[Xerte] Re: Xerte 2 : Combo box value is defaulting to "" why?

[Kemp Johnathan]

Given the xwd file content as

<wizard>
<!--GAP FILL
INTERACTION-------------------------------------------------------->
<gapFill hint="An interaction for creating a drag and drop gap-fill
exercise.">

<text type="TextArea" height="100" label="Introductory Text"/>
<passage type="TextArea" height="150" label="Gap Fill Text"/>
<interactivity type="ComboBox" label="Interactivity" options="Drag Drop,Fill
in Blank" width="100"/>
<feedback type="TextArea" height="50" label="Feedback"/>
<panelWidth type="ComboBox" label="Panel Width"
options="Small,Medium,Large,Full" width="100"/>

<narration type="media" label="Narration" optional="true"/>
<narPlayback type="ComboBox" label="Narration Playback" options="On user
request,On page load" data="userRequest,pageLoad" width="150"
optional="true"/>
<noise type="TextArea" height="50" label="Distractors" optional="true"/>
</gapFill>

</wizard>

If the optional parameter Narration Playback is not added then narPlayback
has a value of undefined

If the optional parameter Narration Playback is added then narPlayback has a
value of ""

Only once a combo box option other than the first option is selected by the
user does narPlayback get a value from the data list. So to actually give
narPlayback a value of "userRequest" the user would have to select first the
option "On page load" (giving narPlayback a value of "pageLoad"), then
select the option "On user request" (giving narPlayback the value of
"userRequest")

If the parameter was not an optional one then a value could be supplied in
the xml file which would then act as the default value. Since the parameter
is optional this is not appropriate.

I tried adding a parameter to the xwd declaration default="userRequest" but
this did not do anything.

Kind regards

Johnathan

On 11 April 2011 11:00, Julian Tenney <Julian.Tenney at nottingham.ac.uk>wrote:

> If you add the default value in the .xwd then that should be the value the
> property is instantiated in the xml as. You should always get a valid value,
> even if you don’t touch the drop down at all.
>
>
>
> No?
>
>
>
> *From:* xerte-bounces at lists.nottingham.ac.uk [mailto:
> xerte-bounces at lists.nottingham.ac.uk] *On Behalf Of *Kemp Johnathan
> *Sent:* 06 April 2011 17:28
>
> *To:* Xerte discussion list
> *Subject:* [Xerte] Re: Xerte 2 : Combo box value is defaulting to "" why?
>
>
>
> "I think default should be On Page Load (the label) rather than pageLoad
> (the data)."
>
>
>
> I interpreted (perhaps incorrectly) that what you were saying here was that
> rather than trying to pass a default value from the xwd file, I should
> include in the script that received the data e.g. getPageID code to test for
> a null value.
>
>
>
> Since I was setting up a combo box to allow a user to select between
> playing narration on page load or on user request I simply changed the order
> of the options around so that playing on page load was the second option.
> Action only needed to be taken if the second option was selected and
> selecting the second option always returned the same value (whereas
> selecting the first option might return "" or "onUserRequest". So it just
> kept the testing simpler.
>
>
>
> My experience during testing was that with respect to a combo box
> specifying an optional property
>
> 1. No optional property added : property value = undefined.
>
> 2. Optional property added and wizard closed without selection of a value :
> property value = ""
>
> 3. Optional property added and first option selected : property value = ""
>
> 4. Optional property added and second option selected : property value =
> "second option value"
>
> 5. Optional property added and second option selected then first option
> selected : property value = "first option value"
>
>
>
> Kind regards
>
>
>
> Johnathan
>
>
>
> On 6 April 2011 16:21, Julian Tenney <Julian.Tenney at nottingham.ac.uk>
> wrote:
>
> Can do that, yes, if it doesn’t already work? I know some controls take
> default values, precisely because when an optional attribute is added, it
> adds a null value: did you try what I suggested? This code from the wizard
> suggest all optional properties will handle a default value.
>
>
>
> //add optional properties
>
> addPropListener = new Object();
>
> addPropListener.click = function(obj){
>
>
>
>        if
> (wizard.nfoObject.wizard[tree.selectedNode.nodeName][optProps.selectedItem.data].defaultValue
> != undefined){
>
>               tree.selectedNode.attributes[optProps.selectedItem.data] =
> wizard.nfoObject.wizard[tree.selectedNode.nodeName][optProps.selectedItem.data].defaultValue;
>
>        } else {
>
>               tree.selectedNode.attributes[optProps.selectedItem.data] = ""
>
>        }
>
>        tree.dispatchEvent({target:tree, type: "change"});
>
> }
>
> addProp.addEventListener('click', addPropListener);
>
>
>
> *From:* xerte-bounces at lists.nottingham.ac.uk [mailto:
> xerte-bounces at lists.nottingham.ac.uk] *On Behalf Of *Kemp Johnathan
> *Sent:* 06 April 2011 15:29
> *To:* Xerte discussion list
> *Subject:* [Xerte] Re: Xerte 2 : Combo box value is defaulting to "" why?
>
>
>
> Thanks for your help.
>
>
>
> It seems strange to me that a combo box / drop down menu should default to
> returning "" rather than the value of the first element in the list.
>
>
>
> Since the xwd file provides the data for the construction of the wizard, I
> guess the behaviour of the wizard is governed by the code that processes the
> xwd file and presents the wizard form to the user, and that this is a part
> of the core Xerte code. Would it be possible to update the code so that a
> combo box when run could have either a default value specified in the xwd
> file or alternatively that it just defaulted to returning the value of the
> first item in the list unless one of the other items had been selected?
>
>
>
> Kind regards
>
>
>
> Johnathan
>
>
>
> On 5 April 2011 15:09, Julian Tenney <Julian.Tenney at nottingham.ac.uk>
> wrote:
>
> I think default should be On Page Load (the label) rather than pageLoad
> (the data).
>
>
>
> *From:* xerte-bounces at lists.nottingham.ac.uk [mailto:
> xerte-bounces at lists.nottingham.ac.uk] *On Behalf Of *Kemp Johnathan
> *Sent:* 05 April 2011 15:07
> *To:* Xerte discussion list
> *Subject:* [Xerte] Xerte 2 : Combo box value is defaulting to "" why?
>
>
>
> Hello Xerte team,
>
>
>
> As far as I can tell this line is set up like many other optional property
> lines and I don't recall hitting this problem before
>
>
>
> In an xwd file I have the optional property
>
>
>
> <narPlayback type="ComboBox" label="Narration Playback" options="On page
> load,On user request" data="pageLoad,userRequest" default="pageLoad"
> width="150" optional="true"/>
>
> When the page wizard is opened and the Narration Playback property added
> and the page wizard closed, the value of narPlayback changes from undefined
> to ""
>
> If the page wizard is re-opened the combo box displays the selected value
> as "On page load".
>
> Clicking on the value "On page load" does not change the value from "" to
> "pageLoad".
>
>
>
> The only way I can actually set the value of narPlayback to "pageLoad" is
> to select the alternative option from the combo box i.e. "On user request"
> and then to select "On page load"
>
>
>
> What am I missing here?
>
> What do I need to do to ensure that when the optional property is added it
> receives the default value of "pageLoad"?
>
>
>
> Kind regards
>
>
>
> Johnathan
>
>
>
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>  This message and any attachment are intended solely for the addressee and
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> This message has been checked for viruses but the contents of an attachment
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