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The measure() method typically sets the measuredWidth and
measuredHeight based on how much room a component needs to display its information.
For example, a Button computes its measured size to be just large enough to display
its label String. An HBox computes its measured size to be just large enough to
display all of its children. Etc.
In addition to the measuredWidth and the explicitWidth, there is
also a percentWidth. These are conceptually the three "inputs" that
determine the actual width as the output of the layout process. The actual width
is not known until the component has undergone a LayoutManager pass.
For historical reasons related to ease-of-use consideration, the
"width" property does double duty. As a setter, it sets the
explicitWidth. As a getter, it returns the actual width.
Gordon Smith
Adobe Flex SDK Team
From:
flexcoders@yahoogroups.com [mailto:flexcoders@yahoogroups.com] On Behalf Of gwangdesign
Sent: Wednesday, March 25, 2009 8:44 AM
To: flexcoders@yahoogroups.com
Subject: [flexcoders] [101] measured width vs. explicit width vs. width
Hi,
This is a really basic question about UIComponent. My understanding is that:
1. "measuredWidth" is the default or suggested or
"appropriate" width that a (subclassing) UIComponent asks for itself;
2. "explicit width" is the value you set explicitly to the
"width" property of the component;
3. "width" is the real or final width as the component gets drawn to
the screen *after* the displaylist gets updated. This value is either the
"explicit width" as the developer sets it, or something that the
container ("parent") components finally determine based on the
"measuredWidth" the component asked for and other factors such as the
real estate available for it.
Is this something close to the truth/rules?
Please advice and/or correct. Thanks.
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