ActionScript 3.0 :: Superclass / Subclass Movieclip Linkage
Oct 6, 2010
I have a Hero class that extends a Unit class that extends a SelectableObject class.[code]I have a movieclip in the library that links to the Hero. Inside the movieclip is another movieclip with the instance name "selector".In the Hero I can use selector.gotoAndStop (n) because the movieclip is linked to that class, but I can't do that for the SelectableObject because it's not linked to that.Is there a way to make selector.gotoAndStop (n) work for the SelectableObject? I can't even do var something:* = this.selector because the movieclip isn't linked to it.Or should I just remove the instance name for the selector in the movieclip so I can declare var selector:* = this.getChildAt (1) in the SelectableObject (the selector being the second child)?
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May 8, 2007
1: Is there a way to set superclass variables from within a subclass? I can't seem to accomplish it.
2: Also, why does it seem when I call a function, the superclass version is called instead of the sub? I construct the class using the sub, so whats the matter?
3: In one of the classes, I want to push a MovieClip it creates into an array, it works, but I get an undefined, then the value.
4: I have 3 levels of inheritance in my classes Specials -> Human -> Player, who do i call each one correctly from one another?
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Aug 15, 2010
What I would like to do is to call a method from a superclass in a subclass. Specifically I want to be able to add the subclass as a child of the superclass but without physically having to type addChild in the superclass (but I will have to type it in the subclass). For now I'm just trying to call a method in the superclass that draws some text from a subclass.
Here is the MAIN class (the superclass)
package
{
import flash.display.*;
import flash.events.*;
[Code].....
The code doesn't compile, I get "Call to a possibly undefined method DRAWTEXT through a reference with a static type class".
I realize there are otherways to display text on the screen. I just need to learn how to call superclass methods.
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Jan 3, 2011
For some time now I have been making a very easy game for iPhone in flash using as3. Recently I came in contact with a small problem, which is why I am posting this!
The problem: I have a superclass from which everything derives. In the superclass I initiate and place an Object on stage.
1. var myObject:typeA = new typeA();
2. stage.addChild(myObject);
As you can see this object follows the class 'typeA' which, ocf, has its own actionscript file. Inside of this file I have declared a global variable of type string.
What I want to do is change the varbiable on the new object from the superclass. Therefor I tried as following:
1. myObject.myVariable = 'someSortOfString';
Unfortunatly it didn't work and so I wonder how to do this; change a subclass' variable from the superclass.
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Feb 25, 2011
I have an abstract superclass which has around 300 subclasses. I would like to log when certain methods on this parent are called, and I'd like to know the name of the subclass thats making the call. Is there any way to do this without rewriting all my subclasses to explicitly pass their names upwards to the parent's logging method? E.g., let's say I have a superclass Foo with a method writeLog(str). Foo has a subclass called FooBar, which calls super.writeLog("hello"). Can writelog just inherently figure out that a FooBar called it, without the need to rewrite everything so that we have to call super.writeLog("hello", "FooBar") ???
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Jun 12, 2005
So, how would you create a class that can access a variable in the class where the subClass was created(superclass), I realise this might be unclear so in example
PHP Code:
package {import flash.display.MovieClip;public class Main extends MovieClip {public va demoString:Strin = "TEST";public static var newClass:SubClass;public function
[code].....
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Feb 24, 2012
So, how would you create a class that can access a variable in the class where the subClass was created(superclass), I realise this might be unclear so in example
[Code]...
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May 3, 2010
What passes to a subclass extending from a main or superclass, be it document or extending from a general MovieClip class etc? Does it pass absolutely everything from the superclass? That is to say, instance functions, variables defined inside these functions etc? Or just constructor variables? What passes through and does 'static' affect the transference of these values?
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Sep 3, 2011
I've run into an extremely odd problem. I'll give a code example to start. This is the superclass Building.
Code:
public var allowsEnemyMovement:Boolean = true;
public var information:String = "";
public var buildingName:String ="";
[Code]...
Now here's the odd part. Only SOME of the variables defined in the superclass do this. the variable information, buildingName and health all will take the default value from the super class. But the variable defenseValue will take its value from Factory's constructor. What am I doing wrong here? I would like to keep default values in the superclass so that I don't end up with null pointer errors later just in case.
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Nov 26, 2008
It's early days in my AS3 learning, and I'm looking for a little clarification regarding a variable typed to a superclass (in this case var mySpinner:MovieClip) which contains a reference to an new instance of a subclass (in this case Spinner.) I am trying to get my head around why my code compiles and runs and I am able to call the method rotater() on mySpinner even though mySpinner is typed as MovieClip, and the MovieClip class does not contain the method rotater().
On page 163 of the official Adobe Programming ActionScript 3.0 documentation it says the following, which I believe is related to my situation, but I am still in need of clarification:
"Because each class defines a data type, the use of inheritance creates a special relationship between a base class and a class that extends it. A subclass is guaranteed to possess all the properties of its base class, which means that an instance of a subclass can always be substituted for an instance of the base class."
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Sep 13, 2011
I'm getting
ActionScript Code:
1067: Implicit coercion of a value of type
__AS3__.vec:Vector.ie.aro.floorplanviewer.model.buildingVOs:ConfigurationVO>[code]....
which surprises me as ConfigurationVO inherits from NodeVO.Is the compiler really not able to figure out that a Vector of a superclass should be able to hold a reference to a Vector of a subclass?
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Feb 1, 2011
I have a class called Animal that has a method foo() and I call it out within the Animal class.
Code:
protected function foo():void
{
trace("Animal");
}
I also have a class called Cat that extends Animal and overrides the method foo()
Code:
override protected function foo():void
{
trace("Cat");
}
However when calling the function foo() from the superclass it traces out Animal not Cat (using a Cat object).How can I make superclass call out methods in the subclass?
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Jan 17, 2011
I'm trying to override a subclass's method but I think I need access to the superclass one higher up in the hierarchy. So I'd like to do something like super.super.methodName();
FYI, the actual problem I'm trying to solve should be explained by my code below:
public class A extends UIComponent{
override protected function keyDownHandler(event:KeyboardEvent):void{
super.keyDownHandler(event);
[Code]....
If I use the class A's KeyDownHandler method, you will see that remove() is called regardless. However, the docs state that I need to call UIComponent.keyDownHandler whenever I subclass UIComponent. Of course this works for the first subclass, but not that subclass's subclasses.
I realise that I could put the functionality all into A with something like if(this is B){...} but that seems to me to be a hack.
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May 1, 2011
Can I access a static variable of a subClass' subClass? I don't want to instantiate it, just looking to get the variable because it has already been initialized by the subClass.example:
package
{
public class A extends MovieClip {
private var classB:B = new B();
[code]....
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Oct 16, 2009
Flex complains if I want to create an object from a library symbol with linkage: 1180: Call to a possibly undefined method [linkage name]. So to avoid this, I create a class for that symbol, in this case extending BitmapData using Flex's new ActionScript Class feature. Flex create that class for me and the constructor looks like this: public function CustomBitmapData(width:int, height:int, transparent:Boolean=true, fillColor:uint=null)
[Code]...
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Jan 6, 2009
i have created a rotating menu using xml file for the icons to appear and the code is on a keyframe but nothing on the stage so its talkin to the xml file, but my problem is that i have created movieclip so when i click on a button i want it to take me to the movieclip but i do not know how to do that with code.
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Apr 20, 2010
I'm trying to create a linkage to swap movie clip dynamically. I already create a linkage and after my movie clip symbol actuall say Export: contact_idea. But when I try to attachMovie("contact_idea"). It does nothing. Is there anyway that I can test that the linkage is actuall linked?
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Jul 11, 2010
In my flash document, I have a movieclip drawn on the flash stage (put there myself, not dynamically). I want to use this as a holder for an external .swf. I am using a sub-class to run the loading script. I pass the stage reference to it as the variable "theStage". It has no trouble loading things directly to the stage, but it can't find my movieclip for some reason. I have exported the movieclip for actionscript in the symbol properties panel and have given it an instance name.I've tried theStage.myMovieClip.addChild(mySwf); and suchlike, but always get this error message in output:ReferenceError: Error #1069: Property myMovieClip not found on flash.display.Stage and there is no default value.at MethodInfo-206()Some more information: It works from the main class without any trouble.
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Dec 30, 2008
I'm building a portfolio site for myself. When I load the Thumbnails class directly into the FLA, it works flawlessly. But when I load it into another class as an instance or through extends, nothing shows up. could post the code but there's a lot of it. There must be a very common explanation for this sort of no-show problem, right?this.addChild(thumb);for every dynamic instance loaded and it pulls a trace, but doesn't appear.
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May 10, 2010
I'm building a portfolio site for myself. When I load the Thumbnails class directly into the FLA, it works flawlessly. But when I load it into another class as an instance or through extends, nothing shows up.[code]What's the difference, or what could I be forgetting to type?
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May 10, 2005
How do I reference a library movieclip in a class?I couldn't get it to work entering the name of the class in the linkage properties (as2 class name text field). The variable was undefined.
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Oct 13, 2011
I'm working on a iPad game in Flash Pro CS5.5 and it was compiling correctly. Now I have marked a lot of MovieClip classes for Export for Actionscript so they use a custom MovieClip subclass as base class.
When publishing the movie I get a SWF without any actionscript in it (publishing takes also a lot less time then before). Now I have a suspicion this is because there seems to be a limit on the number of Export for Actionscript you can have?
The problem is that for iPad I can not split my .fla to create multiple swfs; since swfs that you load via the main document can not have any ActionScript in it (I tried already to put all the sounds in a seperate SWF with export for actionscript turned on, that didn't work).
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Mar 14, 2012
In haxe I have a DropDownMenu class that extends MovieClip:
class DropDownMenu extends MovieClip { ...
TextFields are added to DropDownMenus (about 50 TextFields total):
// in a loop in DropDownMenu new method
addChild(myTextField);
When a DropDownMenu is displayed the items further down are hidden as the menu goes off the bottom of the flash player. How can I make these DropDownMenus scroll?
I've considered doing something on the rollout mouse event. However I imagine MovieClip provides some mechanism for scrolling its contents.
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Jul 19, 2006
I am plain stumped. I am working in F8/as2.0.I have a class that extends the MovieClip class. I have a blank_mc in the library that is linked to the class. Here is the constructor:
ActionScript Code:
public function MyMC (target_mc:MovieClip){
var _mc:MovieClip = this;
_mc = target_mc.attachMovie (.....);
}
That works all fine and dandy. Where I am having issues is basically I have properties x, y that DON't overwrite the _mc's _x & _y props. Instead, the use getter & setters that take values and then calculate the needed number to set the actuall _mc._x, _y props. This doesn't seem to work at all and i don't know why. Here is the code:
[Code]
So I got this to work by NOT extending the MC. Instead I have a variable ref to a _mc prop in the class.However I am unable to set event functions to it even if I make some ref to the _mc prop. Is there a good way of approaching this by say a decorator pattern?
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Jul 6, 2009
i have a swf in my library that i want to load to a movieclip... I gave to that same swf the linkage name of: 1
[Code]...
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Mar 14, 2011
how to add multiple instances of a movieclip via it's linkage...
this is the script that adds a single instance to the stage.
code: package
{
import flash.display.MovieClip;
import flash.events.Event;
[Code]....
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Dec 7, 2007
In my project I have to classes that inherit the MovieClip class. Then I create a movie clip and in the library I click on linkage and I set on AS2 class field the name of the first class. Inside this movie a create another movie clip and I set his AS2 class to the second class. The problem is, when I run the file the properties of the nested movie clip are not available for the parent. What a mean is that in the constructor of the first class I cannot acces the methods of the nested movie clip. Somehow I need the nested movie clip to be initialized first and then the parent.
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Jun 25, 2010
I have a movie clip "Obstacle" for a simple game. I have a class for it (Obstacle.as) that creates it, and moves it. In this Obstacle there is a text field - i use it for testing right now.
I want to make another Obstacle (HayBale) - with a subclass (HayBale.as). I have it mostly working. ACCEPT that text field.
It pitches this error:
1152: A conflict exists with inherited definition com.screenscape.game:Obstacle.myDisplay in namespace public.
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Jan 19, 2009
Can anybody tell me why my lb.init(x, y, h, w); call doesnt call! I get no errors yet my output panel only shows.[code]could it be an issue with the cast on lb?this class is for button which i am creating via the createLightButton()Method in another class the button is created init() in not called +NO ERRORS.Ive used an example for Moocks Essential ActionScript ch13 Avatar class to create this class and I can see no reason for it not to work.[code]
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Nov 27, 2009
I designed and added in the library MyMovieClip,then i defined a class MyClass, and set up MyClass as BaseClass of the MyMovieClip.Until here All works fine.Then i started writing MyClass. Pointing the attention on a private varible theMC:MovieClip.i wrote the setting function to link this private variable to a Mclip instance in the stage.[code]The class MyClass must subclass flash.Display.MovieClip since it is linked to a library symbol of that type.
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