MACROMEDIA FLASH 8-LEARNING ACTIONSCRIPT 2.0 IN FLASH Manual page 587

Adding and binding components on the Stage
One of the biggest advantages to using the binding classes with ActionScript is that you can
create bindings between components that Flash has added to the Stage at runtime. Imagine
creating your own custom class that adds the appropriate text fields to the Stage at runtime,
and then validates the necessary data and adds the necessary bindings. As long as you have the
components in your library, you can add them dynamically and use a couple of extra lines of
code to create bindings.
To add and then bind components on the Stage by using ActionScript:
1. Create a new Flash document.
2. Drag a ComboBox and a Label component into the document's library.
3. Insert a new layer and name it actions.
4. Add the following code to Frame 1 of the actions layer:
import mx.data.binding.*;
this.createClassObject(mx.controls.ComboBox, "my_cb", 1, {_x:10,
_y:10});
this.createClassObject(mx.controls.Label, "my_lbl", 2, {_x:10, _y:40});
my_cb.addItem("JAN", 0);
my_cb.addItem("FEB", 1);
my_cb.addItem("MAR", 2);
my_cb.addItem("APR", 3);
my_cb.addItem("MAY", 4);
my_cb.addItem("JUN", 5);
var src:EndPoint = new EndPoint();
src.component = my_cb;
src.property = "value";
src.event = "change";
var dest:EndPoint = new EndPoint();
dest.component = my_lbl;
dest.property = "text";
new Binding(src, dest);
The first line of ActionScript imports the classes from the
that you don't need to use fully qualified paths in your code. The next two lines of
ActionScript attach the components from the document's library to the Stage. Next you
position the components on the Stage.
Finally you add data to the ComboBox instance and create the binding between the
ComboBox and
my_lbl
Label component on the Stage.
Creating runtime data bindings using ActionScript
package so
mx.data.binding
my_cb
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