Programmatische Manipulation
Steuern Sie den Graphen vollständig mit Ihrem eigenen Code: graph.addNode(...) und graph.addEdge(...) vergrößern ihn, graph.removeNode(id) beschneidet ihn (und nimmt die angehängten Kanten mit) und graph.selectElement(node) wählt einen Knoten genau wie ein Klick aus. Nach einer strukturellen Änderung lässt graph.simulation.reheat() das Kräftelayout neu regeln.
Die Schaltflächen unten rufen ausschließlich diese öffentlichen Methoden auf.
js
// Everything the UI and editing tools do is a public method on the graph. Pass raw
// { id, data } / { from, to } objects — the graph normalizes them for you.
let seq = 0
const added = []
// addNode + addEdge, then reheat so the force layout re-settles with the newcomer.
function addNode(graph) {
const id = `task-${++seq}`
graph.addNode({ id, data: { label: id } })
graph.addEdge({ from: 'core', to: id })
added.push(id)
graph.simulation.reheat()
}
// removeNode also drops every edge connected to it — one call, clean teardown.
function removeNode(graph) {
const id = added.pop()
if (!id) return
graph.removeNode(id)
graph.simulation.reheat(0.3)
}
// selectElement drives the same selection the user gets by clicking. It needs the
// live node instance, so resolve it with getMutableNode first.
function selectCore(graph) {
const core = graph.getMutableNode('core')
if (core) graph.selectElement(core)
}js
const data = {
nodes: [
{ id: 'core', data: { label: 'core' } },
{ id: 'alpha', data: { label: 'alpha' } },
{ id: 'beta', data: { label: 'beta' } },
{ id: 'gamma', data: { label: 'gamma' } }
],
edges: [
{ from: 'core', to: 'alpha' },
{ from: 'core', to: 'beta' },
{ from: 'core', to: 'gamma' }
]
}