I am trying to use textBox module of d3plus-text for SVG textbox line-wrapping and automatic font size-scaling. I am following the use instructions from here https://github.com/d3plus/d3plus-text#d3plus-text
I am using the fucntion like so (as reccomended in the github) after updating the root tree:
new d3plus.TextBox()
.data(d3.select("text#rectResize"))
.fontSize(16)
.width(200)
.x(function(d, i) { return i * 250; })
.render();
But I am running into problems with the following error message:
d3plus-text.v0.10.full.min.js:7 Uncaught (in promise) TypeError: this._data.reduce is not a function
at i.a (d3plus-text.v0.10.full.min.js:7)
at test6.html:86
I have searched high and low but still not been able to make this work. Any help on this would be appreciated.
PS: I know I can use MikeBostics Wrap functionality which you can see I have used in the code below with some edits and it works. But I still want to learn how to use d3plus.TextBox as it seems more elegant and provides additional functionality.
Shorter version of my script is below. You can fiddle with it here
<!DOCTYPE html>
<meta charset="UTF-8">
<!-- load the d3.js library -->
<script src="https://d3js.org/d3.v5.min.js"></script>
<script src="https://d3plus.org/js/d3plus-text.v0.10.full.min.js"></script>
<style>
.node circle {
fill: #FFF;
stroke: #009BE4;
stroke-width: 2px;
}
.node text {
font: 12px sans-serif;
}
.link {
fill: none;
stroke: #555;
stroke-width: 2px;
stroke-opacity: 0.3;
}
</style>
<body>
<script>
const circleSize = 8
// Set the dimensions and margins of the diagram
var margin = {top: 20, right: 90, bottom: 30, left: 90},
width = 900 - margin.left - margin.right,
height = 900 - margin.top - margin.bottom;
// declares a tree layout and assigns the size
var treemap = d3.tree().size([height, width]);
// load the external data
var flatData = [
{"name": "This is a very long name for the top level", "parent": null},
{"name": "This is a very long name for Level 2A", "parent": "This is a very long name for the top level" },
{"name": "This is a very long name for Level 2B", "parent": "This is a very long name for the top level" },
{"name": "This is a very long name for Son of A", "parent": "This is a very long name for Level 2A" },
{"name": "This is a very long name for Daughter of A", "parent": "This is a very long name for Level 2A" }
];
// assign null correctly
flatData.forEach(function(d) {
if (d.parent == "null") { d.parent = null};
});
// convert the flat data into a hierarchy
var treeData = d3.stratify()
.id(function(d) { return d.name; })
.parentId(function(d) { return d.parent; })
(flatData);
// assign the name to each node
treeData.each(function(d) {
d.name = d.data.name;
});
// 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 = 500,
root;
// 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);
new d3plus.TextBox()
.data(d3.select("text#rectResize"))
.fontSize(16)
.width(200)
.x(function(d, i) { return i * 250; })
.render();
// wrap text - not elegant way to wrap text
function wrap2(text, width) {
text.each(function() {
var text = d3.select(this),
// words = text.text().split(/\s+/).reverse(), In order to prevent cutting through non-breaking spaces, replaced by below
words = text.text().split(/[ \f\n\r\t\v]+/).reverse(),
word,
line = [],
lineNumber = 0,
lineHeight = 1.2, // ems
y = text.attr("y"),
x = text.attr("x"),
dy = parseFloat(text.attr("dy")),
tspan = text.text(null).append("tspan").attr("x", x).attr("y", y).attr("dy", dy + "em");
while (word = words.pop()) {
line.push(word);
tspan.text(line.join(" "));
if (tspan.node().getComputedTextLength() > width) {
line.pop();
tspan.text(line.join(" "));
line = [word];
tspan = text.append("tspan").attr("x", x).attr("y", y).attr("dy", lineHeight + "em").text(word);
}
}
// find corresponding rect and reszie
d3.select(this.parentNode.children[0]).attr('height', 19 * (lineNumber+1));
});
}
// 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("id", "rectResize")
.attr("dy", "0em")
/* .attr("x", d => d.children ? -15 : 15) */
// .attr("text-anchor", d => d.children ? "end" : "start")
.attr("x", function(d) {
return d.children || d._children ? -15 : 15;
})
.attr("text-anchor", function(d) {
return d.children || d._children ? "end" : "start";
})
.text(function(d) { return d.data.name; })
.style("fill-opacity", 1)
// .call(wrap, 150)
.clone(true).lower()
.attr("stroke", "white");
// 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', circleSize)
.style("fill", function(d) {
return d._children ? "lightsteelblue" : "#fff";
})
.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(o, o)
});
// 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) });
// 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) {
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
}
// 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>
</body>
