I use this pattern to test for undefined and null values in ActionScript/Flex :
if(obj) {
execute()
}
Unfortunately, a ReferenceError is always thrown when I use the pattern to test for child objects :
if(obj.child) {
execute()
}
ReferenceError: Error #1069: Property child not found on obj and there is no default value.Why does testing for child objects with if statements throw a ReferenceError?
I have a flex application with two objects: a parent widget (called an IBaseWidget) and a child widget (called a HelperWidget2).When the user clicks on a help link, a helper widget is loaded into the list of base widgets and then displayed for the user.However, when I try to access this child widget by casting the base widget in the collection to the child widget type,the child widget returns null and I am unable to work with the widget.The following snippet correctly returns the widget ID of the newly added widget and dispatches an event to load the widget:
var id:Number = WidgetManager.getInstance().getWidgetId("Helper");
ViewerContainer.dispatchEvent(new AppEvent(AppEvent.WIDGET_RUN, id, openQuickQueryCanvas));[code].........
The problem is that helperWidget above always returns null, meaning the cast isn't successful.
We are trying to automate our flex application. After adding automation libraries to our project we get the following exception:
TypeError: Error #1009: Cannot access a property or method of a null object reference.
at mx.automation::AutomationManager$/addDelegates()
at mx.automation::AutomationManager$/addDelegates()
at mx.automation::AutomationManager$/addDelegates()
[code].....
We are using Flex 3.4 and maven2 to build the application.
I have an Movie Clip in Flash that have subobject of button type which has subobject of input text and movie clips. Right after creation core Moveclip all subobject are set to null, when I expect them to be valid objects.
[Code]...
MC_Core_design was created in Flash and exported to Actionscript. I've done this for button_1 class aswell. The code was written using Flex. When I comment out both lines that result in error I get correct view of the core Movie clip with all subobject. How can I set subobject properties right after object creation?
i have problem with swfLoader in flex, when i close following code in click method i can easly add many swf to main application
<mx:VBox id="content" width="100%" height="100%" ></mx:VBox>
public function doIT():void
{[code]....
when i close adding those swfs in loop i have the same error, it looks like child apps couldn't access certain objects that were instantiated by another child app, so what can i do?
I am using Flex AS3, i have a accordian with two tabs each tab contains some text boxes and i am trying to access these child controls from button event handler which resides outside the accordian, Problem is these controls are null until i open the tabs of accordian.
View 2 Repliessometimes I remove child and trace it afterwards and it outputs null although I havent yet set it to null, why is that? and do I need to set it to null also in that case?
Code:
trace(holderArr[loadedThumbs].getChildByName("photo_bg"));
//[object MovieClip]
holderArr[loadedThumbs].removeChild(holderArr[loadedThumbs].getChildByName("photo_bg"));
[Code]....
a quick low down would be its a gallery on the second frame and I breaks when coming back tot he first frame, all tweens die and such.
the errors are:
TypeError: Error #2007: Parameter child must be non-null.
at flash.display:isplayObjectContainer/removeChild()
at index_779_fla::MainTimeline/imageLoaded()
[code]....
I have an array of temporary objects created in a for loop. The objects are of type class "Tile", a class I created. However, it appears that whenever I create a lot of tiles in the for loop, the program slows down indefinitely.
While the array is whiped at a later trigger point, I am thinking that perhaps these Tile objects are not being erased from memory. They are being created on the fly in a for loop, and the array is being reset to "array = []".
Are the objects still in memory or are they cleaned up when the array is set to []?
I'm having a serious problem with looping through an array. I'm trying to hitTestObject every MC in an array against every other MC in that array.The issue is that in my hitTestObject statement, if obviously looks at only 2 elements at a time.When 2 MC's touch, I set a property called "Touching" to true.The problem is these are moving MCs and at any given time only 2 out of 3 are touching.So what's happening is:The loop runs once testing Array[0] and Array[1].Say those are touching.It sets their "Touching" properties to true(thats what I want).THEN, it runs again testing Array[1] and Array[2], and finds that they are NOT overlapping.It this process it sets both of their "Touching" properties to false, EVEN THOUGH one of them may be overlapping a different array object.I want to individual set the "Touching" property for each array object.Right now these properties are getting overwritten even though 2 out of 3 objects are actually overlapping.[code]
View 4 RepliesI am making a simulation that involves particles dynamically added to the stage (lots of circles). When these circles collide (which are actually movieclips) they need to rebound (momentum switched). I have no problem with the physics but do not know how to efficiently check for collisions. It boils down to being able to 1) Check if a particle is colliding and 2) Getting which other particle (object) is involved in the collision?
I would ideally like particles to be able to check for their own collisions and adjust their own momentum, not just some meaty Render() function running on every frame. How could this be done?
my following code gave me TypeError: Error #2007: Parameter child must be non-null runtime error.
[Code]...
Is there a method for testing when a shared object has finished loading?because as you can see i have a considerable amount of variables to load, and they don't always load in time.causing many glitches.
ActionScript Code:
wep=saves.data.wep;
backupwep=saves.data.backupwep;
[code]......
I'm writing a general physics engine and I've come across the problem I've always had with flash. So far all my hittests in my physics engine have been calculated by using x/y coordinates and the 2 objects dimensions. This has worked fine for the objects so far because they have been very square-ish and do not rotated. How ever now I am trying to detect if 2 rotated objects are hitting. How can I do this ? I would really like to avoid using any .hitTest() functions.
View 5 RepliesI have a new flash with several objects(classes) created in as3.They are called Ball1,Ball2,Ball3 and are of type Ball.I wish to be able to insert them into an array and have the array loop test them all against each other like eg. array[i].interact(array[i+1]) and so forthAdditional things I'ld like are:Making sure an object isnt tested against itself,removing objects from an array.sorting the array(if neccessary).adding new objects to the array
View 10 RepliesI'm trying to create a sort of tree diagram such that, if you click on one of the circles, its child circles spread outward with some degree of randomness from the original circle, connected by lines. I have this working, but now what I want to do is make sure that none of the circles collide with each other and none of the lines criss cross. You can see the screenshot for what is currently happening. My code is below. How do I change this code so that it checks for collisions and avoids them? I've read up on flash's hitTestObject command, but that only works in the context one object to another. I want to test for one object contacting any display object.
import com.greensock.TweenMax;
var sw = stage.stageWidth;
var sh = stage.stageHeight;
[Code].....
I need to know if Null is the same as Undefined and then, is it the same in AS2 as it is in AS3?According to the help files in CS3:
Null: A special value that can be assigned to variables or returned by a function if no data was provided
Undefined: A special value, usually used to indicate that a variable has not yet been assigned a value.
I have a component "child" which has a cancel button. Now this component is placed in a state called "newChildComp" I also have another component called "parent". In the parent component, i have a button that dispatches an event. Here is the event code:
[Code].....
so, basically,i am checking to see if the cancel button component in the Child component, while i am still in the parent Compoent, was clicked, if it was clicked, call the cancelButtonHandler. The problem is by the time the addNewChild handles the event, that cancel button was still null. My question is how do i solve this without using the itemCreationPolicy on the cancel button?
If I parse an XML element with a null or undefined result, is it possible to display a blank text field rather than "null" or "undefined" in the field? It seems really basic but I'm drawing a huge blank.XML
Code:
<content>
<item></item>
[code].....
In ActionScript 1 and 2, if you compare undefined, null or NaN with an arbitrary number using >= or <= operator, the result is always true. Test code:
var x, n, range = 1000;
for (var i = 0; i < 3; ++i) {
switch (i) {
case 0:
x = undefined;
[Code] .....
Furthermore, isNaN(null) return true. These are contrary to JavaScript and may not conform with ECMA standard.
I am creating Dynamic Destinations
MessageBroker broker = MessageBroker.getMessageBroker(null);
MessageService service = (MessageService) broker.getService("message-service");
MessageDestination destination = (MessageDestination) service.createDestination("Group1");
[code].....
But I am getting Null Pointer Exception
MessageBroker broker = MessageBroker.getMessageBroker(null);
I have create a menu but when clicking on menu so that it shows, I get an error on the line because of the line "myMenu.show(null,null)". See function below:
private function createAndShowmyMenu():void {
myMenu = Menu.createMenu(null, myMenuDataProvider, false);
myMenu.labelField="@label"[code]........
[code]...
and I dont mean this: (which removes the parent)
How can I determine if a child is present or not in a movieClip?
I'm trying to set up a conditional to determine whether or not a specified child object is present and if so, remove it. I'm having trouble finding relevant documentation on this.
I've having a problem when I am removing a child. There is an area where you can choose a button to click(there are multiple buttons here). Once you click a button it loads workss_mc and you can go back from there and workss_mc is being removed then work_mc is being added again. The problem is once it is added again and you click on any of the other buttons the frame label from the previous session when it was clicked is still at that location.
[Code]....
i have a movieclip called hero, which on every frame has a movieclip called 'mc', which in every frame has a mc called 'sword'problem is, on the first frame after i change frame (like from the idle animation to attack) 'mc' traces null, so i cant access 'sword' either, which is a bit of a problem for the design of the game...the frame after i change tho, 'mc' and 'sword' can both be accessed fine.
View 14 RepliesOne of my menu item button functions has the following code:
Code:
if (DisplayObjectContainer(parent).contains(parent.getChildByName('newMC'))) {
parent.removeChild(newMC);
[code]......
i have an external class that creates an instance named mc. then mc.addEventListener(MouseEvent.MOUSE_DOWN, drag); in function drag, if i try: addChild(mc); it works fine but when i try: addChild(e.target as MovieClip); i get the error
View 4 RepliesI basically need to scale an object up when the user rollsover the button which I have created dynamically already and I need to make sure the object is fully scaled up before I can allow the user to scale it back down again.Ive tried putting 2 tweens (x and yscale) into a function but not sure how to check if the tweens have finished. Im assuming if I check the function is complete it wont take into consideration the tweens may still be running.
View 0 RepliesI am building a shoppin cart in flash and I am having a problem getting the purchase items list to work. Each item which gets added to the cart gets put into a movie clip and added into a purchased items moveClip which is on the stage. Each child item has a remove button attached to it. So if the user wants to remove the item they can. The problem is when I remove some of the items on the list I get a "Error: Parameter child must be non-null." Here is the code aswell:
//The cart_array is where I want to store incoming items in.
var cart_array:Array = new Array();
//The items_array is where I want to store the "purchased_mc" MovieClips inside once they have been put on the stage.
var items_array:Array;[code]...........