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64e2323a4e
- ASLayoutNode no longer has 'size' constraint during its initialization.. - ASLayoutNode no longer needs parentSize to calculate its layout.
47 lines
2.0 KiB
Objective-C
47 lines
2.0 KiB
Objective-C
/*
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* Copyright (c) 2014-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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*/
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#import <AsyncDisplayKit/ASLayoutNode.h>
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typedef NS_OPTIONS(NSUInteger, ASCenterLayoutNodeCenteringOptions) {
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/** The child is positioned in {0,0} relatively to the layout bounds */
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ASCenterLayoutNodeCenteringNone = 0,
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/** The child is centered along the X axis */
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ASCenterLayoutNodeCenteringX = 1 << 0,
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/** The child is centered along the Y axis */
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ASCenterLayoutNodeCenteringY = 1 << 1,
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/** Convenience option to center both along the X and Y axis */
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ASCenterLayoutNodeCenteringXY = ASCenterLayoutNodeCenteringX | ASCenterLayoutNodeCenteringY
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};
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typedef NS_OPTIONS(NSUInteger, ASCenterLayoutNodeSizingOptions) {
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/** The node will take up the maximum size possible */
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ASCenterLayoutNodeSizingOptionDefault,
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/** The node will take up the minimum size possible along the X axis */
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ASCenterLayoutNodeSizingOptionMinimumX = 1 << 0,
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/** The node will take up the minimum size possible along the Y axis */
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ASCenterLayoutNodeSizingOptionMinimumY = 1 << 1,
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/** Convenience option to take up the minimum size along both the X and Y axis */
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ASCenterLayoutNodeSizingOptionMinimumXY = ASCenterLayoutNodeSizingOptionMinimumX | ASCenterLayoutNodeSizingOptionMinimumY,
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};
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/** Lays out a single child layout node and position it so that it is centered into the layout bounds. */
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@interface ASCenterLayoutNode : ASLayoutNode
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/**
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@param centeringOptions, see ASCenterLayoutNodeCenteringOptions.
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@param child The child to center.
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*/
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+ (instancetype)newWithCenteringOptions:(ASCenterLayoutNodeCenteringOptions)centeringOptions
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sizingOptions:(ASCenterLayoutNodeSizingOptions)sizingOptions
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child:(ASLayoutNode *)child;
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@end
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