ui/app_list/cocoa/scroll_view_with_no_scrollbars.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef UI_APP_LIST_COCOA_SCROLL_VIEW_WITH_NO_SCROLLBARS_H_
   6 #define UI_APP_LIST_COCOA_SCROLL_VIEW_WITH_NO_SCROLLBARS_H_
   7
   8 #include <Cocoa/Cocoa.h>
   9
  10 // Delegate to notify when a user interaction to scroll completes.
  11 @protocol GestureScrollDelegate
  12
  13 // Called when a scroll gesture is observed, or when it completes.
  14 - (void)userScrolling:(BOOL)isScrolling;
  15
  16 @end
  17
  18 // NSScrollView has a quirk when created programatically that causes gesture
  19 // scrolling to fail if it does not have a scroll bar. This provides a scroll
  20 // view using custom scrollers that are not visible.
  21 @interface ScrollViewWithNoScrollbars : NSScrollView {
  22  @private
  23   id<GestureScrollDelegate> delegate_;
  24 }
  25
  26 @property(assign, nonatomic) id<GestureScrollDelegate> delegate;
  27
  28 @end
  29
  30 #endif  // UI_APP_LIST_COCOA_SCROLL_VIEW_WITH_NO_SCROLLBARS_H_