ActionScript 3.0 :: Use Super() In A Handler Function?
Dec 28, 2011
I'm trying to make a CustomLoader class that extends another class.In the contructor of my CustomLoader, i need to call super(myLoader:Loader) where myLoader is a Loader object. Problem is I need to listen to the complete event of the loader before passing it or i'll get an "Error #1009: Cannot access a property or method of a null object reference". but if i put super() in a handler function i get an "Error 1007: A super statement can be used only inside class instance constructors."
Here's part of my code:
Code:
public class CustomLoader extends ParentClass
{
...
public function CustomLoader():void
Is it possible to call a method in the super class of a super class? I tried the above and it doesn't work, unsurprisingly. Only way I've been able to do it is to store a reference to a super.someMethod in the super Class (eg. var superMethod: Function = super.someMethod) and call that instead. Seems reasonable and it works but wonder if there is an in-built method for doing this?
I am trying to create a spark datagrid item renderer. This item renderer extends a checkbox, and implements IGridItemRenderer public class CellCheckBoxItemRenderer extends CheckBox implements IGridItemRenderer
When I implement IGridItemRenderer, I need to implement the interface methods, I am having a problem with the following methods:
i got a class(class1) that extends another class (class2)...when something happens in super class, i need to update the class1, soi need to trigger a function in class1 from class2... I know is bad programming, but is that possible? I'm confused
Say I have a class B that extends class A.In class A, I have a variable that I've declared to be a function, which gets defined in the constructor. Now, in class B, is there any way to reference that function with the use of super.functionName()?
I am trying to extend the new AutoComplete component from Adobe. In two different places I need to bypass the AutoComplete methods and get right at the ComboBox methods.
I was told that super.super.someMethod() works just like it does in Java. But I keep getting Compiler errors:1084: Syntax error: expecting identifier before super.Any suggestions other than just cutting and pasting the code and extending the AutoComplete superClass?
I need to return to my original function after capturing an event (downloading something) with another function. The original function needs to return a value, which depends on the downloaded data. So, I'd like to pause original function for the time needed for the download and the eventhandler function to complete it's work, and resume it afterwards.
The obvious way is to set a flag value (both the original function and the eventhandler are within the same class) and make the original function check it until the eventhandler function changes the flag. But that would be wasteful, and my AS is slow enough already:) [other parts of the application utilise some heavy graphics]. Is there another way? Like an event that gets captured "in the middle" of the function? Or some other form of flow control?
public class Example { public function Example () { }[code]............
You can see that the two last classes extend the first one, and both have the 'variable' property. In case that I have an instance of Example and I am sure it is also an ExtendedExample OR AnotherExtendedExample instance, is there some way to access the 'variable' property? Something like
function functionThatReceivesAnExtendedExample (ex:Example):void { if(some condition that I may need) { ex.func()
Is there a way to get the handler(s) function(s) of an event listener?
I'm trying to find a way to remove them without knowing what they are.
For example:
ActionScript Code: if (mc.hasEventListener(MouseEvent.CLICK)){ // this object has a MouseEvent.CLICK listener mc.removeEventListener(MouseEvent.CLICK, null ); }
Instead of null, I was hoping to find some function that retrieves the handler function.
If I run add('movie123'). How do I get the string 'movie123' in the enter_frame_handler function? UPDATE This forum post (Click Here) describes the issues I am having but doesn't provide the solution I am looking for. Luckily @kapep provided a simple solution that solved the issue.
I'm trying to start a function from within a click handler that is being triggered when I load some XML, just like this:
Code: function LoadSomeXML(e:Event):void { thumbContainer_mc.addEventListener(MouseEvent.CLICK, thumbClick); } function thumbClick(event:MouseEvent):void { startImgSlider(); } function startImgSlider():void { trace("ok, now you reached 'startImgSlider()' function !!!"); }
The problem is that I cannot reach the startImgSlider() function with the code above. How to do it right. Has something to do with the scopes?
I am having problems with a ChangeWatcher.Everything seems to be set up correctly.The canWatch method returns true, the isWatching method returns true and if I query the return value of the getValue method I get the correct information, including changes. But for some reason the handler function just doesn't fire.
I'm trying to add a custom callback handler to a NetStream client in a p2p application. The problem is, when I add such a handler, the NetStream Client doesn't function as it did before. It seems the NetStream.client object is changed. I know the default object is this. But changing the client to this doesn't solve the problem.The remoteControlStream, is the incoming stream. And the localControl stream is the stream being publishedThis is the localControlStream that's being send by the peer, and received as remoteControlStream:
private function initLocalControlStream():void{ localControlStream = new NetStream(nc, NetStream.DIRECT_CONNECTIONS); localControlStream.addEventListener(NetStatusEvent.NET_STATUS, localControlHandler); localControlStream.publish(myPeerID+"control");[code]...
The onPeerConnect method of the localControlStream doesn't get called when I connect when the above handler is added. When I remove the that handler, the onPeerConnect method gets called.
I've created a button (type: MyButton) with two child, a text (TextField) and a image icon (type: MyIcon). Then I've append an eventlistener mouse_click on my button. As soon as I click on the text, the e.target on the handeler function is recognized of MyButton type. Otherwise, if I click on the image icon (child of button) the e.target is MyIcon type, instead of MyButton. How can I prevent this? I need all click to be recorded on the button, where I've stored some attributes I need on handler function.
I want to call the same event handler function with a click and also with a custom event. the problem is the event type that needs to be passed to the function. Is there are generic event type that can be used to call the function from both places?
Code: menuBtn.addEventListener(MouseEvent.CLICK, menuOpen ); function menuOpen(event:MouseEvent){
Ok, I have 2 buttons on the stage. Each button does almost the same thing, so I want to create a single function, and each button calls that same function (we'll name that function "Navigate")... however, the function will need to end up doing something different dependant on which button was clicked.So, previously, in AS2, I would've added some code onto the buttons themselves with on(release) methods, like so:
Code: // Define the Navigate function function Navigate(myLabel){
Trying to migrate my way of thinking from AS2 to CS4/AS3. Ok, I have 2 buttons on the stage. Each button does almost the same thing, so I want to create a single function, and each button calls that same function (we'll name that function "Navigate")... however, the function will need to end up doing something different dependant on which button was clicked. So, previously, in AS2, I would've added some code onto the buttons themselves with on(release) methods (see CODE EXAMPLE 1) So, each button effectively calls the Navigate function, and passes a different frame label to the function. Now, I'm trying to recreate this functionality in AS3. As you all know, on(release) has been done away with (still don't know why), but we now have to use event handlers, so I'm trying to figure out a way to pass a different frame label argument to the Navigate function. Currently I can achieve that by using a switch statement to test which button was clicked, and act accordingly (see CODE EXAMPLE 2).
I've coded this small snippet to show what I'm not understanding:
[Code]...
Shouldn't I be able to read loaderInfo inside the creationComplete handler? I'm trying to pass a string from the html to my flash component, that's why I have to get loaderInfo working.
I created an array with movie clips now how can i target one movie clip with event handler function . so that when i clicked on one movie clip a message should be displayed
I have an action listener :myText.addEventListener(TextEvent.LINK,linkClickHandler); As according to this, i need to write an event handler function seperate to handle the text link event.Now my requirement is i need to write that function in the same line isntead of giving its name.ie, something like mytext.addEventListenet(TextEvent.LINK, function(event: TextEvent) {....code comes here....});
can i do like this in AS3.What will the syntax for this if possible.Also i want to know, wether i can pass one more extra param to the event handler other than event which is the default parameter.
whenever I try to call the removeMovieClip function in a callback handler, it just doesn't work! Maybe I'm tired, or I've just missed something this is apparantly obvious. In my code exert below, is just a simple script that attaches a movie clip to stage (square_mc) and creates a duplicate instance. When the component button is clicked, I want the original movie clip to be deleted, but nothing happens!
Code: this.attachMovie("square", "square_mc", this.getNextHighestDepth()); square_mc.duplicateMovieClip("square_mc2", this.getNextHighestDepth(), {_x:50}) var listener:Object = new Object;[code].............
I have a button labeled 'blueButton' and I'd like to use an anonymous function to handle the click, like so:
blueButton.addEventListener(MouseEvent.CLICK, function(event:MouseEvent):void { trace( "-----click detected-----" ); // now do other stuff });
Problem is, the click handler is called multiple times per click. The number of times called seems to be random (sometimes 2, sometimes 4, sometimes 3 etc). could I be missing something in my code, or maybe I set up the button wrong?
also I noticed that it seems to always get called once on the first click. After the first click is when it starts getting called additional times, maybe that has something to do with it?
Code: **Error** C:Documents and SettingsMetjuDesktop\_GENERAL FLASHflashcommetjuphysicsVector.as: Line 41: There is no method with the name 'super'. super ( x, y );
[code]...
I tried clearing the ASO files a thousand times, restart flash, resave the Vector.as file and still nothing.
If a constructor takes its parameters as a vararg (...) it seems to be impossible to create a subclass that will just pass on that vararg to the superclass.
There is a related question with fix for this same situation for normal functions: Wrapping a Vararg Method in ActionScipt but I cannot get that to work with a super call.
base class:
public class Bla { public function Bla(...rest) {
[Code]....
Aside from actually moving the handling of the parameters to the subclass or shifting it off to a separate initializer method
When invoking super() in my subclass, I can pass uints and strings as params to super, but passing a TextField instance that is on the stage of the library instance of the subclass fails. Why? Is there a workaround?
