ActionScript 3.0 :: Multiple Event Handlers On One Object
Sep 18, 2011
Im tyring to turn a Movie Clip into a classic button - roll-over to display text, roll-off and text goes away, click and go to frame of animation. Each works on its own but when I put all 3 on the same Movie Clip (Tick1) each succeeding event listener seems to erase the previous one. Here is the code:
var txtField:TextField = new TextField();
Tick1.addEventListener(MouseEvent.CLICK, GoToStart);
Tick1.buttonMode = true;
[Code].....
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Similar Posts:
Sep 20, 2004
Is there a way to achieve what i'm trying to do here? Obviously it doesn't work this way because only the last event handler is activated and the first one is ignored.
[Code]...
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Sep 20, 2004
Is there a way to achieve what i'm trying to do here? Obviously it doesn't work this way because only the last event handler is activated and the first one is ignored.
PHP Code:[code].....
I'm simply trying to apply the function to the two handlers in the beginning of the first line: this.txtbtn_edegem.onRelease and this.btn_edegem.onRelease
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Jul 7, 2011
In the code below, I have created an instance of the DrawLineChart class called LineChart1.When I test the movie, it shows up on the stage just fine and when I click on it, I can use a trace command to get a string statement written to the output window. However, now I want to be able to click on LineChart1 on the stage and have it be removed. When I do that, I get an error message 1120: Access of undefined property LineChart1.
why I'm unable to refer to my instance LineChart1 and what I need to do so that I can refer to it and remove it when it gets clicked? why the trace statement works when I click on LineChart1 during runtime, but not the removechild command.
package{
import flash.display.*;
import flash.events.*;[code]....
trace("hello"); // This works. When I click on the LineChart1 MovieClip on the stage during runtime, I get "hello" as an output. removeChild(LineChart1); // throws an error 1120: Access of undefined property LineChart1.
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Apr 15, 2010
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?
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Jun 23, 2009
When, in ActionScript, an event is dispatched:
foo.addEventListener("some event", someHandler);
foo.dispatchEvent(new Event("some event"));
At what point are the event handlers executed?
I ask because I caught this at the end of an Adobe developer guide:
Notice that some properties are assigned to the [AsyncToken] after the call to the remote service is made. In a multi-threaded language, there would be a race condition where the result comes back before the token is assigned. This situation is not a problem in ActionScript because the remote call cannot be initiated until the currently executing code finishes.
But I could not find any information on what they meant by "currently executing code".
See also: [URL]
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Jul 3, 2010
I noticed that in anonymous event handler this is referenced to global, not my class. I know that I can use outer referenced variables (because it creates closures), but how to get right this context?
Simple example:
_movieClipClassVariable = new MyCustomSpriteSubclass();
_movieClipClassVariable.addEventListener(MouseEvent.CLICK, function(event:Event):void {
trace(this); //gives 'global'
});
What about memory usage and garbage collection objects with anonymous handlers? Is declaring handlers as class method better?
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Jul 23, 2011
My project has a target object (center of stage) and a moveable object, which is created each time a user presses "Enter". Each movable object is identified as part of an array (i.e., object[i]), and a new line (i.e., line[i]) is dynamically drawn from the center of the newly created object to the center target object.
Basically, as the object is dragged around the screen the line is to stay connected to the target object. Therefore, that specific line for that object being moved must be redrawn using a drawLine function inside the event handler. My issue is how to get line[i] to be identified within the even handler? (Using AS3 coding)
[Code]...
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Apr 14, 2012
How should I comment an event handler param?I mean, should I comment event handler param?Example:TimerMessage class extends Timer.TimerMessage class, has a setMessage method, which stores a text message whithin its public var 'message'.in usage:
var timer_message:TimerMessage = new TimerMessage(1000, 1)
timer_message.setMessage('hello')
timer_message.addEventListener(TimerEvent.TIMER_COMPLETE, displayMessage)
[code].....
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Jul 24, 2009
What methods do you use to unit test event handlers, particularly if they require information from the event (such as mouse coordinates, or the target of the event)? Is the most common practice to just refactor the behavior into a method that does the lifting while the handler just extracts information from the event, or are there effective ways to simulate event dispatch in FlexUnit or Fluint?
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Sep 11, 2010
stop();
var nc:NetConnection = new NetConnection();
nc.connect(null);
var ns:NetStream = new NetStream(nc);
[Code]....
load the swf once the flv is done playing? I think I'm just not loading the swf right because the flv plays correctly.
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Dec 12, 2010
I came to AS3 from JS world, and I should confess that anonymous functions are my weakness. I tend to use them everywhere. Now, coming to AS3 I've heard and read in lots of places, that AS and Flash are enormously bad at handling garbage collection, that one should empty, dispose and remove all event handlers and objects manually to avoid weird and unexplainable memory leaks and crashes. Not sure what part of this is true, but I would like to follow best practices right from the beginning. How bad is idea of using anonymous functions as event handlers? Consider for example a code like this:
addEventListener(Event.ENTER_FRAME, function() : void {
controls.elapsed = stream.time;
});
Ccontorls.elapsed is the setter, which apart from setting current play time for video player, updates the whole UI, and stream is NetStream object, which streams the actual video. There are lot's of other places where anonymous function may make code cleaner and more intuitive. Check the following code for simple fade-in effect for the control bar:
public function showControls() : void {
var self:Controls = this;
if (!visible) {
visible = true;
fadeTimer = new Timer(30, 10);
[Code] .....
I totally like how it looks and fits into the code, but I'm concerned about leaks. While Event.ENTER_FRAME handler probably would never become harmful in this form, what about timer listeners. Should I remove those listeners manually, or they will be removed automatically, as soon as I set fadeTimer = null ? Is it possible to remove listeners with anonymous functions properly at all?
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Mar 19, 2011
i have an odd issue and i know almost nothing about AS3 so im a complete noob please bare with me. I am working with a template .fla for a page flip but i am using a different navigation system for the flipping of the pages. I have worked through all the errors and output problems and i can get the system to work but the moment i try to use other event handlers for the same item it completely blows up the main script to make the page flip that is required. No errors, output problems etc, it just doesn't work. So here is the code.
Code: Select allHome.lnk1.addEventListener(MouseEvent.CLICK, clickHandler, false, 0, true);
function clickHandler(e:MouseEvent):void {
switch(e.currentTarget)
[code].....
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Sep 27, 2005
trying to create a menu dynamically from an array. I know there is a way to circumnavigate the issues i am having by making another array with linkNames in it (i think), but im trying to understand why this isnt working. Check this out.
Code:
var playerArray:Array = ["THIERY","FIGO", "RONALDINO", "WAYNE"];
var contents:MovieClip = this.createEmptyMovieClip("contents", this.getNextHighestDepth());[code]....
'currItem.currVar', in my eyes, should be assigned the value of 'i' at that time in the loop, then move on to the next currItem right? Tracing 'currItem' traces 'menuItem. menuItem'+i to the output window fine, so im assuming that currItem is indeed a reference to a unique clip to which assign an action. The catch is, its not assigning the action I want, its assigning the value of 'i' at the end of the loop to all currVar's.I recently read a post explaining this conumdrum, stating that "variables are not "burnt" into functions when they are placed there. They will reflect the variable, where ever it may exist at the time it was requested, not at the time the function using that variable was defined," but in this case,since I am assigning the value of 'i' to anothing variable inside my dynamic movieClip.
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Nov 24, 2006
I'm trying to rewrite a procedural ActionScript program as an OOP one: in the procedural version I set up event handlers for movieclips on the stage with a loop and it worked fine.However, when I put these event handlers in a class definition, it's no good. Simplified version below, which is just supposed to make a sound when the user clicks on the boxclass definition:
class Event_stuff {
var nLpCntr1:Number = 0;
var nNumberOfChoiceBoxes:Number = 3;wrong use of terminology
[code].....
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May 8, 2009
Say I have an array with 4 string elements that are 4 different urls. On the stage I have 4 movieclips that I want to have listen for a CLICK event. When the user clicks a button, the navigate to one of the 4 urls.I can loop through the buttons and add and event listener to each:
Code:
private function applyPlankLinks():void {
for (var i:uint = 0; i<numberOfPlankBtns; i++) {
[code].....
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Mar 29, 2005
how can I create event handler for a class that I wrote myself?
Example:
Code:
class blah {
var ladida:string;
function blah () {
[Code]....
How is it possible to create an event handler, like lame.onChange? When the variable inside the class is changed, how would i be notified?
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Mar 5, 2005
I'm making a piece of flash used for a website banner, previously i've had very little experience with action scipt as i've made various animations only having to use simple functions such as "stop()" and i've made a never ending scrolling menu also, but now i want to have an event that "onPress" a small animation is played where the mouse clicked the banner. What would be the appropriate script to link the .swf i make to the "onPress" command?
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Apr 9, 2010
I have this code:
var service:HTTPService = new HTTPService();
if (search.Location && search.Location.length > 0 && chkLocalSearch.selected) {
service.url = 'http://ajax.googleapis.com/ajax/services/search/local';
service.request.q = search.Keyword;
[Code]......
I want to pass the search object to the result method (onServerResponse) but if I do it in a closure it gets passed by value. Is there anyway to do it by reference without searching through my array of search objects for the value returned in the result?
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Feb 10, 2011
When I create something like the following:
<mx:DataGrid id"myDataGrid"
itemEditBegin="myDataGrid_itemEditBeginHandler(event)" />
When does the event listener for "itemEditBegin" get added and removed? Is this essentially the same as:
<mx:DataGrid id="myDataGrid"
creationComplete="myDataGrid_creationCompleteHandler(event)" />
protected function myDataGrid_creationCompleteHandler(event:FlexEvent):void
{
[Code]...
Basically, I'm wondering where I should add "myDataGrid.addEventListener" if I want to do it programmatically? Should it be in the creationComplete listener function of the object itself, or perhaps in the creationComplete listener function for whatever parent object it resides in?
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Nov 7, 2006
Code:
function checkButton(buttonHit:MovieClip) {
if (buttonActive == true) {
buttonHit.onPress = function() {[code].........
I've built a carousel that moves a set amount with button presses, and when the movement stops the item at the front of the carousel enlarges and becomes a button. However, when the carousel is moved to the next item, the previous still stays behaves like a button. Is there any way to remove the event handler from the movieclip?
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Mar 29, 2007
After figuring out that removeMovieClip won't work on objects with negative depth numbers, I've run into another stumbling block in some menu generation code I'm working on.For the most part, my menu code is complete, and functional. However I've been trying to clean up some of the display methods to make it a nicer and smoother interface.
When you rollover a menu item, a submenu appears. This submenu consists of a number of items. Let's pretend we have this MAIN MENU > SUBMENU > ITEM 1, ITEM2, ITEM 3.ITEM 1, ITEM2, and ITEM 3 are nested in SUBMENU. For example, the full path for ITEM 1 is _level0.mainmenu.submenu.item1.
SUBMENU itself consists of a background object and the item objects. The items all have event handlers assigned to them. onRollOver highlights a selection, onRollOut unhighlights the selection, onRelease jumps to the appropriate Movie Clip.
What I would like to do is assign an onRollOut event to SUBMENU that collapses the menu on a mouse roll out event. It works, however, when I do this, the event handlers of the nested ITEMs become nonfunctional. Is it not possible for parent and child movie clips to both have onRollOut events assigned to them? Or is there something else I'm missing?
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Apr 16, 2007
I'm having trouble figuring out how to create onRollover handlers for movieclips loaded with loadClip. I can attach event handlers to the container clip, but not the child clips within it (the grandchildren). I'm using MX2004 / AS2.The parent clip just doesn't seem to "see" any grandchildren. It doesn't seem to be a paths issue, and I'm working in an onLoadComplete function to make sure everything's loaded first. The goal is to be able to change what happens on rollover with data pulled in (via Flash remoting) to the parent clip.
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Feb 23, 2010
create, save, or store variables in event handlers (or functions invoked in them), to be used outside in the main body of a program. I am working on a project that is requiring me to load an XML file and then manipulate certain children in the file. Basically I'm trying to make a question and answer post with the XML storing the actual question and answers, also I'm trying to read in the max number of questions the XML file holds, and any other information. My problem is is that data stored in variables during the event or the function invoked due to the event isn't saved afterward.Here's a simple code from a site on google dealing with loading XML below for reference:
var loadmyXML:XML;
var myLoader:URLLoader = new URLLoader();
myLoader.load(new URLRequest("test.xml"));
myLoader.addEventListener(Event.COMPLETE, processXML);
[code]....
After the event is processed loadmyXML is emptied, so using it in the main body is pointless since the object doesn't contain any data. In C/C++ you'd have to pass objects by reference in order to modify them for outside use, but I haven't seen ANY syntax to show how you'd do that in events here. Like I'd prefer to save loadmyXML, store loadmyXML.questions.length() in a variable also, etc.
It's been a long time since I've used global variables in C so I've forgotten how they really work, but couldn't you just address them / change them inside of a function without ever calling them and it would reflect outside in the main program?
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Sep 26, 2002
I read this tutorial on dynamic event handlers on this site. I am still LOST as to how they work [URL]. Things like :
onClipEvent (enterFrame) {
if (this._x<300) this._x+=5;
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Jan 13, 2010
I am wondering how to correctly reference child/parent movie clips when creating event handlers? I have a button within a movie clip, which is within a movie clip.This is what my handler looks like right now:
this.DropMenus.DMSeats.ButtonSeats.addEventListener("click",SeatsOver) ;
The button instance name is ButtonSeats Problem is, I get this:
TypeError: Error #1009: Cannot access a property or method of a null object reference.
Also, if I were to move the vent listener directly into the movie clip where the button is located, how could I reference the parent/ parent timeline(the main timeline)? Am I correct to understand that .this refers only to the current clip?
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Aug 26, 2010
How can I add a set of dynamic images and then add event handlers to each that trigger a different event? My scenario is that I have a remote service that grabs a set of data (ArrayCollection) that has a className, classID and classDescription. I would like the images to have event handlers that trigger a new panel display that would show the "classDescription" for the particular class that is clicked. My problem is figuring out how to retrieve the proper set of data and adding the images properly to the panel.
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Jan 26, 2012
Could someone explain when does local SharedObject triggers event handlers added via addEventListener?I have tried and it doesn't trigger, after flushing.For example i have two object.swf both in separate browser tabs.I'm adding data inside object.swf on one tab and want event to be triggered in object.swf from another tab.Is it possible with native functionality and without remote type of SharedObject?Ofc i could write infinite loop and check local storage for changes, but it's the last solution i would like to implement.I was reading docs and played with example over there, but it doesn't trigger event, even if it is added before flushing.[code]
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Feb 17, 2010
I'm now convinced there is some sort of mechanism built into Firefox that seems to turn off the mouse event handlers in flash applications on the html page when the user scrolls the page or does any other sort of mouse interaction with the web page itself. This issue does not arise in IE (go figure that one) or chrome, but does seem to arise in Safari as well. I'm sure theres probably something I need to do to the html to make sure the flash mouse events are always active and superseding whatever mouse events are built into the browser. At first I thought it might be because the one nav bar i did was rather complicated with lots of layers and AS on multiple frames, but when I did a much more simple navbar with only 1 frame of AS, i still run into the same issue.
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Apr 12, 2011
Baisically I've created a button using symbol and I want the button to move a movie clip up the y axis by 4 every time it is clicked (move the movie.) I really don't know how to do this. This is what I currently have but its not ActionScript:
[Code]...
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