61 lines
2.2 KiB
Mathematica
61 lines
2.2 KiB
Mathematica
|
/*
|
||
|
|
* Copyright [2023] [Doric.Pub]
|
||
|
|
*
|
||
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
* you may not use this file except in compliance with the License.
|
||
|
|
* You may obtain a copy of the License at
|
||
|
|
*
|
||
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
*
|
||
|
|
* Unless required by applicable law or agreed to in writing, software
|
||
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
* See the License for the specific language governing permissions and
|
||
|
|
* limitations under the License.
|
||
|
|
*/
|
||
|
|
//
|
||
|
|
// DoricSliderNode.m
|
||
|
|
// Doric
|
||
|
|
//
|
||
|
|
// Created by jingpeng.wang on 2023/6/13.
|
||
|
|
//
|
||
|
|
#import "DoricSliderLayout.h"
|
||
|
|
|
||
|
|
@implementation DoricSliderLayout
|
||
|
|
|
||
|
|
- (NSArray<UICollectionViewLayoutAttributes *> *)layoutAttributesForElementsInRect:(CGRect)rect {
|
||
|
|
NSArray *attributes = [super layoutAttributesForElementsInRect:rect];
|
||
|
|
CGRect visitRect = {self.collectionView.contentOffset,self.collectionView.bounds.size};
|
||
|
|
NSMutableArray *attributesCopy = [NSMutableArray array];
|
||
|
|
for (UICollectionViewLayoutAttributes *attribute in attributes) {
|
||
|
|
UICollectionViewLayoutAttributes *attributeCopy = [attribute copy];
|
||
|
|
[attributesCopy addObject:attributeCopy];
|
||
|
|
}
|
||
|
|
|
||
|
|
for (UICollectionViewLayoutAttributes *attribute in attributesCopy) {
|
||
|
|
CGFloat distance = CGRectGetMidX(visitRect) - attribute.center.x;
|
||
|
|
float diff = fabs(distance);
|
||
|
|
CATransform3D scaleTransform = CATransform3DIdentity;
|
||
|
|
|
||
|
|
if (diff >= 0 && diff <= self.galleryItemWidth) {
|
||
|
|
float scale = 1 - (1 - self.galleryMinScale) * (diff / self.galleryItemWidth);
|
||
|
|
scaleTransform = CATransform3DMakeScale(scale, scale, scale);
|
||
|
|
attribute.alpha = 1 - (1 - self.galleryMinAlpha) * (diff / self.galleryItemWidth);
|
||
|
|
} else {
|
||
|
|
float scale = self.galleryMinScale;
|
||
|
|
scaleTransform = CATransform3DMakeScale(scale, scale, scale);
|
||
|
|
attribute.alpha = self.galleryMinAlpha;
|
||
|
|
}
|
||
|
|
|
||
|
|
attribute.transform3D = scaleTransform;
|
||
|
|
}
|
||
|
|
return attributesCopy;
|
||
|
|
}
|
||
|
|
|
||
|
|
- (BOOL)shouldInvalidateLayoutForBoundsChange:(CGRect)newBounds {
|
||
|
|
return YES;
|
||
|
|
}
|
||
|
|
|
||
|
|
@end
|
||
|
|
|