cached groups user is in for efficiency which avoids th whole screen redrawing when a group is added.

1 files changed, 4 insertions, 1 deletions

diff --git a/src/client/util/SnappingManager.ts b/src/client/util/SnappingManager.ts
index d067dff6c..a615f0247 100644
--- a/src/client/util/SnappingManager.ts
+++ b/src/client/util/SnappingManager.ts
@@ -1,4 +1,5 @@
 import { observable, action, runInAction } from "mobx";
+import { computedFn } from "mobx-utils";
 
 export namespace SnappingManager {
 
@@ -32,6 +33,8 @@ export namespace SnappingManager {
     /// bcz; argh!! TODO;   These do not belong here, but there were include order problems with leaving them in util.ts
     // need to investigate further what caused the mobx update problems and move to a better location.
     export function SetCachedGroups(groups: string[]) { manager.setCachedGroups(groups); }
-    export function GetCachedGroups() { return manager.cachedGroups; }
+    export function GetCachedGroupByName(name: string) {
+        return computedFn(function (name: string) { return manager.cachedGroups.includes(name); }, true)(name);
+    }
 }