fixed annotation list scroll position resetting when selecting an ann…

…otation
seung-lab · Sep 25, 2023 · 974cd1a · 974cd1a
1 parent 33eb6f3
commit 974cd1a
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/src/neuroglancer/ui/annotations.ts b/src/neuroglancer/ui/annotations.ts
@@ -562,8 +562,12 @@ export class AnnotationLayerView extends Tab {
     }
     const oldLength = this.virtualListSource.length;
     this.updateListLength();
+    // TODO, what problems does this change cause?
+    const insertCount = Math.max(0, listElements.length - oldLength);
+    const deleteCount = Math.max(0, oldLength - listElements.length);
+    const retainCount = Math.min(listElements.length, oldLength);
     this.virtualListSource.changed!.dispatch(
-        [{retainCount: 0, deleteCount: oldLength, insertCount: listElements.length}]);
+        [{retainCount, deleteCount, insertCount}]);
     this.mutableControls.style.display = isMutable ? 'contents' : 'none';
     this.resetOnUpdate();
   }