User Guide

Table Of Contents

Writing the component’s ActionScript code 63

The following example identifies the myClickEvent event as an event that the component

can dispatch:

[Event("myClickEvent")]

If you do not identify an event in the class file with the Event metadata keyword, the compiler

ignores the event during compilation, and Flex ignores this event triggered by the component

during runtime. The metadata for events is inherited from the parent class, however, so you do

not need to tag events that are already tagged with the

Event metadata keyword in the parent

class.

The following example shows the

Event metadata for the UIObject class, which handles the

resize, move, and draw events:

...

[Event("resize")]

[Event("move")]

[Event("draw")]

class mx.core.UIObject extends MovieClip {

...

}

Inspectable

You specify the user-editable (or inspectable) parameters of a component in the class definition for

the component using the

Inspectable metadata keyword. If you tag a property as inspectable, it

appears in the Component inspector of the Flash user interface.

Prior to the availability of this metadata keyword, you had to define the property in the

ActionScript class file and in the Component inspector, which introduced the possibility of errors

because the property was defined in multiple locations. Now, you define the property only once.

The

Inspectable metadata statement must immediately precede the property’s variable

declaration to be bound to that property.

The

Inspectable metadata keyword has the following syntax:

[Inspectable(value_type=value[,option=value,...])]

property_declaration name:type;

The following table describes the options of the Inspectable metadata keyword:

Option Type Description