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Viewing changes to Music/Controls/UODownloadPanGestureRecognizer.m

  • Committer: Tarmac
  • Author(s): Paul Hummer
  • Date: 2013-01-31 02:38:50 UTC
  • mfrom: (240.2.8 download-song)
  • Revision ID: tarmac-20130131023850-1n3q310ebc88v7mk
Add a Downloader utility, along with the SongCell gesture for downloading individual songs.

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Music/Controls/UODownloadPanGestureRecognizer.m
 
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//
 
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//  UOPanGestureRecognizer.m
 
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//  U1Music
 
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//
 
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//  Created by Paul Hummer on 1/26/13.
 
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//  Copyright (c) 2013 Canonical. All rights reserved.
 
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//
 
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#import "UODownloadPanGestureRecognizer.h"
 
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#import <UIKit/UIGestureRecognizerSubclass.h>
 
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@interface UODownloadPanGestureRecognizer () {
 
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    CGPoint start;
 
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}
 
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@end
 
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@implementation UODownloadPanGestureRecognizer
 
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@synthesize threshold;
 
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- (id)initWithTarget:(id)target action:(SEL)action {
 
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    self = [super initWithTarget:target action:action];
 
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    if (self == nil) { return self; }
 
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    threshold = 64.f;
 
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    return self;
 
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}
 
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- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
 
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    CGPoint touch = [[touches anyObject] locationInView:self.view];
 
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    if (!CGRectEqualToRect(self.handle.bounds, CGRectZero) &&
 
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        !CGRectContainsPoint(self.handle.bounds, touch)) {
 
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        self.state = UIGestureRecognizerStateCancelled;
 
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        return;
 
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    }
 
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    [super touchesBegan:touches withEvent:event];
 
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    start = [[touches anyObject] locationInView:nil];
 
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}
 
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- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
 
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    for (UITouch *touch in touches) {
 
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        CGPoint point = [touch locationInView:nil];
 
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        CGFloat offset = point.x - start.x;
 
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        if (offset < 0) {
 
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            self.state = UIGestureRecognizerStateCancelled;
 
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            return;
 
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        }
 
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        /* If we want to fire the event as soon as the threshold is reached,
 
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           we do it here. As it is, we require a release of the finger.
 
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         */
 
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    }
 
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    [super touchesMoved:touches withEvent:event];
 
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}
 
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- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
 
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    CGPoint point = [[touches anyObject] locationInView:nil];
 
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    CGFloat offset = point.x - start.x;
 
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    if (fabs(offset) > self.threshold) {
 
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        [super touchesEnded:touches withEvent:event];
 
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    } else {
 
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        self.state = UIGestureRecognizerStateCancelled;
 
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    }
 
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}
 
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@end