Packagecom.yahoo.astra.layout
Classpublic class LayoutManager

Generic layout manager for DisplayObjects.

See also

flash.display.DisplayObject
com.yahoo.astra.layout.ILayoutContainer

Public Methods
 MethodDefined by
  
hasInvalidatingEvents(target:DisplayObject):Boolean
[static] Determines if a particular DisplayObject's type has been registered with invalidating events.
LayoutManager
  
invalidateParentLayout(target:DisplayObject):void
[static] If the target's parent is a layout container, that parent will be informed that it needs to update the layout.
LayoutManager
  
registerContainerChild(child:DisplayObject):void
[static] Called by an ILayoutContainer implementation when a child is added.
LayoutManager
  
registerInvalidatingEvents(source:Class, events:Array):void
[static] Allows users to specify events that invalidate the parent layout container when fired by instances of a specific class.
LayoutManager
  
resize(target:DisplayObject, width:Number, height:Number):void
[static] If a DisplayObject that is placed into a layout container doesn't fire events for size changes, calling this function will allow its size to properly affect its parent layout.
LayoutManager
  
unregisterContainerChild(child:DisplayObject):void
[static] Called by a layout container when a child is removed.
LayoutManager
  
update(target:DisplayObject, property:String, value:Object):void
[static] Similar to LayoutManager.resize(), this function may be called to update any property of a DisplayObject and notify its parent layout container to refresh if no event normally indicates this is needed.
LayoutManager
Method detail
hasInvalidatingEvents()method
public static function hasInvalidatingEvents(target:DisplayObject):Boolean

Determines if a particular DisplayObject's type has been registered with invalidating events.

Parameters
target:DisplayObject

Returns
Boolean
invalidateParentLayout()method 
public static function invalidateParentLayout(target:DisplayObject):void

If the target's parent is a layout container, that parent will be informed that it needs to update the layout.

Parameters
target:DisplayObject
registerContainerChild()method 
public static function registerContainerChild(child:DisplayObject):void

Called by an ILayoutContainer implementation when a child is added. If the child is an instance of a class with registered events, the layout system will listen for those events.

Parameters
child:DisplayObject

See also

ILayoutContainer
registerInvalidatingEvents()method 
public static function registerInvalidatingEvents(source:Class, events:Array):void

Allows users to specify events that invalidate the parent layout container when fired by instances of a specific class.

For example, if fl.core.UIComponent fires the resize event when it is inside a layout container, the layout container will refresh its layout.

Parameters
source:Class — The class that will fire invalidating events (ie. TextField)
 
events:Array — An Array of event constants (ie. Event.CHANGE)

Example
The following code demonstrates how to specify a set of invalidating events: 
   LayoutManager.registerInvalidatingEvents( UIComponent, [ComponentEvent.RESIZE, ComponentEvent.MOVE] );

resize()method 
public static function resize(target:DisplayObject, width:Number, height:Number):void

If a DisplayObject that is placed into a layout container doesn't fire events for size changes, calling this function will allow its size to properly affect its parent layout.

Parameters
target:DisplayObject — The display object to resize
 
width:Number — The new width of the display object
 
height:Number — The new height of the display object

Example
The following code demonstrates how to resize a DisplayObject that doesn't fire an event when it resizes: 
   LayoutManager.resize( mySprite, 100, 34 );

unregisterContainerChild()method 
public static function unregisterContainerChild(child:DisplayObject):void

Called by a layout container when a child is removed. If the child is an instance of a class with registered events, the layout system will stop listening to those events.

Parameters
child:DisplayObject

See also

ILayoutContainer
update()method 
public static function update(target:DisplayObject, property:String, value:Object):void

Similar to LayoutManager.resize(), this function may be called to update any property of a DisplayObject and notify its parent layout container to refresh if no event normally indicates this is needed.

Parameters
target:DisplayObject — The display object whose property will be changed
 
property:String — The name of the property.
 
value:Object — The value of the property

Example
The following code demonstrates how to change a DisplayObject's property when that DisplayObject doesn't fire an event when the property changes: 
   LayoutManager.update(mySprite, "transform", new Transform());