Thank you tracy. That helps a lot. I got it to work!
----------------------------------------
From: "Tracy Spratt" <tspr...@lariatinc.com>
Sent: Tuesday, March 10, 2009 6:42 AM
To: flexcoders@yahoogroups.com
Subject: RE: [flexcoders] Moving a viewStack through actionscript
Put the change handler on the RadioButton
group, and in that handler dispatch your specially named, bubbling event. In
the handler for that event, you can access the dispatching component through
the reference in the target or currentTarget property. So you can access the
value of the RadioButtonGroup through that reference.
Tracy Spratt,
Lariat Services, development
services
available
----------------------------------------
From:
flexcoders@yahoogroups.com [mailto:flexcod...@yahoogroups.com] On Behalf Of
Wally Kolcz
Sent: Tuesday, March 10, 2009 8:34
AM
To: flexcoders@yahoogroups.com
Subject: Re: [flexcoders] Moving a
viewStack through actionscript
Sorry to be a pain, but when I added the
parent.parent.checkSingle() it gives me an error.
1061: Call to a possibly undefined method checkSingle through a reference with
static type flash.display:DisplayObjectContainer.
I though my problem was the 'public var testMod:test1 = new test1();', thinking
the 'new test1()' was the problem. So I removed it and just set it to a local
variable. public var testMod:test1; I was able to see the checkSingle method in
the auto hinting. But when I try to run it now, I get that the testMod is null.
If I were to do the dispatchEvent route, I would have to attach it to the test1
module, right? this.addEventListener("answered",
checkSingle);. How could I get the variable passed from the
components (questions) to the module's checkSingle() method? There will be
between 20-100 of these questions.
----------------------------------------
From
: Michael
Wills <mich...@mawills.com>
Sent: Monday, March 09, 2009 3:21
PM
To: flexcoders@yahoogroups.com
Subject: Re: [flexcoders] Moving a
viewStack through actionscript
Hi
Wally, sorry I missed the hierarchy there. You have checkSingle on the module
and not the Viewstack. In that case, you should be able to do
parent.parent.checkSingle
and leave out the cast as test1. So
public var testMod:Object = parent.parent;
The last one failed because it was trying to convert a viewstack into a test1
which of course isn't a viewstack. But I'm not sure about this one because the
parent.parent is a module. You could also forgo using the testMod variable and
in your click declaration instead of
click="testMod.checkSingle(group1.selectedValue)"
use
click="parent.parent.checkSingle(group1.selectedValue)"
/>
Hopefully that'll work for you.
If you have a little time to invest, and if you may be doing more Flex apps in
the future, even though this one is not going to be a full-on huge app, I'd
learn about dispatching custom events. It's not that complicated but it takes
some time to understand. It would save some of the hassle you're trying to do
of course at the expense of a new and different kind of hassle. :-)
Michael
Wally Kolcz wrote:
Wow...its
a 'simple' one time create app.
All I want to do is when the user selects an answer on the question1.mxml
component, they can click a button, pass the value of the radio button to
the test1 module's checkSingle() method and then move to the next
question in the test1 module's stack.
When I changed the function call on the button of question1.mxml to
test1(parent).checkSingle(group1.selectedValue); <mx:Button
label="Next" click="test1(parent).checkSingle(group1.selectedValue)"
/>
I get this error:
TypeError: Error #1034: Type Coercion failed: cannot convert
mx.containers::viewst...@6563ae1
to com.ipexpert.tests.test1.
at
com.ipexpert.questions.q1::question1/___question1_Button1_click()[D:\wkolcz\My
Documents\Flex Builder
3\IPExpertBrainBuster\src\com\ipexpert\questions\q1\question1.mxml:21]
Here is checkSingle() and nextQuestionPlease()
public function checkSingle(answer:Object):void {
if
(answer !=0) {
Application.application.score += 1;
}
currentQuestion += 1;
nextQuestionPlease();
}
public function nextQuestionPlease():void {
questionsVS.selectedIndex=currentQuestion;
}
----------------------------------------
From
: Michael
Wills <mich...@mawills.com>
Sent: Monday, March 09, 2009 11:44
AM
To: flexcoders@yahoogroups.com
Subject: Re: [flexcoders] Moving a
viewStack through actionscript
If I am
understanding your code correctly, you actually want to call
test1(parent).checkSingle instead of testMod. The reason is because you
are instantiating a brand new, and unrelated, test1 component with
public var testMod:test1 = new test1();
You might be able to do
public var testMod:test1 = test1(parent);
casting the variable to the type test1.
If it's a simple app you are working on, you can do this kind of tightly
coupled design. By that I mean, your question1 component knows about
your test1 component. If it's a more complex app though, you may want to
look at "decoupling" your app. Otherwise this app will quickly become
inflexible and harder to maintain as it grows.
In this case, you could set up your question components to dispatch an
event that your test1 then listens to. That way question1 doesn't have
to be directly connected to "parent".
I hope that makes sense!
Michael
Wally Kolcz wrote:
>
> When I added the click="nextQuestion()" it was triggered
off the
> selecting of a radio button and not the button. Here all the code I
> have. It is telling me that the viewStack doesn't exist when I believe
> it should.
>
> test1.mxml
>
> <?xml version="1.0" encoding="utf-8"?>
> <mx:Module xmlns:mx="http://www.adobe.com/2006/mxml";
layout="vertical"
> width="100%" height="98%"
> xmlns:questions="com.ipexpert.questions.q1.*"
> creationComplete="initApp()" >
> <mx:Script>
> <![CDATA[
> import mx.core.Application;
>
> public var testID:int = 1;
> public var currentQuestion:int = 0;
>
> public function initApp():void {
>
> }
>
> public function checkSingle(answer:Object):void {
> if (answer !=0) {
> Application.application.score += 1;
> }
> currentQuestion += 1;
> nextQuestionPlease();
> }
>
> public function nextQuestionPlease():void {
> }
> ]]>
> </mx:Script>
> <mx:ViewStack id="questionsVS" width="98%"
height="100%"
> paddingLeft="10">
>
> <questions:question1 />
> <questions:question2 />
> <questions:question3 />
> <questions:question4 />
> </mx:ViewStack>
> </mx:Module>
>
>
> question1.mxml
>
> <?xml version="1.0" encoding="utf-8"?>
> <mx:VBox xmlns:mx="http://www.adobe.com/2006/mxml";
width="98%"
> height="98%">
>
> <mx:Script>
> <![CDATA[
>
> import com.ipexpert.tests.test1;
>
> public var testMod:test1 = new test1();
> ]]>
> </mx:Script>
>
> <mx:Label fontWeight="bold" text="1. Which layer(s)
of the OSI
> Reference Model provide(s) for internetwork connectivity?" />
> <mx:RadioButtonGroup id="group1" />
> <mx:RadioButton paddingLeft="10"
groupName="group1" label="Data
> Link" value="0" selected="true" />
> <mx:RadioButton paddingLeft="10"
groupName="group1"
> label="Physical" value="0" />
> <mx:RadioButton paddingLeft="10"
groupName="group1"
> label="Session" value="0" />
> <mx:RadioButton paddingLeft="10"
groupName="group1"
> label="Network" value="1" />
> <mx:RadioButton paddingLeft="10"
groupName="group1"
> label="Presentation" value="0" />
>
> <mx:Button label="Next"
> click="testMod.checkSingle(group1.selectedValue)"
/>
> </mx:VBox>
>
> ----------------------------------------------------------
> *From*: Michael Wills <mich...@mawills.com>
> *Sent*: Monday, March 09, 2009 10:55 AM
> *To*: flexcoders@yahoogroups.com
> *Subject*: Re: [flexcoders] Moving a viewStack through actionscript
>
> Hey there Wally,
>
> You can get access to the currently selected viewstack, and also set it,
> through selectedIndex. So your initial declaration would be like
> <mx:ViewStack id="questionVS" etc... selectedIndex="0"
> click="nextQuestion()">
>
> and in your function nextQuestion you can increment the selectedIndex.
> I'd have to check but I think you can find the number of items in your
> viewStack with numChildren. That would give you your max value to finish
> your quiz or handle the end how you would like.
>
> You can find more about what you can do with viewstacks in the docs:
>
> http://livedocs.adobe.com/flex/3/langref/mx/containers/ViewStack.html
> <http://livedocs.adobe.com/flex/3/langref/mx/containers/ViewStack.html>
>
> Hope that helps!
>
> Michael
>
> Wally Kolcz wrote:
> >
> > I have a test that I want to walk through the questions using a
> > function. How can I set the inital value of the ViewStack
> > (questionsVS) to 0 and then increment it by one each time someone
> > clicks a button?
> >
> > <mx:ViewStack id="questionsVS" width="98%" height="100%"
> paddingLeft="10">
> > <questions:question1 />
> > <questions:question2 />
> > <questions:question3 />
> > <questions:question4 />
> > </mx:ViewStack>
> >
> >
>
>
>
