API Reference > imodeljs-frontend > Tools > InteractiveTool > onTouchMoveStart onTouchMoveStart Method Called after at least one touch point has moved for an appreciable time and distance along the surface to not be considered a tap. onTouchMoveStart(_ev: BeTouchEvent, _startEv: BeTouchEvent): Promise<EventHandled> Parameter Type Description _ev BeTouchEvent The event that caused this call _startEv BeTouchEvent The event from the last call to onTouchStart Returns - Promise<EventHandled> Yes if event completely handled by tool and event should not be passed on to the IdleTool. Defined in core/frontend/src/tools/Tool.ts Line 582 Last Updated: 13 June, 2024