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Layout manager in flex
1 Answer(s)      4 years and 5 months ago
Posted in : Flex


What is Layout Manager and explain the Properties and Methods?
Now let's know how we will use these properties and methods........


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October 19, 2010 at 4:53 PM



The LayoutManager is the engine behind Flex's measurement and layout strategy. Layout is performed in three phases; commit, measurement, and layout. The commit phase begins with a call to alidateProperties(), which walks through a list (sorted by nesting level) of objects calling each object's validateProperties()method.

The objects in the list are processed by nesting order, with the most deeply nested object accessed first. This can also be referred to as bottom-up inside-out ordering.

The measurement phase begins with a call to validateSize(), which walks through a list (sorted by nesting level) of objects calling each object's validateSize() method to determine if the object has changed in size.

The layout phase begins with a call to the validateDisplayList() method, which walks through a list (reverse sorted by nesting level) of objects calling each object's validateDisplayList() method to request the object to size and position all components contained within it (i.e. its children).

Property of LayoutManagerusePhasedInstantiation : Boolean A flag that indicates whether the LayoutManager allows screen updates between phases.

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