Actionscript 3 :: Flex 4: Can't Define S:layout For Subclasses Of Classes Extending Group?
Sep 9, 2011
I'm trying to create a base class for components by extending Group in Flex 4, but I can't seem to define the layout through MXML. Any time I try to move the definition to a subclass of my base component, I get the following error:
Error: Could not resolve <s:layout> to a component implementation.
Judging by that error, it seems that some magic from the framework's side goes into assigning it for a Group and thus the compiler fails when trying to assign it for any other classes. Does anyone know how this is supposed to work? how to allow me to define it in subclasses?
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Jan 5, 2010
how subclasses, instances, and inheritance work. The below code isn't actual project code, it's theoretical code, generalized to a simplistic level so that we can talk about the big issues. I have animals_app.fla, with a "Dog" class MC and a "Cat" class MC. Both "Dog" and "Cat" are subclasses of "Animals"; animals_app.fla uses document class "Main".
Intuitively,I think Animals should declare that every subclass should have some animalSpecies ,and each subclass will define the value of its own animalSpecies. It wouldn't make sense for Animals to provide any default value, because it will always be different per subclass.Is this correct?
I had tried out some code similar to that below, and was perplexed because it seemed like whenever a subclass tried to define a value for its own animalSpecies variable, it was actually changing the value of the variable in the Animal class, but that's not what I want. How do I rewrite this code so that each subclass defines the values of variables it inherits from its superclass, without altering the superclass? And how would I define the value of variables for each instance of a class, so that I'm only changing the values of that instance, without altering the subclass?
Animals.as
package
{import flash.display.MovieClip;[code]..........
Also, conventionally, what should be in my Main class? Only the addChild code which attaches MCs to the stage? Or should the values of variables be defined in Main? What am I missing?I recently read Foundation Game Design with Flash and didn't feel like the explanation was sufficient.
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Jan 5, 2010
I'm trying to figure out how subclasses, instances, and inheritance work. The below code isn't actual project code, it's theoretical code, generalized to a simplistic level so that we can talk about the big issues.
Let's say I have animals_app.fla, with a "Dog" class MC and a "Cat" class MC. Both "Dog" and "Cat" are subclasses of "Animals"; animals_app.fla uses document class "Main".Intuitively, I think Animals should declare that every subclass should have some animalSpecies, and each subclass will define the value of its own animalSpecies. It wouldn't make sense for Animals to provide any default value, because it will always be different per subclass. Is this correct?
I had tried out some code similar to that below, and was perplexed because it seemed like whenever a subclass tried to define a value for its own animalSpecies variable, it was actually changing the value of the variable in the Animal class, but that's not what I want. How do I rewrite this code so that each subclass defines the values of variables it inherits from its superclass, without altering the superclass? And how would I define the value of variables for each instance of a class, so that I'm only changing the values of that instance, without altering the subclass?
Animals.as
package { import flash.display.MovieClip; public class Animals extends MovieClip { public static var animalSpecies:String; public function Animals() {} }}
Dog.as
[code]....
I recently read Foundation Game Design with Flash and didn't feel like the explanation was sufficient. I've tried scouring the web for OOP tutorials, but they're either too basic or too far over my head. Can someone please explain where I should be defining values of variables for classes, subclasses, and instances?
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Jan 5, 2010
I'm an AS3 newbie and I'm trying to figure out how subclasses, instances, and inheritance work. The below code isn't actual project code, it's theoretical code, generalized to a simplistic level so that we can talk about the big issues.Let's say I have animals_app.fla, with a "Dog" class MC and a "Cat" class MC. Both "Dog" and "Cat" are subclasses of "Animals"; animals_app.fla uses document class "Main".
Intuitively, I think Animals should declare that every subclass should have some animalSpecies, and each subclass will define the value of its own animalSpecies. It wouldn't make sense for Animals to provide any default value, because it will always be different per subclass. Is this correct? I had tried out some code similar to that below, and was perplexed because it seemed like whenever a subclass tried to define a value for its own animalSpecies variable, it was actually changing the value of the variable in the Animal class, but that's not what I want. How do I rewrite this code so that each subclass defines the values of variables it inherits from its superclass, without altering the superclass? And how would I define the value of variables for each instance of a class, so that I'm only changing the values of that instance, without altering the subclass?
Animals.as
Code:
package
{
import flash.display.MovieClip;[code]...
I recently read Foundation Game Design with Flash and didn't feel like the explanation was sufficient. I've tried scouring the web for OOP tutorials, but they're either too basic or too far over my head. Can someone please explain where I should be defining values of variables for classes, subclasses, and instances?
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Jul 16, 2010
I'm creating a class that extends another class.
public class ASClass extends UIComponent{
}
but I'm trying to make it extend multiple classes. Is this somehow possible? I read it may be possible through composition?
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Jan 5, 2010
how subclasses,instances,and inheritance work. The below code isn't actual project code, it's theoretical code, generalized to a simplistic level so that we can talk about the big issues.Let's say I have animals_app.fla, with a "Dog" class MC and a "Cat" class MC. Both "Dog" and "Cat" are subclasses of "Animals"; animals_app.fla uses document class "Main".
Intuitively, I think Animals should declare that every subclass should have some animalSpecies, and each subclass will define the value of its own animalSpecies. It wouldn't make sense for Animals to provide any default value, because it will always be different per subclass. Is this correct? I had tried out some code similar to that below, and was perplexed because it seemed like whenever a subclass tried to define a value for its own animalSpecies variable, it was actually changing the value of the variable in the Animal class, but that's not what I want. How do I rewrite this code so that each subclass defines the values of variables it inherits from its superclass, without altering the superclass? And how would I define the value of variables for each instance of a class, so that I'm only changing the values of that instance, without altering the subclass?
Animals.as
Code:
package
{
import flash.display.MovieClip;[code]..........
Also, conventionally, what should be in my Main class? Only the addChild code which attaches MCs to the stage? Or should the values of variables be defined in Main? What am I missing? I recently read Foundation Game Design with Flash and didn't feel like the explanation was sufficient. I've tried scouring the web for OOP tutorials, but they're either too basic or too far over my head.where I should be defining values of variables for classes, subclasses, and instances?
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Dec 10, 2009
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[Code]....
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Say I have a document class called index, where I set up some variables and methods and include a class.
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at com::index/initIndex()
at com::index()
[Code]...
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Oct 30, 2006
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error report:
Code:
verify PointAirFri$iinit()
stack:
scope: [global Object$ Point$ PointAirFri$]
locals: PointAirFri Number Number Number
0:getlocal0
stack: PointAirFri
scope: [global Object$ Point$ PointAirFri$]
locals: PointAirFri Number Number Number
1:pushundefined
stack: PointAirFri void?
scope: [global Object$ Point$ PointAirFri$]
locals: PointAirFri Number Number Number
2:setslot 14
stack:
scope: [global Object$ Point$ PointAirFri$]
locals: PointAirFri Number Number Number
4:abs_jump 78424138 45
stack:
scope: [global Object$ Point$ PointAirFri$]
locals: PointAirFri Number Number Number
0:getlocal0
stack: PointAirFri
scope: [global Object$ Point$ PointAirFri$]
locals: PointAirFri Number Number Number
1:pushscope
stack:
scope: [global Object$ Point$ PointAirFri$] PointAirFri
locals: PointAirFri Number Number Number
2:getlocal0
stack: PointAirFri
scope: [global Object$ Point$ PointAirFri$] PointAirFri
locals: PointAirFri Number Number Number
3:constructsuper 0
VerifyError: Error #1063: Argument count mismatch on Point$iinit(). Expected 3, got 0.
at PointAirFri$iinit()
at docClass/::init()
at docClass$iinit()
this is how the defined the classes:
Code:
package{
public class Point
{
vars
public function verlet(a)
{
code
}
public function savePoint()
{;
code
}
public function restore()
{
code
}
public function Point(__x:Number, __y:Number, __fr:Number)
{
x = __x;
y = __y;
dx = 0;
dy = 0;
vx = 0;
vy = 0;
friction = __fr;
}
}
}
package{
import Point;
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{
private var airFriction;
public override function verlet (a)
{
code
}
public function PointAirFri(__x:Number, __y:Number, __afr:Number)
{
x = __x;
y = __y;
dx = 0;
dy = 0;
vx = 0;
vy = 0;
airFriction=__afr;
}
}
}
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[Code]....
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Code:
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if (stage) {
init();// stage accessible, call init function[code]....
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public class Test
{
public function Test():void
{
[Code]....
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Code:
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[Code]....
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[code]....
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<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"[code]....
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[Code].....
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[Code]...
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[Code]...
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