MACROMEDIA FLASH COMMUNICATION SERVER MX-SERVER-SIDE COMMUNICATION ACTIONSCRIPT DICTIONARY Specifiche Scaricare il pdf (Pagina 114)

Chapter 3 36

2 Open a connection to the server.

// Open connection to server

client_nc = new NetConnection();

client_nc.connect("rtmp:/doc_text/room_01");

Handle the messages coming from the server.

// Handle status message

client_nc.onStatus = function(info) {

trace("Level: " + info.level + " Code: " + info.code);

}

Initialize the typing stage.

TypingStage.text = "";

Get a remote shared object to hold the text data from the client.

// Create a remote shared object. client_nc.uri is the URI of the

// NetConnection the shared object will use to connect to the

// server.

text_so = SharedObject.getRemote("sharedtext", client_nc.uri, false);

When you get a shared object, make sure you connect to it.

// The following is very important, nothing happens otherwise

text_so.connect(client_nc);

Create an onSync callback function to handle the text message.

// Each time something changes in the shared object, the server

// sends out a synchronization message. This onSync handler

// updates the movie based on the information.

text_so.onSync = function(list) {

// Update the text area in the typing stage with the latest

// text from the shared object. The ’for’ loop condition searches

// through the list of changes, and the ’if’ condition ensures

// that we apply the relevant change only if someone other than

// this client has changed the value.

for (var i = 0; i < list.length; i++)

if (list[i].name == "textValue" && list[i].code != "success")

{

TypingStage.text = text_so.data.textValue;

break;

}

};

When the text in the typing stage changes, update the shared object with the new text.

// Update the shared object every time the user types in new text

TypingStage.onChanged = function()

{

text_so.data.textValue = TypingStage.text;

};

To test your sample application:

1 In the Flash MX authoring environment, after you have saved your work, publish it by

selecting File > Publish.

2 Open two instances of the SWF file in the application directory.

3 Type in one text box to see the other immediately updated.

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