DashboardScenes: Row repeater panels cannot be dragged outside and adding new panels to a cloned row updates all rows (#91062)

* Disallow dragging panels in repeated rows + dropping panels into cloned rows will update all repeated rows

* test

public/app/features/dashboard-scene/scene/RowRepeaterBehavior.test.tsx

@@ -67,6 +67,42 @@ describe('RowRepeaterBehavior', () => {
       expect(gridItem.state.body?.state.key).toBe('canvas-1-clone-B1');
     });
 
+    it('Should update all rows when a panel is added to a clone', async () => {
+      const originalRow = grid.state.children[1] as SceneGridRow;
+      const clone1 = grid.state.children[2] as SceneGridRow;
+      const clone2 = grid.state.children[3] as SceneGridRow;
+
+      expect(originalRow.state.children.length).toBe(1);
+      expect(clone1.state.children.length).toBe(1);
+      expect(clone2.state.children.length).toBe(1);
+
+      clone1.setState({
+        children: [
+          ...clone1.state.children,
+          new SceneGridItem({
+            x: 0,
+            y: 16,
+            width: 24,
+            height: 5,
+            key: 'griditem-4',
+            body: new SceneCanvasText({
+              text: 'new panel',
+            }),
+          }),
+        ],
+      });
+
+      grid.forceRender();
+
+      // repeater has run so there are new clone row objects
+      const newClone1 = grid.state.children[2] as SceneGridRow;
+      const newClone2 = grid.state.children[3] as SceneGridRow;
+
+      expect(originalRow.state.children.length).toBe(2);
+      expect(newClone1.state.children.length).toBe(2);
+      expect(newClone2.state.children.length).toBe(2);
+    });
+
     it('Should push row at the bottom down', () => {
       // Should push row at the bottom down
       const rowAtTheBottom = grid.state.children[6] as SceneGridRow;

public/app/features/dashboard-scene/scene/RowRepeaterBehavior.ts

@@ -46,6 +46,48 @@ export class RowRepeaterBehavior extends SceneObjectBase<RowRepeaterBehaviorStat
 
   private _activationHandler() {
     this.performRepeat();
+
+    const layout = this._getLayout();
+    const originalRow = this._getRow();
+    const filterKey = originalRow.state.key + '-clone-';
+
+    const sub = layout.subscribeToState(() => {
+      const repeatedRows = layout.state.children.filter(
+        (child) => child instanceof SceneGridRow && child.state.key?.includes(filterKey)
+      );
+
+      // go through cloned rows, search for panels that are not clones
+      for (const row of repeatedRows) {
+        if (!(row instanceof SceneGridRow)) {
+          continue;
+        }
+
+        // if no differences in row children compared to original, then no new panel added to clone
+        if (row.state.children.length === originalRow.state.children.length) {
+          continue;
+        }
+
+        //if there are differences, find the new panel, move it to the original and perform re peat
+        const gridItem = row.state.children.find((gridItem) => !gridItem.state.key?.includes('clone'));
+        if (gridItem) {
+          const newGridItem = gridItem.clone();
+          row.setState({ children: row.state.children.filter((item) => item !== gridItem) });
+
+          // if we are moving a panel from the origin row to a clone row, we just return
+          // this means we are modifying the origin row, retriggering the repeat and losing that panel
+          if (originalRow.state.children.find((item) => item.state.key === newGridItem.state.key)) {
+            return;
+          }
+
+          originalRow.setState({ children: [...originalRow.state.children, newGridItem] });
+          this.performRepeat(true);
+        }
+      }
+    });
+
+    return () => {
+      sub.unsubscribe();
+    };
   }
 
   private _getRow(): SceneGridRow {
@@ -66,7 +108,7 @@ export class RowRepeaterBehavior extends SceneObjectBase<RowRepeaterBehaviorStat
     return layout;
   }
 
-  public performRepeat() {
+  public performRepeat(force = false) {
     this.isWaitingForVariables = this._variableDependency.hasDependencyInLoadingState();
 
     if (this.isWaitingForVariables) {
@@ -95,7 +137,7 @@ export class RowRepeaterBehavior extends SceneObjectBase<RowRepeaterBehaviorStat
     const { values, texts } = getMultiVariableValues(variable);
 
     // Do nothing if values are the same
-    if (isEqual(this._prevRepeatValues, values)) {
+    if (isEqual(this._prevRepeatValues, values) && !force) {
       return;
     }
 
@@ -134,7 +176,12 @@ export class RowRepeaterBehavior extends SceneObjectBase<RowRepeaterBehaviorStat
         if (index > 0) {
           ensureUniqueKeys(itemClone, localValue);
 
+          //disallow clones to be dragged around or out of the row
           if (itemClone instanceof DashboardGridItem) {
+            itemClone.setState({
+              isDraggable: false,
+            });
+
             itemClone.state.body.setState({
               menu: new VizPanelMenu({
                 $behaviors: [repeatPanelMenuBehavior],