MACROMEDIA FLASH COMMUNICATION SERVER MX-SERVER-SIDE COMMUNICATION ACTIONSCRIPT DICTIONARY Spécifications télécharger pdf (Page 120)

Chapter 3 42

About the sample

In a chat room, you want to view current users dynamically. When users log in to a room, the list

should be updated; when users log off, they should be removed from the list. It’s best to do this

processing work on the server, because keeping data centrally on the server means that any client

can come and go, and the data will always be accurate and available.

In addition, in this example, the server doesn’t simply hand off the text from one client to

another, it actually makes changes to the message by adding the name of the user who typed it.

Because you expect the server to provide this functionality, you need to write some server-side

ActionScript to handle this work.

Finally, this example also illustrates how to dynamically add an instance name to a

NetConnection.connect command based on data entered by the user.

Re-creating the sample

The doc_textchat.fla file provides the ActionScript for letting multiple users share text in

real time.

See “Creating your working environment” on page 31 before you start to re-create the sample.

To create the user interface for this sample:

1 In the Flash MX authoring environment, select File > New to open a new file.

2 From the toolbox, select the Text tool and draw two text boxes. In the Property inspector

(Window > Properties), select Input Text for the type of text box, and give one the instance

name

User, and the other, Room.

3 From the toolbox, select the Text tool and draw another text box. In the Property inspector,

select Input Text for the type of text box, and give it the instance name

Message.

4 From the toolbox, select the Text tool and draw a fourth text box. In the Property inspector,

select Dynamic Text for the type of text box, and give it the instance name

History.

5 To add a place where users are listed, open the Components panel (Windows > Components),

drag the List Box component onto the Stage, and give it the instance name

People.

6 To add the button for connecting to the server, drag a push button from the Components

panel onto the Stage. In the Property inspector, give it the instance name

Connect_btn, the

label

Connect, and the click handler doConnect.

7 To add the button for sending messages, drag a push button from the Components panel onto

the Stage. In the Property inspector, give it the instance name

Send_btn, the label Send, and

the click handler

doSend.

8 Create a directory named doc_textchat in your flashcom application directory, and save the file

as doc_textchat.fla in this directory.

To write the client-side ActionScript for this sample:

1 Select the keyframe in the Timeline and open the Actions panel (Window > Actions).

2 In the Actions panel, stop the progress of the movie.

stop();

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