Function _onPanRotate

modules/core/src/controllers/controller.ts:493–505

(event: MjolnirGestureEvent)

  // Default handler for panning to rotate.
  // Called by `_onPan` when panning with function key pressed.
  protected _onPanRotate(event: MjolnirGestureEvent): boolean {
    if (!this.dragRotate) {
      return false;
    }

    const pos = this.getCenter(event);
    const newControllerState = this.controllerState.rotate({pos});
    this.updateViewport(newControllerState, NO_TRANSITION_PROPS, {
      isDragging: true,
      isRotating: true
    });
    return true;
  }

  protected _onPanRotateEnd(event): boolean {
    const {inertia} = this;