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allow overriding the "emit change" mechanism in ViewModel

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so view models that should send updates through their collection
can still use the same "emitChange" method on ViewModel
This commit is contained in:
Bruno Windels 2020-08-12 17:39:11 +02:00
parent fbf72b8825
commit 7f50e3d137
1 changed files with 7 additions and 3 deletions
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8
src/domain/ViewModel.js
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@ -22,10 +22,10 @@ import {EventEmitter} from "../utils/EventEmitter.js";
import {Disposables} from "../utils/Disposables.js"; import {Disposables} from "../utils/Disposables.js";
export class ViewModel extends EventEmitter { export class ViewModel extends EventEmitter {
constructor({clock} = {}) { constructor({clock, emitChange} = {}) {
super(); super();
this.disposables = null; this.disposables = null;
this._options = {clock}; this._options = {clock, emitChange};
} }
childOptions(explicitOptions) { childOptions(explicitOptions) {
@ -71,8 +71,12 @@ export class ViewModel extends EventEmitter {
} }
emitChange(changedProps) { emitChange(changedProps) {
if (this._options.emitChange) {
this._options.emitChange(changedProps);
} else {
this.emit("change", changedProps); this.emit("change", changedProps);
} }
}
get clock() { get clock() {
return this._options.clock; return this._options.clock;