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[ASRelativeLayoutSpec] New core layout spec type: Relative Position, now powers Center as well.

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This spec allows positioning a child at any 9-part box position (corners, edges, or center).
This commit is contained in:
Sam Stow
2016-01-23 15:04:06 -08:00
committed by Scott Goodson
parent 4297cb1eb5
commit 086bd8a52b
36 changed files with 380 additions and 73 deletions
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17
AsyncDisplayKit/Layout/ASCenterLayoutSpec.h
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@@ -8,7 +8,7 @@
*
*/
#import <AsyncDisplayKit/ASLayoutSpec.h>
#import <AsyncDisplayKit/ASRelativeLayoutSpec.h>
/** How the child is centered within the spec. */
typedef NS_OPTIONS(NSUInteger, ASCenterLayoutSpecCenteringOptions) {
@@ -25,19 +25,22 @@ typedef NS_OPTIONS(NSUInteger, ASCenterLayoutSpecCenteringOptions) {
/** How much space the spec will take up. */
typedef NS_OPTIONS(NSUInteger, ASCenterLayoutSpecSizingOptions) {
/** The spec will take up the maximum size possible */
ASCenterLayoutSpecSizingOptionDefault,
ASCenterLayoutSpecSizingOptionDefault = ASRelativeLayoutSpecSizingOptionDefault,
/** The spec will take up the minimum size possible along the X axis */
ASCenterLayoutSpecSizingOptionMinimumX = 1 << 0,
ASCenterLayoutSpecSizingOptionMinimumX = ASRelativeLayoutSpecSizingOptionMinimumWidth,
/** The spec will take up the minimum size possible along the Y axis */
ASCenterLayoutSpecSizingOptionMinimumY = 1 << 1,
ASCenterLayoutSpecSizingOptionMinimumY = ASRelativeLayoutSpecSizingOptionMinimumHeight,
/** Convenience option to take up the minimum size along both the X and Y axis */
ASCenterLayoutSpecSizingOptionMinimumXY = ASCenterLayoutSpecSizingOptionMinimumX | ASCenterLayoutSpecSizingOptionMinimumY,
ASCenterLayoutSpecSizingOptionMinimumXY = ASRelativeLayoutSpecSizingOptionMinimumSize
};
NS_ASSUME_NONNULL_BEGIN
/** Lays out a single layoutable child and position it so that it is centered into the layout bounds. */
@interface ASCenterLayoutSpec : ASLayoutSpec
/** Lays out a single layoutable child and position it so that it is centered into the layout bounds.
* NOTE: ASRelativeLayoutSpec offers all of the capabilities of Center, and more.
* Check it out if you would like to be able to position the child at any corner or the middle of an edge.
*/
@interface ASCenterLayoutSpec : ASRelativeLayoutSpec
@property (nonatomic, assign) ASCenterLayoutSpecCenteringOptions centeringOptions;
@property (nonatomic, assign) ASCenterLayoutSpecSizingOptions sizingOptions;