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fix(forcedirected.js): make force directed graph zoomable and pannable #393

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fix(forcedirected.js): make force directed graph zoomable and pannable #393

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e83c0da
fix(forcedirected.js): make force directed graph zoomable and pannable
IndexOutOfRange Mar 8, 2020
d7ba315
fix(forcedirected.js): size of the graph computed from props
IndexOutOfRange Mar 9, 2020
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44 changes: 34 additions & 10 deletions packages/superset-ui-legacy-plugin-chart-force-directed/src/ForceDirected.js
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Original file line number Diff line number Diff line change
Expand Up @@ -37,12 +37,18 @@ const propTypes = {

/* Modified from http://bl.ocks.org/d3noob/5141278 */
function ForceDirected(element, props) {
const { data, width, height, linkLength = 200, charge = -500 } = props;
const { data, linkLength = 200, charge = -500 } = props;
let { width, height } = props;

const minZoom = 0.1;
const maxZoom = 7;
const div = d3.select(element);
const zoom = d3.behavior.zoom().scaleExtent([minZoom, maxZoom]);
div.classed('superset-legacy-chart-force-directed', true);

const links = data;
const nodes = {};

// Compute the distinct nodes from the links.
links.forEach(link => {
link.source =
Expand Down Expand Up @@ -82,6 +88,9 @@ function ForceDirected(element, props) {
nodes[targetName].total += link.value;
});

div.selectAll('*').remove();
const svg = div.append('svg');
const g = svg.append('g');
/* eslint-disable no-use-before-define */
// add the curvy lines
function tick() {
Expand All @@ -107,15 +116,22 @@ function ForceDirected(element, props) {
.on('tick', tick)
.start();

div.selectAll('*').remove();
const svg = div
.append('svg')
.attr('width', width)
.attr('height', height);
function resize() {
const { innerWidth, innerHeight } = window;
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Using window 's innerWidth and innerHeight makes the chart expand beyond its supposed size.

svg.attr('width', innerWidth).attr('height', innerHeight);

force
.size([
force.size()[0] + (innerWidth - width) / zoom.scale(),
force.size()[1] + (innerHeight - height) / zoom.scale(),
])
.resume();
width = innerWidth;
height = innerHeight;
}

// build the arrow.
svg
.append('svg:defs')
g.append('svg:defs')
.selectAll('marker')
.data(['end']) // Different link/path types can be defined here
.enter()
Expand All @@ -132,7 +148,7 @@ function ForceDirected(element, props) {

const edgeScale = d3.scale.linear().range([0.1, 0.5]);
// add the links and the arrows
const path = svg
const path = g
.append('svg:g')
.selectAll('path')
.data(force.links())
Expand All @@ -143,7 +159,7 @@ function ForceDirected(element, props) {
.attr('marker-end', 'url(#end)');

// define the nodes
const node = svg
const node = g
.selectAll('.node')
.data(force.nodes())
.enter()
Expand All @@ -170,6 +186,9 @@ function ForceDirected(element, props) {
.transition()
.style('font-size', 12);
})
.on('mousedown', function() {
d3.event.stopPropagation();
})
.call(force.drag);

// add the nodes
Expand All @@ -187,6 +206,11 @@ function ForceDirected(element, props) {
.attr('x', 6)
.attr('dy', '.35em')
.text(d => d.name);
zoom.on('zoom', function() {
g.attr('transform', `translate(${d3.event.translate})scale(${d3.event.scale})`);
});
svg.call(zoom);
resize();
}

ForceDirected.displayName = 'ForceDirected';
Expand Down