fix(filter-ui): hide filtering row on column hide #6520

Author: onlyexeption

projects/igniteui-angular/src/lib/grids/columns/column.component.ts

@@ -252,6 +252,7 @@ export class IgxColumnComponent implements AfterContentInit {
                 this.grid.summaryService.resetSummaryHeight();
                 this.grid.filteringService.refreshExpressions();
                 this.grid.notifyChanges();
+                this.grid.filteringService.hideColumnFilteringRowOnVisibilityChange(this);
             }
         }
     }

projects/igniteui-angular/src/lib/grids/filtering/grid-filtering.service.ts

@@ -116,13 +116,17 @@ export class IgxFilteringService implements OnDestroy {
                     filterCell.updateFilterCellArea();
                 });
             });
+        }
+    }
 
-            this.grid.onColumnVisibilityChanged.pipe(takeUntil(this.destroy$)).subscribe((eventArgs: IColumnVisibilityChangedEventArgs) => {
-                if (this.grid.filteringRow && this.grid.filteringRow.column === eventArgs.column ) {
-                    this.grid.filteringRow.close();
+    /**
+     * Close filtering row if a column is hidden.
+     */
+    public hideColumnFilteringRowOnVisibilityChange(col: IgxColumnComponent) {
+        const filteringRow = col.grid.filteringRow;
 
-                }
-            });
+        if (filteringRow && filteringRow.column) {
+            filteringRow.close();
         }
     }
 

projects/igniteui-angular/src/lib/grids/grid/grid-filtering-ui.spec.ts

@@ -2131,24 +2131,23 @@ describe('IgxGrid - Filtering Row UI actions #grid', () => {
         }));
 
         it('Should close filter row when hide the current column', fakeAsync(() => {
-            pending('This issue is failing because of bug #');
             GridFunctions.clickFilterCellChip(fix, 'ProductName');
 
             // Check that the filterRow is opened
-            const filterUIRow = fix.debugElement.query(By.css(FILTER_UI_ROW));
+            let filterUIRow = fix.debugElement.query(By.css(FILTER_UI_ROW));
             expect(filterUIRow).not.toBeNull();
 
             // Add first chip.
             GridFunctions.typeValueInFilterRowInput('a', fix);
             tick(100);
 
             grid.getColumnByName('ProductName').hidden = true;
-            fix.detectChanges();
             tick(100);
+            fix.detectChanges();
 
             // Check that the filterRow is closed
-            expect(fix.debugElement.query(By.css(FILTER_UI_ROW))).toBeNull();
-            expect(grid.rowList.length).toBe(8);
+            filterUIRow = fix.debugElement.query(By.css(FILTER_UI_ROW));
+            expect(filterUIRow).toBeNull();
         }));
 
         it('Should keep existing column filter after hiding another column.', fakeAsync(() => {