User Guide

Example: Creating style properties 189
Defining a style property
You define a style property for a component in the class definition.
To define a new style property:
1. Insert the [Style] metadata tag that defines the style before the class definition.
You insert the
[Style] metadata tag before the class definition to define the MXML tag
attribute for a style property. If you omit the
[Style] metadata tag, the MXML compiler
issues a syntax error when you try to set the property as an MXML tag attribute.
The
[Style] metadata tag has the following syntax:
[Style(name="style_name"[,property="value",...])]
For more information, see Chapter 5, “Using Metadata Tags in Custom Components,” on
page 45.
2. Override the styleChanged() method to detect changes to the property.
3. Override updateDisplayList() method to incorporate the style into the component
display.
4. Define a static initializer to set the default value of the style property.
For more information, see “Setting default style values” on page 192.