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 <[email protected]>
Sent: Monday, March 09, 2009 11:44 AM
To: [email protected]
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 <[email protected]>
> *Sent*: Monday, March 09, 2009 10:55 AM
> *To*: [email protected]
> *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>
> >
> >
>
>
>
