MACROMEDIA FLEX 2-MIGRATING APPLICATIONS TO FLEX 2 Uživatelský manuál stáhnout pdf (Strana 50)

50 Flex Classes

The alpha, scaleX, and scaleY properties

The alpha, scaleX, and scaleY properties now range from 0 to 1 instead of from 0 to 100.

For example, to make a UIObject 50% opaque, specify

alpha=0.5 instead of alpha=50. To

stretch the object horizontally by a factor of two, specify

scaleX=2 instead of scaleX=200.

The default value for the

focusAlpha property is now 0.3.

The width and height properties

The width and height properties are now typed as Number. In Flex 1.5, you could set the

width and height to a Number (such as 50) or a String (such as "50%"). Because the type is

now only a Number, you can no longer use the following syntax in your ActionScript:

myUIObject.width = "50%";

To set widths and heights using percentage values, you must now use the following syntax:

myUIObject.percentWidth = 50;

However, in MXML, you can express the width property as a pixel or percentage value. For

example, the following two lines of code are valid:

The addEventHandler() method

The addEventHandler() method has been removed from UIObject. This method is now

inherited from the flash.events.EventDispatcher class.

NOTE

This change formerly applied to the UIObject class, but because UIObject and

UIComponent have been combined into a single base class, the change now applies to

the UIComponent class.

NOTE

This change formerly applied to the UIObject class, but because UIObject and

UIComponent have been combined into a single base class, the change now applies to

the UIComponent class.

NOTE

This change formerly applied to the UIObject class, but because UIObject and

UIComponent have been combined into a single base class, the change now applies to

the UIComponent class.

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MACROMEDIA FLEX 2-MIGRATING APPLICATIONS TO FLEX 2 Uživatelský manuál Strana 50