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Telegram/Telegraph/TGEditableCollectionItemView.m

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/*
* This is the source code of Telegram for iOS v. 1.1
* It is licensed under GNU GPL v. 2 or later.
* You should have received a copy of the license in this archive (see LICENSE).
*
* Copyright Peter Iakovlev, 2013.
*/
#import "TGEditableCollectionItemView.h"
#import "TGCollectionMenuView.h"
#import "TGEditingScrollView.h"
#import "TGImageUtils.h"
#import "TGFont.h"
@interface TGEditableCollectionItemView () <TGEditingScrollViewDelegate>
{
TGEditingScrollView *_editingScrollView;
UIImageView *_deleteIndicator;
UIButton *_actionButton;
NSString *_optionText;
}
@end
@implementation TGEditableCollectionItemView
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self != nil)
{
_enableEditing = true;
_editingScrollView = [[TGEditingScrollView alloc] init];
_editingScrollView.editingDelegate = self;
[self addSubview:_editingScrollView];
}
return self;
}
- (void)prepareForReuse
{
[super prepareForReuse];
[_editingScrollView setOptionsAreRevealed:false];
}
- (UIView *)editingContentView
{
return _editingScrollView;
}
- (NSString *)optionText
{
if (_optionText == nil)
_optionText = TGLocalized(@"Common.Delete");
return _optionText;
}
- (void)setOptionText:(NSString *)optionText
{
if (_actionButton != nil)
[_actionButton setTitle:optionText forState:UIControlStateNormal];
_optionText = optionText;
}
static TGCollectionMenuView *_findCollectionMenuView(UIView *baseView)
{
if (baseView == nil || [baseView isKindOfClass:[TGCollectionMenuView class]])
return (TGCollectionMenuView *)baseView;
return _findCollectionMenuView(baseView.superview);
}
- (TGCollectionMenuView *)_collectionMenuView
{
return _findCollectionMenuView(self.superview);
}
- (void)reorderSelfToFront
{
int index = -1;
int maxCellIndex = -1;
int selfIndex = -1;
for (UIView *sibling in self.superview.subviews)
{
index++;
if ([sibling isKindOfClass:[TGCollectionItemView class]])
maxCellIndex = MAX(index, maxCellIndex);
if (sibling == self)
selfIndex = index;
}
if (maxCellIndex != -1 && selfIndex != -1 && maxCellIndex != selfIndex)
[self.superview exchangeSubviewAtIndex:maxCellIndex withSubviewAtIndex:selfIndex];
}
- (UIButton *)actionButton
{
if (_actionButton == nil)
{
_actionButton = [[UIButton alloc] init];
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_actionButton.backgroundColor = _indicatorMode == TGEditableCollectionItemViewIndicatorAdd ? TGAccentColor() : TGDestructiveAccentColor();
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[_actionButton setTitle:self.optionText forState:UIControlStateNormal];
[_actionButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
_actionButton.titleLabel.font = TGSystemFontOfSize(18);
[_actionButton addTarget:self action:@selector(optionButtonPressed:) forControlEvents:UIControlEventTouchUpInside];
[self addSubview:_actionButton];
}
return _actionButton;
}
- (void)setEnableEditing:(bool)enableEditing
{
[self setEnableEditing:enableEditing animated:false];
}
- (void)setEnableEditing:(bool)enableEditing animated:(bool)animated
{
if (_enableEditing != enableEditing)
{
_enableEditing = enableEditing;
if (!_enableEditing)
[_editingScrollView setOptionsAreRevealed:false animated:animated];
_editingScrollView.disableScroll = !_enableEditing;
if (_deleteIndicator != nil)
{
CGFloat deleteIndicatorAlpha = (_enableEditing && _showsDeleteIndicator) ? 1.0f : 0.0f;
if (ABS(_deleteIndicator.alpha - deleteIndicatorAlpha) > FLT_EPSILON)
{
if (animated)
{
[UIView animateWithDuration:0.3 animations:^
{
_deleteIndicator.alpha = deleteIndicatorAlpha;
}];
}
else
_deleteIndicator.alpha = deleteIndicatorAlpha;
}
}
}
}
- (void)editingScrollViewOptionsOffsetChanged:(TGEditingScrollView *)__unused editingScrollView
{
if (_editingScrollView.bounds.origin.x > FLT_EPSILON)
[self actionButton];
[self _layoutActionButton];
}
- (void)editingScrollViewWillRevealOptions:(TGEditingScrollView *)__unused editingScrollView
{
[self reorderSelfToFront];
[[self _collectionMenuView] _setEditingCell:self editing:true];
}
- (void)editingScrollViewDidHideOptions:(TGEditingScrollView *)__unused editingScrollView
{
[[self _collectionMenuView] _setEditingCell:self editing:false];
}
- (void)setShowsDeleteIndicator:(bool)showsDeleteIndicator
{
[self setShowsDeleteIndicator:showsDeleteIndicator animated:false];
}
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- (void)setIndicatorMode:(TGEditableCollectionItemViewIndicator)indicatorMode {
if (_indicatorMode != indicatorMode) {
_indicatorMode = indicatorMode;
if (_deleteIndicator != nil) {
_deleteIndicator.image = _indicatorMode == TGEditableCollectionItemViewIndicatorAdd ? [UIImage imageNamed:@"ModernMenuAddIcon.png"] : [UIImage imageNamed:@"ModernMenuDeleteIcon.png"];
}
if (_actionButton != nil) {
_actionButton.backgroundColor = _indicatorMode == TGEditableCollectionItemViewIndicatorAdd ? TGAccentColor() : TGDestructiveAccentColor();
}
}
}
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- (void)setShowsDeleteIndicator:(bool)showsDeleteIndicator animated:(bool)animated
{
if (_showsDeleteIndicator != showsDeleteIndicator)
{
if (_deleteIndicator == nil)
{
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_deleteIndicator = [[UIImageView alloc] initWithImage:_indicatorMode == TGEditableCollectionItemViewIndicatorAdd ? [UIImage imageNamed:@"ModernMenuAddIcon.png"] : [UIImage imageNamed:@"ModernMenuDeleteIcon.png"]];
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_deleteIndicator.userInteractionEnabled = true;
[_deleteIndicator addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(deleteIndicatorTapGesture:)]];
_deleteIndicator.alpha = 0.0f;
[_editingScrollView addSubview:_deleteIndicator];
[self _layoutDeleteIndicator];
}
_showsDeleteIndicator = showsDeleteIndicator;
if (animated)
{
[UIView animateWithDuration:0.3 delay:0.0 options:0 animations:^
{
_deleteIndicator.alpha = _enableEditing && _showsDeleteIndicator ? 1.0f : 0.0f;
[self layoutSubviews];
if (!_showsDeleteIndicator)
[_editingScrollView setOptionsAreRevealed:false animated:false];
} completion:nil];
}
else
{
_deleteIndicator.alpha = _enableEditing && _showsDeleteIndicator ? 1.0f : 0.0f;
if (!_showsDeleteIndicator)
[_editingScrollView setOptionsAreRevealed:false animated:false];
[self setNeedsLayout];
}
_editingScrollView.lockScroll = showsDeleteIndicator;
_editingScrollView.disableScroll = !_enableEditing;
}
}
- (void)setShowsEditingOptions:(bool)showsEditingOptions animated:(bool)animated
{
if (showsEditingOptions != _editingScrollView.optionsAreRevealed)
{
if (showsEditingOptions)
{
[self actionButton];
[self _layoutActionButton];
}
if (showsEditingOptions || !animated)
{
[_editingScrollView setOptionsAreRevealed:true animated:animated];
}
else
{
[UIView animateWithDuration:0.3 delay:0.0 options:0 animations:^
{
[_editingScrollView setOptionsAreRevealed:false animated:false];
} completion:nil];
}
}
}
- (void)_layoutDeleteIndicator
{
CGSize deleteIndicatorSize = _deleteIndicator.bounds.size;
_deleteIndicator.frame = CGRectMake((_showsDeleteIndicator ? 12.0f : -deleteIndicatorSize.width), CGFloor((self.bounds.size.height - deleteIndicatorSize.height) / 2.0f) + 1.0f, deleteIndicatorSize.width, deleteIndicatorSize.height);
}
- (void)_layoutActionButton
{
CGRect bounds = _editingScrollView.bounds;
CGFloat optionsWidth = [_editingScrollView optionsWidth];
_actionButton.frame = CGRectMake(bounds.size.width - MIN(bounds.origin.x, optionsWidth), _optionsOffset.y, optionsWidth, bounds.size.height);
}
- (void)layoutSubviews
{
[super layoutSubviews];
CGRect bounds = self.bounds;
CGFloat separatorHeight = TGIsRetina() ? 0.5f : 1.0f;
_editingScrollView.contentSize = CGSizeMake(bounds.size.width + 82.0f, bounds.size.height + separatorHeight);
_editingScrollView.frame = CGRectMake(0.0f, 0.0f, bounds.size.width, bounds.size.height + separatorHeight);
if (_deleteIndicator != nil)
[self _layoutDeleteIndicator];
}
#pragma mark -
- (void)_requestSelection
{
[[self _collectionMenuView] _selectCell:self];
}
#pragma mark -
- (void)deleteIndicatorTapGesture:(UITapGestureRecognizer *)recognizer
{
if (recognizer.state == UIGestureRecognizerStateRecognized)
{
[self actionButton];
[self _layoutActionButton];
[_editingScrollView setOptionsAreRevealed:true animated:true];
}
}
- (void)optionButtonPressed:(UIButton *)button
{
if (button == _actionButton)
[self deleteAction];
}
- (void)deleteAction
{
}
@end