ForwardingGestureRecognizer Class Reference

Inheritance diagram for ForwardingGestureRecognizer:

Instance Methods
(instancetype)	- initWithTarget:platformViewsController:
(void)	- touchesBegan:withEvent: [implementation]
(void)	- touchesMoved:withEvent: [implementation]
(void)	- touchesEnded:withEvent: [implementation]
(void)	- touchesCancelled:withEvent: [implementation]
(BOOL)	- gestureRecognizer:shouldRecognizeSimultaneouslyWithGestureRecognizer: [implementation]

Detailed Description

Definition at line 974 of file FlutterPlatformViews.mm.

Method Documentation

gestureRecognizer:shouldRecognizeSimultaneouslyWithGestureRecognizer:

- (BOOL) gestureRecognizer: (UIGestureRecognizer*)  gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer: (UIGestureRecognizer*)  otherGestureRecognizer

implementation

Definition at line 1129 of file FlutterPlatformViews.mm.

                         :(UIGestureRecognizer*)gestureRecognizer
    shouldRecognizeSimultaneouslyWithGestureRecognizer:
        (UIGestureRecognizer*)otherGestureRecognizer {
  return YES;
}

initWithTarget:platformViewsController:

- (instancetype) initWithTarget:		(id)	target
platformViewsController:		(fml::WeakPtr<flutter::FlutterPlatformViewsController>)	platformViewsController

Definition at line 1129 of file FlutterPlatformViews.mm.

                              :(id)target
       platformViewsController:
           (fml::WeakPtr<flutter::FlutterPlatformViewsController>)platformViewsController {
  self = [super initWithTarget:target action:nil];
  if (self) {
    self.delegate = self;
    FML_DCHECK(platformViewsController.get() != nullptr);
    _platformViewsController = std::move(platformViewsController);
    _currentTouchPointersCount = 0;
  }
  return self;
}

touchesBegan:withEvent:

- (void) touchesBegan: (NSSet*)  touches withEvent: (UIEvent*)  event

implementation

Definition at line 1129 of file FlutterPlatformViews.mm.

                    :(NSSet*)touches withEvent:(UIEvent*)event {
  FML_DCHECK(_currentTouchPointersCount >= 0);
  if (_currentTouchPointersCount == 0) {
    // At the start of each gesture sequence, we reset the `_flutterViewController`,
    // so that all the touch events in the same sequence are forwarded to the same
    // `_flutterViewController`.
    _flutterViewController.reset(_platformViewsController->getFlutterViewController());
  }
  [_flutterViewController.get() touchesBegan:touches withEvent:event];
  _currentTouchPointersCount += touches.count;
}

touchesCancelled:withEvent:

- (void) touchesCancelled: (NSSet*)  touches withEvent: (UIEvent*)  event

implementation

Definition at line 1129 of file FlutterPlatformViews.mm.

                        :(NSSet*)touches withEvent:(UIEvent*)event {
  // In the event of platform view is removed, iOS generates a "stationary" change type instead of
  // "cancelled" change type.
  // Flutter needs all the cancelled touches to be "cancelled" change types in order to correctly
  // handle gesture sequence.
  // We always override the change type to "cancelled".
  [_flutterViewController.get() forceTouchesCancelled:touches];
  _currentTouchPointersCount -= touches.count;
  if (_currentTouchPointersCount == 0) {
    self.state = UIGestureRecognizerStateFailed;
    _flutterViewController.reset(nil);
  }
}

touchesEnded:withEvent:

- (void) touchesEnded: (NSSet*)  touches withEvent: (UIEvent*)  event

implementation

Definition at line 1129 of file FlutterPlatformViews.mm.

                    :(NSSet*)touches withEvent:(UIEvent*)event {
  [_flutterViewController.get() touchesEnded:touches withEvent:event];
  _currentTouchPointersCount -= touches.count;
  // Touches in one touch sequence are sent to the touchesEnded method separately if different
  // fingers stop touching the screen at different time. So one touchesEnded method triggering does
  // not necessarially mean the touch sequence has ended. We Only set the state to
  // UIGestureRecognizerStateFailed when all the touches in the current touch sequence is ended.
  if (_currentTouchPointersCount == 0) {
    self.state = UIGestureRecognizerStateFailed;
    _flutterViewController.reset(nil);
  }
}

touchesMoved:withEvent:

- (void) touchesMoved: (NSSet*)  touches withEvent: (UIEvent*)  event

implementation

Definition at line 1129 of file FlutterPlatformViews.mm.

                    :(NSSet*)touches withEvent:(UIEvent*)event {
  [_flutterViewController.get() touchesMoved:touches withEvent:event];
}

---

The documentation for this class was generated from the following file:

• shell/platform/darwin/ios/framework/Source/FlutterPlatformViews.mm