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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 |
|---|---|---|
| @@ -0,0 +1,108 @@ | ||
| // | ||
| // TabContainerView.swift | ||
| // edX | ||
| // | ||
| // Created by Akiva Leffert on 4/5/16. | ||
| // Copyright © 2016 edX. All rights reserved. | ||
| // | ||
|
|
||
| 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 | ||
| } | ||
|
|
||
| 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 | ||
| } | ||
|
|
||
| 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) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| // 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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