| // Copyright 2013 The Flutter Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #import <Cocoa/Cocoa.h> |
| |
| typedef void (^FlutterAsyncKeyCallback)(BOOL handled); |
| |
| /** |
| * An interface for a responder that can process a key event and decides whether |
| * to handle an event asynchronously. |
| * |
| * To use this class, add it to a |FlutterKeyboardManager| with |addPrimaryResponder|. |
| */ |
| @protocol FlutterKeyPrimaryResponder |
| |
| /** |
| * Process the event. |
| * |
| * The |callback| should be called with a value that indicates whether the |
| * responder has handled the given event. The |callback| must be called exactly |
| * once, and can be called before the return of this method, or after. |
| */ |
| @required |
| - (void)handleEvent:(nonnull NSEvent*)event callback:(nonnull FlutterAsyncKeyCallback)callback; |
| |
| @end |
