mirror of
https://github.com/Swiftgram/Telegram-iOS.git
synced 2025-09-08 05:30:47 +00:00
08e31e1c37
Eases support for nesting horizontally scrolling elements within a vertical scroller. Further changes will improve the API, and optimize handling of the nested working ranges.
101 lines
3.0 KiB
Plaintext
101 lines
3.0 KiB
Plaintext
/* This file provided by Facebook is for non-commercial testing and evaluation
|
|
* purposes only. Facebook reserves all rights not expressly granted.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* FACEBOOK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
|
|
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
|
|
#import "HorizontalScrollCellNode.h"
|
|
#import "RandomCoreGraphicsNode.h"
|
|
#import "AppDelegate.h"
|
|
|
|
#import <AsyncDisplayKit/ASDisplayNode+Subclasses.h>
|
|
|
|
#import <AsyncDisplayKit/ASStackLayoutSpec.h>
|
|
#import <AsyncDisplayKit/ASInsetLayoutSpec.h>
|
|
|
|
static const CGFloat kOuterPadding = 16.0f;
|
|
static const CGFloat kInnerPadding = 10.0f;
|
|
|
|
@interface HorizontalScrollCellNode ()
|
|
{
|
|
ASCollectionNode *_collectionNode;
|
|
CGSize _elementSize;
|
|
ASDisplayNode *_divider;
|
|
}
|
|
|
|
@end
|
|
|
|
|
|
@implementation HorizontalScrollCellNode
|
|
|
|
- (instancetype)initWithElementSize:(CGSize)size
|
|
{
|
|
if (!(self = [super init]))
|
|
return nil;
|
|
|
|
_elementSize = size;
|
|
|
|
UICollectionViewFlowLayout *flowLayout = [[UICollectionViewFlowLayout alloc] init];
|
|
flowLayout.scrollDirection = UICollectionViewScrollDirectionHorizontal;
|
|
flowLayout.itemSize = _elementSize;
|
|
flowLayout.minimumInteritemSpacing = kInnerPadding;
|
|
_collectionNode = [[ASCollectionNode alloc] initWithCollectionViewLayout:flowLayout];
|
|
[self addSubnode:_collectionNode];
|
|
|
|
// hairline cell separator
|
|
_divider = [[ASDisplayNode alloc] init];
|
|
_divider.backgroundColor = [UIColor lightGrayColor];
|
|
[self addSubnode:_divider];
|
|
|
|
return self;
|
|
}
|
|
|
|
- (void)didLoad
|
|
{
|
|
[super didLoad];
|
|
_collectionNode.view.asyncDelegate = self;
|
|
_collectionNode.view.asyncDataSource = self;
|
|
}
|
|
|
|
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
|
|
{
|
|
return 5;
|
|
}
|
|
|
|
- (ASCellNode *)collectionView:(ASCollectionView *)collectionView nodeForItemAtIndexPath:(NSIndexPath *)indexPath
|
|
{
|
|
RandomCoreGraphicsNode *elementNode = [[RandomCoreGraphicsNode alloc] init];
|
|
elementNode.preferredFrameSize = _elementSize;
|
|
return elementNode;
|
|
}
|
|
|
|
- (ASLayoutSpec *)layoutSpecThatFits:(ASSizeRange)constrainedSize
|
|
{
|
|
_collectionNode.preferredFrameSize = CGSizeMake(self.bounds.size.width, _elementSize.height);
|
|
|
|
ASInsetLayoutSpec *insetSpec = [[ASInsetLayoutSpec alloc] init];
|
|
insetSpec.insets = UIEdgeInsetsMake(kOuterPadding, 0.0, kOuterPadding, 0.0);
|
|
insetSpec.child = _collectionNode;
|
|
|
|
return insetSpec;
|
|
}
|
|
|
|
// With box model, you don't need to override this method, unless you want to add custom logic.
|
|
- (void)layout
|
|
{
|
|
[super layout];
|
|
|
|
_collectionNode.view.contentInset = UIEdgeInsetsMake(0.0, kOuterPadding, 0.0, kOuterPadding);
|
|
|
|
// Manually layout the divider.
|
|
CGFloat pixelHeight = 1.0f / [[UIScreen mainScreen] scale];
|
|
_divider.frame = CGRectMake(0.0f, 0.0f, self.calculatedSize.width, pixelHeight);
|
|
}
|
|
|
|
@end
|