Language Version: | ActionScript 3.0 |
Runtime Versions: | Flash Player 9, AIR 1.1 |
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.
initialized:Boolean
Language Version: | ActionScript 3.0 |
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:int
Language Version: | ActionScript 3.0 |
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:Boolean
Language Version: | ActionScript 3.0 |
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:Boolean
Language Version: | ActionScript 3.0 |
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
public function validateDisplayList():void
Language Version: | ActionScript 3.0 |
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.
public function validateProperties():void
Language Version: | ActionScript 3.0 |
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.
public function validateSize(recursive:Boolean = false):void
Language Version: | ActionScript 3.0 |
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.
|