Macromedia flex 2 Manuale

86

Creating Simple MXML Components

Alternatively, you can define these styles by using a class selector style declaration, as the 
following example shows:

<?xml version="1.0"?>
<!-- mxml/myComponents/StateComboBoxWithStyleClassSel.mxml -->

<mx:ComboBox xmlns:mx="http://www.adobe.com/2006/mxml" 
styleName="myCBStyle">

    <mx:Style>
        .myCBStyle {
            openDuration : 1000;
            fontSize : 15;
            }
    </mx:Style>

    <mx:dataProvider>   
        <mx:Array>
            <mx:String>AK</mx:String>
            <mx:String>AL</mx:String>
        </mx:Array>
    </mx:dataProvider>
</mx:ComboBox>

Application developers can apply additional styles to the component. For example, if your 
component defines styles for the open duration and font size, application developers can still 
specify font color or other styles. The following example uses 
StateComboBoxWithStyleProps.mxml in an application and specifies the font color style for 
the control:

<?xml version="1.0"?>
<!-- mxml/MainStyleWithPropsAddColor.mxml -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" 
    xmlns:MyComp="myComponents.*">

    <MyComp:StateComboBoxWithStyleProps color="red"/>
    
</mx:Application>

Applying styles from the referencing file

When you reference an MXML component, the referencing file can specify style definitions 
to the MXML component by using the following mechanisms:

■

Tag properties

NO

TE

You cannot define a type selector in an MXML component. If you define a type selector, 
a compiler error occurs.