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//
// ProductViewHeader.m
// Mobile Buy SDK
//
// Created by Shopify.
// Copyright (c) 2015 Shopify Inc. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// 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 THE
// AUTHORS OR COPYRIGHT HOLDERS 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 "ProductViewHeader.h"
#import "AsyncImageView.h"
#import "GradientView.h"
#import "ProductImageCell.h"
#import "Theme+Additions.h"
#import "HeaderOverlayView.h"
@interface ProductViewHeader ()
@property (nonatomic, strong) UIPageControl *pageControl;
@property (nonatomic, strong) UIView *bottomGradientContainerView;
@property (nonatomic, strong) GradientView *bottomGradientView;
@property (nonatomic, strong) NSLayoutConstraint *bottomGradientViewLayoutConstraintHeight;
@property (nonatomic, strong) NSLayoutConstraint *bottomGradientViewBottomContraint;
@end
@implementation ProductViewHeader
- (instancetype)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
self.backgroundColor = [UIColor clearColor];
UICollectionViewFlowLayout *collectionViewFlowLayout = [[UICollectionViewFlowLayout alloc] init];
collectionViewFlowLayout.sectionInset = UIEdgeInsetsZero;
collectionViewFlowLayout.minimumLineSpacing = 0;
collectionViewFlowLayout.itemSize = CGSizeMake(CGRectGetWidth(frame), CGRectGetHeight(frame));
collectionViewFlowLayout.scrollDirection = UICollectionViewScrollDirectionHorizontal;
_collectionView = [[UICollectionView alloc] initWithFrame:CGRectZero collectionViewLayout:collectionViewFlowLayout];
_collectionView.backgroundColor = [UIColor clearColor];
_collectionView.showsHorizontalScrollIndicator = NO;
_collectionView.pagingEnabled = YES;
_collectionView.clipsToBounds = NO;
_collectionView.translatesAutoresizingMaskIntoConstraints = NO;
[_collectionView registerClass:[ProductImageCell class] forCellWithReuseIdentifier:@"Cell"];
[self addSubview:_collectionView];
[self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|[_collectionView]|"
options:0
metrics:nil
views:NSDictionaryOfVariableBindings(_collectionView)]];
[self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|[_collectionView]|"
options:0
metrics:nil
views:NSDictionaryOfVariableBindings(_collectionView)]];
_bottomGradientContainerView = [[UIView alloc] init];
_bottomGradientContainerView.backgroundColor = [UIColor clearColor];
_bottomGradientContainerView.translatesAutoresizingMaskIntoConstraints = NO;
_bottomGradientContainerView.clipsToBounds = YES;
[self addSubview:_bottomGradientContainerView];
[self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|[_bottomGradientContainerView]|"
options:0
metrics:nil
views:NSDictionaryOfVariableBindings(_bottomGradientContainerView)]];
[self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:[_bottomGradientContainerView]|"
options:0
metrics:nil
views:NSDictionaryOfVariableBindings(_bottomGradientContainerView)]];
_bottomGradientViewLayoutConstraintHeight = [NSLayoutConstraint constraintWithItem:_bottomGradientContainerView
attribute:NSLayoutAttributeHeight
relatedBy:NSLayoutRelationEqual
toItem:nil
attribute:NSLayoutAttributeNotAnAttribute
multiplier:1.0
constant:kBuyBottomGradientHeightWithoutPageControl];
[self addConstraint:_bottomGradientViewLayoutConstraintHeight];
_bottomGradientView = [[GradientView alloc] init];
_bottomGradientView.userInteractionEnabled = NO;
_bottomGradientView.topColor = [UIColor clearColor];
_bottomGradientView.bottomColor = [UIColor colorWithWhite:0 alpha:0.05f];
_bottomGradientView.translatesAutoresizingMaskIntoConstraints = NO;
[_bottomGradientContainerView addSubview:_bottomGradientView];
[_bottomGradientContainerView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|[_bottomGradientView]|"
options:0
metrics:nil
views:NSDictionaryOfVariableBindings(_bottomGradientView)]];
[_bottomGradientContainerView addConstraint:[NSLayoutConstraint constraintWithItem:_bottomGradientView
attribute:NSLayoutAttributeHeight
relatedBy:NSLayoutRelationEqual
toItem:_bottomGradientContainerView
attribute:NSLayoutAttributeHeight
multiplier:1.0
constant:0.0]];
_bottomGradientViewBottomContraint = [NSLayoutConstraint constraintWithItem:_bottomGradientView
attribute:NSLayoutAttributeBottom
relatedBy:NSLayoutRelationEqual
toItem:_bottomGradientContainerView
attribute:NSLayoutAttributeBottom
multiplier:1.0
constant:0.0];
[_bottomGradientContainerView addConstraint:_bottomGradientViewBottomContraint];
_pageControl = [[UIPageControl alloc] init];
_pageControl.hidesForSinglePage = YES;
_pageControl.translatesAutoresizingMaskIntoConstraints = NO;
_pageControl.userInteractionEnabled = NO;
[_bottomGradientView addSubview:_pageControl];
[_bottomGradientView addConstraint:[NSLayoutConstraint constraintWithItem:_pageControl
attribute:NSLayoutAttributeBottom
relatedBy:NSLayoutRelationEqual
toItem:_bottomGradientView
attribute:NSLayoutAttributeBottom
multiplier:1.0
constant:0.0]];
[_bottomGradientView addConstraint:[NSLayoutConstraint constraintWithItem:_pageControl
attribute:NSLayoutAttributeWidth
relatedBy:NSLayoutRelationEqual
toItem:_bottomGradientView
attribute:NSLayoutAttributeWidth
multiplier:1.0
constant:0.0]];
[_bottomGradientView addConstraint:[NSLayoutConstraint constraintWithItem:_pageControl
attribute:NSLayoutAttributeHeight
relatedBy:NSLayoutRelationEqual
toItem:nil
attribute:NSLayoutAttributeNotAnAttribute
multiplier:1.0
constant:kBuyPageControlHeight]];
_productViewHeaderOverlay = [[HeaderOverlayView alloc] init];
_productViewHeaderOverlay.translatesAutoresizingMaskIntoConstraints = NO;
[self addSubview:_productViewHeaderOverlay];
[self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|[_productViewHeaderOverlay]|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(_productViewHeaderOverlay)]];
[self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|[_productViewHeaderOverlay]|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(_productViewHeaderOverlay)]];
}
return self;
}
- (void)setNumberOfPages:(NSInteger)numberOfPages
{
self.pageControl.numberOfPages = numberOfPages;
if (self.pageControl.numberOfPages == 0) {
self.bottomGradientViewLayoutConstraintHeight.constant = kBuyBottomGradientHeightWithoutPageControl;
self.bottomGradientView.bottomColor = [UIColor colorWithWhite:0 alpha:0.05f];
} else {
self.bottomGradientViewLayoutConstraintHeight.constant = kBuyBottomGradientHeightWithPageControl;
self.bottomGradientView.bottomColor = [UIColor colorWithWhite:0 alpha:0.15f];
}
}
- (void)setCurrentPage:(NSInteger)currentPage
{
self.pageControl.currentPage = currentPage;
}
- (CGFloat)imageHeightWithScrollViewDidScroll:(UIScrollView *)scrollView
{
self.bottomGradientViewBottomContraint.constant = MAX(scrollView.contentOffset.y / 4, 0);
CGRect visibleRect = (CGRect){.origin = self.collectionView.contentOffset, .size = self.collectionView.bounds.size};
CGPoint visiblePoint = CGPointMake(CGRectGetMidX(visibleRect), CGRectGetMidY(visibleRect));
NSIndexPath *visibleIndexPath = [self.collectionView indexPathForItemAtPoint:visiblePoint];
ProductImageCell *cell = (ProductImageCell*)[self.collectionView cellForItemAtIndexPath:visibleIndexPath];
if (cell) {
[cell setContentOffset:scrollView.contentOffset];
return cell.productImageViewConstraintHeight.constant;
} else {
cell = [self.collectionView.visibleCells firstObject];
return cell.productImageViewConstraintHeight.constant;
}
}
- (void)setImageForSelectedVariant:(BUYProductVariant*)productVariant withImages:(NSArray*)images
{
[self setNumberOfPages:[images count]];
if (CGSizeEqualToSize(self.collectionView.contentSize, CGSizeZero) == NO) {
[images enumerateObjectsUsingBlock:^(BUYImageLink *image, NSUInteger i, BOOL *stop) {
for (NSNumber *variantId in image.variantIds) {
if ([variantId isEqualToNumber:productVariant.identifier]) {
[self.collectionView scrollToItemAtIndexPath:[NSIndexPath indexPathForRow:i inSection:0] atScrollPosition:UICollectionViewScrollPositionCenteredHorizontally animated:NO];
self.pageControl.currentPage = i;
*stop = YES;
break;
}
}
}];
}
}
@end