ios/chrome/browser/ui/side_swipe_gesture_recognizer.h

   1 // Copyright 2012 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 IOS_CHROME_BROWSER_UI_SIDE_SWIPE_GESTURE_RECOGNIZER_H_
   6 #define IOS_CHROME_BROWSER_UI_SIDE_SWIPE_GESTURE_RECOGNIZER_H_
   7
   8 #import <UIKit/UIGestureRecognizerSubclass.h>
   9 #import <UIKit/UIKit.h>
  10
  11 // This gesture recognizer is used because the default swipe gesture recognizer
  12 // is too restrictive.  The default swipe requires a particular velocity and
  13 // distance that Chrome does not require.
  14 // Another benefit of using a custom gesture recognizer is it can fail faster,
  15 // so recognizers that depend on this recognizer can begin faster.
  16 @interface SideSwipeGestureRecognizer : UIPanGestureRecognizer
  17
  18 // The distance from the edge of the screen in which a side swipe can start.
  19 @property(nonatomic, assign) CGFloat swipeEdge;
  20 // The distance from the edge of the screen from which a gesture starts.
  21 @property(readonly, nonatomic) CGFloat swipeOffset;
  22 // Starting point of swipe.
  23 @property(readonly, nonatomic) CGPoint startPoint;
  24 @property(nonatomic, assign) UISwipeGestureRecognizerDirection direction;
  25
  26 @end
  27
  28 #endif  // IOS_CHROME_BROWSER_UI_SIDE_SWIPE_GESTURE_RECOGNIZER_H_