Merge pull request #6513 from IgniteUI/mdragnev/fix-6467-8.2.x

refactor(*): Expose virtualizationState accessor to igxTreeGrid and igxHierarchicalGrid

Author: kdinev

projects/igniteui-angular/src/lib/grids/grid-base.component.ts

@@ -1556,6 +1556,24 @@ export abstract class IgxGridBaseComponent extends DisplayDensityBase implements
     @Output()
     public onRowDeleted = new EventEmitter<IRowDataEventArgs>();
 
+    /**
+     * Returns the state of the grid virtualization, including the start index and how many records are rendered.
+     * ```typescript
+     * const gridVirtState = this.grid1.virtualizationState;
+     * ```
+	 * @memberof IgxGridBaseComponent
+     */
+    get virtualizationState() {
+        return this.verticalScrollContainer.state;
+    }
+
+    /**
+     * @hidden
+     */
+    set virtualizationState(state) {
+        this.verticalScrollContainer.state = state;
+    }
+
     /**
      * Emitted when a new chunk of data is loaded from virtualization.
      * ```typescript

projects/igniteui-angular/src/lib/grids/grid/grid.component.ts

@@ -172,24 +172,6 @@ export class IgxGridComponent extends IgxGridBaseComponent implements IGridDataB
         this._filteredData = value;
     }
 
-    /**
-     * Returns the state of the grid virtualization, including the start index and how many records are rendered.
-     * ```typescript
-     * const gridVirtState = this.grid1.virtualizationState;
-     * ```
-	 * @memberof IgxGridComponent
-     */
-    get virtualizationState() {
-        return this.verticalScrollContainer.state;
-    }
-
-    /**
-     * @hidden
-     */
-    set virtualizationState(state) {
-        this.verticalScrollContainer.state = state;
-    }
-
     /**
      * Sets the total number of records in the data source.
      * This property is required for remote grid virtualization to function when it is bound to remote data.