At this point, we’ll finally make good use of the id value of our Flash <object> (and, again, that’s not the id attribute of its placeholder element). We will call Actionscript functions from our *.js file using very basic Document Object Model scripting :
If we’ve used verbatim the code from the preparation section (STEP 1 of 3), our id will have the following value — given that we’ve used either the UFO library, the SWFObject library, or just plain XHTML markup :
Open your *.fla file in Flash 8. Find the layer and frame where you put your ActionScript code. Type in this line :
If you need to call me because you want me to do this very precise thing, dial that number. You may call me at any time. I am sitting by the phone, not exactly waiting for your call (I have movies to play), but I am ready to pick up. And oh, I have this other number if you need me for this other thing...
In the previous section of this article, we invoked the method call whenever we needed to say something to the browser. With addCallback, we leave our number once. However, we leave as many different numbers as there are tasks we’re ready to perform.
|Method||Description||How to use the method (blueprint)|
The “public” keyword means that the call and addCallback methods are exposed to the outside world, and not only used internally in the class definition. The keyword “static” means that we call the methods on the class itself, using the dot syntax : ExternalInterface.method(). We need not create any instance of the ExternalInterface class.
The Flash player, who has that phone registered in its phone book (for the Flash movie with unique id flashMovieId) invokes the corresponding ActionScript function myFunction.
Here is some basic markup for the form :
The form is very basic. We should style it using CSS.
In our *.js file, we register our event-handler function on the form’s onsubmit property once the web page is loaded :
There are two things we need to do for each task that Flash is ready to accomplish “on call” : give out a card with a phone number, and set up a function to accomplish the corresponding task.
On the layer and in the frame where we put our ActionScript code, we type this :
|JScallsAS.zip||6.73 KB||23||7 years 44 weeks ago|