ActionScript 2.0 :: Best Practices For Adding / Removing Elements?
Mar 7, 2006
I thought i'd start this thread to uncover peoples habits and practices when it comes to the simple operation of adding and removing elements on stage. I ask because there are so many alternatives, and I keep wondering what might be the best/most eficcient way of doing it. Let me explain by giving an example:
Your user has chosen to click that flashing button that says "Sign up for our mailing list" and you need to prompt the user for a valid e-mail address by presenting him/her with an alert box on top of everything else. Do you.[code]....
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Apr 3, 2009
I have a question about how best to remove display objects.removeChild(object);Given that there are no other reference to this object, does using removeChild alone make the object eligible for garbage collection, or does it also need to be given a null value as well?[code]In both these cases, I get the classic 1009 error. That leads me to believe that if you use removeChild, you don't also need to give the object a null value.?url...
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Nov 15, 2011
I want to write a function which removes elements from an array of integers starting from the lowest values without changing the positions of the elements. Programming language is ActionScript3.
[Code]...
I know Array.NUMERIC and Array.DESCENDING would change the position of the elements, but I can't seem to figure out the logic on how to keep their positions.
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May 4, 2010
Ive just finished the foundations on my flash site.. each button directs to each area etc etc.The way I have structured my buttons is as follow,[code]so basically if I click on a button Im not at already, the elements from the current section are removed from the stage and im directed to the new section.This works fine for simple objects like shapes and text but some of my sections have custom scrollers and functions and this is where I've run into some errors.If I remove from stage and set to null like I've been doing, everything still works fine, but my output window complains off null object references ? If I remove from the stage but dont set to null my functions stop working and I get an error stating the displayobject must be a child of the caller ?
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May 29, 2009
I am having issues with this method. It's supposed to loop through stage elements (news feed) and check if the item is checked/enabled. If they are, it should add them into an array ratingAC, which will keep track of the number of elements that are rated, and the rating total. The problem I am having is that only one item is added to the total even if multiple are selected.
Archive Vars......
[Bindable]
public var newsDB:ArrayCollection = mx.core.Application.application.newsDB as ArrayCollection;
[Code]....
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Mar 21, 2010
I have 2 arrays, one of images, the other of links I would like to create an XML list using the values in these arrays. My code is similar to:
public function savecards():void var coverflow:XML = new XML(<coverflow/>); var cover:XML = new XML(<cover/>);
for (var j:Number = 0; j < 2;
[code].....
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Feb 20, 2007
i have a clip on the stage that is 650px wide. i am placing dynamicaly sized clips on top of that clip. when they are created, their names are placed into an array. I am trying to take the items out of the array, find their widths, and then figure out if the width will be greater than 650 if the next clip is placed down. i'm stuck on the loop.
("track1Clips" is the array i have the clips in) here's what i have
for (i=0; i<_root.track1Clips.length; i++) {
clipName = _root.track1Clips[i];
[code].....
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May 12, 2010
Pff is there a way to add padding between elements in a TileList
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Nov 18, 2010
If you see google finance or other such charts, they usually have a small pentagon on the chart that indicates when the dividend was paid. Note the D markers in the screenshot [URL]. In this link you will see A,B,C,D .... along the charts X-Axis. If you choose a larger data range say 2005- 2010 , then you will see blue dividend markers along the x-Axis. Is there any thing in Flex that will allow us to do that?
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May 2, 2008
Basically i've got a timer which records how long a user remains in either section A,B or C on my site. Each time the user switches from say A to C, the time spent in the section A is recorded into Array A and so forth. What i'm having difficulty with is adding each of the elements within the array together..... Top bits are just the button functions....bit in bold is what i would THINK would be the correct way to add the elements together - with a for loop....
[Code]...
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May 5, 2005
When I simply add an element (jpeg) to an array it wont show when previewing, even though it gets traced.Here's the deal:
Code:
this.pathToPeople = "images/photo/people/";
this.peopleArray = ["1_people.jpg", "bas1.jpg", "2_people.jpg", "3_people.jpg",
[code].....
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Apr 11, 2011
I'm refactoring some Flex code written by another developer and I'm implementing a PresentationModel approach, as I like to separate out the ActionScript from the MXML. One of the problems I've found is that the original ActionScript code adds/removes elements from the MXML.What happens is the handler function checks the model and if the values are correct will either create or remove a element from the view. What is the best way to get the presentation model to ad elements to the view and still keep this loose coupling that I'm aiming for.I was thinking of using simple events which the presentation model dispatches and a view can list for passing the details of the element to add.
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May 20, 2008
I have a list of buttons that each load an external SWF when pressed. When a button is pressed, the SWF loads into a movieclip on the main timeline, and the list dissappears (so only one is loaded at a time). The main timeline moves to a frame with a back button. When the back button is pressed, I'm trying to remove the loaded SWF and make the menu visible again to load another SWF.This all works, but when I get back to the menu and try to load a new SWF, I get the error:TypeError: Error #1009: Cannot access a property or method of a null object reference.at CrystalBall/PL_LOADING()rystalBall being the first SWF I tried to load. The error fires like, four or five times too. I know it has something to do with the code trying to remove the loader before it loads it again, but I'm not sure how to fix it
Code:
package {
import flash.display.*;
[code].....
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Jun 30, 2009
I am pretty new to actionscript 3. I want to remove the movieclip on the stage and add a new movieclip but the button is within the currently running movieclip that I want removed. I am trying this function
homeArtist_btn.addEventListener(MouseEvent.CLICK, newArtist);
function newArtist(e:MouseEvent):void{ removeChild(homeAni_mc); addChild(artistAni_mc);}
I get these errors
[code]........
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Dec 16, 2011
the problem occurs when I remove the button, the button has been exported for actionscript, when I remove the button to change the page/page layout, when I return to the page, the button remains in its "over" state.so im wondering if there is a way to reset it either before its removed or when its added.I cannot use gotoAndStop(1);because I am working in a package file.
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Feb 23, 2011
I have a bunch of movieclips called firstNameBtn_mc, lastNameBtn_mc and many others. I also have a bunch of movieclips whose names start with the same but instead of "Btn" they have "Arrow", like firstNameArrow_mc, lastNameArrow_mc etc.
What I want is when I click on firstNameBtn_mc it does somthing to firstNameArrow_mc, but there are so many buttons I would like to do it in the following way.
1. get the movie clip's name...something with e.currentTarget.name for example
2. remove the Btn_mc part
3. add the Arrow_mc part
4. do something to the movieclip of that name
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Feb 22, 2012
I'm making a banner rotator that reads image urls from an xml file and adds them to a sprite on the stage, then tweens them into position. Here's the relevant code:
[CODE]....
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Jul 1, 2010
I'm trying to do something that I'm not sure if it's possible. I have to add or remove multiple listeners that will trigger the same three methods (onComplete, onError and showProgress). I was trying to do something like this:
[Code]...
Is there anyway to solve this? It seems that after passing through the addListeners method, the loader instance gets lost.
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Mar 15, 2012
So basically I've got a MovieClip called Jug and when the egg is clicked and dragged to the Jug I want it to disappear and then re-add itself in the place it first started. Aswell as this I want a variable to be added by 1 in value. I have tried fiddling around with this for a while now and I can't figure it out since when I remove child it gets errors. Here's the code:
[Code]....
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Nov 9, 2009
I have 4 separate photogalleries, they are all swfs called by buttons with UI loaders attached. The problem is when one is called the loader remains on the stage I need to be able to remove any loader on stage BEFORE calling another page weather its a photogallery or not.Easiest explanation is how I used to do it in AS2 example 2 btns /2 load separate swfs into level1 on each btn I would have
unLoadMovie(1)
LoadMovie (xxx.swf) 1
I need to do the same thing in AS3 Also, do I need to use separate loaders or can I use one loader and instance names? Below is the code I have now (btns are in two areas)
main timeline btns (all btns except photogallaries)
stop();
home_btn.addEventListener(MouseEvent.CLICK, onHomeClick);
[code]....
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Mar 8, 2011
I have a MC called Enemy. It contains a monster that pops out at a random time (a timer with animation inside the MC). It stays on the stage for a few seconds and then hides again. If it hides, I want it to be removed and another enemy be added instead. All the monsters are instances of Enemy MC that are inside enemies[] array.[code]
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Apr 21, 2011
ive made a flash website containing 5 pages all accessed via flash buttonson one of the page ive tried loading a external swf file and then added event listeners to each of the buttons so when a new page is selected the swf file doesnt continue to play in the background on the other pagesthis works, however when i then try to change page again this error is displayed:ArgumentError: Error #2025: The supplied DisplayObject must be a child of the caller.at flash.display:isplayObjectContainer/removeChild()atValleyViewingWebsite_fla::MainTimeline/btnClick()below is the code im using:
var Xpos:Number = 110;
var Ypos:Number = 170;
var swf:MovieClip;
[code].....
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Aug 24, 2011
I am creating a game and want to reward the player at the end of a level by playing an animation. I have created a timer to add the animation to the stage but cannot figure out how to remove the animation once the timer has completed counting. I am sure you wise scripters out there know the secrete to this mystery.
[Code]....
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Mar 3, 2012
I've spent hours, and for all my self taught newbie-ness, I can't crack this: I have a navigation panel with several buttons. Lets call it mainNav. The mainNav buttons each add to the stage their corresponding MCs. They also remove any MCs from previous buttons currently on the stage. This is done by creating the MCs as variables, pushing those variables into an Array, and, when the mainNav button is pressed, calling the following function to remove the old (provided with assistance of the nice folks here), and then addChild(correspondingChild)
[Code]....
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May 21, 2009
I want to make a button with the function, adding and removing display objects. I have a button named solutions. I wrote the basic code for adding the external swf file and test the movie. When I click the button at first time, it loads the external swf file. However, when I click the button at 2nd time, it runs the external swf file again. I can't figure out how to write the code to tell the button not to load the file again when the file is already loaded.
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Feb 20, 2009
I have two clips on the stage with mouseover and mouseout actions. When you roll over a clip, a new clip is created and added to the stage. I then use the drawing methods to draw a callout.It works fine the first time, but when you roll over the second clip, the drawing for the previous object is not erased and it adds to the drawing with the information from the second rollover.
Code:
node1.buttonMode = true;
node2.buttonMode = true;
[code].....
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Apr 27, 2011
i am currently trying to write code, so if i enter a value into a textbox it will move a symbol up and down the screen according to the value. I was using the method of removing the child at for example removeChildAt(1) then deleting it and re adding it in a different place. But for some reason as i have 10 symbols and textboxes it kept deleting random things. So i decided to try remove child by name, but this still hasn't worked.[code]
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Dec 17, 2009
I have this code: btn_nav.addEventListener (MouseEvent.CLICK, navPop);function navPop (e:MouseEvent):void{themIn = new Tween (btn_them,"alpha" ,None.easeOut,0,1,10,false);}I need to set up a conditional adding / removing this btn alternately on click - just not really sure how to approach that.
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May 24, 2011
I want to iterate over an ArrayCollection in Flex while there can be items added and removed.
Since i didn't find a way to use a "classic" Iterator like in Java, which would do the job. I tried the Cursor. But it doesn't really work the way i want it to be ;) So how do I do it nicely ?
var cursor:IViewCursor = workingStack.createCursor();
while (!cursor.afterLast)
{
[Code]....
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Jun 13, 2011
I am using Adobe Flash Builder 4 Premium. I have a mx:DataGrid and a s:TextInput, and I am trying to set up a search box that filters the DataGrid on each key press.his page shows a nearly perfect example of what I'm trying to do, except that I'm setting this up in a s:TitleWindow, which is brought up as a popup using the PopUpManager. The list I'm trying to filter can be very large. It is a list of usernames, fetched from a MySQL database via PHP. Since it can be so large, I want the list to be populated once in the main application and then referenced in the popup window so that it doesn't have to fetch all the usernames each time the user opens the popup.I have all of this working fine for the first time you bring up the popup, but if you close it and bring it up again, I get this runtime error:I also get this error if I attempt to set the filterFunction back to null just before closing the popup.See sample code below:
Main Application:
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
[code]......
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