Flash :: AS3 - Give DisplayObjects Custom Properties?
Oct 10, 2010
I am very new to AS3, and I'm confused about how things that would have been simple in AS2 are so complex and tricky now. For example, I want to create a bunch TextField objects that, for some reason, rise up every frame (as in : object.y-=1; ).However, I also need each TextField to reference the TextField that was created just before it.
I tried creating a variable that would hold such a reference : ThisTextField.Ref=LastTextField; but - this returns an "Access of possibly undefined property..." error. It seems I can only have custom properties on mere Objects ! This is annoying because an Object doesn't seem to accept event listeners (remember, I need them to do something every frame). Is there a way to simply set custom properties on my TextFields, without having to use custom packages ? Or is there a way to use event listeners on Objects ? I've read something about strict mode which could allow setting properties on other objects - what are the risks of turning it off ?
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Mar 18, 2011
ActionScript Code:
private function drawMap(tile1:DisplayObject, tile2:DisplayObject):void
{
var _tile1 = tile1;
[Code].....
The idea behind this is to store custom sprites in an array and then feed the array to the drawMap function, which would use the sprites from the array to draw a map.
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Jan 14, 2009
I am currently building a site with AS3 and have run into a small problem. I Have my Main swf which is the site. Inside that I have a "gallery" which is full of buttons. I have it set up so when you click a button to view a image it loads a separate smaller swf on top of the main swf. What I would like to do is be able to have the smaller swf open in the middle of the main swf and be able to drag it around. How would I go about controlling a swf inside a swf?
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Apr 17, 2011
I have some movieclips in my flash proyect, and I want these have the properties and behaviors of buttons, for example to make links with other frames.
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Aug 26, 2011
Given this:public namespace foo;foo var bar:String = "baz";We can access the property "bar" like so:[code]It gives me the following error: ReferenceError: Error #1069: Property foo::bar not found on MyClass and there is no default value.On further inspection of the foo namespace I can see (in the debugger) that the URI is in the format {package}:{type}/{name}. If I try to replicate this by doing the following:[code]Does anyone know if it is possible to get access to namespaced members like this? I don't have compile time access to the namespace, but I can look up it's uri (and prefix) dynamically at run time.
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Sep 7, 2010
I'm trying to pass some properties to a component I've created in Flash Builder 4. In my example below I want to pass the "label" property to update the label property of the Button.
// MyApp.mxml
<?xml version="1.0" encoding="utf-8"?>
<s:WindowedApplication xmlns:fx="[URL]"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx"
xmlns:local="*">
[Code] .....
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Jan 17, 2011
I wrote a simple class called CustomTextField.as as follows:
package{
import flash.text.TextField;
public class CustomTextField extends TextField{
[code].....
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Oct 12, 2010
Something I've been struggling with and can't seem to figure out. What I want for a system is to create several components, BUT each with their own timeline. For instance for a quiz, I want a number of answerbuttons. But each one should have their own appearance, preferably on a timeline. However these should be components, seeing their 'answerbutton'-logic should be the same over all buttons (apart from their answerbutton-index, set in the Component Parameters).
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Dec 6, 2009
So I have a movie clip associated with an external class in the linkage dialog. I put that movie clip on the stage. I have another external class that contains some code (not for the movie clip but for the stage). When I access the custom properties of the class in the actual flash file (not the external code) everything works fine.For example.myMovieClip.explodeTheCode = true;works in the main movie. However, it doesn't work in the external flash file when I have a reference to that movie clip.myRefToCustomMovieclip.explodeTheCode = true fails!It throws an error. In java, I'd just import the custom class the movie clip is linked to and then I can call all the extra custom methods on the movie clip in the external class I want. However, this does nothing. I still can't access any properties.So my question is, how do I access the custom features of a movie clip (that is linked to a custom class) from an external code file. It works in the movie, but not in the external source code.
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Apr 5, 2010
How can I use displayObjects as animation frames?I have six symbols in my library I want to animate with a timer. The advantage would be the ability to change the speed of the animations, and the elimination of the messy timeline.
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timer.addEventListener(TimerEvent.TIMER, countdown);
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[code].....
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Oct 12, 2010
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[Code]...
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Oct 15, 2009
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What I'm trying to do is load a group of Images via XML. Each one of those images have a set of information that is associated with them (name, description, etc). I have the images loading in and positioning just fine, however when trying to have a tooltip show the name on Mouse Over, I'm not able to achieve this...
In short. I want to be able to store information for each item so that I can access it. Is there a way to do this in AS3 with a Loader or is there another route I can go? If I do this with Arrays, how do I store the Index of the specific item so I can use that in reference to the position in each array?
[Code]...
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Apr 19, 2010
Looking to see if anyone has examples of adding custom properties to the CheckBox object. I'm trying to pass a few other parameters to the click handler to extend the functionality of the cb. [code]
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Sep 18, 2009
since I cant create a custom property on a sprite if extend a sprite, should be able to make a custom property then or do I need to use a movieClip?
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Apr 20, 2009
I've got another interesting Flash issue, and I was wondering if there was some weird case I had to account for. Here's the code: var c:DisplayObject; var t:Rectangle; c.width = t.width; trace(c.width, t.width); This results in output of: 0 13 I'm expecting '13 13' as the output..what would cause this to happen? It's sporadic, sometimes it'll happen, sometimes it doesn't. Is there some weird race condition I should double check for?
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Jun 7, 2010
I can't use a "for in " loop to enumerate public properties of a custom class. So I have a class "ClassA" , which has some public properties. if I try :
PHP Code:
trace(classInstace.hasOwnProperty('property1'));// true
trace(classInstace.property1) // traces the property correctly
trace(classInstance.propertyIsEnumerable('property1')); // traces false ????
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Jan 15, 2009
I have been stuck on this problem for a while, and wonder if anyone knows the answer. It is concerning accessing some properties of a custom component. I marked the problem with the keyword [PROBLEM] in the following snippets of code.
components/State1UI.mxml
--------------------------------
<?xml version="1.0" encoding="utf-8"?>
[code].....
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Oct 14, 2009
Through searching the various forums I have found that Loaders are not dynamic and hence you can not apply custom properties to each instance of them. I miss the old way (as2 way of attachingMovieClip) that you load dynamic content, at least you can apply custom properties, and you can always reference them for each object.What I'm trying to do is load a group of Images via XML. Each one of those images have a set of information that is associated with them (name, description, etc). I have the images loading in and positioning just fine, however when trying to have a tooltip show the name on Mouse Over, I'm not able to achieve this.
In short. I want to be able to store information for each item so that I can access it. Is there a way to do this in AS3 with a Loader or is there another route I can go? If I do this with Arrays, how do I store the Index of the specific item so I can use that in reference to the position in each array?** Should I use getChildIndex() in the function for the Event Listener to reference the data stored in the arrays for each item? If so, how do I do so? ***
PHP Code:
num = 0;var titleArray:new Array();function createImage(){ var thumb:Loader = new Loader; thumb.load(new URLRequest(url);
[code].....
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Oct 24, 2009
Is it possible to dynamically name properties on a custom object ?
something like:
Code:
o:Object = new Object();
s:String = 'abcd'; // the name I want for my objects property
o.[s] = '1234'; // 1084: Syntax error: expecting identifier before leftbracket.
trace(o.abcd) // 1234
EDIT I want to do this as an associative array, so if there is a better alternative then I'd be happy with that as well.
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Nov 7, 2004
In AS2 we can not add methods n properties to built-in classes in the way we do in AS1. Like we would -say- write the custom "isNatural" method on the "Math" class as follows : * The following code is valid in AS1 but not in AS2
[Code]...
As the "Math class" is static internally. We know why we can not add custom methods n properties to every class, as the way we do in AS1. Later I came up with senocular' s very nice tutorial on OOP in AS2. And now i know how we can do it in AS2 style in an efficient n organised way. But i have a problem with the following code. It should not work ! but it does... * Following code is valid for both in AS1 and AS2.
[Code]...
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Feb 21, 2012
How does Flash deal with elements that are off-stage?Obviously Flash doesn't actually render them (because they don't appear anywhere on-screen), but is the process of rendering them still existent, slowing down my game as much as it would if the elements were on-screen?
Or does Flash intelligently ignore elements who don't fall into a renderable area?Should I manually manage removing objects off the DisplayList and adding them back on as the exit and enter the stage, or is this going to be irrelevant?
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Jul 26, 2009
How do I access Stage Class properties in Custom Class?
Class:
package {
import Main;
import flash.events.*;
import flash.display.Sprite;
import flash.display.Stage;
public class Run extends Sprite {
[Code] ....
Output:
TypeError: Error #1009: Cannot access a property or method of a null object reference.
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Dec 11, 2009
I've written the following custom component, SubNavBar.mxml:
<?xml version="1.0" encoding="utf-8"?>
<mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml" height="100" width="300"
creationComplete="init()">
<mx:Script>
[Code]...
Whenever the trace function runs in init(), the property menuItems returns null. I don't seem to have this problem with other variable types, like Boolean or String. Is this due to the size of the XMLListCollection object? How can I set up this SubNavBar custom component with XMLListCollection property and bind it to a control in the component?
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Feb 15, 2010
I am implementing a scrollbar using a custom embedded image using my CSS stylesheet. This is a very simple, thin scrollbar. I would like to configure this scrollbar using CSS properties at runtime, but so far I have been unable to do so. I know it can be done because I've seen examples of it in the net, but no code to review.
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Jan 3, 2011
I'm trying to make a simple flash application providing interface for taking tests as a high school assignment. One of the requirements is to use an XML file as data source.Now, having a List component bound to the XML file with questions consisting of data such as question body, question type (ie. single choice, multiple choice, open, image etc.) and possible answers (where applicable), I was wondering if I could add some additional data (and what is the best possible way to do so) to each question upon its transfer to the List component.
I am trying to achieve two main goals with this: firstly, to mark the questions to which an answer has already been given, like with such code in ItemRenderer class:
<s:Label color="{data.color}" text="{data.label}"/>
Where data.color would be set whenever the user gives an answer to a question.
Secondly, while at it, I thought of such possibility as a great way to store answers given to particular questions. In this case, the Class of the answer object would have been Object, since there has to be many type of questions (where the answer could also be a Bitmap for example).
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Mar 10, 2009
I have just created a custom AS3 Component to use in an MXML project.[code]but then i lose some re usability.What do i need to do to be able to set properties from mxml?
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Feb 8, 2010
I need to create a custom Object that basically stores some custom parameters (properties?), which I have successfully done, and the code below works fine.
PHP Code:
myObject = new Object();
myObject.nameLabel = "New Releases";
myObject.artOrientation = "portrait";
myObject.artAmount = 5;
I find the new compiler and debugger capabilities very useful, since I'm not the most detail-oriented, so I (usually) like that Flash forces me to strict-type my variables and such. Anyway, I was wondering if it's a "best practice" to strict data type a custom objects' properties, and if so, how to do it in the logic above? I kept getting syntax errors when I just tried it initially.
I know if I created a custom Class .AS file, I would be forced to data type the properties... but I'd rather just do it "in-line" in my main .FLA file. Also, I know I can just pass typed VARIABLES to the properties... but I'd rather have the properties strict-typed themselves... so if I try to pass a variable as the wrong type, then I would still get an error.
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Nov 28, 2008
i wonder why i am unable to access the public properties of this custom class the public var w:Number; and the Public var h:Number; i am tracing them and on an instance of the PreLoader() Class.. and ia m getting NAN;
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Jan 6, 2010
I have multiple items in my app that I would like the user to click on.Some items are completely different classes.The classes dispatch events and then when the events are captured, some modifications are done to the transform properties of a loosely coupled display object.I want two separate classes to dispatch the same type of event, since I already have an image class that draws images based on a given url... I want the classes to dispatch the events, but then I think I want the difference to be detected when the event comes along... i.e., I would like to recognize the 'origin' or 'sub-type' of the event. Some sort of if/then logic would suffice.
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Dec 28, 2010
How does flash player handle objects when they are no longer on the visible stage? Is the graphical data still in memory? Does hittestobject/point consider them? Are enterframe and interval events still running?
In AS2 I would hold metaobjects (minimal x,y,width,height data) that would delete/create movieclips as the screen scrolled. Is this still a correct approach in AS3? If not, is there anything I can do to offstage display objects that improves efficiency, assuming around 400 are created initially?
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