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Merge pull request #706 from edx/aleffert/badges-ui
First part of badging UI changes
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Original file line number | Diff line number | Diff line change |
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// | ||
// TabContainerView.swift | ||
// edX | ||
// | ||
// Created by Akiva Leffert on 4/5/16. | ||
// Copyright © 2016 edX. All rights reserved. | ||
// | ||
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import Foundation | ||
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// Simple tab view with a segmented control at the top | ||
class TabContainerView : UIView { | ||
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struct Item { | ||
let name : String | ||
let view : UIView | ||
let identifier : String | ||
} | ||
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private let control = UISegmentedControl() | ||
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private let stackView = TZStackView() | ||
private var activeTabBodyView : UIView? = nil | ||
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private var currentIdentifier : String? | ||
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override init(frame: CGRect) { | ||
super.init(frame: frame) | ||
stackView.insertArrangedSubview(control, atIndex: 0) | ||
stackView.axis = .Vertical | ||
stackView.alignment = .Fill | ||
stackView.spacing = StandardVerticalMargin | ||
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addSubview(stackView) | ||
stackView.snp_makeConstraints {make in | ||
make.leading.equalTo(self.snp_leadingMargin) | ||
make.trailing.equalTo(self.snp_trailingMargin) | ||
make.top.equalTo(self.snp_topMargin) | ||
make.bottom.equalTo(self.snp_bottomMargin) | ||
} | ||
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control.oex_addAction({[weak self] control in | ||
let index = (control as! UISegmentedControl).selectedSegmentIndex | ||
self?.showTabAtIndex(index) | ||
}, forEvents: .ValueChanged) | ||
} | ||
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required init?(coder aDecoder: NSCoder) { | ||
fatalError("init(coder:) has not been implemented") | ||
} | ||
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var items : [Item] = [] { | ||
didSet { | ||
control.removeAllSegments() | ||
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for (index, item) in items.enumerate() { | ||
control.insertSegmentWithTitle(item.name, atIndex: control.numberOfSegments, animated: false) | ||
if item.identifier == currentIdentifier { | ||
showTabAtIndex(index) | ||
} | ||
} | ||
if control.selectedSegmentIndex == UISegmentedControlNoSegment && items.count > 0 { | ||
showTabAtIndex(0) | ||
} | ||
else { | ||
currentIdentifier = nil | ||
} | ||
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if items.count < 2 { | ||
control.hidden = true | ||
} | ||
} | ||
} | ||
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private func showTabAtIndex(index: Int) { | ||
guard index != UISegmentedControlNoSegment else { | ||
return | ||
} | ||
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activeTabBodyView?.removeFromSuperview() | ||
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let item = items[index] | ||
control.selectedSegmentIndex = index | ||
currentIdentifier = item.identifier | ||
stackView.addArrangedSubview(item.view) | ||
activeTabBodyView = item.view | ||
} | ||
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private func indexOfItemWithIdentifier(identifier : String) -> Int? { | ||
return items.firstIndexMatching {$0.identifier == identifier } | ||
} | ||
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func showTabWithIdentifier(identifier : String) { | ||
if let index = indexOfItemWithIdentifier(identifier) { | ||
showTabAtIndex(index) | ||
} | ||
} | ||
} | ||
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// Only used for testing | ||
extension TabContainerView { | ||
func t_isShowingViewForItem(item : Item) -> Bool { | ||
let viewsMatch = stackView.arrangedSubviews == [control, item.view] | ||
let indexMatches = indexOfItemWithIdentifier(item.identifier) == control.selectedSegmentIndex | ||
let identifierMatches = currentIdentifier == item.identifier | ||
return viewsMatch && indexMatches && identifierMatches | ||
} | ||
} |
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