mirror of
https://github.com/samuelclay/NewsBlur.git
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231 lines
8.7 KiB
Objective-C
Executable file
231 lines
8.7 KiB
Objective-C
Executable file
//
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// PullToRefreshView.m
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// Grant Paul (chpwn)
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//
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// (based on EGORefreshTableHeaderView)
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//
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// Created by Devin Doty on 10/14/09October14.
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// Copyright 2009 enormego. All rights reserved.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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//
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#import "PullToRefreshView.h"
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#define TEXT_COLOR [UIColor colorWithRed:(87.0/255.0) green:(108.0/255.0) blue:(137.0/255.0) alpha:1.0]
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#define FLIP_ANIMATION_DURATION 0.18f
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@interface PullToRefreshView (Private)
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@property (nonatomic, assign) PullToRefreshViewState state;
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@end
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@implementation PullToRefreshView
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@synthesize delegate, scrollView;
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- (void)showActivity:(BOOL)shouldShow animated:(BOOL)animated {
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if (shouldShow) [activityView startAnimating];
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else [activityView stopAnimating];
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[UIView beginAnimations:nil context:nil];
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[UIView setAnimationDuration:(animated ? 0.1f : 0.0)];
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arrowImage.opacity = (shouldShow ? 0.0 : 1.0);
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[UIView commitAnimations];
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}
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- (void)setImageFlipped:(BOOL)flipped {
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[UIView beginAnimations:nil context:NULL];
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[UIView setAnimationDuration:0.1f];
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arrowImage.transform = (flipped ? CATransform3DMakeRotation(M_PI * 2, 0.0f, 0.0f, 1.0f) : CATransform3DMakeRotation(M_PI, 0.0f, 0.0f, 1.0f));
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[UIView commitAnimations];
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}
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- (id)initWithScrollView:(UIScrollView *)scroll {
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CGRect frame = CGRectMake(0.0f, 0.0f - scroll.bounds.size.height, scroll.bounds.size.width, scroll.bounds.size.height);
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if ((self = [super initWithFrame:frame])) {
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scrollView = scroll;
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[scrollView addObserver:self forKeyPath:@"contentOffset" options:NSKeyValueObservingOptionNew context:NULL];
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UIColor *bgColor = UIColorFromRGB(0xF2F2F2);
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self.autoresizingMask = UIViewAutoresizingFlexibleWidth;
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self.backgroundColor = bgColor;
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lastUpdatedLabel = [[UILabel alloc] initWithFrame:CGRectMake(0.0f, frame.size.height - 30.0f, self.frame.size.width, 20.0f)];
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lastUpdatedLabel.autoresizingMask = UIViewAutoresizingFlexibleWidth;
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lastUpdatedLabel.font = [UIFont systemFontOfSize:12.0f];
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lastUpdatedLabel.textColor = TEXT_COLOR;
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lastUpdatedLabel.shadowColor = [UIColor colorWithWhite:0.9f alpha:1.0f];
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lastUpdatedLabel.shadowOffset = CGSizeMake(0.0f, 1.0f);
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lastUpdatedLabel.backgroundColor = [UIColor clearColor];
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lastUpdatedLabel.textAlignment = NSTextAlignmentCenter;
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[self addSubview:lastUpdatedLabel];
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statusLabel = [[UILabel alloc] initWithFrame:CGRectMake(0.0f, frame.size.height - 48.0f, self.frame.size.width, 20.0f)];
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statusLabel.autoresizingMask = UIViewAutoresizingFlexibleWidth;
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statusLabel.font = [UIFont boldSystemFontOfSize:13.0f];
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statusLabel.textColor = TEXT_COLOR;
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statusLabel.shadowColor = [UIColor colorWithWhite:0.9f alpha:1.0f];
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statusLabel.shadowOffset = CGSizeMake(0.0f, 1.0f);
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statusLabel.backgroundColor = [UIColor clearColor];
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statusLabel.textAlignment = NSTextAlignmentCenter;
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[self addSubview:statusLabel];
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arrowImage = [[CALayer alloc] init];
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arrowImage.frame = CGRectMake(25.0f, frame.size.height - 60.0f, 24.0f, 52.0f);
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arrowImage.contentsGravity = kCAGravityResizeAspect;
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arrowImage.contents = (id) [UIImage imageNamed:@"arrow"].CGImage;
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#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 40000
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if ([[UIScreen mainScreen] respondsToSelector:@selector(scale)]) {
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arrowImage.contentsScale = [[UIScreen mainScreen] scale];
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}
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#endif
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[self.layer addSublayer:arrowImage];
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activityView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
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activityView.frame = CGRectMake(30.0f, frame.size.height - 38.0f, 20.0f, 20.0f);
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[self addSubview:activityView];
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[self setState:PullToRefreshViewStateNormal];
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}
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return self;
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}
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#pragma mark -
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#pragma mark Setters
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- (void)refreshLastUpdatedDate {
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NSDate *date = [NSDate date];
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if ([delegate respondsToSelector:@selector(pullToRefreshViewLastUpdated:)])
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date = [delegate pullToRefreshViewLastUpdated:self];
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NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
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formatter.doesRelativeDateFormatting = YES;
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formatter.timeStyle = NSDateFormatterShortStyle;
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formatter.dateStyle = NSDateFormatterMediumStyle;
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lastUpdatedLabel.text = [NSString stringWithFormat:@"Updated %@",
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[formatter stringFromDate:date]];
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// [@[[NSLocale localeWithLocaleIdentifier:@"de_DE"], [NSLocale localeWithLocaleIdentifier:@"es_ES"],[NSLocale localeWithLocaleIdentifier:@"en_US"]] enumerateObjectsUsingBlock:^(NSLocale *locale, NSUInteger idx, BOOL *stop) {
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// [formatter setLocale:locale];
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// [timeFormatter setLocale:locale];
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// [formatter setTimeZone:[NSTimeZone systemTimeZone]];
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// NSString *dateString=[formatter stringFromDate:date];
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// NSString *timeString = [timeFormatter stringFromDate:date];
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// NSLog(@"%@ %@", dateString, timeString);
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// }];
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[formatter release];
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}
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- (void)setState:(PullToRefreshViewState)state_ {
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state = state_;
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switch (state) {
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case PullToRefreshViewStateReady:
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statusLabel.text = @"Release to refresh...";
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[self showActivity:NO animated:NO];
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[self setImageFlipped:YES];
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[self refreshLastUpdatedDate];
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scrollView.contentInset = UIEdgeInsetsZero;
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break;
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case PullToRefreshViewStateNormal:
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statusLabel.text = @"Pull down to refresh...";
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[self showActivity:NO animated:NO];
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[self setImageFlipped:NO];
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[self refreshLastUpdatedDate];
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scrollView.contentInset = UIEdgeInsetsZero;
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break;
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case PullToRefreshViewStateLoading:
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statusLabel.text = @"Loading...";
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[self showActivity:YES animated:YES];
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[self setImageFlipped:NO];
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[self refreshLastUpdatedDate];
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scrollView.contentInset = UIEdgeInsetsMake(60.0f, 0.0f, 0.0f, 0.0f);
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break;
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default:
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break;
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}
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}
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#pragma mark -
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#pragma mark UIScrollView
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- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context {
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if ([keyPath isEqualToString:@"contentOffset"]) {
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if (scrollView.isDragging) {
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if (state == PullToRefreshViewStateReady) {
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if (scrollView.contentOffset.y > -65.0f && scrollView.contentOffset.y < 0.0f)
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[self setState:PullToRefreshViewStateNormal];
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} else if (state == PullToRefreshViewStateNormal) {
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if (scrollView.contentOffset.y < -65.0f)
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[self setState:PullToRefreshViewStateReady];
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} else if (state == PullToRefreshViewStateLoading) {
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if (scrollView.contentOffset.y >= 0)
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scrollView.contentInset = UIEdgeInsetsZero;
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else
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scrollView.contentInset = UIEdgeInsetsMake(MIN(-scrollView.contentOffset.y, 60.0f), 0, 0, 0);
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}
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} else {
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if (state == PullToRefreshViewStateReady) {
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[UIView beginAnimations:nil context:NULL];
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[UIView setAnimationDuration:0.2f];
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[self setState:PullToRefreshViewStateLoading];
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[UIView commitAnimations];
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if ([delegate respondsToSelector:@selector(pullToRefreshViewShouldRefresh:)])
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[delegate pullToRefreshViewShouldRefresh:self];
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}
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}
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}
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}
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- (void)finishedLoading {
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if (state == PullToRefreshViewStateLoading) {
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[UIView beginAnimations:nil context:NULL];
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[UIView setAnimationDuration:0.3f];
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[self setState:PullToRefreshViewStateNormal];
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[UIView commitAnimations];
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}
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}
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#pragma mark -
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#pragma mark Dealloc
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- (void)dealloc {
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[scrollView removeObserver:self forKeyPath:@"contentOffset"];
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[arrowImage release];
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[activityView release];
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[statusLabel release];
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[lastUpdatedLabel release];
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[super dealloc];
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}
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@end
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