MACROMEDIA COLDFUSION MX 7.0.2-USING COLDFUSION MX WITH FLEX 2 Guida Utente Pagina 144

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144 Use an Event Listener
Set up your project
Before you begin this lesson, ensure that you perform the following tasks:
If you have not already done so, create the Lessons project in Adobe Flex Builder. For
more information, see “Create the Lessons project” on page 101.
Ensure that the automatic build option is enabled in Flex Builder. This option is enabled
by default in the standalone configuration of Flex Builder but not in the plug-in
configuration. To enable it, select Project > Build Automatically.
Create a simple user interface
You decide to build a simple currency converter for your online store. You want the user to be
able to specify a dollar amount and click a button to get the equivalent amount in yen. The
first step is to design a simple user interface.
1. With your Lessons project selected in the Navigator view, select File > New > MXML
Application and create an application file called Events.mxml.
2. Designate the Events.mxml file as the default file to be compiled by right-clicking
(Control-click on Macintosh) the file in the Navigator view and selecting Set As Default
Application from the context menu.
3. In the MXML editor’s Design mode, drag a Panel container into the layout from the
Layout category of the Components view, and then set the following Panel properties in
the Properties view:
Title: Currency Converter
Width: 450
Height: 150
X: 20
Y: 20
4. Add two Label controls, a TextInput control, and a Button control to the Panel container
by dragging them from the Components view (Window > Components).
NOTE
For the purpose of these lessons, several application files are used in a single Flex
Builder project. However, it’s good practice to have only one MXML application file
per project.
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