Autodidact and coding.
d3_js = require('d3@3')
set_style_tree_diag = (_class_name = _class_name_default_css, _your_style = '') => {
const _default_style = html `
<style>
.${_class_name} {
cursor: pointer;
}
.${_class_name} circle {
fill: #fff;
stroke: steelblue;
stroke-width: 3px;
}
.${_class_name} text {
font: 12px sans-serif;
}
.${_class_name}_link {
fill: none;
stroke: #ccc;
stroke-width: 2px;
}
</style>
`
const style_html = _your_style !== '' ? _your_style : _default_style
return style_html
}
make_tree_diag = (_my_data, _class_name = _class_name_default_css, margin = _margin_default, width = _width_default, height = _height_default, d3 = d3_js) => {
const class_name_link = `${_class_name}_link`
const chart = () => {
// ************** Generate the tree diagram *****************
//set_style()
var i = 0,
duration = 750,
root;
var tree = d3.layout.tree()
.size([height, width]);
var diagonal = d3.svg.diagonal()
.projection(function (d) { return [d.y, d.x]; });
var container = html`<svg></svg>`;
var svg = d3.select(container)
//const svg = d3.select(DOM.svg(width, height))
//var svg = d3.select(DOM.element('svg'))
//var svg = d3.select("body").append("svg")
.attr("width", width + margin.right + margin.left)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
root = _my_data[0];
root.x0 = height / 2;
root.y0 = 0;
update(root);
//d3.select(self.frameElement).style("height", "500px");
function update(source) {
// Compute the new tree layout.
var nodes = tree.nodes(root).reverse(),
links = tree.links(nodes);
// Normalize for fixed-depth.
nodes.forEach(function (d) { d.y = d.depth * 180; });
// Update the nodes…
//var node = svg.selectAll("g.node")
var node = svg.selectAll(`g.${_class_name}`)
.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", _class_name)
.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 ? -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);
// 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")
var link = svg.selectAll(`path.${class_name_link}`)
.data(links, function (d) { return d.target.id; });
// Enter any new links at the parent's previous position.
link.enter().insert("path", "g")
.attr("class",`${class_name_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();
console.log(`****** ${class_name_link}:`, link)
// 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);
}
//return svg.node();
return container;
}
return chart()
}
set_style_tree_diag()
make_tree_diag(_data)
make_tree_diag(_data2, _test_class_name)
Purpose-built for displays of data
Observable is your go-to platform for exploring data and creating expressive data visualizations. Use reactive JavaScript notebooks for prototyping and a collaborative canvas for visual data exploration and dashboard creation.
