Actionscript 3 :: Using Instances Already On Stage From Another Class?
Feb 23, 2011
I'm new to this OOP stuff, and I'm having a hard time understanding all of this.I'm trying to recreate in AS3.0 with classes a simple whack-a-mole game I created in AS2.0 using timeline coding.I've read through a lot of forums, but I still don't understand what exactly I'm doing wrong.Heres my setup:I have a movie clip named mrBunny (my girlfriend told me to change it to bunnies as moles were too ugly.). Now there are 6 instances of mrBunny on the stage, each named mrBunny0-5.The mrBunny symbol is linked to the com.mrBunny class.The class has a method called randomPlay(); which I use to randomize the animation times of mrBunny.I also have a button on the stage with the class stageBtn.
package com{
import flash.display.SimpleButton;
import flash.display.MovieClip;
[code].....
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Jul 16, 2009
I'm slightly new to Flash CS3 + AS3 combo, so its more of a lack of practice question. My question stems from the problem described here http:[url].... . Note, its not the same problem, its a new one.The Problem ,So I have multiple library assets (which are on teh stage) and I want to assign similar functionality to all of them.
Attempt 1: So I create the n assets, create a custom class in AS3, link them to Flash CS3 and obviously enough it gives me the error that multiple assets can't be linked to the same class.Obvious enough to understand (well not completely, because from a programmers background it doesn't make sense).
Attempt 2: Same as attempt 1, but instead of linking all the assets to the same class I make the base class the same class, and let the derived class be dynamically created by Flash on compile time.So the linking works, but the problem is, in my base class I have a method which does something (say an tween) on a child of the library asset. So if the assets on the stage/library are called asset1, asset2, asset3 (same name for asset name, class name, id name), each of them has a sub-movieclip called ... say 'foo'. now if I manually wrote a class for each asset, I could do 'this.foo' to play with the sub-movieclip. However since this functionality is in the parent class, I'm unable to do it.
P.S. If you're form a programming/OOP background, its basically a abstract class problem. My Base class knows how to doSomething(), but it needs aSomething, which is defined in the Derived classes. However I found out that AS3 classes don't support virtual(C++ )/abstract (Java) in the true sense of the word (unless I missed some obvious documentation).
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Apr 1, 2010
I'm writing a series of Search windows for an application. I create the FLA files on the stage, each has 3 simple buttons: next_btn, prev_btn, and close_btn. Those all have event listeners which call findNext(), findPrev() and closeWin() respectively. Each search window looks for different things, some with a text box and some with a combo, etc.
So I have a base class com.search that extends Sprite and adds the eventListeners at startup (actually, on addedToStage). Like this:
function isAddedToStage(evt:Event){
next_btn.addEventListener("click",findNext); prev_btn.addEventListener("click",findPrev); close_btn.addEventListener("click",closeWin);}
[Code]....
If I add the event listeners in the derived class rather than the base, it works fine. But that seems to defeat the purpose of inheritance, plus it infers that I won't be able to derive new classes/swfs from those derived classes.
how does one reference objects created on the stage from a base class of that document's class?
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May 22, 2011
Assume I have the myCircle class all defined and all that. If my code is as follows:
[Code]...
How would I write a function to return an array of [circle1, circle 2, circle3, circle4] automatically?
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Nov 20, 2010
I can access the targetObj instance inside the document class, but when I try to access it in another .as class,get this error:
Access of undefined property targetObj.
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Nov 20, 2010
I can access the targetObj instance inside the document class, but when I try to access it in another .as class,get this error:
Access of undefined property targetObj.
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Dec 15, 2011
I have created a game in flash, and due to the nature of the game, I have many movieclips placed on the stage manually in Flash CS4. They are not programmatically added as children to the stage, and so I am having difficulty getting access to them in the document class. So far the only method I have been able to use is to do stage.addChild(active_area); (for example), but there are many movie clips, all very differently named, so this method seems incorrect.I've discovered that my MovieClips are not children of the stage, but in fact MainTimeline, as when I for loop through stage.getChildAt(i);, only one child, root1, is traced out. How can I access movieclips that were placed on the stage in the timeline from the document class, without having to manually add them as children to the stage? So it looks like my problem wasn't that I couldn't access the MovieClips, it was that I wasn't modifying the MovieClips' values, so I wasn't registering any change in them.
Here is the code after I fixed it:
function manage_cursor(e:Event):void {
prevX=currX;
[code].....
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Oct 26, 2009
my movie is linked to an external class called game, and in the game cosntructor I am trying to access instances on my stage. I have tried MovieClip(root).instancename, root.instancename and even tried adding an event listener to listen when the movie is done loading because I thought maybe it was because the instances on the stage weren't created before the constructor is ran. This is the main class, shouldn't it be easy?
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Sep 27, 2011
i have several instances of the same class on stage every time i change the text in the text field of one of the instances, they all change i would like to have different text in each instance?
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Jul 8, 2007
I want to know how to make class instances into listeners and broadcasters, from inside each class. Here is what I am trying specifically... part of the Proj class... (projectiles, as a matter of fact)
Code:
private function listen():Void {
u.register(this);
onUpdate = function(){
step(); // a function I have which makes the projectile move (not shown)
}
}
where "u" is another class, the Updater class with this code...
Code:
class Updater {
// const. --- make this a broadcaster
public function Updater(){
[code]....
PS: What is the syntax for using AS2 code tags instead of just "[CODE|"?
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Dec 23, 2006
Let's say i have a bunch of balls/cells. I'm having trouble figuring out how to make it so that every other ball bounces off of every other ball.
so in short, it's really one instance being able to check all other instances of the same ball class?
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May 3, 2010
I have a class called shapeC that only creates a rectangle and then addChild(rectangle);. That class is instantiated on the main timeline. Currently, the only way you can see that rectangle is to add the instantiated class to the stage via addChild(shapeC);. My question is, is there a way that the shapeC class can add the rectangle to the root stage without requireing the instantiated class to be added to the stage?
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Jul 25, 2011
I've been hitting dead ends while programming lately all over, and I finally came to the realization all the code I have that is broken is because I don't know how to interact with instances of one class from within another. Here's the gist of what I am trying to do:
if(this.hitTestObject(targetClip)){
trace("hit!");
}
The problem is, if I address a single instance that is on the canvas, I get "access to undefined property targetClip", even though the document class can interact with it fine. If I target the class file of targetClip, I get "Implicit coercion of a value of type Class to an unrelated type flash.display:DisplayObject". It isn't just a problem with hitTest either, I'm having this problem with other actions, so there is some basic syntax I'm failing to comprehend.
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Feb 16, 2010
I have this library with more than 80 objects that i want to bind to my keyboard. My idea is use the "keyCode" to call the object to the stage, constructing the object's name inside a variable.This is the code that I'm trying to use, but the bold text line always give me an error (constructor, syntax and others) depending how i write that line.[code]I'm not very experienced with AS3 so i don't know if this is the right approach to solve my problem. Any help is well received.
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May 20, 2011
I am making a flashcard game with five subjects. It has buttons for moving forward and back,and buttons for switching to another subject The card instances for each subject are stored offstage, in separate frames (five in all), and their names are stored in arrays (five in all) Each time a button is pressed, the appropriate card tweens onto the stagepoint were still visible (not sure why, since the menu's on it's own frame), so I wrote a function to clear everything offstage whenever the menu button is clicked.My problem is weird: if you are in the math subject, switching to geography returns this error:
TypeError: Error #1009: Cannot access a property or method of a null object reference.
at flashcardapp1_fla::MainTimeline/frame3()
at flash.display::MovieClip/gotoAndStop()
[code]....
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Jan 16, 2012
I'm working with Flash Builder 4.6 as an IDE and Flash CS5.5 to create library items. The problem is - when I put an instance of a library item on the stage or inside of another item, Flash Builder fails to detect the instance name that was declared in Flash CS. This doesn't prevent the code from compiling just fine though.
I understand that the IDE only sees the fields that I have declared directly in the .as file, but it really hinders me that I the IDE goes crazy when I do this.
Is there any way to circumvent this - other than dynamically creating and placing the instances?
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Oct 22, 2009
I was just wondering if there was a way to find all button/dynamic text instances that are on stage. This would allow the dynamic creation of array instead of having to manually create this array.
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Nov 2, 2010
I have a stage instane called 'titleBox' in a SWF, which when loaded is dynamically filled in.
When testing straight from the SWF there is no problems at all, but when the SWF is loaded into the main SWF I get the error:
'Error #1056: Cannot create property titleBox'
Which I can't understand as it exists, any suggestion would be awesome.
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Feb 26, 2011
Is there any way to iterate through instances placed manually on the stage in Flash IDE? For example I have 3 "Dog" class instances placed on the stage and I'd like to access them all from document class without giving them instance names.
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Jan 11, 2012
Say, for example, I have a car on a flat plane. It can move either left, up, right or down. I also have 10 obstacles on the stage. Each time the car hits one of them it should automatically turn to avoid it. I could loop through each obstacle and check if it is colliding with the car but a better approach would be to make an obstacle class that checks if the car is going to collide with that obstacle and if it does, make it change direction. My problem though is what about if I had 5 cars? Would the obstacle class have to loop through each of the cars to check if any are colliding with it? My main concern with this is how much the performance of the program would be affected. I imagine with only 5 cars the difference would be insignificant, but what if I had 1000 cars and 1000 obstacles? Going back to the first example, it is easy to see how you can use a class as opposed to using a loop but with the second example, I just don't know.
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May 5, 2009
Sometimes I got
[object MovieClip]
Sometimes I got
[object SomeName]
I don't know why! I never click the "export for actionscript" and the symbol names in my library are given "Onename" "SomeName", rather than "MovieClip" ...
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Jun 23, 2009
in the code below, there is something wrong with this line: movieClipsStage[n].addChild(thumbList[n]);
import fl.transitions.Tween;import fl.transitions.easing.*;
var thumbArray:Array=new Array();var movieClipLoader:Loader;var movieClipsStage:Array=new Array("mc0","mc1","mc2","mc3","mc4","mc5");
var myXMLInfo:XML;var thumbList:XMLList;var myXMLLoader:URLLoader=new URLLoader;myXMLLoader.load(new URLRequest("Data/myStarList.xml"));myXMLLoader.addEventListener(Event.COMPLETE, loadComplete);
[Code]...
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Sep 10, 2010
I'm trying to dynamically place instances of MovieClip on the stage. Receiving an error:
TypeError: Error #2007: Parameter child must be non-null.
at flash.display::DisplayObjectContainer/addChild()
ActionScript:
// properties in class ----------
var circle_ary:Array = new Array;
var circ_num:int;//number of circles on the stage.
[code]....
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Sep 26, 2010
I have an instance on my stage that I dragged from my library at design time.This instance links to a custom class who's constructor takes an argument.[code]Is there any way to set arguments on an instance that has been manually dragged to the stage?
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Jul 4, 2011
I have a number of instances of a MovieClip on stage. These are dragged onto the stage and arranged manually. Now, I would like to alter the instances during run time, using as2 code.
how can I name all the instances of the same MovieClip dragged onto the stage, using as2 code? (specify if the solution involves exporting the library MovieClip with an identifier name)
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Feb 11, 2009
however I restructured my folders and now my .fla is in the /src/ with my MainApp.as ( Document class )
then MainApp creates a new instance of a class that is in /src/blah/blah/deep/
When this new as class is created it has a few buttons on it that are declared in the .fla as instance variables. I have turned off automatically declare stage instances.
[Code]...
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Mar 19, 2010
I would like all the instances of my movieclip to unload once a variable has reached a certain number.
So that when the movie goes to the next frame, all the movieclips are unloaded.
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Jan 16, 2011
I am working on a project in which I need to create a bunch of buttons.. all need to look the same with different text on the button.. rather then making each button separate in my library I would like to make one and create instances of the one button. I have created a button with a text field on top named txtLabel with a default text of "Label Here". I have dragged an instance of the button onto the stage and named it btnHome
btnHome.txtLabel.text = "Home"; d
Does not work..
I get the following error
TypeError: Error #1009: Cannot access a property or method of a null object reference.
at MyProject_fla::MainTimeline/frame1()
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Mar 5, 2011
Ok what i want to do is to put MORE than one instance of a MC on stageFor that i try to create a name to the MC inside a (FOR) loop (working)what dident work is to put multiple instance of it on stage.Seem preety basic but i can figure it out
function generateHex(e:MouseEvent)
{
tileSet.x = tileSize;
[code]......
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Aug 26, 2011
How do I add multiple instances of the same mc to the stage dynamically?
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