text: //
  //  MBOverlayContainerViewController.h
  //  PhotoMathFramework
  //
  //  Created by Marko Mihovilić on 30/03/16.
  //  Copyright © 2016 Microblink Ltd. All rights reserved.
  //
  
  #import "MBRecognizerRunnerViewController.h"
  
  @class MBOverlayViewController;
  
  /**
   Overlay View Controller also needs to notify CameraViewController on certain events.
   Those are events specified by MBOverlayViewControllerDelegate protocol.
   */
  @protocol MBOverlayContainerViewController <MBRecognizerRunnerViewController>
  
  @required
  
  /**
   Notification sent when Overlay View Controller wants to close camera, for example,
   by pressing Cancel button.
   */
  - (void)overlayViewControllerWillCloseCamera:(MBOverlayViewController *)overlayViewController;
  
  /**
   Overlay View Controller should ask it's delegete if it's necessary to display Torch (Light) button.
   Torch button is not necessary if the device doesn't support torch mode (e.g. iPad devices).
   */
  - (BOOL)overlayViewControllerShouldDisplayTorch:(MBOverlayViewController *)overlayViewController;
  
  /**
   Overlay View Controller must notify it's delegete to set the torch mode to On or Off
  
   Returns YES if torch mode was set successfully, otherwise NO.
   */
  - (BOOL)overlayViewController:(MBOverlayViewController *)overlayViewController willSetTorch:(BOOL)isTorchOn;
  
  /**
   * If help mechanism is implemented using MBScanDelegate's scanningViewControllerWillPresentHelp method,
   * Overlay view controller should ask it's container whether it's appropriate do display help button;
   *
   *  @return YES if help button should be displayed.
   */
  - (BOOL)shouldDisplayHelpButton;
  
  /**
   Check if status bar is hidden or showed
   */
  - (BOOL)isStatusBarPresented;
  
  /**
   Overlay View Controller can ask it's delegete about the status of Torch
   */
  - (BOOL)isTorchOn;
  
  /**
   * Overlay View Controller can ask it's owner whether camera was authorized
   */
  - (BOOL)isCameraAuthorized;
  
  @end
  