add some tree styles, #84715

src/vs/editor/contrib/gotoSymbol/peek/referencesWidget.ts

@@ -302,7 +302,10 @@ export class ReferenceWidget extends peekView.PeekViewWidget {
 			keyboardSupport: this._defaultTreeKeyboardSupport,
 			accessibilityProvider: new AriaProvider(),
 			keyboardNavigationLabelProvider: this._instantiationService.createInstance(StringRepresentationProvider),
-			identityProvider: new IdentityProvider()
+			identityProvider: new IdentityProvider(),
+			// overrideStyles: {
+			// 	listBackground: peekView.peekViewResultsBackground
+			// }
 		};
 		this._tree = this._instantiationService.createInstance<typeof WorkbenchAsyncDataTree, WorkbenchAsyncDataTree<ReferencesModel | FileReferences, TreeElement, FuzzyScore>>(
 			WorkbenchAsyncDataTree,
@@ -314,7 +317,7 @@ export class ReferenceWidget extends peekView.PeekViewWidget {
 				this._instantiationService.createInstance(OneReferenceRenderer),
 			],
 			this._instantiationService.createInstance(DataSource),
-			treeOptions
+			treeOptions,
 		);
 
 		// split stuff

src/vs/workbench/browser/parts/editor/breadcrumbsPicker.ts

@@ -379,7 +379,10 @@ export class BreadcrumbsFilePicker extends BreadcrumbsPicker {
 			sorter: new FileSorter(),
 			filter: this._instantiationService.createInstance(FileFilter),
 			identityProvider: new FileIdentityProvider(),
-			keyboardNavigationLabelProvider: new FileNavigationLabelProvider()
+			keyboardNavigationLabelProvider: new FileNavigationLabelProvider(),
+			overrideStyles: {
+				listBackground: breadcrumbsPickerBackground
+			}
 		});
 	}
 

src/vs/workbench/contrib/callHierarchy/browser/callHierarchyPeek.ts

@@ -199,6 +199,9 @@ export class CallHierarchyTreePeekWidget extends peekView.PeekViewWidget {
 			identityProvider: new callHTree.IdentityProvider(() => this._direction),
 			ariaLabel: localize('tree.aria', "Call Hierarchy"),
 			expandOnlyOnTwistieClick: true,
+			// overrideStyles: {
+			// 	listBackground: peekView.peekViewResultsBackground
+			// }
 		};
 		this._tree = this._instantiationService.createInstance<typeof WorkbenchAsyncDataTree, WorkbenchAsyncDataTree<CallHierarchyModel, callHTree.Call, FuzzyScore>>(
 			WorkbenchAsyncDataTree,

src/vs/workbench/contrib/outline/browser/outlinePanel.ts

@@ -47,6 +47,7 @@ import { basename } from 'vs/base/common/resources';
 import { IDataSource } from 'vs/base/browser/ui/tree/tree';
 import { IMarkerDecorationsService } from 'vs/editor/common/services/markersDecorationService';
 import { MarkerSeverity } from 'vs/platform/markers/common/markers';
+import { SIDE_BAR_BACKGROUND } from 'vs/workbench/common/theme';
 
 class RequestState {
 
@@ -331,7 +332,10 @@ export class OutlinePanel extends ViewletPanel {
 				filter: this._treeFilter,
 				identityProvider: new OutlineIdentityProvider(),
 				keyboardNavigationLabelProvider: new OutlineNavigationLabelProvider(),
-				hideTwistiesOfChildlessElements: true
+				hideTwistiesOfChildlessElements: true,
+				overrideStyles: {
+					listBackground: SIDE_BAR_BACKGROUND
+				}
 			}
 		);