Code Samples

All of the classes in the Transform SWF framework which accepts actions, FSDoAction, FSDefineButton, etc. have methods that allow the compiled scripts to be easily added to a movie.

String script = "a = b + c;"
int swfVersion = 5;
	 
ASParser parser = new ASParser();
ASNode root = parser.parse(script);
byte[] compiledScript = root.encode(swfVersion);

FSDoAction frameActions = new FSDoAction(compiledScript);
 
movie.add(frameActions);

Compiling scripts stored in files is easily performed using the ActionScript directive #include. For example the file, script.as, contains the following ActionScript statements.

onClipEvent(mouseDown)
{
    startDrag();
}
onClipEvent(mouseUp)
{
    stopDrag();
}

#include directives may nested to any depth allowing libraries of scripts to be created.

String script = "#include script.as";

ASParser parser = new ASParser();
ASNode root = parser.parse(script);
byte[] compiledScript = root.encode(swfVersion);

Scripts can also be created by building trees of ASNodes, providing an alternative to dynamically generating scripts compared to processing strings.

ASNode a = new ASNode(ASNode.Identifier, "a");
ASNode b = new ASNode(ASNode.Identifier, "b");
ASNode c = new ASNode(ASNode.Identifier, "c");
 
ASNode add = new ASNode(ASNode.Add, a, b);
ASNode assign = new ASNode(a, add);

All of these examples are trivial to illustrate how the parser is used to compile scripts and add them to a movie. ActionScript is a fully featured programming language supporting classes and inheritance so extremely complex behaviours can be created for movies - allowing full featured applications to be created using Flash.