ActionScript 3.0 :: Referencing Object On Stage From An External Class?
Sep 6, 2011
I have a media player that I am codging together, one that will play either videos or MP3s depending on the variables it is passed. The video player part works fine. The MP3 player controls are all actual physical MCs on the stage; each one has its own AS class file as part of the package, but there is also a lot of AS that is happening in the main FLA as well. Messy, I know, but it mostly works great.
The MC on the stage in the main FLA is properly linked to the class file via Actionscript linkage, and the control itself works. However, I am trying to make some aspects of the control respond to variables that are set within the AS on the timeline of the main FLA, and I cannot seem to pass values to the control no matter what I do.
[Code]....
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Sep 6, 2011
I have a media player that I am codging together, one that will play either videos or MP3s depending on the variables it is passed. The video player part works fine. The MP3 player controls are all actual physical MCs on the stage; each one has its own AS class file as part of the package, but there is also a lot of AS that is happening in the main FLA as well. Messy, I know, but it mostly works great.The MC on the stage in the main FLA is properly linked to the class file via Actionscript linkage, and the control itself worksHowever, I am trying to make some aspects of the control respond to variables that are set within the AS on the timeline of the main FLA, and I cannot seem to pass values to the control no matter what I do.The following variable is set in the main AS:Code:var notPlayedYet:Boolean = true;I also have some flashVars being passed in from the html, and these I can reference with no trouble from the main AS - the relevant one is:
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Feb 14, 2009
I'm having problems referencing the stage from an external class. I've tried :
Code:
stage.addEventListener(MouseEvent.MOUSE_UP, onUp, false,0,true);
And also
Code:
MovieClip(parent).addEventListener(MouseEvent.MOUSE_DOWN, onDown, false,0,true);
But no luck. Can I not do this? I'm making a pencil class that I want to be able to reuse. I also tried "this" and while it didn't throw and error, it didn't work either.
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Jan 8, 2009
I have a dynamic textfield called neighName on my Flash stage. I also have a movieclip that I call a region on my stage. When I mouseover the region, I want a word to display in a little popup *and* I want some text to display in my textfield. I have an external .as file for handling the region. I can make the code "see" my region, but I can't seem to make it see my textfield, although no errors are being thrown.
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Sep 3, 2009
How to access stage elements from within a class.
buttonControls.as
Code:
package {
import flash.display.Sprite;
public class buttonControls extends Sprite {
// Navigation Hover Color
var hover = "0xF1E960";
var normal = "0xFFFFFF";
public function changeColor(object, color){
[Code] .....
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Jan 7, 2009
I created a custom class in a .as file. I then linked this custom class with a symbol from the library in my .fla file. However, I can't reference stage.stageWidth in my custom class file. I get a null object error.
I think this happens because the custom class file is associated with a symbol on the stage and not the stage itself. For example, if I set the fla file's Document Class to the name of my custom class I can reference stage.stageWidth in the custom class. But I don't do this because I am creating multiple instances of the symbol on the stage. In order to do that properly i found I have to set the class in the properties panel of the symbol to the underlying class which then defines how each symbol behaves.
Under this type of linkage, is there a way to reference the stage width from the class? I've tried root.stage.stageWidth and parent.stage.stageWidth to no avail. I also made sure to import flash.display.* in my custom class. Below is the code for my .fla file and my .as file. In the .as file you'll see the line "x = Math.random() * stage.stageWidth;". This is the line giving me problems. I could hard code it, as I do for the y variable on the next line, but I'd prefer not to in order to keep the code flexible.
[Code]....
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Dec 9, 2009
I'd like to know how I can reference root stage values from within a movieclip, or even worse, from a class. For example, I have a class called Bground.as. It does stuff, according to current stage size - so if someone were to resize the window/browser, Background updates in real time and does something fancy while it's at it. To do this "fancyness", I need stageheight and stagewidth. However, simply pointing to them does not work.
Here's the simplified ActionScript Code:
package klaseFP{
// imports
import flash.events.*;
import flash.display.*;
public class Bground extends MovieClip{
[Code] .....
TypeError: Error #1009: Cannot access a property or method of a null object reference.
at klaseFP::Bground()
at FullScreen_03_fla::MainTimeline/frame1()
Background works as a document class, works perfectly in fact. However, if I use it as the class of a library object, error 1009 shows up. Same thing happens if I simply put the code into the timeline of the library object - stage referencing simply causes it to break. So, how do I dynamically change the values of variables in Background, according to values in the main movie/app?
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Dec 11, 2010
i'd trying to build an interactive tree that allows the user to move the tree's branches and nodes. the lines (branches) of the tree are drawn programmatically between points (nodes and tips). i'd like for the user to click on points to drag them while having connected lines and points move correspondingly. i've gotten this to work to some extent using the code below:
ActionScript Code:
function startMoveOa(evt:MouseEvent):void {
thisPtOa = Sprite(evt.currentTarget);
[code].....
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Feb 1, 2009
and I'm trying to add an event listener and a function to the class, but I keep getting errors of undefined, I tried just about everthing to be able to refference obj0
objGroup.obj0.addEventListener(MouseEvent.CLICK, onClick)
private function onClick (event:MouseEvent):void{
trace ("Click");
}
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Feb 2, 2011
I have this following class attached to some of my buttons to simply control the roll over and out states, as well as the click event. But i want to use the same class on my buttons but would like to control a movieclip outside of the button somewhere else on the stage etc.
put simply: Clicking my button 'moveLeft' will move a movieclip left let say:
[Code]...
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Feb 4, 2012
I think my issue is to do with referencing the stage, but not to sure. When I try
[CODE]...
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Jan 25, 2010
I haven't gotten a handle on coding classes and the appropriate syntax with all the "public" "private" "static" keywords, etc. Anyway, one thing I miss in AS3.0 is having "out-of-the-box" global variables and functions. I've read a lot of forums and articles about making a simple "MyGlobal" class that could hold variables and functions which could be called from the timeline as "MyGlobal.doSomething()" However, I seem to be running into a problem trying to reference "stage" from within one of the global functions... I imagine this is because "stage" is an instance property. I'm basically trying to add/remove an event listener to the stage whenever the global function "MyFunction" is called.
MyGlobal.as:
[Code].....
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Sep 14, 2010
Ok. So heres what I am trying to do. I want one movie clip to follow another one that I move around with actions on the main timeline.The problem is that the follower clip is linked to a class file and I cannot find a way to find the players position.
[Code]...
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Jan 6, 2011
I have created a class, call it Class1, that has various objects drawn on the stage (drawn in the IDE). It also has a function, called setColour, for changing the colour of those objects. The function works fine if I call it from within Class1.
Now I have another class, call it testClass1, that imports Class1 and calls the setColour function. First of all, none of the stage objects from Class1 are visible. Secondly, when setColour tries to modify the colour of an object, I get the error:
TypeError: Error #1009: Cannot access a property or method of a null object reference.
This is the code for testClass1:
ActionScript Code:
package
{
import flash.display.*;
[Code].....
So, what is the problem? Is it possible to change objects that are drawn on the stage of an imported class?
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Aug 2, 2010
The following is that long only because I gave examples of what I want to know, not because it is complex .I have three basic questions regarding AS 3.0 classes.
1. How can I make a class object interact with an object on stage?
For example, when I have a square (mc_Square) with class "square" attached to it and I want it to trace "Colliding!" and print the X and Y of the mc_Box on contact with an on-stage *hollow* box (mc_Box) that has no class attached to it.how to do it vice-versa would also be awesome .
2. How can I make a class object interact with the same class object? For example, when I have two squares (mc_Square) that both have the class "square" attached to it and when they collide, it prints the X and Y of both of them.
3. How can I make a class object interact with a different class object?
For example, when I have two squares mc_Square1 with class "square1 (that also has a variable Primary=true written in it)" and a mc_Square2 with class "square2"; When they collide, the one with Primary=true would be removed and it's X,Y position traced.
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Feb 3, 2009
Ok, this is one of those walls that I know once I can jump over it, I will be a much happier developer again.
I've done tons of reading, and think I have a firm understanding that the general consensus is that if you want to reference something, it needs to be added to the display list, using addChild().
I hate to be defiant, but what if I don't want to?
Or at the very least, what if I want to add a movieclip class to the stage using addChild, and then reference objects inside it?
It is much easier this way than what most people recommend - adding 15 objects via addChild, then setting the x and y for the, etc.
That said, I'm all about using classes and using as3 the way it was meant to be used. So what this is, is a best practices question I guess.
HERE ARE THE STEPS I'M TRYING:
- Create new flash document
- Draw graphic symbol bg, with text field over it, select them, convert to movieclip symbol, and export class name "box", then delete it from stage
- Add document class .as file, which simply adds that class "box" from the library, to the display list using a simple addChild()
- Set a name for that box using box.name = "test" let's say
- Do a simple trace like the following - "getChildByName('test').textFieldName" - it shows up great
- So then, I'll now try to set the text by doing this - getChildByName('test').textFieldName.text = "yo";
That last line above, is what doesn't work. I know I'm referencing wrong, but how would a pro as3 developer, reference something on the stage within a movieclip class, from the document class?
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Nov 21, 2009
I have a custom class which uses some buttons on the stage. Or at least is trying to.say have this code in the customClass.as file
package{
import flash.events.*;
import flash.display.MovieClip
[code].....
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Oct 16, 2010
How you can assign a class to an object on stage.[code]...
This would make a new object, but the current object already exists, it just needs to be notified that it's of the type "ClassName" so it can inherit it's properties.I've also tried assigning the "ClassName" in the linkage as either the base path or the class name. But in either situations I get an error saying that the class needs to be unique when I use the same class on multiple objects.
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Jan 6, 2010
I have a document class called Main, and a class called DispatchEventExample. In DispatchEventExample, I'm trying to add an event listener to the stage but get an 1120 error, access of undefined property stage.
If I understand things correctly, even though I create an instance of DispatchEventExample in Main, it's not added to the display list & therefore cannot access stage.
[Code]...
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Feb 13, 2009
Linking class with stage object..
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Nov 16, 2010
I have a class that have a method to do some work and return a MovieClip. How can I access the stage from the class ? I don't add the class object to stage.
My code is like this :
Code:
import com.ClassName
.
.
.
var c:ClassName= new ClassName();
var mc:MovieClip;
mc = ClassName.create("some parameter");
I want to get access to the stage from ClassName class file.
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Mar 11, 2011
I need to increment an integer variable in a function within the document class upon transpiring event in another class. I can't seem to figure out how to call the function and reference the variable.
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Aug 3, 2009
im still trying to get into the whole oop thing but I still have some things that i dont understand.I have a movieclip on stage that i want to access using an external class that lives in a different folder.Is there a way to access movieclips on stage from external classes or that i have to create a connection between the document class and then send the movieclip instance using a class method ?
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Apr 29, 2011
I tried to change the textfield on the stage from an external class but it doesn't work.Thats the code how I tried it:[code]On my stage I got a textfield wich is dynamically with the instancename: "abc".But everytime I start the program flash tells me stage.getChildByName("abc") would be a null-object.
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Feb 5, 2010
When I debug this, it gives me an error saying that it cannot access the stage because it's a null property.
ActionScript Code:
package {
import flash.display.MovieClip;
import flash.display.Stage;
import flash.text.TextField;
import flash.events.Event;
[Code] .....
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Feb 13, 2009
I've just started using classes while developing my basic platform game in Flash AS3.
On the stage I have a character, instance name 'ball_mc'. I have AS in the time line which controls the characters movements.
I have an external AS file named 'Ground.as' which is basically an ENTERFRAME hittest which stops the character from moving when the character 'hits' the ground.
I have placed a rectangle MC on the stage to represent the ground and linked it to the external AS file 'Ground.as'
The Code for Ground.as is as follows:
package
{
import flash.display.MovieClip;
import flash.events.Event;
[Code]....
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Jun 8, 2011
I've googled this to no avail, I've only found how to manipulate the stage itself and not a display object on it,I have a movie clip on the main timeline with instance name displayName. I created a button that should change what frame displayName goes to (in order to...did you guess it?! diplay the Name of the button.So I am trying to write the code in a reusable fashion and have the buttons all linked to a class called GeoPuzzle. Inside GeoPuzzle I instantiate a touch event and run the code. However, the function has to be able to change displayName in the main part of the timeline and, of course, the compiler says displayName doesn't exist because I'm in a class and I'm talking about the stage.[code]How can I tell displayName to change it's current frame from within display object class?
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Jan 1, 2012
I'm currently trying to add the resulting XML (xmlResult) to a textbox that is on the stage. I did try using MovieClip(root).[instancename].text = ..... however it didn't work - null object reference?
package {
public class ChatHistory extends MovieClip {
public function ChatHistory()
[Code]....
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Feb 4, 2009
I want to rearrange an item on stage when the visitor changes the browser size. The item is initiated in an external class G94Menu:
ActionScript Code:
public function addItem(item:MenuItem):void
{
item.y = (item.height + _spacing) * _items.length;
[code]....
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Oct 11, 2010
I was wondering if there is a simple way to access variables from a class object, where the variables are not actually a part of that class. So if you had an array defined on the first frame of the stage, and added some elements to it, you could use the methods of the custom class to manipulate the array's data.
Stage Frame 1
Code:
var myArray:Array = new Array( "apple", "banana", "pear" );
var myClass:someFunctions = new someFunctions();
myClass.addValue( "orange" );
myClass.sortValues();
[Code] .....
It might not seem logical as to why you would ever want to do that, but it's a very simple example, and it's the means I'm after, not the result. I'm creating a list of functions available to execute by a user via an input field. To keep things simple I made them the methods of a class. The issue, however, is that these methods need to manipulate objects which are on the stage, added and removed by a separate controller class. Passing the objects by reference to the class as a parameter would not be viable with what I'm trying to do either.
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