1 files changed, 11 insertions, 12 deletions
diff --git a/src/client/views/collections/CollectionStackingViewFieldColumn.tsx b/src/client/views/collections/CollectionStackingViewFieldColumn.tsx
index c455f20d8..6a3cb759e 100644
--- a/src/client/views/collections/CollectionStackingViewFieldColumn.tsx
+++ b/src/client/views/collections/CollectionStackingViewFieldColumn.tsx
@@ -9,7 +9,7 @@ import { ScriptField } from '../../../fields/ScriptField';
 import { BoolCast, NumCast } from '../../../fields/Types';
 import { ImageField } from '../../../fields/URLField';
 import { TraceMobx } from '../../../fields/util';
-import { emptyFunction, returnEmptyString, setupMoveUpEvents } from '../../../Utils';
+import { DivHeight, DivWidth, emptyFunction, returnEmptyString, setupMoveUpEvents } from '../../../Utils';
 import { Docs, DocUtils } from '../../documents/Documents';
 import { DocumentType } from '../../documents/DocumentTypes';
 import { DragManager } from '../../util/DragManager';
@@ -44,8 +44,7 @@ interface CSVFieldColumnProps {
     addDocument: (doc: Doc | Doc[]) => boolean;
     createDropTarget: (ele: HTMLDivElement) => void;
     screenToLocalTransform: () => Transform;
-    observeHeight: (myref: any) => void;
-    unobserveHeight: (myref: any) => void;
+    refList: any[];
 }
 
 @observer
@@ -53,7 +52,7 @@ export class CollectionStackingViewFieldColumn extends ObservableReactComponent<
     private dropDisposer?: DragManager.DragDropDisposer;
     private _disposers: { [name: string]: IReactionDisposer } = {};
     private _headerRef: React.RefObject<HTMLDivElement> = React.createRef();
-    @observable private _background = 'inherit';
+    @observable _background = 'inherit';
     @observable _paletteOn = false;
     @observable _heading = '';
     @observable _color = '';
@@ -71,15 +70,14 @@ export class CollectionStackingViewFieldColumn extends ObservableReactComponent<
     // is that the only way to have drop targets?
     createColumnDropRef = (ele: HTMLDivElement | null) => {
         this.dropDisposer?.();
-        if (ele) {
-            this._ele = ele;
-            this._props.observeHeight(ele);
-            this.dropDisposer = DragManager.MakeDropTarget(ele, this.columnDrop.bind(this), this._props.Document);
-        }
+        if (ele) this.dropDisposer = DragManager.MakeDropTarget(ele, this.columnDrop.bind(this), this._props.Document);
+        else if (this._ele) this.props.refList.splice(this.props.refList.indexOf(this._ele), 1);
+        this._ele = ele;
     };
 
     @action
     componentDidMount() {
+        this._ele && this.props.refList.push(this._ele);
         this._disposers.collapser = reaction(
             () => this._props.headingObject?.collapsed,
             collapsed => (this.collapsed = collapsed !== undefined ? BoolCast(collapsed) : false),
@@ -88,7 +86,8 @@ export class CollectionStackingViewFieldColumn extends ObservableReactComponent<
     }
     componentWillUnmount() {
         this._disposers.collapser?.();
-        this._props.unobserveHeight(this._ele);
+        this._ele && this.props.refList.splice(this.props.refList.indexOf(this._ele), 1);
+        this._ele = null;
     }
 
     //TODO: what is scripting? I found it in SetInPlace def but don't know what that is
@@ -217,8 +216,8 @@ export class CollectionStackingViewFieldColumn extends ObservableReactComponent<
         const layoutItems: ContextMenuProps[] = [];
         const docItems: ContextMenuProps[] = [];
         const dataDoc = this._props.TemplateDataDocument || this._props.Document;
-        const width = this._ele ? Number(getComputedStyle(this._ele).width.replace('px', '')) : 0;
-        const height = this._ele ? Number(getComputedStyle(this._ele).height.replace('px', '')) : 0;
+        const width = this._ele ? DivWidth(this._ele) : 0;
+        const height = this._ele ? DivHeight(this._ele) : 0;
         DocUtils.addDocumentCreatorMenuItems(
             doc => {
                 FormattedTextBox.SetSelectOnLoad(doc);