[Xerte] xerte 2.n - Help needed to remove and then re-duplicateicons

[Kemp Johnathan]

I had considered that something like what you suggest might be possible.

The program flow should never go beyond the Restart button, so it should be
simple enough to put a copy of the protoNode somewhere in the icon sequence
after the Restart button.

Whilst I know how to remove nodes and duplicate an existing node - that is
to the extent you can see in my quiz example, I have no idea how you would
programmatically go about taking a copy of a node from one location and
duplicating it to another location.

There are some things about Xerte I understand quite well. There are other
things that work when I copy the code written by the Masters, perhaps they
work because I have such faith in them :-)

Kind regards

Johnathan

On 9 June 2010 17:03, Julian Tenney <Julian.Tenney at nottingham.ac.uk> wrote:

>  Can you do it by having a protoNode somewhere the flow never goes, and
> when you kick up the question get that node, append it to the appropriate
> parent and then dupe it?
>
>
>
> Then when you return, loop over childNodes, deleting each one using
> removeNode(), then put back your protoNode and duplicate it. You might need
> to make sure you are getting a copy of the protoNode and not a reference.
>
>
>
> Does that sound like what you are trying to do?
>
>
>
> *From:* xerte-bounces at lists.nottingham.ac.uk [mailto:
> xerte-bounces at lists.nottingham.ac.uk] *On Behalf Of *Kemp Johnathan
> *Sent:* 09 June 2010 15:32
> *To:* Xerte discussion list
> *Subject:* Re: [Xerte] xerte 2.n - Help needed to remove and then
> re-duplicateicons
>
>
>
> No that's not it.
>
>
>
> The page I am trying to create will allow the end user (not the designer
> who sets up the wizard) to select options that will decide which questions
> are offered to them. This means that each time they reach the "quiz" end and
> click restart it will be necessary to as far as is possible get back to the
> situation that applied before the page was first run.
>
>
>
> The quiz works by taking an icon structure called protoQuestion and
> duplicating it to accomodate the number of questions to be displayed.
>
>
>
> For my page to work, if built == true, I need to remove all nodes that were
> duplications of protoQuestion and then re-duplicate the nodes the number of
> times appropriate for the current selections the user has made.
>
>
>
> You will get a feel for what I am trying to achieve if you open the project
> example I attached to my last email and use the TOC to go to the
> randomSequence page. The part of the quiz code that builds the pages is not
> run in the getPageID script. The user selections are processed first to
> create an array with one element for each "question" "option". The create
> questions script then runs to duplicate protoQuestion as many times as is
> necessary based on the length of the array. The page works once but fails on
> the restart - at present I have removed code that represents early attempts
> to remove and re-duplicate the icons.
>
>
>
> I have included the quiz page as a simpler example that is closer to the
> original script for the quiz page. The only difference being that I have
> separated out the part of the getPageId script that makes the pages and
> moved it to the end of the icon sequence to just before the Decision icon.
> The quiz page still works.
>
>
>
> The challenge is to take the code in the "make questions" script of the
> quiz page and add an else section to it.
>
> e.g.
>
>
>
> if (icon.attributes.built != 'true'){
> icon.parentNode.getChildByName("questions").firstChild.duplicate(pageIcon.templateData.learningObject[0].quiz[0].question.length
> - 1);
>
> icon.attributes.built = 'true';
>
> }
> else {
>
>   // code needed here that will
>
>  // 1. remove all the pages created by the duplication that occurred in the
> if section above;
>
>  // 2. duplicate the pages affresh, such that the page still works each
> time it is restarted or revisited.
>
> }
>
>
>
> If I can find out how to do this it should be straight forward to modify
> this so that the code
>
> a) removes all the pages duplicated the last time the page was run
>
> b) duplicates the appropriate number of new pages required to meet the end
> users latest selection
>
>
>
> which are the requirements of my new wizard.
>
>
>
> The quiz page at present can remove nodes and re-create them, but
> comparison of the xml of the pages that existed after the initial, build by
> using debug, with the new pages created, shows them not to be the same and
> the page fails to run correctly in the second running. .i.e. when it is
> restarted or revisited.
>
>
>
> Is what I am trying to achieve possible? I cannot recall a Xerte page that
> actually allows the end user to take actions that effectively allow the end
> user to configure in some way the pages structure.
>
>
>
> Kind regards
>
>
>
> Johnathan
>
>
>
>
> On 9 June 2010 11:30, Julian Tenney <Julian.Tenney at nottingham.ac.uk>
> wrote:
>
> When you’re manipulating xml, I always do:
>
>
>
> If (icon.built != true){
>
>   //manipulate the xml
>
>   icon.built = true;
>
> }
>
>
>
> Then it will only happen once, and bult = true is set on the underlying XML
> node itself. Is that it?
>
>
>
>
>
> *From:* xerte-bounces at lists.nottingham.ac.uk [mailto:
> xerte-bounces at lists.nottingham.ac.uk] *On Behalf Of *Kemp Johnathan
> *Sent:* 09 June 2010 10:08
> *To:* Xerte discussion list
> *Subject:* [Xerte] xerte 2.n - Help needed to remove and then
> re-duplicateicons
>
>
>
> I am working on a new page wizard that is based on the quiz page.
>
>
>
> As part of its functioning it presents the user with an option screen.
>
>
>
> The selections the user makes will decide how many "questions" are
> presented to the user.
>
>
>
> The problem is that whilst I can get the page to run once, if the user then
> clicks on the restart button, or returns to the page at a later time, the
> page will not run correctly a second time as I am not able to successfully
> remove and re-duplicate the "proQuestion" that is the master for all the
> questions that are created at run time.
>
>
>
> Can anyone see what I am doing wrong, or suggest the correct way to achieve
> this?
>
>
>
> I have attached a sample project which includes both a quiz page that
> attempts to remove and re-duplicate the questions each time the page is
> returned to or the Restart button is clicked. If I can get this to work I
> should be able to get the same process to work in my new page.
>
>
>
> The sample project also includes an example of my new page so that you can
> see what I am trying to achieve.
>
>
>
> The idea of the new page is to support music practice where for example the
> end result may be to play a number of different scales with both hands with
> variety of expression and style. Initially practice may be to learn the
> scales playing only the left or right hand, and then later add playing hands
> together, then later add variations of style and expression. Selection of an
> easy level only offers for practice single handed scales. Harder levels then
> introduce double handed play, variation in style and expression.
>
>
>
> In both example pages it is the "make pages" script icon that needs
> attention. The quiz page gives you some idea of what I have tried so far.
>
>
>
> Any help would be most appreciated.
>
>
>
> Kind regards
>
>
>
> Johnathan
>
>
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