API Reference > ui-framework > Frontstage > WidgetChangeHandler WidgetChangeHandler Interface Interface defining callbacks for widget changes Implemented by FrontstageComposer Methods Name Description handleResize(zoneId: WidgetZoneId, resizeBy: number, handle: ResizeHandle, filledHeightDiff: number): void handleTabClick(widgetId: WidgetZoneId, tabIndex: number): void handleTabDrag(dragged: PointProps): void handleTabDragEnd(): void handleTabDragStart(widgetId: WidgetZoneId, tabIndex: number, initialPosition: PointProps, widgetBounds: RectangleProps): void handleWidgetStateChange(widgetId: WidgetZoneId, tabIndex: number, isOpening: boolean): void Defined in ui/framework/src/ui-framework/frontstage/FrontstageComposer.tsx Line 31 Last Updated: 11 June, 2024