ActionScript 3.0 Design Patterns.pdf - VideoTutorials-bg.com

Example 12-15. Controller.as (Controller for the weather map example)
package
{
public class Controller implements ICompInputHandler
{
}
}
The Views
private var model:Object;
public function Controller(aModel:IModel)
{
this.model = aModel;
}
public function compChangeHandler(index:uint):void {
(model as IModel).setRegion(index); // update model
}
The weather map application consists of two views. The first is a user interface element
that contains a combo boxto select a region to display. The second view displays
the corresponding regional satellite image.
We will use the built-in ComboBox and UILoader components in Flash CS3 to implement
the user interface elements in each view. Components are movie clips with
parameters that allow you to modify their appearance and behavior. They allow
developers to build Flash applications with consistent behavior and appearance without
creating custom user interface elements such as buttons and sliders. For the
weather map application, we need to drag the ComboBox and UILoader components
from the Components panel to the Library panel in our Flash document. The Components
and Library panels can be accessed from the Windows menu in Flash CS3.
Note that we don’t want to place the component on the stage. We’ll add the components
to the stage at runtime using ActionScript. The ComboBox component uses several
additional assets as well. Your library panel will look like Figure 12-4 after the
ComboBox and UILoader components are dragged into it.
We can now develop the combo boxand map views for the application. The combo
box view will be a composite view containing the map view as one of its children.
Example: Weather Maps | 447