<HTML dir=ltr><HEAD><TITLE>Having problems duplicating nodes</TITLE>
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<DIV dir=ltr><FONT face=Arial color=#000000 size=2>how fussy are you about the .xml format?</FONT></DIV>
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<DIV dir=ltr><FONT face=Arial size=2>could you work with:</FONT></DIV>
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<DIV dir=ltr><FONT face=Arial size=2><questions></FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial size=2> <question section="1"></FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2> <!--data for question here --></FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2> </question></FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial size=2> <!--etc--></FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial size=2></questions></FONT></DIV>
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<DIV dir=ltr><FONT face=Arial size=2>and generally, what does the .rlo need to do? Present a framework of content for each section, and then show the quiz (on the last page?). Do the page types vary?</FONT></DIV>
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<DIV dir=ltr><FONT face=Arial size=2>and then a final section framework summarises and then shows all questions, randomised?</FONT></DIV>
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<FONT face=Tahoma size=2><B>From:</B> xerte-bounces@lists.nottingham.ac.uk on behalf of Paul Swanson<BR><B>Sent:</B> Mon 08/12/2008 19:15<BR><B>To:</B> Xerte discussion list<BR><B>Subject:</B> RE: [Xerte] Having problems duplicating nodes<BR></FONT><BR></DIV>
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<DIV dir=ltr align=left><SPAN class=703430319-08122008><FONT face=Verdana color=#0000ff size=2>Commenting out the two randomQuizData lines doesn't change anything. I've moved the statement that randomizes the questions to the button that launches the final test, rather than have it in the setup script.</FONT></SPAN></DIV>
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<DIV dir=ltr align=left><SPAN class=703430319-08122008><FONT face=Verdana color=#0000ff size=2>Maybe I'm just going about this entirely the wrong way. What I want to accomplish is to have all my test questions within one setup.xml file. I have six lessons, and some of the questions will also be presented at the end of each lesson. So I need to parse which questions are for lesson 1, which are for lesson 2, etc. Once the student has completed all of the lessons, they must take a test to pass the course. This test will be comprised of all of the questions for all of the lessons, with the questions randomized. Am I on the right track with what I've been trying to do, or do I need to take a different approach?</FONT></SPAN></DIV>
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<DIV dir=ltr align=left><SPAN class=703430319-08122008><FONT face=Verdana color=#0000ff size=2>Paul</FONT></SPAN></DIV><BR>
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<FONT face=Tahoma size=2><B>From:</B> xerte-bounces@lists.nottingham.ac.uk [mailto:xerte-bounces@lists.nottingham.ac.uk] <B>On Behalf Of </B>Julian Tenney<BR><B>Sent:</B> Thursday, December 04, 2008 11:32 PM<BR><B>To:</B> Xerte discussion list<BR><B>Subject:</B> RE: [Xerte] Having problems duplicating nodes<BR></FONT><BR></DIV>
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<DIV dir=ltr><FONT face=Arial color=#000000 size=2>You are creating references to the same array.</FONT></DIV>
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<DIV dir=ltr align=left><SPAN class=980191719-04122008><FONT face="Courier New" size=2>quizData = templateData.quiz[0]; // non-randomized questions</FONT></SPAN></DIV>
<DIV><FONT face="Courier New"></FONT> </DIV>
<DIV dir=ltr align=left><SPAN class=980191719-04122008><FONT face=Verdana size=2><FONT face="Courier New">randomQuizData = templateData.quiz[0]; // for randomized questions<BR>randomQuizData.question.randomize(); // randomize the list of questions</FONT>.</FONT></SPAN></DIV>
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<DIV dir=ltr align=left><SPAN class=980191719-04122008><FONT face=Verdana size=2>quizData.question is also randomised.</FONT></SPAN></DIV></DIV></DIV>
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<FONT face=Tahoma size=2><B>From:</B> xerte-bounces@lists.nottingham.ac.uk on behalf of Paul Swanson<BR><B>Sent:</B> Thu 04/12/2008 19:32<BR><B>To:</B> Xerte discussion list<BR><B>Subject:</B> RE: [Xerte] Having problems duplicating nodes<BR></FONT><BR></DIV>
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<DIV dir=ltr align=left><SPAN class=980191719-04122008><FONT face=Verdana color=#0000ff size=2>I think the problem is where I take the quiz part of templateData and assign it to quizData:</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=980191719-04122008><FONT face=Verdana color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=980191719-04122008><FONT face="Courier New" size=2>quizData = templateData.quiz[0]; // non-randomized questions</FONT></SPAN></DIV>
<DIV><FONT face="Courier New"></FONT> </DIV>
<DIV dir=ltr align=left><SPAN class=980191719-04122008><FONT face=Verdana size=2><FONT face="Courier New">randomQuizData = templateData.quiz[0]; // for randomized questions<BR>randomQuizData.question.randomize(); // randomize the list of questions</FONT>.<BR></FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=980191719-04122008><FONT face=Verdana color=#0000ff size=2>All of the questions are between the <quiz> </quiz> tags, and there is only one set of those. To indicate which lesson the question is for, I have an attribute for the <question> tag (lesson="1", lesson="2", etc.). Then I try to get just the lesson 1 questions with:</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=980191719-04122008><FONT face=Verdana color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=980191719-04122008><FONT face="Courier New" size=2>// create arrays for lesson 1 quiz<BR>lesson1quiz = new Array ();<BR>wrapupQbuilt = new Array (); // for questions<BR>wrapupBuilt = new Array (); // for question answers<BR>wrapupTracking = new Array ();<BR>wrapupAnswers = new Array ();</FONT></SPAN></DIV>
<DIV><FONT face="Courier New"></FONT> </DIV>
<DIV dir=ltr align=left><SPAN class=980191719-04122008><FONT face="Courier New" size=2>lesson1Counter = 0; // counter for number of questions</FONT></SPAN></DIV>
<DIV><FONT face="Courier New"></FONT> </DIV>
<DIV dir=ltr align=left><SPAN class=980191719-04122008><FONT face="Courier New" size=2>// loop through all questions to get lesson 1<BR>for (i = 0; i < quizData.question.length; i++) {</FONT></SPAN></DIV>
<DIV><FONT face="Courier New"></FONT> </DIV>
<DIV dir=ltr align=left><SPAN class=980191719-04122008><FONT face="Courier New" size=2> if (quizData.question[i].lesson == '1') {<BR> <BR> lesson1quiz[lesson1Counter].question = quizData.question[i];<BR> lesson1Counter++;</FONT></SPAN></DIV>
<DIV><FONT face="Courier New"></FONT> </DIV>
<DIV dir=ltr align=left><SPAN class=980191719-04122008><FONT face="Courier New" size=2> } // end of quizData.question[i] conditional</FONT></SPAN></DIV>
<DIV><FONT face="Courier New"></FONT> </DIV>
<DIV dir=ltr align=left><SPAN class=980191719-04122008><FONT face="Courier New" size=2> myCounter = i + 1;</FONT></SPAN></DIV>
<DIV><FONT face="Courier New"></FONT> </DIV>
<DIV dir=ltr align=left><SPAN class=980191719-04122008><FONT face="Courier New" size=2>} // end of for loop</FONT></SPAN></DIV>
<DIV><FONT face="Courier New"></FONT> </DIV>
<DIV dir=ltr align=left><SPAN class=980191719-04122008><FONT face="Courier New" size=2>// create the right number of questions<BR>if (wrapupQbuilt[lesson1Counter] != 'true') {<BR> icon.nextSibling.childNodes[6].childNodes[0].childNodes[2].childNodes[0].childNodes[1].duplicate(lesson1Counter-1);<BR>}<BR>wrapupQbuilt[lesson1Counter] = 'true';</FONT></SPAN></DIV>
<DIV><SPAN class=980191719-04122008><FONT face=Verdana color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=980191719-04122008><FONT face=Verdana color=#0000ff size=2>But when I print lesson1quiz.length for debugging purposes, it prints 0, I was expecting it to print 2. Yet if I hard code the index of the lesson1quiz to get a question, it does appear. Hard code 0 and it pulls the second question, hard code 1 and it prints the first question (backwards from what I expected, but the order isn't important), so there must be something in the lesson1quiz array.</FONT></SPAN></DIV>
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<DIV><SPAN class=980191719-04122008><FONT face=Verdana color=#0000ff size=2>Paul</DIV>
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<FONT face=Tahoma size=2><B>From:</B> xerte-bounces@lists.nottingham.ac.uk [mailto:xerte-bounces@lists.nottingham.ac.uk] <B>On Behalf Of </B>Julian Tenney<BR><B>Sent:</B> Thursday, December 04, 2008 12:58 AM<BR><B>To:</B> Xerte discussion list<BR><B>Subject:</B> RE: [Xerte] Having problems duplicating nodes<BR></FONT><BR></DIV>
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<P class=MsoNormal><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">What you describe sounds right. I think the index is correct (and that’ backed up by the fact you use the same var to display the current page number to the user).</SPAN></P>
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<P class=MsoNormal><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">So if that is indeed correct, then it must be an issue with reading the data out of the xml data. Are you using th index in the right part of the templateData path?</SPAN></P>
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<P class=MsoNormal style="MARGIN-LEFT: 36pt"><B><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'">From:</SPAN></B><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'"> xerte-bounces@lists.nottingham.ac.uk [mailto:xerte-bounces@lists.nottingham.ac.uk] <B>On Behalf Of </B>Paul Swanson<BR><B>Sent:</B> Wednesday, December 03, 2008 10:04 PM<BR><B>To:</B> Xerte discussion list<BR><B>Subject:</B> RE: [Xerte] Having problems duplicating nodes</SPAN></P></DIV></DIV>
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<P class=MsoNormal style="MARGIN-LEFT: 36pt"><SPAN style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: 'Verdana','sans-serif'">Well, apparently I was. I had the duplicate code in the entry frame of lesson 1, so I guess it was executing each time I moved from page to page in lesson 1? I moved the code to just above the interface icon (so it can only run once), made the necessary changes to the childNodes structure, and it was still acting funny. I then found that I had both a variable and an icon id of 'lesson1Counter' so it's no wonder it was acting inconsistently. ;o) I fixed that and now I'm consistently getting the correct number of question nodes.</SPAN></P>
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<P class=MsoNormal style="MARGIN-LEFT: 36pt"><SPAN style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: 'Verdana','sans-serif'">I still have one problem though: it only displays one question. When I get to the first question node, it displays the question correctly, the second node displays the same question, and if I back up to the first question node, it's blank. Here is the code where I get the question number:</SPAN></P>
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<P class=MsoNormal style="MARGIN-LEFT: 36pt"><SPAN style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: 'Courier New'">questIndex = icon.parentNode.index() - 1;</SPAN></P>
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<P class=MsoNormal style="MARGIN-LEFT: 36pt"><SPAN style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: 'Verdana','sans-serif'">The script icon with this code is the first icon in the proto Wrap Up page (what I was calling the question node above), and the proto Wrap Up page is the second child of the wrap up framework (the Entry Frame being the first child), so questIndex should be 0 for the first question, and 1 for the next, right? I'm using questIndex+1 for a page counter, and that is correctly displaying 1 for question 1 and 2 for question 2, but the questions don't change. Any insight on that?</SPAN></P>
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<P class=MsoNormal style="MARGIN-LEFT: 36pt"><SPAN style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: 'Verdana','sans-serif'">Thanks for all your help!</SPAN></P>
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<P class=MsoNormal style="MARGIN-BOTTOM: 12pt; MARGIN-LEFT: 36pt; MARGIN-RIGHT: 0cm"><B><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'">From:</SPAN></B><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'"> xerte-bounces@lists.nottingham.ac.uk [mailto:xerte-bounces@lists.nottingham.ac.uk] <B>On Behalf Of </B>Julian Tenney<BR><B>Sent:</B> Wednesday, December 03, 2008 12:45 PM<BR><B>To:</B> Xerte discussion list<BR><B>Subject:</B> RE: [Xerte] Having problems duplicating nodes</SPAN><SPAN lang=EN-US></SPAN></P>
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<P class=MsoNormal style="MARGIN-LEFT: 36pt"><SPAN style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Arial','sans-serif'">You're not duplicating icons more than once are you? When you call duplicate, you are manipulatingthe xml in the rlo file:</SPAN></P></DIV>
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<P class=MsoNormal style="MARGIN-LEFT: 36pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">//this makes n + 1 children on icon.nextSibling:</SPAN></P></DIV>
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<P class=MsoNormal style="MARGIN-LEFT: 36pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">icon.nextSibling.firstChild.duplicate(n);</SPAN></P></DIV>
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<P class=MsoNormal style="MARGIN-LEFT: 36pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">//call it again (perhaps because we revisit this page):</SPAN></P></DIV>
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<P class=MsoNormal style="MARGIN-LEFT: 36pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">icon.nextSibling.firstChild.duplicate(n);</SPAN></P></DIV>
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<P class=MsoNormal style="MARGIN-LEFT: 36pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">//how many children?</SPAN></P></DIV>
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<P class=MsoNormal style="MARGIN-LEFT: 36pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">debug(icon.nextSibling.childNodes.length); //duh. Twice as many as I needed.</SPAN></P></DIV>
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<P class=MsoNormal style="MARGIN-LEFT: 36pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">//so, only let the duplicate run once, 'cos if we revisit a page, we'll end up with too many xml nodes...</SPAN></P></DIV>
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<P class=MsoNormal style="MARGIN-LEFT: 36pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">if (someFlag != true){</SPAN></P></DIV>
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<P class=MsoNormal style="MARGIN-LEFT: 36pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'"> duplicate(....make icons here...);</SPAN></P></DIV>
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<P class=MsoNormal style="MARGIN-LEFT: 36pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'"> someFlag = true;</SPAN></P></DIV>
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<P class=MsoNormal style="MARGIN-LEFT: 36pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">}</SPAN></P></DIV>
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<P class=MsoNormal style="MARGIN-LEFT: 36pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">//i tend to do it like this, so duplicate code in icon will only ever run once:</SPAN></P></DIV>
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<P class=MsoNormal style="MARGIN-LEFT: 36pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">if (icon.attributes.built != 'true'){</SPAN></P></DIV>
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<P class=MsoNormal style="MARGIN-LEFT: 36pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'"> //duplicate and other logic here</SPAN></P></DIV>
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<P class=MsoNormal style="MARGIN-LEFT: 36pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'"> icon.attributes.built = 'true';</SPAN></P></DIV>
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<P class=MsoNormal style="MARGIN-LEFT: 36pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">}</SPAN></P></DIV>
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<P class=MsoNormal style="MARGIN-LEFT: 36pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">sort that out and the see if you've got any issues left. The thing is that 'icon' refers to the underlying xml node - that is key to understanding what's happening with duplicate(); make sure the code that builds the piece only runs once.</SPAN></P></DIV>
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<P class=MsoNormal style="MARGIN-LEFT: 36pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">J</SPAN></P></DIV></DIV>
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