ActionScript 3.0 :: Overhead Of "unlistened" Events?
Dec 17, 2009
I'm wanting to override most properties (at least the display ones such as x, y, z, scale,alpha etc) of a class. Whenever one of those values changes, they will dispatch a custom event.Especially with hundreds of items at once, this is likely to affect performance,especially on items that are constantly moving.Will Events that are never listened to affect the performance anything? Is it mainly all the different listener functions that are what slow down?Would this make any difference performance wise? (Mainly referring to the "hasEventListener" check)
Code:
public override function set x(new_x:Number)
{
[code]......
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Dec 17, 2009
Suppose I have a ViewStack like this:
<mx:ViewStack id="s" left="5" right="5" bottom="5" top="0" width="100%" height="100%" creationPolicy="all" minHeight="0">
<mx:Repeater id="repeater" dataProvider="{dp}" height="100%" width="100%" minHeight="0">
<mx:Box id="bx" label="{repeater.currentItem.label}" width="100%" height="100%" minHeight="0">
<mx:Label minHeight="0" width="100%" height="100%" label="bob" />
</mx:Box></mx:Repeater></mx:ViewStack>
With a large number of items in the stack (each having a large number of panels, databinding, etc), this gets extremely slow. The Repeater seems to trigger creation of all children regardless of the creationPolicy of the viewStack itself.
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Jun 30, 2011
So I have streaming video coming in, and I want to know when it is buffering. This is fundamentally not that hard, just adding an EventListener for some type of buffering event, but I was wondering if this is necessarily the "best" way to do it.
My other thought was setting up a timer that polls the video feed every X milliseconds asking it if the video isBuffering(), or somesuch. While I could, in the worst case, wait the full X milliseconds before querying the video stream, I've decided that this doesn't actually matter to me; I can work around it, and indeed do so quite naturally already.
So I'm asking: is there substantial overhead involved in having an EventListener (assuming I already have quite a few), or is the advantage of catching the buffering event right away sufficiently appealing?
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May 18, 2011
Im attempting to make an overhead shooter game. Ive got the basic movement down already, and rotation towards mouse. For when he shoots, ive set it to duplicate a bullet movie clip, but i only understand how to set it towards one graphical direction(ex: x +, y -)
The code i know ive gotta fix is
onClipEvent (enterFrame) {
this._x += laserMoveSpeed;
if (this._x>1000) {
this.removeMovieClip();
}
}
The little x + part has to be fixed, but i have no idea what to substitute in order to make it shoot from the front.
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May 17, 2010
I am trying to make a racing game with an overhead view looking down. There will be a separate mc for the ground and another separate mc for the players car. How can I do this? O ya and just in case i am thinking the way I did: I tried to "rotate" the ground but when the car moves down the ground it moves away from the registration point, so therefore it rotates non relative to the car i want to make this game in as3.
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Feb 18, 2009
I would like to ask if there are any articles that explains the overhead added to a flash program when using the Math functions in AS2.0?
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Oct 29, 2009
I've been developing Flash applications for several years, and here's something I've always wondered about.
I try to be as careful as possible about minimizing the amount of "overhead" that my application uses. (By overhead, I generally mean RAM, cpu processing effort, downloaded data, etc.) My goal is to consume as little of the user's PC resources as possible.
[Code]...
I circumstances matter - a few KB of "page weight" on Amazon.com or Twitter.com matter a lot more than on a site that gets a few hundred visitors a month. But in general, are there good tools to measure this type of thing?
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Jan 11, 2012
Just wanted to ask if there is any advantage for either using mouse click event or touch tap events, when writing apps for mobiles or tablets (for the iphone especially)?
I know that both of them should work fine, but in term of performance, is anyone better? Are there any things I should be aware of when choosing either?
By the way am using actionscript3 to implement the app.
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Sep 30, 2009
I have an animation that I want to start when clicking on the flash window. However, I've also have some buttons on the stage. If I add an event listener for MouseEvent.CLICK on the stage, then it 'eats up' the events and the buttons don't work.
I've tried some tricks, by adding some invisible buttons on top of the real ones, and use the MOUSE_OVER event to selectively enable/disable the mouseEnabled flag for the stage, but didn't work because it complains that the property or method doesn't exist (which I find odd).
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Feb 24, 2011
I have noticed that using the "addEventListener" and coming back into a frame, I get multiple events tied to the same component.The design I am using jumps to an "I" frame (intermediate) and then back to the "M" frame (main) when the user performs an action.I add event listeners to several components when I enter that M frame. What I notice is that the events seem to stack up for a particular component.
For instance, if I enter M frame, N number of times and addEventListener("click", handleEvent) to a radio button, I get N calls to handleEvent when the user clicks on the radio button. I guess this kinda makes sense but is not what I want. I just want one event of a particular type (in this case "click") to be associated with the a particular component. I get around this issue by removing the event(s) in the I frame. Then they get reinstalled in the M frame. Only one at a time.
So, just wondering about this behaviour. Is there a way to check for the number of events that are currently active on a particular component? Better way to handle adding events?
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Dec 26, 2011
I am designing a music player using JavaScript (jQuery) and HTML5, with Flash AS3 to fall back. Basically what I want to do is to be able to click HTML control elements and have them interact with the flash in order to play/pause and skip tracks in the playlist (playlist JSON file read by JavaScript, passes file ID to AS3, AS3 reads another JSON file to get URL, then plays audio)
This enables me to only use the Flash to play the audio, thus creating the same user experience regardless of HTML5 browser support. I'm assuming I will have to 'listen' for events in AS3, however any pointers in how to engage these events in JS and react to the events in AS3
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Aug 25, 2010
LinkeSetFx has its own CollectionEvent, but I don't know how to map the LinkedSetFx event to mx.events.collectionEvent(I want use it in ComboBox). LinkedSetFx is in AS3Commons-collection framework.Here is the url, choose the as3commons-collections-1.0.0.zip, you'll find LinkedSetFx in srcorgas3commonscollectionsfx
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Mar 27, 2012
iam making a game and i almost finish except one error i couln.t get it
TypeError: Error #1034: Type Coercion failed: cannot convert flash.events::Event@3738fb79 to flash.events.MouseEvent.
TypeError: Error #1034: Type Coercion failed: cannot convert flash.events::Event@3738fb79 to flash.events.MouseEvent.
[code]....
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Jul 1, 2011
I try to dispatch an error event in an AS3 application:dispatchEvent( new ErrorEvent( ErrorEvent.ERROR, false, false, "my error message"));but I get the following runtime error:
TypeError: Error #1034: Type Coercion failed: cannot convert flash.events::ErrorEvent@2c04239 to com.adobe.protocols.dict.events.ErrorEvent.at flash.events::EventDispatcher/dispatchEventFunction()at flash.events::EventDispatcher/dispatchEvent()at my line of code..
[Code]...
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Dec 18, 2011
When I placed this AddEventListener I got this "Type Coercion failed message"
addEventListener(Event.ENTER_FRAME,onEnterFrm);
Located above the mouse event:
addEventListener(Event.ENTER_FRAME,onEnterFrm);
[code]....
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Feb 12, 2012
Right now all the sounds (78 of them) on my guitar play using the roll_over event but that doesn't give the user much control over what sound is played.
The actionscript im using to play my sounds is this;
for(var i:uint = 0; i < buttonArray.length; i++){
buttonArray[i].addEventListener(MouseEvent.ROLL_OVER, buttonRolledOver);
}
[Code]....
What i want to do is only play a sound with the roll_over event when the left click is held down.
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Jun 8, 2009
So here's what I want to do: I have a button, and I'm adding an Event Listener to that button to call a function. Now I want the event to be triggers when someone mouses out of the button AND someone is mousing out in the direction up.
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So I need to make it so that both of these end up true in order for function callLink to be called. Is that possible, and if so, what would the syntax be?
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Mar 23, 2010
If I have three classes, A, B and C. C is instantiated in B and B is instantiated in A, what's the best way to get events from C into A?In my current test case I've added an event listener to the instance of B for an event that occurs in C but I cannot receive the event, if I add the event listener to the instance of C in B it works fine. Do I need to dispatch an event in my event listener in B to notify A of the event in C? Or is there a better way to do this?
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Jan 4, 2011
Im having some trouble catching events dispatched from externally loaded swf.Error #1034: Type Coercion failed: cannot convert LifelineEvent@2cb75979 to LifelineEvent.If an externally loaded swf has been placed on the stage as a child of a display object, doesnt it become part of the main timeline as any other display object
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Sep 30, 2009
I'm trying to write a simple counter. UP or Space increments a number and DOWN decrements. It's just one big number in the middle of the screen. A bell rings on an increment and I have added code to go full screen on mouse click.[code]...
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Jul 30, 2009
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Feb 11, 2011
I used to play around with flash during the early days of action script 1.but now i can't seem to find my way around it. Used to be able to add the script to the button itself.[code]what I want to do is to have a toggle button show and hidethe objects on the movie.
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Feb 10, 2012
For some while I am researching on dispatching Events on AS2 which can bubble as it happens in AS3. This is not the first time in this world and I hope you all know how to do it in AS2. My issue is not on addEventListener but the removeEventListener which is not removing that particular event from that object.Cause the handler argument in the mx.events.EventDispatcher is throwing undefined where that should be [type Function]. At the time of registering on addEventListener it is registering the handler as [type Function], but it throw undefined on removeEventListener method.
[Code]...
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Jun 16, 2009
How do I capture events of an obj behind another?I have a button(btn1) which I am applying a tween to. This tween is responsible for fading the btn out using the alpha prop (to 0). Behind that btn is another (btn2). I am having trouble leaving btn1 in place (same x and y) and being able to press on btn2. I have removed the eventHandler for btn1 but it's still blocking the other button. Other than creating another var and checking in the tween on complete handler is there any way to leave btn1 in place but be able to click through it??
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Aug 28, 2009
My FLA has a class instantiated in it and I can call the public functions in that class no problem. What does not seem to work, is to dispatch an event in the FLA and the class to register it. Is that how it is? Seems that from inside the class outward is no problem. So, from child to parent, works, but not the other way around. The event that I am dispatching on the FLA timeline looks like this:
dispatchEvent(new Event("SHOW_TIP"));
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May 11, 2010
I set up a simple Flash banner with the following code to click through to a web page:
function buttonClickHandler(event:MouseEvent):void { navigateToURL(new URLRequest("**URL**")); trace("You clicked me."); }
This worked fine, no problems.However, I was then asked to include a click counter by using this code:
btn.buttonMode = true; btn.addEventListener(MouseEvent.CLICK, goOut); function goOut(e:Event){ var url:String = root.loaderInfo.parameters.clickTag; var request:URLRequest = new URLRequest(**URL**); try { navigateToURL(request); } catch (e:Error) { } }
I've tried various ways to combine the two events, but it just doesn't seem to work. I'm only used to one simple action at a time.
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Nov 17, 2010
in 3.0 stage have 10 MovieClips how can i add events in for loop? in 2.0 i have used eval like
for(var i=0;i<10;i++){
var mc=eval("clip"+i)
mc.onRelease=function (){
}
}
in 3.0 how can add events in loop
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Jan 2, 2011
I'm successfully using MouseEvent.MOUSE_OVER, but I need to know which one to use for when the end-user mouse away from the button. I've tried MOUSE_UP and MOUSE_OUT, but neither worked. Where can we find info resources that explain each one in details?
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May 29, 2008
how to make the custom class to pass the information.
My question is this: Why did Adobe not create such an event in the default API? What downside is there to using this method as the main way to pass information between MVC style components? Since they made special events for everything else, and its such a common practice, surely there must be some reason why it wasn't done.
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Feb 10, 2010
I've been working with AS3. The crux of the problem is that before I run a function I need to know that certain conditions have been met, for example loading my config.xml and putting it into a class variable. Where I run into trouble is that URLLoader is async so I can't put code after the load, the only thing I can do is put it in a lambda on the listener.
var conf:Object = new Object();
var ldr:URLLoader = new URLLoader();
ldr.addEventListener(Event.COMPLETE, geoLoader, false, 0, true);
ldr.load(new URLRequest("[URL]"));
function geoLoader (e:Event):void {
[Code] .....
This worked great for short bits of code, but I've got a bunch of functions that are relying on huge amounts of preconditions (this pollutes the namespace if I use the first method) or functions that rely on one bit of the stack (which means that I can't use the second method even though it's slightly more obvious to me). So, my question is: How do flash professionals handle preconditions? I'm trying to find a solution that allows tons of preconditions as well as a solution that allows different orders of preconditions or just a few preconditions from a group.
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