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45 lines
2.0 KiB
Objective-C
45 lines
2.0 KiB
Objective-C
//
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// FLEXExplorerToolbarItem.h
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// Flipboard
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//
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// Created by Ryan Olson on 4/4/14.
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// Copyright (c) 2020 FLEX Team. All rights reserved.
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//
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#import <UIKit/UIKit.h>
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NS_ASSUME_NONNULL_BEGIN
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@interface FLEXExplorerToolbarItem : UIButton
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+ (instancetype)itemWithTitle:(NSString *)title image:(UIImage *)image;
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/// @param backupItem a toolbar item to use in place of this item when it becomes disabled.
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/// Items without a sibling item exhibit expected behavior when they become disabled, and are greyed out.
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+ (instancetype)itemWithTitle:(NSString *)title image:(UIImage *)image sibling:(nullable FLEXExplorerToolbarItem *)backupItem;
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/// If a toolbar item has a sibling, the item will replace itself with its
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/// sibling when it becomes disabled, and vice versa when it becomes enabled again.
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@property (nonatomic, readonly) FLEXExplorerToolbarItem *sibling;
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/// When a toolbar item has a sibling and it becomes disabled, the sibling is the view
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/// that should be added to or removed from a new or existing toolbar. This property
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/// alleviates the programmer from determining whether to use \c item or \c item.sibling
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/// or \c item.sibling.sibling and so on. Yes, sibling items can also have siblings so
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/// that each item which becomes disabled may present another item in its place, creating
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/// a "stack" of toolbar items. This behavior is useful for making buttons which occupy
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/// the same space under different states.
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///
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/// With this in mind, you should never access a stored toolbar item's view properties
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/// such as \c frame or \c superview directly; you should access them on \c currentItem.
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/// If you are trying to modify the frame of an item, and the item itself is not currently
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/// displayed but instead its sibling is being displayed, then your changes could be ignored.
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///
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/// @return the result of the item's sibling's \c currentItem,
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/// if this item has a sibling and this item is disabled, otherwise this item.
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@property (nonatomic, readonly) FLEXExplorerToolbarItem *currentItem;
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@end
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NS_ASSUME_NONNULL_END
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