The ILayoutManagerClient interface defines the interface
that a component must implement to participate in the
LayoutManager's commit/measurement/layout sequence.
Objects that implement this interface can be passed to the
LayoutManager's invalidateProperties() method.
When the LayoutManager reaches the commit properties phase,
the LayoutManager invokes this object's validateProperties()
method.
Similarly, if an object is passed to the LayoutManager's
invalidateSize() method, then the LayoutManager
calls that object's validateSize() method
during its measurement phase, and if an object is passed
to LayoutManager's invalidateDisplayList() method,
then the LayoutManager calls its validateDisplayList() method
during the layout phase.
The ILayoutManagerClient interface is implemented by the UIComponent
and ProgrammaticSkin classes.
A flag that determines if an object has been through all three phases
of layout validation (provided that any were required)
This flag should only be modified by the LayoutManager.
Validates the measured size of the component
If the LayoutManager.invalidateSize() method is called with
this ILayoutManagerClient, then the validateSize() method
is called when it's time to do measurements.
ILayoutManagerClient
Property Detail
initialized
property
initialized:Boolean
Language Version :
ActionScript 3.0
Product Version :
Flex 3
Runtime Versions :
Flash Player 9, AIR 1.1
A flag that determines if an object has been through all three phases
of layout validation (provided that any were required)
This flag should only be modified by the LayoutManager.
Implementation public function get initialized():Boolean public function set initialized(value:Boolean):void
nestLevel
property
nestLevel:int
Language Version :
ActionScript 3.0
Product Version :
Flex 3
Runtime Versions :
Flash Player 9, AIR 1.1
The top-level SystemManager has a nestLevel of 1.
Its immediate children (the top-level Application and any pop-up
windows) have a nestLevel of 2.
Their children have a nestLevel of 3, and so on.
The nestLevel is used to sort ILayoutManagerClients
during the measurement and layout phases.
During the commit phase, the LayoutManager commits properties on clients
in order of increasing nestLevel, so that an object's
children have already had their properties committed before Flex
commits properties on the object itself.
During the measurement phase, the LayoutManager measures clients
in order of decreasing nestLevel, so that an object's
children have already been measured before Flex measures
the object itself.
During the layout phase, the LayoutManager lays out clients
in order of increasing nestLevel, so that an object
has a chance to set the sizes of its children before the child
objects are asked to position and size their children.
Implementation public function get nestLevel():int public function set nestLevel(value:int):void
processedDescriptors
property
processedDescriptors:Boolean
Language Version :
ActionScript 3.0
Product Version :
Flex 3
Runtime Versions :
Flash Player 9, AIR 1.1
Set to true after immediate or deferred child creation,
depending on which one happens. For a Container object, it is set
to true at the end of
the createComponentsFromDescriptors() method,
meaning after the Container object creates its children from its child descriptors.
For example, if an Accordion container uses deferred instantiation,
the processedDescriptors property for the second pane of
the Accordion container does not become true until after
the user navigates to that pane and the pane creates its children.
But, if the Accordion had set the creationPolicy property
to "all", the processedDescriptors property
for its second pane is set to true during application startup.
For classes that are not containers, which do not have descriptors,
it is set to true after the createChildren()
method creates any internal component children.
Implementation public function get processedDescriptors():Boolean public function set processedDescriptors(value:Boolean):void
updateCompletePendingFlag
property
updateCompletePendingFlag:Boolean
Language Version :
ActionScript 3.0
Product Version :
Flex 3
Runtime Versions :
Flash Player 9, AIR 1.1
A flag that determines if an object is waiting to have its
updateComplete event dispatched.
This flag should only be modified by the LayoutManager.
Implementation public function get updateCompletePendingFlag():Boolean public function set updateCompletePendingFlag(value:Boolean):void
Method Detail
validateDisplayList
()
method
public function validateDisplayList():void
Language Version :
ActionScript 3.0
Product Version :
Flex 3
Runtime Versions :
Flash Player 9, AIR 1.1
Validates the position and size of children and draws other
visuals.
If the LayoutManager.invalidateDisplayList() method is called with
this ILayoutManagerClient, then the validateDisplayList() method
is called when it's time to update the display list.
validateProperties
()
method
public function validateProperties():void
Language Version :
ActionScript 3.0
Product Version :
Flex 3
Runtime Versions :
Flash Player 9, AIR 1.1
Validates the properties of a component.
If the LayoutManager.invalidateProperties() method is called with
this ILayoutManagerClient, then the validateProperties() method
is called when it's time to commit property values.
validateSize
()
method
public function validateSize(recursive:Boolean = false):void
Language Version :
ActionScript 3.0
Product Version :
Flex 3
Runtime Versions :
Flash Player 9, AIR 1.1
Validates the measured size of the component
If the LayoutManager.invalidateSize() method is called with
this ILayoutManagerClient, then the validateSize() method
is called when it's time to do measurements.
Parameters
recursive:Boolean (default = false) — If true, call this method
on the objects children.
