ActionScript 3.0 :: Creating A Pop Up Class Using Custom Events?
Dec 30, 2009
I have made a site in AS3.0 code and it's working fairly well but theres alot of things i'm trying to update to make the code a little more reusable. For startersI have a function that creates a little pop-up text when I roll over a button. The text is a class that I created in the Flash IDE instead of dynamically drawing it with actionscript.Here is the code for the pop up text instance called "enter_text" as it rolls over the movie clip "preloader_mc"
Code:
//add listeners to the preloader_mc movie clip on stage
preloader_mc.buttonMode=true;
I've been running into a billion problems while creating custom events, so I clearly don't understand some of the basics. All the examples I've found online are unnecessarily complicated, so I've gone ahead and created a super simplified version of how I think it should work. The results are in bold...
I'm using ActionScript 3 in Flash Professional and I'd like my class to raise an event, not a custom event but an existing one. I've set up my class so that it extends EventDispatcher. In the documentation [URL] the example declares a custom event by adding a static String variable: class CustomDispatcher extends EventDispatcher { public static var ACTION:String = "action";
I assume that enables: dispatcher.addEventListener(CustomDispatcher.ACTION, actionHandler); Or at least auto-complete when you've typed 'dispatcher.addEventListener(' into the Flash Professional IDE.
But lots of classes that raise events raise a mixture of existing noncustom events. For example if you have an instance of a flash.netFileReference and type fileRef.addEventListener(
A long list of potential events to listen for is given including DataEvent.UPLOAD_COMPLETE_DATA, Event.SELECT, HTTPStatusEvent.HTTP_STATUS, SecurityErrorEvent.SECURITY_ERROR, etc.
If I want my class to be registered to raise those existing events, what code do I need? Preferably so that the IDE knows instances of my class may raise the event and suggests them in the addEventListener auto-complete/intellisense list.
I have an <mx:Application> which contains a <mx:Module>. This module has several child modules. It also has some an instance of a class I have created. I am trying to have a method of this class dispatch an event that can be "heard" by the module and handled. This isn't happening.To be more clear, I am using 'dispatchEvent' to from inside a class method.There is an instance of this class in: mx.core.Application.myapplication.mymodule.myclassIt is the 'myclass.somefunction' that dispatches the event. I have a listener registered in 'mymodule'. Nothing happens when the function/method runs, however.
I came to some misunderstanding how to use events. LOL. I thought I understand it but as I see I dont.
I've got a Engine document class where Hero is added, and Cannon object too. In body of Hero I need to dispatch event when Hero reaches some point or particularly a pitfall, so I've got static const string to handle it:
[Code]...
but this way I would end up with dozens of handlers in the Engine body class, and I am trying to minimize this class as it is big enough without those handlers. I am stunned and suprised, and I am noob again. Maybe someone will clear out how to get custom events working/... and why only instance of object that dispatches an Event can hear it (my case).
I'm curious about event performance. I have a custom class that downloads files from a server and writes to your local system with AIR. This class has a few custom events that fire during a download process: File starts downloading, files finishes downloading, error occurred, progress, and a few others. This class was built for a specific project, but made coupled so it can be used for anything else wanting to download a file from a server. I'm starting to implement it into a new project, and a few events I'm not listening for, such as when the file starts downloading, or the progress of it, just the complete.
Does it strain overall performance having all the other events still dispatching, when I know they aren't being listened to? Would be be better to comment out the dispatchEvent() for the specifics I know aren't used, or does it even matter? There's obviously events dispatched throughout the SDK that aren't always listened for: Right click, drag, resize, etc. This makes me think it doesn't matter that these events fire but aren't handled, but since code is running and things are happening, that means there is performance going on.
I'm having a problem with a custom subclassed Event class. Or I should say, I'm having trouble receiving events from this custom event class. I'm pretty sure I have everything wired correctly, the event is dispatched properly and my trace shows the Event instance being spawned. However, my eventListener, which is in another class, never fires its handler function.Have any of you run across instances where custom event classes fail to fire? I'm about at my wit's end.
Would it be possible for me to also dispatch non-custom events (like Event.CHANGE) from inside a class? I already did this with custom events which worked fine, but when I try to dispatch a the Event.CHANGE it will tell me that I am trying to convert a String into an Event (??). What I do is:[code]
I am trying to work out how to do something really hard and i think the only way that I can do it is to pass a timer an argument. I want to create a class that moves buttons to the right on mouse over, and moves them back on roll out. But I am trying to make a sort of easing effect in action script. The last movement should be 1 pixel, the second to last move 2 pixels, the third to last be 3 pixels etc.
The class will have a variable that stores the original x coordinate and the desired resting coordinate for the button on roll over. on roll over, the script calculates the number of pixels between where it is and the destination, or on roll out, it would calculate the number of pixels from its current position to the original position. Then it would use that number to do the following calculation:
while(numPix>countPix){ count++ countPix+=count } this.x=destinationX-countPix /*or + count pix depending on weather its moving to the right or left*/ while(count>0) { this.x+=count /*or -= if moving back*/ count-- /*timer would elapse here*/ }
So u see, it counts the number of pixels it needs to move, then it counts the number of increments (count) it needs to move between timers for this sort of easing motion. I just don't know how to implement this in actionscript
I'm creating a custom class to retrieve some data using URLoader.My code is below, doing this from memory, plz ignore any minor typos.The challenge I'm encountering: when my custom class calls the loader, the event handler takes over. At which point the context of my code leaves the function and it's not clear to me how I then return the data retrieved by the loader. I sense that I'm breaking the rules of how ActionScript really runs by putting a loader in a separate class; at least, that's my primitive understanding based upon the reading I've done on this.So can I do this? I am trying to create a clean separation of concerns in my program so that my main program doesn't get clogged up with code concerned with retrieving remote data.
I've been trying to create a simple loader class that loads an image file onto the stage.
Writing the code to perform the task is simple via the main timeline:
Code: var picloader:Loader picloader = new Loader() picloader.load(new URLRequest("photo/1.jpg"))
[Code]....
How should I write the class such that it performs this function? Ideally I would like to specify the file I want to load eg. loadimage("photo/1.jpg") when I run the method.
I make classes that extend movie clip, but I want to dynamicaly create instances of this class, so I really create MovieClips, but with the added features of the class. How should I create this instances? I want 'this' to be the root of this new movieclip with added features
how to create custom event from beginning to end in AS3?I'd like to know how to create a custom event that extends the Event class and then how to dispatch it. Also, I'd like to know how to catch it using the addEventListener() in the format Event.ENTER_FRAME or Event.CHANGE etc...
I'm having some difficulty understanding how events work. I believe "ENTER_FRAME" is a constant holding some value but I don't see how that could dispatch an event. From what I understand; ENTER_FRAME is a static variable of the Event class?
I make classes that extend movie clip, but I want to dynamicaly create instances of this class, create MovieClips, but with the added features of the class. How should I create this instances?
I would like to make a new instance of a MovieClip within my library from code written in my keyframe. I relise that you can do this by making a class and using the codeCode:var instancename:movieclipname = new movieclipname(); and with the MovieClips class I would need to extend MovieClip and nothing else. I am unsure if you put in the name of the MovieClip or the name of the MovieClip class in the code above so feel free to correct me. But instead of doing this can I just add a MovieClip to my stage with doing this
I have a problem that seems easy enough to solve but I'm trying to do it with reusable code, which involves doing something I don't understand yet. I've googled this endlessly and read dozens of articles and I'm still just as lost as when I started. I'm hoping a live human being can help me make sense of it.
I have a movie clip on stage. When this movie clip is pressed, I want it to play a certain frame of another movie clip for as long as it's being touched. (It's a map of the US, that will display each state name as it is pressed.) I COULD write 50 different functions, each to call a different frame of the displayName movie, or I could write my own custom event that would be able to receive from each touch event a string variable to then tell displayName which frame to play. So basically, I have, for example:
I had watched a CartoonSmart Tutorial on AS3, and the amount of code that goes into a button seems to much (especially coming from AS2). I tried to create a custom class to make my life easier for this, but... I ran into a snag.
Errors: Code: 1046: Type was not found or was not a compile-time constant: MouseEvent. I receive that error 4 times in these locations.
Code: function ButtonClick(event:MouseEvent):void { function ButtonRollOver(event:MouseEvent):void { function ButtonRollOut(event:MouseEvent):void { function ButtonDown(event:MouseEvent):void {
Here is my button_class.as file. package { public class button_class { function button() { }buttonVar.addEventListener(MouseEvent.MOUSE_UP , ButtonClick ); function ButtonClick(event:MouseEvent):void {
I am using Flash CS3 Professional. And when I have the class put directly into the main time line ( Copy and paste) It works perfectly, but not here.
I have the following as code in a separate file placed in the root folder of the swf file. The as file is the class for a MovieClip in the library.When i manually place the library symbol on the stage, the MC works fine and draws the square with the nodes. However, when I try to create a copy using ' new sqMC();' code, I get an error.
I am new to AS3, as well as Flash in general, so forgive me if this seems highly elementary. All I am trying to do is create a custom class that extends the MovieClip class and contains a custom property of "marker". I want to be able to use and change the value of this custom property on the timeline for an instance of this class and have it behave just like any other (Ex: this.x ==> this.marker).
I have a custom class being constructed from my main class. In the custom class it has another custom class that is passed in as a parameter. I would like to strictly type the parameter variable but when I do, 'the type is not a compile type constant etc'.This, I understand, is because the custom class used as a parameter has not yet been constructed.It all works when I use the variable type ( * ) to type the parameter.I suspect this is a design flaw, in that I am using an incorrect design pattern.It is actually hand-me-down code, having received a large project from someone else who is not entirely familiar with oop concepts and design patterns.
I have considered using a dummy constructor for the parametered class in my main class but the passed in class also takes a custom class (itself with a parametered constructor). I am considering using ... (rest) so that the custom classes' parameters are optional.Is there any other way to control the order of construction of classes? Would the rest variables work?edit)in main.as within the constructor or another function
var parameter1:customclass2; customclass1(parameter1); in customclass1 constructor:
This is my first time working with a class attached to a movieclip that is nested inside a class attached to a movie clip.I've tested all the properties and methods of PTListItem.as and they work properly but when I try to call them on the list item through PTListTop.as it returns undefined.The end goal is to dynamically load a checklist via a txt file.
I have the following situation:I have an event handler, that displays small messages in my application's statusbar.These messages get passes through by dispatching events from custom components.A simple message could be like "HTTP Error" or so.Now, the main event listener, in the main application file, listens to the event dispatched by any custom component,but seems to refuse listening to events dispatched by custom AS classes.Here is my code for the custom event:
package components { public class templateSelection extends VBox { static public var tempSelectionBag:Dictionary;
[Code]....
I want to have a custom class tempSelection with a Dictionary as a public accessable property of that class. If I use this code, the compiler tells me:
1046: Typ wurde nicht gefunden oder war keine Kompilierungszeit- onstante:Dictionary
Which translates to:
Type was not found or was not a compile-time constant: Dictionary
I have a main class which listens for an event dispatched from another class say class A. Also there are other classes say class B, class C etc.There is a controller class.Classes B, C dispatches events that gets listened by the controller and works well.But the events dispatched by the Class A doesn't get listened by the main class.What might be the problem. Detailed Explanation of the problem.There is a main mxml file.
Class files are in: ProcessInput.as DBController.as ShortMemDB.as ....etc
The main mxml file gets the input from a textArea. Sends the input to the capturedInput (input:String) function using set method which is in the ProcessInput Class.Now I need to dispatch events NORMAL, COMMAND depending on the input obtained after the processing, where I'm having problems. The reason is that if the event NORMAL is dispatched a particular function inside the DBController is to be called. If COMMAND event is dispatched then I need to call another function. This idea doesn't work since the events doesn't get listened.But the events dispatched by the CSDB class when listened by the DBController works well.
So heres the issue I'm haveing, my event listener is not being triggered from the parent, and not retrieving my string for each button being clicked on.
Here is the event listener which listens for the subclass to dispatch an event called MenuEvent.LOAD_PAGE and then passes a string to a variable thats called whatPage thats defined within my custom event.
In Actionscript 3, most events use the capture/target/bubble model, which is pretty popular nowadays:
When an event occurs, it moves through the three phases of the event flow: the capture phase, which flows from the top of the display list hierarchy to the node just before the target node; the target phase, which comprises the target node; and the bubbling phase, which flows from the node subsequent to the target node back up the display list hierarchy.
However, some events, such as the Sprite class's enterFrame event, do not capture OR bubble - you must subscribe directly to the target to detect the event. The documentation refers to these as "broadcast events." I assume this is for performance reasons, since these events will be triggered constantly for each sprite on stage and you don't want to have to deal with all that superfluous event propagation.
I want to dispatch my own broadcast events. I know you can prevent an event from bubbling (Event.bubbles = false), but can you get rid of capture as well?
