76 lines
1.8 KiB
Mathematica
76 lines
1.8 KiB
Mathematica
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//The MIT License (MIT)
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//
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//Copyright (c) 2014 Rafał Augustyniak
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//
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//Permission is hereby granted, free of charge, to any person obtaining a copy of
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//this software and associated documentation files (the "Software"), to deal in
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//the Software without restriction, including without limitation the rights to
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//use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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//the Software, and to permit persons to whom the Software is furnished to do so,
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//subject to the following conditions:
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//
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//THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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//IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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//FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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//COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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//IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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//CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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#import "RATreeNode.h"
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#import "RATreeNodeItem.h"
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@interface RATreeNode () {
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BOOL _expanded;
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}
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@property (nonatomic) BOOL expanded;
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@property (nonatomic, strong) RATreeNodeItem *lazyItem;
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@property (nonatomic, copy) BOOL (^expandedBlock)(id);
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@end
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@implementation RATreeNode
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- (id)initWithLazyItem:(RATreeNodeItem *)item expandedBlock:(BOOL (^)(id))expandedBlock;
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{
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self = [super init];
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if (self) {
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_lazyItem = item;
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_expandedBlock = expandedBlock;
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}
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return self;
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}
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#pragma mark -
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- (RATreeNodeItem *)item
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{
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return self.lazyItem.item;
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}
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- (BOOL)expanded
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{
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if (self.expandedBlock) {
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_expanded = self.expandedBlock(self.item);
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self.expandedBlock = nil;
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}
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return _expanded;
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}
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- (void)setExpanded:(BOOL)expanded
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{
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self.expandedBlock = nil;
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_expanded = expanded;
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}
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@end
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