Hello everyone.
First post. I’ve researched this topic pretty detailed for 2 days now. I’ve come up with the conclusion that this is the best way to go.
Loader(), we use it get external images/swfs. To access its properties (after it’s been loaded), we use event listeners. These event listeners call a function that perform tasks on our newly loaded content, but what happens if these instructions need to be dynamic, this means passing your own extra parameters / arguments / variables from the scope of where you add the listener to the actual listener function.
Code is posted below… Essentially I had an addGraphic Method that would add a graphic at a certain x, y coordinate and at a certain width/height. I tried to set a temporary variable in the class but the listeners were too slow, and if i had an addGraphic call, all the objects in the listener function would use the LAST addGraphic’s calls details.
I thought that using a Custom Event would be best. Very clean and orderly, and maybe this is where I could use some help, how do you override the Loader() 's dispatch of the Event.INIT to instead dispatch your custom event that allows for parameters so that it would be event.var1 event.var2 (where var1 and var2 are get methods setup in your custom event)?! **OR **maybe another way so your listener could be loaderObj.addEventListener(CustomEvent.INIT, listenerFunc, param1, param2) ?? Either solution (custom event or custom listener) would be great. I like to follow standard code and keep things clean.
Anyways if anybody could answer that, that would be great, for those of you that need a solution, this is what I’ve come up with. It’s basically a version of the “Anonymous function” but by assigning it a value before hand you can basically remove the Listener (which is a big deal in some situations).
Thanks for any help, and maybe my solution can be some guidance to those that struggle with this.
public function addGraphic(graphicString:String, graphicPath:String, x_pos:int, y_pos:int, useWidth:int, useHeight:int){
var picHolderMC = new MovieClip();
stageRef.addChild(picHolderMC);
var loadGraphic = new Loader();
loadGraphic.load(new URLRequest(graphicPath));
var picLoadSetup = new Array();
picLoadSetup["xPos"] = x_pos;
picLoadSetup["yPos"] = y_pos;
picLoadSetup["picWidth"] = useWidth;
picLoadSetup["picHeight"] = useHeight;
picLoadSetup["useMC"] = picHolderMC;
/*
hack: Intermediate EventListener to pass the event and extra parameters.
although everything could be handled here, it is cleaner to see the
instructions for what is to happen when the graphic is finished being loaded.
*/
var graphicEventPasser = function(e:Event){
graphicLoaded(e, picLoadSetup);
}
loadGraphic.contentLoaderInfo.addEventListener(Event.INIT, graphicEventPasser, false);
}
public function graphicLoaded(e:Event, picLoadSetup){
var x_pos = picLoadSetup["xPos"];
var y_pos = picLoadSetup["yPos"];
var useWidth = picLoadSetup["picWidth"];
var useHeight = picLoadSetup["picHeight"];
var useMC = picLoadSetup["useMC"];
var loadedPicture = e.target.content;
useMC.addChild(loadedPicture);
loadedPicture.x = x_pos;
loadedPicture.y = y_pos;
loadedPicture.width = useWidth;
loadedPicture.height = useHeight;
}