRotation(d) + ")"; })
.attr("x", function(d) { return radius / 3 * d.depth; })
.attr("dx", "6") // margin
.attr("dy", ".35em") // vertical-align
.filter(filter_min_arc_size_text)
.text(function(d,i) {return d.name})
.transition().delay(750).style("opacity", 1)
}
});
function key(d) {
var k = [], p = d;
while (p.depth) k.push(p.name), p = p.parent;
return k.reverse().join(".");
}
function fill(d) {
var p = d;
while (p.depth > 1) p = p.parent;
var c = d3.lab(hue(p.name));
c.l = luminance(d.sum);
return c;
}
function arcTween(b) {
var i = d3.interpolate(this._current, b);
this._current = i(0);
return function(t) {
return arc(i(t));
};
}
function updateArc(d) {
return {depth: d.depth, x: d.x, dx: d.dx};
}
d3.select(self.frameElement).style("height", margin.top + margin.bottom + "px");

Your corrective factor rotates the text 180 degrees, this is only half of what you need:
By rotating 180 degrees, you get text that is right way up, but now that moves in the opposite direction because the direction of the text is also rotated.
For the second half of the circle, you need to specify a text-anchor of "end" so that the text is anchored where it should be. Currently it is anchored where it starts, which is fine for the first half of the circle.
When styling the text you'll need to perform a check to see if the text anchor needs to be set to "end" as opposed to "start":
text.style("text-anchor",function(d) { return isRotated(d) ? "end" : "start" })
With the check looking something like:
function isRotated(d) {
var rotation = (d.x + d.dx / 2) * 180 / Math.PI - 90;
return rotation > 90 ? true : false
}
The margins also need to be adjusted:
.attr("dx", function(d) {return isRotated(d) ? "-6" : "6"}) //margin

D3: Rotating labels in Bi-Level Partition

I'm using D3 and javascript to create a BiLevel Partition following this example. The labels in the left side of the diagram are upside down, and I was trying to rotate them, but I've not been successful yet.
I found numerous cases of people with the same problem, but using Sunburst. Also tried to implement those solutions, but I'm still unable to solve this problem.
<body>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script>
/*var margin = {top: 350, right: 480, bottom: 350, left: 480},
radius = Math.min(margin.top, margin.right, margin.bottom, margin.left) - 10;*/
var width = 1200,
height = 1200,
radius = Math.min(width, height) / 2;
function filter_min_arc_size_text(d, i) {return (d.dx*d.depth*radius/3)>14};
var hue = d3.scale.category10();
var luminance = d3.scale.sqrt()
.domain([0, 1e6])
.clamp(true)
.range([90, 20]);
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height)
.append("g")
.attr("transform", "translate(" + width / 2 + "," + (height / 2 + 10) + ")");
var partition = d3.layout.partition()
.sort(function(a, b) { return d3.ascending(a.name, b.name); })
.size([2 * Math.PI, radius]);
var arc = d3.svg.arc()
.startAngle(function(d) { return d.x; })
.endAngle(function(d) { return d.x + d.dx - .01 / (d.depth + .5); })
.innerRadius(function(d) { return radius / 3 * d.depth; })
.outerRadius(function(d) { return radius / 3 * (d.depth + 1) - 1; });
//Tooltip description
var tooltip = d3.select("body")
.append("div")
.attr("id", "tooltip")
.style("position", "absolute")
.style("z-index", "10")
.style("opacity", 0);
function format_number(x) {
return x.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ",");
}
function format_description(d) {
var description = d.description;
return /* '<b>' + d.name + '</b></br>'+*/ d.description + '<br> (' + format_number(d.value) + ')';
}
function computeTextRotation(d) {
var ang = ((d.x + d.dx / 2) - Math.PI / 2) / Math.PI * 180;
return (ang > 90) ? 180 + ang : ang;
}
function mouseOverArc(d) {
d3.select(this).attr("stroke","black")
tooltip.html(format_description(d));
return tooltip.transition()
.duration(50)
.style("opacity", 0.9);
}
function mouseOutArc(){
d3.select(this).attr("stroke","")
return tooltip.style("opacity", 0);
}
function mouseMoveArc (d) {
return tooltip
.style("top", (d3.event.pageY-10)+"px")
.style("left", (d3.event.pageX+10)+"px");
}
var root_ = null;
d3.json("flare.json", function(error, root) {
if (error) return console.warn(error);
// Compute the initial layout on the entire tree to sum sizes.
// Also compute the full name and fill color for each node,
// and stash the children so they can be restored as we descend.
partition
.value(function(d) { return d.size; })
.nodes(root)
.forEach(function(d) {
d._children = d.children;
d.sum = d.value;
d.key = key(d);
d.fill = fill(d);
});
// Now redefine the value function to use the previously-computed sum.
partition
.children(function(d, depth) { return depth < 2 ? d._children : null; })
.value(function(d) { return d.sum; });
var center = svg.append("circle")
.attr("r", radius / 3)
.on("click", zoomOut);
center.append("title")
.text("zoom out");
var partitioned_data=partition.nodes(root).slice(1)
var path = svg.selectAll("path")
.data(partitioned_data)
.enter().append("path")
.attr("d", arc)
.style("fill", function(d) { return d.fill; })
.each(function(d) { this._current = updateArc(d); })
.on("click", zoomIn)
.on("mouseover", mouseOverArc)
.on("mousemove", mouseMoveArc)
.on("mouseout", mouseOutArc);
var texts = svg.selectAll("text")
.data(partitioned_data)
.enter().append("text")
.filter(filter_min_arc_size_text)
.attr("transform", function(d) { return "rotate(" + computeTextRotation(d) + ")"; })
.attr("x", function(d) { return radius / 3 * d.depth; })
.attr("dx", "6") // margin
.attr("dy", ".35em") // vertical-align
.text(function(d,i) {return d.name})
function zoomIn(p) {
if (p.depth > 1) p = p.parent;
if (!p.children) return;
zoom(p, p);
}
function zoomOut(p) {
if (!p.parent) return;
zoom(p.parent, p);
}
// Zoom to the specified new root.
function zoom(root, p) {
if (document.documentElement.__transition__) return;
// Rescale outside angles to match the new layout.
var enterArc,
exitArc,
outsideAngle = d3.scale.linear().domain([0, 2 * Math.PI]);
function insideArc(d) {
return p.key > d.key
? {depth: d.depth - 1, x: 0, dx: 0} : p.key < d.key
? {depth: d.depth - 1, x: 2 * Math.PI, dx: 0}
: {depth: 0, x: 0, dx: 2 * Math.PI};
}
function outsideArc(d) {
return {depth: d.depth + 1, x: outsideAngle(d.x), dx: outsideAngle(d.x + d.dx) - outsideAngle(d.x)};
}
center.datum(root);
// When zooming in, arcs enter from the outside and exit to the inside.
// Entering outside arcs start from the old layout.
if (root === p) enterArc = outsideArc, exitArc = insideArc, outsideAngle.range([p.x, p.x + p.dx]);
var new_data=partition.nodes(root).slice(1)
path = path.data(new_data, function(d) { return d.key; });
// When zooming out, arcs enter from the inside and exit to the outside.
// Exiting outside arcs transition to the new layout.
if (root !== p) enterArc = insideArc, exitArc = outsideArc, outsideAngle.range([p.x, p.x + p.dx]);
d3.transition().duration(d3.event.altKey ? 7500 : 750).each(function() {
path.exit().transition()
.style("fill-opacity", function(d) { return d.depth === 1 + (root === p) ? 1 : 0; })
.attrTween("d", function(d) { return arcTween.call(this, exitArc(d)); })
.remove();
path.enter().append("path")
.style("fill-opacity", function(d) { return d.depth === 2 - (root === p) ? 1 : 0; })
.style("fill", function(d) { return d.fill; })
.on("click", zoomIn)
.on("mouseover", mouseOverArc)
.on("mousemove", mouseMoveArc)
.on("mouseout", mouseOutArc)
.each(function(d) { this._current = enterArc(d); });
path.transition()
.style("fill-opacity", 1)
.attrTween("d", function(d) { return arcTween.call(this, updateArc(d)); });
});
texts = texts.data(new_data, function(d) { return d.key; })
texts.exit()
.remove()
texts.enter()
.append("text")
texts.style("opacity", 0)
.attr("transform", function(d) { return "rotate(" + computeTextRotation(d) + ")"; })
.attr("x", function(d) { return radius / 3 * d.depth; })
.attr("dx", "6") // margin
.attr("dy", ".35em") // vertical-align
.filter(filter_min_arc_size_text)
.text(function(d,i) {return d.name})
.transition().delay(750).style("opacity", 1)
}
});
function key(d) {
var k = [], p = d;
while (p.depth) k.push(p.name), p = p.parent;
return k.reverse().join(".");
}
function fill(d) {
var p = d;
while (p.depth > 1) p = p.parent;
var c = d3.lab(hue(p.name));
c.l = luminance(d.sum);
return c;
}
function arcTween(b) {
var i = d3.interpolate(this._current, b);
this._current = i(0);
return function(t) {
return arc(i(t));
};
}
function updateArc(d) {
return {depth: d.depth, x: d.x, dx: d.dx};
}
d3.select(self.frameElement).style("height", margin.top + margin.bottom + "px");
</script>
The problem I have is that it is only showing the right half of the Partition.

d3 Sunburst reduce parent node inner and outer radius on click

I am trying to reduce the size of the parent level inner and outer radius' when I click on one of its children nodes. You can view my current diagram here: https://jsfiddle.net/2heLd2b1/. As you can see, when a child node is clicked and the distorts to display the selected node and its path, the parent layers take up too much space. I am looking for any suggestions as to how I could reduce or shrink the parent nodes width.
ar width = 960,
height = 750,
radius = (Math.min(width, height) / 2) - 10;
var color = d3.scale.category20c();
var x = d3.scale.linear()
.range([0, 2 * Math.PI]);
var y = d3.scale.linear()
.range([0, radius]);
function percent(d) {
var percentage = (d.value / 956129) * 100;
return percentage.toFixed(2);
}
// var tip = d3.tip()
// .attr('class', 'd3-tip')
// .offset([-10, 0])
// .html(function(d) {
// return "<strong>" + d.name + "</strong> <span style='color:red'>" + percent(d) + "%</span>";
// })
var partition = d3.layout.partition()
// .value(function(d) { return d.size; });
.value(function(d) { return 1; });
var arc = d3.svg.arc()
.startAngle(function(d) { return Math.max(0, Math.min(2 * Math.PI, x(d.x))); })
.endAngle(function(d) { return Math.max(0, Math.min(2 * Math.PI, x(d.x + d.dx))); })
.innerRadius(function(d) { return Math.max(0, y(d.y)) })
.outerRadius(function(d) { return Math.max(0, y(d.y + d.dy)) })
.cornerRadius(function(d) { return 5;});
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height)
.append("g")
.attr("transform", "translate(" + width / 2 + "," + height / 2 + ")")
.append("g")
.classed("inner", true);
// svg.call(tip);
d3.json("flare.json", function(error, root) {
if (error) throw error;
var g = svg.selectAll("g")
.data(partition.nodes(root))
.enter().append("g");
path = g.append("path")
.attr("d", arc)
.attr('stroke', 'white')
.attr("fill", function(d) { return color((d.children ? d : d.parent).name); })
.on("click", magnify)
// .on('mouseover', tip.show)
// .on('mouseout', tip.hide)
.each(stash);
var text = g.append("text")
.attr("x", function(d) { return d.x; })
.attr("dx", "6") // margin
.attr("dy", ".35em") // vertical-align
.text(function(d) {
return d.name;
})
.attr('font-size', function(d) {
return '10px';
})
.attr("text-anchor", "middle")
.attr("transform", function(d) {
if (d.depth > 0) {
return "translate(" + arc.centroid(d) + ")" +
"rotate(" + getStartAngle(d) + ")";
} else {
return null;
}
})
.on("click", magnify);
var innerG = d3.selectAll("g.inner");
// Distort the specified node to 80% of its parent.
function magnify(node) {
// get and store parent sequence
var parentSequence = getAncestors(node)
text.transition().attr("opacity", 0);
spin(node);
// check if node has a parent. If so, iterate throught parentSequence and update the size of each node in the sequence
if (node.parent) {
for (var p = 0; p < parentSequence.length; p++) {
if (parent = parentSequence[p].parent) {
var parent,
x = parent.x,
k = 0.95;
parent.children.forEach(function(sibling) {
x += reposition(sibling, x, sibling === parentSequence[p]
? parent.dx * k / parentSequence[p].value
: parent.dx * (1 - k) / (parent.value - parentSequence[p].value));
});
} else {
reposition(parentSequence[p], 0, parentSequence[p].dx / parentSequence[p].value);
}
}
// if node does not have parent (center node) reset all values to original
} else {
if (parent = node.parent) {
var parent,
x = parent.x,
k = 0.95;
parent.children.forEach(function(sibling) {
x += reposition(sibling, x, sibling === node
? parent.dx * k / node.value
: parent.dx * (1 - k) / (parent.value - node.value));
});
} else {
reposition(node, 0, node.dx / node.value);
}
}
path.transition()
.duration(750)
.attrTween("d", arcTween)
.each("end", function(e, i) {
// check if the animated element's data e lies within the visible angle span given in node
if (e.x >= node.x && e.x < (node.x + node.dx)) {
// get a selection of the associated text element
var arcText = d3.select(this.parentNode).select("text");
// fade in the text element and recalculate positions
arcText.transition().duration(750)
.attr("opacity", 1)
.attr("x", function(d) {
return d.x;
})
.attr("transform", function(d) {
if (d.depth > 0) {
return "translate(" + arc.centroid(d) + ")" +
"rotate(" + getNewAngle(d) + ")";
} else {
return null;
}
});
}
});
}
function spin(d) {
var spin1 = new Promise (function(resolve, reject) {
var newAngle = - x(d.x + d.dx / 2);
// console.log('newAngle', newAngle)
innerG
.transition()
.duration(1500)
.attr("transform", "rotate(" + ((180 / Math.PI * newAngle)) + ")");
resolve("Success!");
});
spin1.then(function() {
var newerAngle = - x(d.x + d.dx / 2);
// console.log('newerAngle', newerAngle)
innerG
.transition()
.duration(1500)
.attr("transform", "rotate(" + ((180 / Math.PI * newerAngle)) + ")");
})
path
.classed("selected", function (x) { return d.name == x.name; });
}
// Recursively reposition the node at position x with scale k.
function reposition(node, x, k) {
// console.log(k)
node.x = x;
if (node.children && (n = node.children.length)) {
var i = -1, n;
while (++i < n) x += reposition(node.children[i], x, k);
}
return node.dx = node.value * k;
}
// Stash the old values for transition.
function stash(d) {
d.x0 = d.x;
d.dx0 = d.dx;
}
// Interpolate the arcs in data space.
function arcTween(a) {
var i = d3.interpolate({x: a.x0, dx: a.dx0}, a);
return function(t) {
var b = i(t);
a.x0 = b.x;
a.dx0 = b.dx;
return arc(b);
};
};
});
function getStartAngle(d) {
// Offset the angle by 90 deg since the '0' degree axis for arc is Y axis, while
// for text it is the X axis.
var thetaDeg = (180 / Math.PI * (arc.startAngle()(d) + arc.endAngle()(d)) / 2 - 90);
// If we are rotating the text by more than 90 deg, then "flip" it.
// This is why "text-anchor", "middle" is important, otherwise, this "flip" would
// a little harder.
return (thetaDeg > 90) ? thetaDeg - 180 : thetaDeg;
}
function getNewAngle(d) {
var thetaDeg = (180 / Math.PI * (arc.startAngle()(d) + arc.endAngle()(d)) / 2 - 90);
return (thetaDeg < 90) ? thetaDeg - 180 : thetaDeg;
}
function getAncestors(node) {
var path = [];
var current = node;
while (current.parent) {
path.unshift(current);
current = current.parent;
}
return path;
}

I managed to figure it out by combining the tween methods from my original jsFiddle link, https://jsfiddle.net/2heLd2b1/, with the traditional tween used by a zoomable sunburst.You can see the implementation here: https://jsfiddle.net/6e4y0s11/
I altered my innerRadius and outerRadius from:
var arc = d3.svg.arc()
.startAngle(function(d) { return Math.max(0, Math.min(2 * Math.PI, x(d.x))); })
.endAngle(function(d) { return Math.max(0, Math.min(2 * Math.PI, x(d.x + d.dx))); })
.innerRadius(function(d) { return Math.max(0, y(d.y)) })
.outerRadius(function(d) { return Math.max(0, y(d.y + d.dy)) })
.cornerRadius(function(d) { return 5;});
to:
var arc = d3.svg.arc()
.startAngle(function(d) { return Math.max(0, Math.min(2 * Math.PI, x(d.x))); })
.endAngle(function(d) { return Math.max(0, Math.min(2 * Math.PI, x(d.x + d.dx))); })
.innerRadius(function(d) { return Math.max(d.depth * 20, y(d.y)) })
.outerRadius(function(d) { return Math.max(100, y(d.y + d.dy)) })
.cornerRadius(function(d) { return 5;});
I also added:
function arcTweenZoom(d) {
var yd = d3.interpolate(y.domain(), [d.y, 1]),
yr = d3.interpolate(y.range(), [d.y ? 20 : 0, radius]);
return function(d, i) {
return i
? function(t) { return arc(d); }
: function(t) {
y.domain(yd(t)).range(yr(t));
return arc(d);
};
};
}
so that I could interpolate the scales. The final result allows the inner parent level nodes to shrink without actually disappearing. The maintain a minimum radius based on their d.y values.

Issue labeling d3 sunburst

I am developing a d3 sunburst type.
Everything is ok, It is taking the flare JSON correctly but, when I go to label the path look what is happening:
The code is the following:
var width = 960,
height = 700,
radius = Math.min(width, height) / 2;
var x = d3.scale.linear()
.range([0, 2 * Math.PI]);
var y = d3.scale.linear()
.range([0, radius]);
var hue = d3.scale.ordinal().range(["#feec76","#aec7e8","#ff00bf","#7f7f7f"]);
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height)
.append("g")
.attr("transform", "translate(" + width / 2 + "," + (height / 2 + 10) + ")");
var partition = d3.layout.partition()
.value(function(d) { return d.size; });
var arc = d3.svg.arc()
.startAngle(function(d) { return Math.max(0, Math.min(2 * Math.PI, x(d.x))); })
.endAngle(function(d) { return Math.max(0, Math.min(2 * Math.PI, x(d.x + d.dx))); })
.innerRadius(function(d) { return Math.max(0, y(d.y)); })
.outerRadius(function(d) { return Math.max(0, y(d.y + d.dy)); });
d3.json("http://api.printoriente.com/treemap.php", function(error, root) {
var g = svg.selectAll("g")
.data(partition.nodes(root))
.enter().append("g");
var path = g.append("path")
.attr("d", arc)
.style("fill", function(d) { return hue((d.children ? d : d.parent).name); })
.on("click", click);
var text = g.append("text")
.attr("transform", function(d) { return "rotate(" + computeTextRotation(d) + ")"; })
.attr("x", function(d) { return y(d.y); })
.attr("dx", "6") // margin
.attr("dy", ".35em") // vertical-align
.text(function(d) { return d.name; });
And the rotation code is:
function computeTextRotation(d) {
return (x(d.x + d.dx / 2) - Math.PI / 2) / Math.PI * 180;
}
This script works for all others d3 but I have to put those colors for each path.
Where is the problem?
Regards.
UPDATED: d3 sunburst with small font-size:
UPDATED: I want something like this:
UPDATED: Take a look of internal labels:

I'm not sure where you got the code to calculate the angle from, but it seems to be completely off. If you look at this example, the code to compute the angle is (with everything else being equal)
var angle = (d.x + d.dx / 2) * 180 / Math.PI - 90;
Replacing the code in your example with that fixes the angles. To fix the positions, you can adjust the dx offset of the labels, e.g.
.attr("dx", 50")
Complete example here.

D3 "Sunburst" Center Path Size

So I've got a pretty standard D3 "Sunburst" diagram. However, the center path (i.e. the root), is too big. It's taking up a large portion of my diagram that is being wasted as the more important arcs around it struggle for space.
I'm about to add labels to the outer rings but I need more space.
See below.
I want to make the center circle (the light grey bit) smaller and the outer rings thicker.
Can any one help me?
Here's my code:
var width = 850,
height = 700,
padding = 6,
duration = 750,
labelLimit = 120,
radius = Math.min(width, height) / 2 - 10;
var x = d3.scale.linear()
.range([0, 2 * Math.PI]);
var y = d3.scale.sqrt()
.range([0, radius]);
var svg = d3.select("#wheel")
.append("svg")
.attr("width", width)
.attr("height", height)
.append("g")
.attr("id", "scan")
.attr("transform", "translate(" + width / 2 + "," + (height / 2) + ")");
var partition = d3.layout.partition()
.value(function(d) { return d.size; });
var arc = d3.svg.arc()
.startAngle(function(d) { return Math.max(0, Math.min(2 * Math.PI, x(d.x))); })
.endAngle(function(d) { return Math.max(0, Math.min(2 * Math.PI, x(d.x + d.dx))); })
.innerRadius(function(d) { return Math.max(0, y(d.y)); })
.outerRadius(function(d) { return Math.max(0, y(d.y + d.dy)); });
var path = svg.selectAll("path")
.data(partition.nodes(bp.data.preparedData))
.enter()
.append("path")
//.attr("display", function(d) { return d.depth ? null : "none"; }) // hide inner ring
.attr("d", arc)
.attr("id", function(d) { return d.ci_type === 'type' || d.ci_type === 'provider' ? d.name : ''; })
.attr("class", 'context')
.attr("data-toggle", 'context')
.attr("data-target", '#context-menu')
.attr("data-name", function(d) { return d.name; })
.attr("data-type", function(d) { return d.type; })
.attr("data-provider", function(d) { return d.provider; })
.attr("data-ci_type", function(d) { return d.ci_type; })
.style("fill", function(d) { return bp.draw.getColor(d); });
var text = svg.selectAll("text")
.data(partition.nodes(bp.data.preparedData));
var textEnter = text.enter()
.append("text")
.style("fill-opacity", 1)
.style("font-weight", 200)
//.style("letter-spacing",1)
.style("fill", function(d) { return bp.draw.getLabelColor(d); })
.attr("font-size", function(d) { return d.ci_type === 'type' ? 12 : 16})
.attr("text-anchor", function(d) {
return x(d.x + d.dx / 2) > Math.PI ? "end" : "start";
})
.attr("dy", ".2em")
.attr("transform", function(d) {
var multiline = (d.name || "").split(" ").length > 1,
angle = x(d.x + d.dx / 2) * 180 / Math.PI - 90,
rotate = angle + (multiline ? -.5 : 0);
return "rotate(" + rotate + ")translate(" + (y(d.y) + padding) + ")rotate(" + (angle > 90 ? -180 : 0) + ")";
})
.attr("class", 'cursor')
.attr("data-toggle", 'context')
.attr("data-target", '#context-menu')
.attr("data-name", function(d) { return d.name; })
.attr("data-type", function(d) { return d.type; })
.attr("data-provider", function(d) { return d.provider; })
.attr("data-ci_type", function(d) { return d.ci_type; })
textEnter.append("tspan")
.attr("x", 0)
.text(function(d) { return d.depth ? d.name : ""; });

The non-linear response in ring width is due to the square root in the y scale, in this line:
var y = d3.scale.sqrt()
.range([0, radius]);
If you want a linear reponse just change the scale to linear as in:
var y = d3.scale.linear()
.range([0, radius]);
You should then see evenly spaced rings.