ActionScript 3.0 :: Display List Manipulation Removes Object From Frame?
Nov 16, 2010
I've got these Flash students I TA for a course, and they are doing drag and drop exercises and have come across some weirdness.(They are using a frames based design to represent different pages of activity, with a menu to goto each frame under user control.)At author time:
1. they set up drag and drop as3 for an object on a particular frame.
2. when startDrag is initiated, they moved the dragged object to the top of the display list, so it appears to float above all other objects as the user drags.
at runtime,a problem appears:the object seems to have been pulled out of the frame, and now floats in a display list above any frame that may be advanced to.What's going on here? It's like the object got pulled off the authortime stage and now is disconnected. Going back to the drag and drop frame shows the original object again, reinstanced, along with this copy that got pulled out.
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Nov 4, 2011
translate this piece of code to AS2? Don't ask why
var pictureIndex:int = 0;
var pictures:Array = [];
mc_animation.gotoAndStop(1);
mc_animation.visible = false;
mc_animation.addEventListener(Event.COMPLETE, animationCompleteHandler);
[Code]...
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Feb 1, 2011
I consistently seem to run into an issue. When I addChild(mc), features and assets that need to be rendered on the display list, are not available immediately for actionscript access. For example, the use of MovieClip(root) and alpha manipulation (right? or not?) of the movieclip being added (or of it's children) does not seem to be available immediately. So, I have tried the following, which didn't seem to work either, but maybe it's correct and I had a complicating issue?
Let me know the "proper" way to know that a movieclip has been rendered so that I can access features requiring the asset to be on the display list? What I've tried is below:
var mc:MyMovieClipClass = new MyMovieClipClass():
this.addChild(mc);
this.addEventListener(Event.ADDED,mcReady);
[Code].....
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Mar 6, 2008
Is there any way to test if a display object has been added to the display list?
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Mar 4, 2011
What's a simple way to detect if a display object is currently on the display list?
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Feb 9, 2009
It's my understanding that a display object cannot be in the display list more that once.So if I add something to the stage shouldn't a second addition of the same object replace the first? for instance:
[code]...
there should now only be one "myDisplayObject" on the stage.
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May 10, 2010
I am tryin' to emulate simple button functionality and methodology.To finish, i need to emulate 'hit' framelabel, where everything you put inside will be that frame will be the active zone of all button states.But i don't know how to read that framelabel, if button is not at that framelabel.Why button is not at that framelabel?, 'cause button is either at 'up', "over", "down" framelabels, 'hit' label is and actually never played framelabel, but i need to read it once so that i can to replicate its contents to all other framelabels.I'm aware i could just use a display object with an 'hit' instance name throughtout button's timeline.But what i am trying is to, it's to emulate 'simple button' methodology as i stated
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Oct 4, 2010
i have this really basic class and all it does is create a button...i have another class called main where i want to put the button on the stage...problem is it all compiles but can't get the button to display..
public class Main extends Sprite
{
public function Main()
{
[Code].....
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Oct 7, 2010
Is there a way to make a display object always be at the top of the display list?For example, I know you can set the childIndex, i.e:setChildIndex(myDisplayObject, numChildren-1);But is there a way that an object has sensed that something else has been added to the display list and restack themselves accordingly?
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Mar 30, 2011
Because of screen size, I must ensure we're only displaying necessary data to the user.I have a drop down box that contains only 5 items and I would like that when an item is selected, it doesn't appear in the drop down box (since technically it's showing twice, once at the top as the selected item and once in the list). how I would achieve this? I tried using a custom CellRender and overriding the "set selected" function to call this.visible = false if selected is true, but that simply hides the item but does not remove it from the layout of the drop down list.
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Jun 14, 2009
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Feb 24, 2011
I have an object that controls another object that is on the display list.
The setup looks like this:
Parent (Main Timeline)
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-- Grandchild --> contains instance of behaviour class that controls the grandchild's movement
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How can I get this event to reach the parent?
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May 10, 2011
I have an application that uses a main class to control other MovieClips, adding and removing them as needed, most of them are separate screens or sub menus.
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I read up on this and found out that removing the child doesn't necessarily remove it from the memory.
I tried setting the mainmenu to null before moving onto a different screen but this threw up an error, stating that the parameter child must be none null.
how to completely kill my mainmenu when it is not needed.
public function confSubMenuOneScreen():void {
subMenuOneScreen = new SubMenuOne();
mainmenu = null;
[Code].....
This is the example of code that removes the menu and adds another screen, with the mainmenu = null code that throws up the error.
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Nov 28, 2008
Any command to check whether an object is currently present in the Display List? I have a TextField called _startHereText. I have some logic where I need to sometimes use RemoveChild to take this object out of the Display List, but I first need to determine if it is presently there.
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Sep 21, 2009
For some reason below is not working. It is probably very obvious but I am not seeing it. As soon as I comment out the container mc variable and just add Child to root timeline I see everything which means me container is not being added to the stage correctly.
stop();
import flash.display.MovieClip;
var i:int = 0;
var a:Number = 10;
var ageString:String;
var ageText:Array = new Array();
[Code] .....
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Jun 7, 2010
I'm trying to dispatch a custom event from a custom class (which implements IEventDispatcher) to another custom class (also implements IEventDispatcher) but I cannot trigger the corresponding event handlers.The classes are instantiated at different parts of the application: one on the main canvas and the other on the back-end (data side) of the app. Neither of these is part of the display list hierarchy and I need them to communicate through events.I've looked through adobe docs, the web and Mook's Essential AS3, but have come up with nothing...
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Jul 12, 2009
I need to access a non-display list top-level (Parent? Ancestor? What's the correct term?) object from a display list object, and I don't know how.
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I want to refer to the correct Result object when the user clicks on the corresponding card to call a function there. In accessing the sprite manually, ResultX.card works fine, but I don't know how to go upwards trough the path - card.parent (or actually target.parent, since it's done via event) just returns Main, of course.
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Dec 8, 2009
I'm trying to create an image class that I can reuse throughout a website I'm making.
When you click an image i want it to expand to fill the screen. When this happens obviously it will have to be at the top of the display list so that none of the other objects on the website are above it. The problem is that I want to be able to use this class throughout the website, even within containers that are beneath other objects so it seems impossible to simply bring it to the front easily?
Edit: Maybe when you click an image it would create a replica on top of the current image but above all the other objects on the main stage - then expand that one instead of the original image in the container? Theres got to be a better method though... I can't imagine this working too smoothly.
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Nov 3, 2011
I have an object that is instantiated, then placed into a property within a singleton (single instance) object. When a button is clicked an event is dispatched carrying a payload that references the display object that is held within the Singleton. When the event is heard, my view object adds the object to the display list e.g. addChild().The Item shows. Now If I hit another button an event is dispatched, and a new item is added to the display list via the method above and is seen. The 1st object is removed from the display list Here is my problem. When I click the button to load the 1st Object the above process is executed again but the object does not show.
I can run trace statements from the object that is supposed to be visible and they run fine. I even do a check to see if the visible property is set to true, and it is, but not object is on my screen. Code for this process.
//custom event carries the name of the page aka display object. this is a string
dispatchEvent(new MenuEvent(MenuEvent.CHANGE_VIEW_STATE, event.payload));
//When the event is heard, the following condinial is run
[code].....
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Oct 1, 2011
i have made a list control. i want to display the name of the objects in it in a text control box
the code i am using here is
public function add(event:MouseEvent):void
{
var str:String;
str = mylistcontrol.dataProvider.getItemAt(0).toString();
[Code]....
The problem with this code is i am using index value of 0. however i want to display the name of object on which i have clicked or which is highlighted.
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Oct 18, 2010
If an asset (say an swf) is already loaded. Does it increase memory use to add and object to the display list?
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Aug 22, 2010
how do we remove object( sprite which has an external swf as it's child ) from display and more importantly from memory yet we still can use the same variable to add another object (yes another sprite like the one we removed yet has different content).., "
i did tried the removeChildAt thing it did remove all the child from the display list but i still can hear sound from video running.
here is small scale code of what i'm doing (sorry that i can only give you chunk code of loading and adding)
// var SWFList:XMLList; //used to hold a list of all external swf source,atribute and etc// var totalSWF:int; //hold the total number of external swf there is to be loaded
// var swfLoader:Loader; //instance of loader class used to load the external swf
[Code]....
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May 9, 2010
When I'm removing an object from the display list (via removeChild), I'm performing a splice on all of the arrays that the object has:
[Code]....
My thinking was that this frees up some memory similar to disposing a bitmapdata. Does this even do anything? Or, will arrays be cleared and the memory usage restored when the object is removeChilded?
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Feb 20, 2011
With the following code, everything works as expected, and I retain both the default namespace, and the xsi namespace in the trace printout.
var tempData = <objects xmlns="http://www.spicefactory.org/parsley" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
</objects>
[Code].....
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Jan 17, 2010
I am curious if anyone knows how to code a button so that when you click it an object resizes, but shows the animation of it resizing. For example I know that
ActionScript Code:
btn1.addEventListener(MouseEvent.onRelease, resize);
function resize(): void {
[code]......
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Aug 26, 2011
I have a removeChild and null question. I know removeChild removes my object from the stage but stays in memory until I call null on it. My question is, if I set the object to null, do I have to removeChild it at all? For example, I have a movieclip where I addChild lots of objects to it. So If I want to completely remove all traces of said movieclip and all its children, can I just set movieClip = null, or do I have to removeChild all its children and the movieclip itself beforehand.
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Mar 7, 2011
Im creating a game. When the current game has finished, I thinking to do this:
removeChild(game)
game = null
then
game = new Game()
Doing this way, it automatically removes the games object instances? It automatically removes the games object instances events? That would be an easy way to restart the game, if yes for both questions.
Can I do like that, or I have to remove all objects and events manually?
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Dec 21, 2009
In my application, I have a chart that I want to display in a TitleWindow when clicked on.
var win:TitleWindow = PopUpManager.createPopUp(this, TitleWindow, false) as TitleWindow;
win.addChild(myChart);
PopUpManager.bringToFront(win);
It does indeed place the chart in the titlewindow that shows up, but it removes the original chart from the parent. Then, when the titlewindow is closed, my chart is simply gone. I can't figure out how to clone the chart -- all the methods I've tried failed
Solution:
public var barChart:BarChart;
public function onClick(e:Object):void
{
[Code].....
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Apr 30, 2010
getChildByName('name') will work as long as that child is in the first frame.
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Nov 10, 2010
I am using swfLoader to load external flash movies in my flex/actionscript code. If the loaded swf was made for the newer flash player versions (I believe 9.0 or more) it loads as a flash.display.MovieClip object which has methods for play/pause and go to frame. However if the loaded swf was made for older flash player (I believe 6.0) then it loads as flash.display.av1movie which doesn't have methods for play/pause. Is there a way I can play / pause the av1movie from my flex code.
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