From 7f50e3d137de237907cef0418130dde4d7fc62b5 Mon Sep 17 00:00:00 2001
From: Bruno Windels <brunow@matrix.org>
Date: Wed, 12 Aug 2020 17:39:11 +0200
Subject: [PATCH] allow overriding the "emit change" mechanism in ViewModel

so view models that should send updates through their collection
can still use the same "emitChange" method on ViewModel
---
 src/domain/ViewModel.js | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/domain/ViewModel.js b/src/domain/ViewModel.js
index 2f34e536..4f73702a 100644
--- a/src/domain/ViewModel.js
+++ b/src/domain/ViewModel.js
@@ -22,10 +22,10 @@ import {EventEmitter} from "../utils/EventEmitter.js";
 import {Disposables} from "../utils/Disposables.js";
 
 export class ViewModel extends EventEmitter {
-    constructor({clock} = {}) {
+    constructor({clock, emitChange} = {}) {
         super();
         this.disposables = null;
-        this._options = {clock};
+        this._options = {clock, emitChange};
     }
 
     childOptions(explicitOptions) {
@@ -71,7 +71,11 @@ export class ViewModel extends EventEmitter {
     }
 
     emitChange(changedProps) {
-        this.emit("change", changedProps);
+        if (this._options.emitChange) {
+            this._options.emitChange(changedProps);
+        } else {
+            this.emit("change", changedProps);
+        }
     }
 
     get clock() {