ActionScript 3.0 :: Linkage And Inheritance - Movieclips Set To The Corresponding Class?
Jun 4, 2009
I'm creating an isometric game in AS3, Flash CS4.I created a file named Units.as which contains the following:
Code:
package
{
import flash.display.MovieClip;[code]....
The postoffice and cornershop movieclips have been set to the corresponding class names above.The file is in the same folder as the .fla and can be seen in the project window.When I compile, it doesn't include the Units.as file. Even if it just contains:
Code:
package
{
import flash.display.MovieClip;[code]....
if i create a class from the project window and select the movieclip in the library, it does include that file.So I'm assuming the compiler only includes .as files with filenames corresponding to class names.
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Feb 23, 2011
Assume I know practically nothing about AS3! I'm using Flash Pro CS5. I'm trying to reassociate a flash file I've been given with its external assets and classes. In the library I have a movieclip with linkage to a class called 'StaticMap' using the base class 'flash.display.MovieClip'. am I missing a custom class file called 'StaticMap.as' that was originally located in the same folder as the fla, or is this a generic class accessible to all movieClips from within Flash?
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Feb 9, 2010
say that i have a base class called Base, that is Bindable and has a String property like this:
[Bindable]
public class Base
{
public var msg:String;
[Code]......
where msg is some textInput field. I am getting a message from the compiler that....
Data binding will not be able to detect assignments to "msg"
is there a limitation with data binding to a base class?
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Oct 12, 2011
I'm pretty new to fully using class's for my programming (in-frame scripting satisfied me for a while). I am having a problem accessing the properties of a class from another class. The first class (I'll call it controller) receives a reference to an object of another class (I'll call it display). Display have several specialized subclass (I'll call one SequencedDisplay). SequencedDisplay has a timer in it that I need to access:
[Code]...
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Jan 4, 2004
I am using the following code to goto a frame when two movie clips come into contact. I will post the .fla in a second. But, I have a trashcan (object), and a skateboard (container), which i want to decrease the score and show the frames in the framename sketchy.
My problem is that I have a container, which gets different movieclips loaded into it by linkage. I want to use the container as the skateboard, alowing whatever is currently in the container to be what is coming into contact with the trashcan.
[Code]...
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Dec 17, 2006
I have a flash movie with a lot of linked movieclips in my library (mc's with linkage names). I have a preloader in the beginning of the flash movie. However, the preloader doesn't show until (I guess) all those linked movieclips are downloaded first. Then the preloader starts showing, starting at something like 40% . How can I include the linked movieclips in my preloading, such that the preloader shows straight away, from 0% ?
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Sep 7, 2011
if I can do this in as3: I got two "Class"es and I want to know if A:Class is inherited B:Class without instantiat any of them?
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Nov 9, 2010
I am working on inheritance for the first time. Here is the super class
SetBlank.as
Code:
import flash.text.*;
class SetBlank {
public var _textFieldName:TextField;
public var _defaultName:String;
public function SetBlank(textFieldName:TextField, defaultName:String) {
[Code] .....
I can see the trace function working but the method which sets the text field to blank is now working.
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Jun 1, 2009
I have placed a movieClip to the stage and added a linkage class "drag" to it... this class is basically has drag functionality in it the and the drag position is stored in a variable... How can I send the drag position value from my linkage class to the Document class "main"...?
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Jul 7, 2011
It works perfectly in Flash Player 9 but not in FP10. I am calling 5 buttons onto the stage via linkage. These buttons are a movieClip with two frames inside - with different grafics on each frame. I want to use an array to make button 2 and 4 show the second frame in the movieClip. How can I do this! I guess I have to use FP10 since this is a small part of an AIR application. Create a movieClip with to frames, linkagename: radioButton, and why it doesn't work in FP10...
ActionScript Code:
import flash.display.Sprite;
var myArray:Array = new Array;
var box:Sprite = new Sprite;
var count:int = 5;
myArray = ["button1", "button3"];
stage.addChild(box);
[Code] .....
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Jan 30, 2009
example:
Code:
class Dot extends Sprite {
public function Dot():void {
ring.scaleX = 1.0;
[Code]...
If I attach the class Dot to the movie clip everything is fine, but if I attach the class Dottle to the movieclip the pre-export complains saying it can't find 'ring'. however, if I use this['ring'] everything works fine. I understand WHY this is, but I don't know what I should do to make it so it works w/out have to put this[''] around everything.
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Jul 12, 2010
I have a class called BgItem that I want many other classes to extend. But I also want to be able to use instances the BgItem class itself. Within the BgItem class file, I want to be able to detect whether the specific instance is of the BgItem class or an extension of it. I know I can detect if a class is in an object's chain of inheritance using the "is" operator, but how do I detect if a class is at the end of the chain?
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Jul 24, 2010
I'm having trouble accessing the variables of my main class from other class objects UNLESS the objects are extensions of the Sprite or MovieClip class, have been added to the display list as a child of the main class instance, and I am able to use the this.parent.variable syntax. What I'm wondering is, isn't it possible to have a simple Object declared and instantiated, residing in memory and able to access another object's properties, without it being a part of the display list? Am I doing something stupid here?
Let me explain the code a bit in case it's a design flaw on my part. (I'm still learning AS3 and am not completely fluent with it yet).
I have a project with about 15 custom classes. There are no frame scripts in the .fla file. I am using it basically as a library only. The document class (let's call it Calculator for this example) extends the Sprite class and specifies the properties for the SWF dynamically. All other classes are instantiated from this main class. I have a bunch of variables that I want accessible to the different classes, so to keep them in a central location, I have declared them in the Calculator class, and am trying to access them from the other object instances.
(It should be noted that there ARE animations that need to play at times, so I'm assuming I can't NOT extend the MovieClip or Sprite class when creating the document class.
For this example, let's say there's another class called XMLLoader.as, whos instance was created from within the Calculator class, that needs some information stored in the Calculator class' variables. Incredibly simplified code for the two classes might look like this:
Document class:
Code:
package {
import flash.display.*;
public class Calculator extends Sprite {
[Code].....
So, in the code above (I've bolded the most important lines in red), the only way I have been successful at accessing the variables declared in the document class from other classes is to extend the MovieClip or Sprite class when I create the custom class, add the object as a child of the document class (Calculator), create a generic variable cast to the datatype of the document class, and use it to access the variables.
This seems really excessive to me, and I'm wondering if it is, or if this is simply a limitation of ActionScript. Does, for instance, a URLLoader object actually need to be associated with a MovieClip included in the display list in order to access internal variables of the main class object? Is it me, or is that really convoluted? Shouldn't it be able to exist in memory separate of the display list and still have access to varibles declared from the main timeline (i.e. the document class in this case)? Is there no other syntax for accessing these elements? Have I done something limiting with how I've designed this or declared the variables?
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Oct 6, 2011
I am having trouble using inheritance, I made a class called newchars_2 that extends my class newchars and i get this error (newchars class extends movieclip):
1203: No default constructor found in baseclass newchars.
newchars_2.as:
package {
public class newchars_2 extends newchars {
private var obj_no = 3;
public function newchars_2() {
//contructor class
}}}
And when I want to import this class do I import both the class's or just newchars_2 because it has all the functions inherited?
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Jun 3, 2009
Lets say I have the following inheritance hierarchy:
Code:
Select allpackage {
public class ClassA {
protected function foo():void {
// do something
}}} package {
public class ClassB extends ClassA {
[Code] .....
Now this is all well and good, as the call to ClassC.foo() will propogate through the inheritance chain; C > B > A. But what if I want ClassC.foo() to call foo() that is in ClassA and bypass the method call in ClassB? I have tried the following:
* Cast the method to the super-class type I want to execute, but this does not work as intended.
Code: Select all...
override protected function foo():void {
// do something related to Class C
// call ClassA.foo
ClassA(this).foo();
}
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May 5, 2011
I've made it this way1. I made clip and it's main class (eg. timeline.as) - at this point it works2. I put code from main class to another class (eg. timeline_template.as) and in main class (timeline.as) I inherit it by :public dynamic class timeline extends timeline_template {3. I added stage items declarations in timeline_template.as because without that any code couldn't reach target an I got 1120: Access of undefined property xxx after these steps whole clip works but items on stage ( buttons, etc. ) are not affected by code. That's logical because code references to properties declared in timeline_template but not in timeline.fla. But how to get around that - I need several usage of timeline_template and I would like to avoid code redundancy
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Feb 10, 2005
i've got an inheritance chain of AS2 classes set up where i have an array in the 'child' class that i'd like to be able to access from the 'parent' class:
bottomClass.as -'parent'
topClass.as -'child'
my question/dilemma is: how can the parent access the properties of a child class...is this even possible, or am i just looking at it wrong?
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Feb 10, 2005
i've got an inheritance chain of AS2 classes set up where i have an array in the 'child' class that i'd like to be able to access from the 'parent' class:
bottomClass.as -'parent'
topClass.as -'child'
my question/dilemma is: how can the parent access the properties of a child class...is this even possible,
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Aug 4, 2009
I'm having some troubles with the use of interface and inheritance in AS3. I've done lots of OOP in the past and what I'm trying to do seems obvious to me, but doesn't work in AS3. The question is : Is it possible to override a function that return an Object of class A, and make it return an Object of Class B which extends A ? It seems not to be possible, since I'm getting a signature error in Flash, when compiling. For example, the following set of class do not compile (the code in function definition doesn't matter):
[Code].....
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Jul 31, 2009
I don't know how to use Linkage class in library by Document Class.
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Mar 12, 2007
First off, Am i blind or is there no designated flash 9 forum here? There should be. So heres my question. I'm trying to get a MovieClip linked to a class in flash 9.
[Code]...
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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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Mar 29, 2007
I stumbled upon this while trying to customize the tree component following the example on the LiveDocs, see [URL].. To see the problem, do the following:
PART 1:
1) create an empty test.fla file
2) put a tree component on the stage
3) convert it to a symbol named TreeNavMenu, export for
Actionscript as TreeNavMenu
[Code]...
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Jul 15, 2011
i have create game i was in last stage of this game development suddenly error occur that it removes base class of all linkage objects, and if i m trying to put base class of objects(flash.display.MovieClip) then it can't support,
while render flash it shows error Constructor functions must be instance methods.
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Oct 21, 2011
I have a problem with loading SWF and access to their elements by class linkage in Adobe AIR 2.6 for Android.
Problem: I have two different .swf files:
file1.swf (in which MovieClip with name1 has class linkage 'mainScreen')
file2.swf (in which MovieClip with name2 has class linkage 'mainScreen')
They have some action script code, which I need to import in my application domain. Files downloading great. After downloading they are in differen app domains But when I'm getting elements by class linkage and add them to stage - only element which was loaded second is shown. Looks like second movieclip with same class linkage replaces the first one.
For this I'm using such approach:
how can I load two different elements SWF files, which have elements with same class linkage, or explain why I can not do this? When elements have different class linkages - all OK. But!!! It is working for web, but for air it don't want to work.
package
{
import flash.display.*;
[Code]....
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Jul 1, 2009
I have a series of movieClip extension classes that are currently being applied via linkage in the library. I'm trying to find a way to loop the stage at compile and apply the classes to objects with specific instance names instead.
As it is now, if someone duplicates the library instance of a clip on the stage (which happens a lot), it loses the linkage. I could memo the entire dev team and tell them to re-apply the linkage anytime they dupe a clip, but I'd really rather not ask that of everyone...
After exhaustive searching, I'm still coming up with nothing for an actual AS2 solution to this. The only workaround I'm even finding is to create a variable reference to the clip in the class constructor, but I do not want that.
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Dec 7, 2009
[Code]...
So the sound file's name in the Library is "1-welcome.wav", for the Linkage Properties, it is as follows: Class: "mySound", Base class: "flash.media.Sound", Export for ActionScript checked, Export in first frame checked. When i first renamed the Class in he Linkage Property i got: "A definition for this class could not be found in the classpath, so one will be automatically generated in the SWF file upon export."
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Nov 7, 2004
I have a class that has a constructor which accepts some parameters.
Code:
class MyClass {
var myNumber:Number;
function MyClass(number) {
myNumber = number;
}}
Is there a way I can link this to a movieclip and pass the parameter? From what I've found there are two ways to link the class to a movieclip, one using the registerClass and another typing the name intro the Linkage Box in the Library. But in both cases there are no parameters being setup.
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Feb 1, 2009
I have a mc(which has my buttons and instance names) in the library, which I attach to the stage. I've added a faux linkage class as StickyNote. But I'm having issue accessing those button instances so I can add events etc.[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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