ActionScript 2.0 :: Find Out What Listeners Are Attached To An Object?
Jul 19, 2005
I have a couple of components on stage that I need to disable mouse events on. I've been looking through the documentation, and it looks like the components probably have a Mouse listener setup, and then they fire off their functions when their listeners are notified of an event. In order to remove a Mouse listener, I need to know the instance name of the listener object, is there a way of referencing this? I couldn't find it as a built-in function.
Maybe I'm off-base, and there's a better way to get a component to stop responding to mouse events. I tried
Lately I've found myself constantly writing removeEventListeners everywhere, which makes code quite messy. I know it's a best practice and such, but in general it has no sense. Garbage collector should handle such a simple task by itself, shouldn't it? Is it that hard to remove all listeners automatically when object is set to null?
So I just want to be sure if that's the case. Does setting an object to null, automatically remove all attached event listeners? In my case scenario is like this - I create an object and attach bunch of event listeners to it, then after a while I need to re-initialize this object. Of course setting this object to null is much easier then unbinding every listener by hand. And on most part listeners are anonymous functions, which means that it's not possible without code refactoring. When I simply re-initialize a variable with new I do not get duplicate listeners and such, but I'm not sure that it's previous value, along with all the listeners gets garbage-collected. Is it?
I came in to flash on ActionScript 3 and when I was starting out just over a year ago I realised how much of a bother finding keyCodes was and changing controls was just as long as had to look up the new one I wanted to use. My solution was to (eventually) write a class that handles all of my key presses and event listeners attached to that stuff. instead of using keyCodes, the functions use strings for their arguments making it easier to see what keys you want to do what. Initially the class only worked for letters and numbers but I managed to make it easily customisable and includes the arrow keys, numpad numbers, space, enter, shift and control keys.
The reason why I wrote this thread was because: I plan on making it a public class (available to anyone who wnats to use it) and b) to see if there were any specific functions that people think may be useful. So far there are the standard key-down and onRelease type functions as well as a function that only returns true once for the duration that a key is down - difference between pressing and holding.
it is possible to move an object that has a bone attached to it that will follow the movieclip you are moving with script? For example if I have movieclip "arm" connected using a bone to movieclip "hand" and I use the script
hand.x = hand.x + 20
the arm doesn't follow the hand though like it does if I were to drag the hand in flash manually.
I am trying to use the shared object to save the _x and _y positions of several attached MC's. The attached MC's have all been given a variable name and attached to a dynamically created MC called "world".I need to loop through all of the MC's in _root.world to save their postions to the shared object. Here is what I have tried,.... when I trace so.flush.. it traces to true but the object postions are not saved.......
Code: _global.initSo = function() { _global.so = SharedObject.getLocal("marinaSave"); // if the SharedObject object created a new shared object
[code]....
Am I using the for... in method correctly to loop through the MC's in _root.world and save their values?
I'm trying to create a video player in AS3 that displays the player controls when the user hovers over the video, however I'm having a hard time getting the MOUSE_OVER event to fire. I've made sure that the video's index is at the top, so that's not the issue. Is there something I'm missing? Is there any reason why this event listener wouldn't work on a video object? video.addEventListener(MouseEvent.MOUSE_OVER, doThis);
I have created a new class, that is basicly just a movieclip but with a builtin eventlistener. When I add a few instances of this class to the stage, they all have the eventlistener. But later on when i remove the intances from the stage and null the references, Will the eventlistener still exist or will it be removed by the GC ?
I load into an empty movieclip (via addChild) a library object (a movieclip of class MyObject that extends the MovieClip class). At some point, from the main I remove this custom movieclip from its parent and I set any reference to null to completely destroy it. The question: what if in the custom movieclip class there are eventListeners? Are them deleted when I destroy the object? Should I write a method to remove them before deleting the object?
I know the basics of shared objects but I never really got into it I was wondering if there is a way that I could save and load movieclips that I attach to the stage(Each has its own name such as clip_1,clip_2,etc) including the location(_x,_y,rot) and have it duplicate them all over again and move them to the same location as before (I'm using Actionscript 2, by the way)
I know the basics of shared objects but I never really got into it I was wondering if there is a way that I could save and load movieclips that I attach to the stage(Each has its own name such as clip_1,clip_2,etc) including the location(_x,_y,rot) and have it duplicate them all over again and move them to the same location as before
I have the following as code in a separate file placed in the root folder of the swf file. The as file is the class for a MovieClip in the library.When i manually place the library symbol on the stage, the MC works fine and draws the square with the nodes. However, when I try to create a copy using ' new sqMC();' code, I get an error.
I'm having trouble telling flash which Sprite to move in my script:
[code]....
TimeBlock and TimeHandle are really just classes that draw rectangles. My script (as seen here) will move the last instance of timeHandle added. If I un-comment the other new TimeHandle() section though, it will only apply it to one of them.
Ordinarily I would use event.target, but I have to use the stage as the listener for MOUSE_MOVE and MOUSE_UP. If I was doing this in PHP or even AS2 I would just pass an argument like reposition(clipname).
If you dynamically create a parent movieclip, and dynamically add a color picker to each clip, and add an event listener for each color picker, does a removeChild on the parent movieClip remove event listeners belonging to any of it's children?
I am trying to register mouse event listeners for children of my parent object (Inheritance), which works. I just need to register those for the parent and they get dissipated down the hierarchy.However, if i try it for Composition i.e. if i register the mouse event listeners on the main (parent) object, they do not act on the components of the object.So, i have to register the listeners individually on each component.how to get event registration working for composition?
So, I have 2 types of relationships in my project.
-Inheritance -Composition
I am trying to register mouse event listeners for children of my parent object (Inheritance), which works. I just need to register those for the parent and they get dissipated down the hierarchy.
However, if i try it for Composition i.e. if i register the mouse event listeners on the main (parent) object, they do not act on the components of the object. So, i have to register the listeners individually on each component.
I'm having problem with garbage collection in a large, not-so-well-written project that I didn't start. I am getting memory leaks -- and want to make sure that all event listeners on the offending objects are removed. I've gone through the code and done what I can, but still ain't happening -- is there a way in AS3 to take an object and see IF it has an event listener, and to REMOVE that listener -- that is, to remove ALL listeners, without knowing what they are? I know if I know what the EVENT TYPE is then I can use hasEventListener() to figure out if it has a listener of that type (although the presupposes I know all the event types being used), but if I don't know the function that it's subscribing to then I can't remove it.
Or is there some other way to simply nullify an object for GC? I've changed all listeners to weak -- but I think (since the offending objects are FLVPlaybacks) that something in the flash internal setup is still listening to my object (I've gleaned this from FB 4 profiler which I've used in external mode). I would just, at this point, like to see what's going on.
Q1) The registration point of a created clip is top left - my question is how can I dynamically change it's registration point - say to center center?
(I am trying to attach a movie clip to a created clip and I wanted it to be centered inside the container - a related sub-question, how can I find the x-y coordinates of the attached movie clip within the created movie clip?)
Q2)When I tried to create two different movie clips, I found I had to create them at different depths, else the first would load and the second would not. Why would that be so? I'm on MX 2004 Pro.
I want to clone an object of a class (whose source code I do not have) and copy all of the associated event handlers from the original object to the new cloned object. Does anyone know how I can do that? I know how to copy the properties from the original to the new, but can I iterate over all the event handlers and add them to the new object?
I want to make a static function that I can use in all the custom classes.It should be some kill(); function that would remove the object from the stage as well as removing its event listeners. I made it in Document class, and it didn't work. Here's the code:
ActionScript Code: public static function kill(e:DisplayObject) {[code].....
I have two components in my movie,how to write out the code for the listeners.Is it possible to write one listener that listens for changes in both components or do I have to write a separate listener for each? How would this look like written out?
I have a movieclip that contains two frames, each frame contains a different set of buttons.
it seems that i cannot add the event listeners to buttons that are not in my current viewed frame.
so.. problem one: is there a way to add event listeners to all the elements in the movieclip even if the elements are in a different frame.
problem two: after I added an event listener to some elements in current frame and then I move forward to the next frame and go back to the same frame, all the event listeners are removed and i need to initialize them again. is there a way to resolve the issue without the need to re-initialize the event listeners ?
I have been trying to find out what other objects are within an object (AS3 )and am unable to get it going.With AS2, I was abl to simply run "for in" loop to get all the information.
I have built a site in AS2 and would like to know the position of a ball so that I can move a sign to it always.The whole website is in AS2, but I think I have written an incomplete code below for AS3. I need it for AS2 because the whole site is in AS2. The get position of ball is wrong, but I just wanted to throw in some ideas eg.
Code:
// get position of ball ball_mc.addEventListener(<what goes here?>, ball_pos); function signMove(Event:MouseEvent):void{[code]..........
imagine i have a scene with hundreds of interactive objects, but they're all invisible, and i don't really know where they are. bad scenario, but work with me here.a while ago i saw a block of code that would trace() the name of every single DisplayObject within the entire scene when you rolled over it.. it was only like 3 lines of code - and it would affect all objects, even objects inside of other movieclips, etc.
I have an array of objects, I separately have a reference to one of the objects in this array (in particular, the object dispatched an event and its reference is the event target, which is what I have). How do I find this object in the array and remove it from the array?
I didn't create that Timer... so this is problably a component I have addedUnfortunately it will be difficult to remove all compenents until if find the "one" ..Yes I should have notice the CPU usage sooner !and yes I will do that if I don't find another solutionI am of course using some components without having their sources...My questions :* How can I find the guilty component ?* I tried to find it using Kap Inspector without success ...any tips for Kap inspector ?
