I am looking at the singleton design pattern and trying to really understand what is going on here. But I have some questions that it would seem my logic and/or the way I am reading this is wrong. Take the following code for example
[Code]...
What's the difference between Extends and Instantiation? It seems like they're both ways of getting content from a class.
View 4 RepliesI'm getting the following error:TypeError: Error #1007: Instantiation attempted on a non-constructor.at Website()[/Design/The Silver Collective/_classes/Website.as:42]
This is line 42:var top = new top();
package {
import flash.display.*;
[code].....
I'm gettnig the following output on the code below - Its driving me mad trying to find th eproblem..
TypeError: Error #1007: Instantiation attempted on a non-constructor.
var nc:NetConnection;var ns:NetStream;
var nsPlayer:NetStream;var vidPlayer:Video;
[code]....
Is it possible to have a string "ClassA" and use it in order to instantiate a real ClassA in my application?
View 4 RepliesI am trying to call a custom component but it keeps telling me this:
TypeError: Error #1007: Instantiation attempted on a non-constructor.
at flexlib.containers::WindowShade/createOrReplaceHeaderButton()[C:UsersuserAdobe Flash Builder 4flexlibsrcflexlibcontainersWindowShade.as:205]
[code].....
What is the difference Between Extends and Instantiation?
View 1 RepliesI wrote a script to make a random image from an array appear and float up through the stage. The problem is that at some random time in the movie, i get the error: TypeError: Error #1007: Instantiation attempted on a non-constructor. at Untitled_fla::MainTimeline/enterFrame() This occurs at random intervals. From that point on, the script stops working. There must be something wrong with the way I generate MCs from the array.[Code]...
View 1 Repliesfirst it might be valuable to mention that i have a one document class and a child of that class, which is the one im having problems with. My library objects is added to the stage perfectly, but after i wrote the last code (in bold), i get:
TypeError: Error #1007: Instantiation attempted on a non-constructor.
at Entity/moveE()
[code]...
I'm building an application where it would be sweet to use dynamic instantiation of Classes.I'm using "flash.utils.getDefinitionByName" to get this done and, if I instantiate the Class in my code once, there is no problem at all.But, I want to be able to do this without instantiating the Class at least once before I go with the getDefinitionByName method.I'm using Flash Develop and the Flex SDK, coding with pure AS3.Is there any way to instantiate the Classes only dynamically?Or, any alternative to the getDefinitionByName method?
View 7 RepliesI've been coding a bunch of movie clips as buttons (gives me more flexibility) and the lines of code is phenomenal... was wondering if i could create a template of functions, and instantiate it for each object?
ActionScript Code:
unimatic.onRollOver = function() {
unimatic.gotoAndPlay(2);
[code].......
I am just trying to explore flash by my own little cognitive thinking..
import flash.events.Event;
var slot:Array = new Array(26);
var letters:Array = ['a','b','c','d','e','f','g','h','i','j','k','l','m ','n','o','p','q','r','s','t','u','v','w','x1','y1 ','z1',"hypen"];
var posx:Number = 125.5;
var posy:Number = -47;
[Code] .....
And the error is pointing in this line of codes:
this[getChildByName(letters[rand]+counter)] = new this["mc_"+(letters[rand])];
I can't understand why should I even use the Singleton pattern in ActionScript 3. Can anyone explain me this? Maybe I just don't understand the purpose of it. I mean how it differs from other patterns? How it works? I checked the PureMVC source and it's full of Singletons. Why are they using them in the View, Module, Controller?
View 2 RepliesIn the Singleton design pattern you can throw a runtime error if the instance has already been created. But this doesn't work when your singleton class extends another class and has to call super() in its constructor, because (for some reason) you cannot call super() if you've already called throw(), or in fact, you cannot compile code that has a potential call to throw() (for example, in an IF statement) that comes BEFORE that call to super().
View 4 Repliesimport flash.events.*;
var cloudInstance:Cloud = new Cloud;
this.cloudInstance.x = this.hero.x;
this.cloudInstance.y = this.hero.y;
[code]....
I instantiate my Cloud class that has that name from the library and exported for AS.I give it the x and y positions of another mc
I found two difference that I feel might be important:
-If I decide to put the variables within a constructor, then I must have an object parameter for any function that wish to alter the variables, even if the code is internal to the class.
-Subclassing would cause the variables to not appear, something that causes problems when the class and any subclasses must have the variables in order to operate properly.
I am instantiating the 'Target' object five times on the stage. This is happening, but only one object is able to have hitTestPoint performed on it. Can anyone help as to why this is happening?[code]
View 1 RepliesI've just migrated to AS3 and am trying to get my head around how to instantiate library symbols as instances of a class.Here's the problem: I'm making a tile-based game with a Map object to which are linked many Tile objects. Now while I initially create blank tiles, I later want to populate them with terrain. This operation will change thus the tile's _terrainType property. Finally, I want to then draw the map consisting of its many tiles. Tiles without a terrain type will remain plain vanilla, but those that have terrain types specified would obviously appear different.
Now the Tile object itself extends Sprite, so it is a DisplayObjectContainer (k, no problems there). My question is, how do I now either a) directly assign it a library symbol graphic,following it's instantiation (if this is even possible?) or b) dynamically use addChild() to add a library symbol graphic of a certain classname (my preferred tactic)? The problem is if I have to do something like this...
Code:
var tileImg:MovieClip = new mountainTerrain();
addChild(tileImg);
then I have to write a bleedin' huge switch() statement to reference a hash table which specifies which terrain type refers to which symbol class type, which is just ugly and crap.The most logical thing to me would seem to be something like this...
Code:
var tileImg:MovieClip = new eval(classname)();
addChild(tileImg);
...but clearly I'm misguided because eval() doesn't even exist in AS3 and I have attempted it's equivalent with no likelihood of success.How do I dynamically add a graphic to represent each instance of my Tile class?
how can i get any classname from a string without instantiation ? [code]
View 1 RepliesWhat is the possibility of a singleton reference to be lost. Well I created a swf singletonpara a store containing some sound features of the software that I created and it's one time or another error saying that the reference is null
View 5 RepliesI have a doubt,.... How would you create a Singleton class in Flex...
Is there any convention like the class name should eb Singleton or it should extend any other class.
How many Singleton class can a project have?
Can anyone say the real time usage of a Singleton class?
I am planning to keep my components label texts in a Singleton class... Is it a good approach.
I have a few classes in my project which aren't display objects, but they need to know about the stage of my project (stage.stageWidth, stage.stageHeight). Is there a simple way to pass this information along to my classes without using a Singleton or passing these items in as parameters into the constructor??
View 3 RepliesIf multiple instances of a singleton are trying to update the same property simultaneously, will there be any conflicts? How does AS3 handle the order?Flash is currently single-threaded.. will the write order be an issue when it becomes multi-threaded?
View 3 RepliesThe use I have for it is for storing user credentials, and calling a transfer object that functions as a sort of "cache" for the current session in all of the flex modules.
Thinking about objects that have to be present in every module. Is there any alternative to a singleton instance for this?
I'm storing my model data in a Singleton called ModelLocator. This is pretty common...
Can I look at this data in the debugger?
[Edited - Title changed]
How can I define my own global function which will be accessible throughout the whole package or better, program? Alternatively, how can I define a singleton object? Should I use static?
View 3 RepliesI'm trying to do singleton movieclip from library, but can't get it work, how should I proceed?[code]1136: Incorrect number of arguments.Expected 1.And it is refering to the MyMovieClip.as file, to the line where I have "_myMovie = new MyMovie();".
View 6 RepliesI'm trying to load swf from 127.0.0.1 into my main.swf with Flash Pro
Both swfs have Singlenton class
How to make it that loaded swf use Singlenton of main.swf ?
I did
ActionScript Code:
var lc:LoaderContext = new LoaderContext();
lc.applicationDomain = ApplicationDomain.currentDomain;
myLoader.load( new URLRequest("http/127.0.0.1/loaded.swf"),lc);
anyway I have 2 different Singlenton classes one comes with loaded.swf another in main.swf and variables not shared
is any way I can merge this values?
a little foggy on passing variables to the Constructor from a Singleton instance. Could someone enlighten?
From timeline:
Code:
var c:Calculator = Calculator.getInstance(5,20,30);
[Code]...
I am trying to create a singleton class, that extends Sprite. It seems to work correctly, but it doesn't actually update the screen.If I access my instance and change the properties (x,y,alpha,etc) they will all update, but the display doesn't change.eg:My clip starts at x=0.MyClass.getInstance().x = 99;trace(MyClass.getInstance.x); //traces 99, but it still appears at 0 on the screen.
View 7 Replies
