Telegram/Telegraph/TGCollectionMenuLayout.h

#import <UIKit/UIKit.h>

@interface TGCollectionMenuLayout : UICollectionViewFlowLayout

@property (nonatomic) bool withoutAnimation;

@property (assign, nonatomic) CGFloat scrollingSpeed;
@property (assign, nonatomic) UIEdgeInsets scrollingTriggerEdgeInsets;
@property (strong, nonatomic, readonly) UILongPressGestureRecognizer *longPressGestureRecognizer;
@property (strong, nonatomic, readonly) UIPanGestureRecognizer *panGestureRecognizer;

@property (strong, nonatomic) NSIndexPath *selectedItemIndexPath;

@end

@protocol TGCollectionMenuLayoutDataSource <UICollectionViewDataSource>

@optional

- (void)collectionView:(UICollectionView *)collectionView itemAtIndexPath:(NSIndexPath *)fromIndexPath willMoveToIndexPath:(NSIndexPath *)toIndexPath;
- (void)collectionView:(UICollectionView *)collectionView itemAtIndexPath:(NSIndexPath *)fromIndexPath willBeginMovingToIndexPath:(NSIndexPath *)toIndexPath;
- (void)collectionView:(UICollectionView *)collectionView itemAtIndexPath:(NSIndexPath *)fromIndexPath didMoveToIndexPath:(NSIndexPath *)toIndexPath;

- (BOOL)collectionView:(UICollectionView *)collectionView canMoveItemAtIndexPath:(NSIndexPath *)indexPath;
- (BOOL)collectionView:(UICollectionView *)collectionView itemAtIndexPath:(NSIndexPath *)fromIndexPath canMoveToIndexPath:(NSIndexPath *)toIndexPath;

@end

@protocol TGCollectionMenuLayoutDelegateFlowLayout <UICollectionViewDelegateFlowLayout>
@optional

- (BOOL)collectionViewCanMoveItems:(UICollectionView *)collectionView;
- (void)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout willBeginDraggingItemAtIndexPath:(NSIndexPath *)indexPath;
- (void)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout didBeginDraggingItemAtIndexPath:(NSIndexPath *)indexPath;
- (void)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout willEndDraggingItemAtIndexPath:(NSIndexPath *)indexPath;
- (void)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout didEndDraggingItemAtIndexPath:(NSIndexPath *)indexPath;

@end