| 1 | import { isFunction } from "d3-let";
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| 2 |
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| 3 | //
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| 4 | // Emit a custom event Name up the chain of parent models
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| 5 | export default function(eventName, data) {
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| 6 | var name = "$" + eventName;
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| 7 | propagate(this, name, data, this);
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| 8 | return this;
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| 9 | }
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| 10 |
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| 11 | function propagate(model, name, data, originModel) {
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| 12 | if (!model) return;
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| 13 | if (model.hasOwnProperty(name) && isFunction(model[name])) {
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| 14 | if (model[name](data, originModel) === false) return;
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| 15 | }
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| 16 | propagate(model.parent, name, data, originModel);
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| 17 | }
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