MACROMEDIA FLEX 2-MIGRATING APPLICATIONS TO FLEX 2 Manuel d'utilisateur télécharger pdf (Page 123)

Using styles 123

For example:

<mx:Style>

// The following class selector fails in Flex 2 if

// there is no associated class:

myClass {

color: red;

}

// The following class selector works fine in Flex 2:

.myOtherClass {

color: red;

}

</mx:Style>

You must include the period when you use the getStyleDeclaration() method.

Global style sheet

The global style sheet, global.css, was removed. Flex now uses a default style sheet,

defaults.css, which is in the frameworks.swc file.

If you are migrating an existing 1.5 application that depended on the global.css file, you can

still use global.css, but you must compile it into a theme (importing global.css is no longer

automatic). For more information on compiling themes, see Chapter 18, “Using Styles and

Themes,” in the Flex 2 Developer’s Guide.

Using type selectors

Properties set in type selectors now obey object-oriented inheritence rules. If you define a type

selector for a class, Flex applies all properties in that type selector to that class, as well as

subclasses of that class. For example, VBox is a subclass of Box, which is a subclass of

Container.

If you define the following type selectors, VBox controls inherit the values of the

fontSize

and

fontStyle properties.

<mx:Style>

Container { fontSize:14 }

Box { fontStyle: bold }

VBox { color:red }

</mx:Style>

Previously, properties set in type selectors that were parents of a class did not apply to that

class, unless that class was a child object in the application’s display list.

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MACROMEDIA FLEX 2-MIGRATING APPLICATIONS TO FLEX 2 Manuel d'utilisateur Page 123