[Xerte] Problem getting accurate count of pages in framework

[Paul Swanson]

I still have not got this to work. What icon id should be used for the
icon property of the Event Interaction? I've tried the icon id of the
framework, the icon id of the page holding the framework, rootIcon, and
the icon id of the first child page of the framework -- in the first
three cases I get 'undefined' as the value of aboutDPFrame.pages.length,
and in the last case I get 0 (which doesn't surprise me). And should the
onPageOpen be within the onInit event, or should that be a separate
event?
 
Paul


________________________________

	From: xerte-bounces at lists.nottingham.ac.uk
[mailto:xerte-bounces at lists.nottingham.ac.uk] On Behalf Of Julian Tenney
	Sent: Wednesday, October 08, 2008 2:43 PM
	To: Xerte discussion list
	Subject: RE: [Xerte] Problem getting accurate count of pages in
framework
	
	
	An .rlo is an xml tree. It is parsed sideways like an AW dive.
Content is created as each node is encountered:
	 
	//this is really what the engine does...
	function parse(node){ //a node from the .rlo file's xml
	 
	  //do things with the node - like create an icon or execute
some script
	  //instantiate classes using the information from the xml node
to create icons
	  //icons will intialise before this code continues
	  //script icons are executed here too, in engine scope
	  
	  //then loop over each child of node, calling this function
recursively
	  for (var i = 0; i < node.childNodes.length; i++){
	    parse(node.childNodes[i]);
	  }
	 
	  //decide whether to break or continue?
	}
	 
	As the tree is parsed, the entry frame and it's content is
created. At this point the rest of the framework's xml hasn't been
parsed.
	 
	Flow moves to the next child node of the framework's xml - the
first page. The page is created and it's content's parsed. The second
page hasn't been parsed yet, so 1 of 1 is expected. 
	 
	Only then are the rest of the pages are created - but - by
definition - you cannot place code in page 1 that will execute
afterwards.
	 
	for that very reason there is the onInit event. This event is
broadcast by rootIcon when the initial parse IS complete. Use this in
the entry frame to initialise your interface, and use onPageClose /
onPageOpen rather than have code in each page to set the interface
items. onInit will correct give you fw.pages.lenth, and onPageClose /
onPageOpen are more elegant / easier to maintain than code on each page.
	 
	J

________________________________

	From: xerte-bounces at lists.nottingham.ac.uk on behalf of Paul
Swanson
	Sent: Wed 08/10/2008 17:53
	To: xerte at lists.nottingham.ac.uk
	Subject: [Xerte] Problem getting accurate count of pages in
framework
	
	

	I'm adding a "Page x of y" to a framework, and I'm not getting
the correct value for y (the number of pages in the framework).

	I'm using an Entry Frame to the framework, and within that is a
text icon with an id of aboutDPCounter. The framework id is
aboutDPFrame. On each page, I include a script icon with the following:

	aboutDPCounter.setText('Page ' + (aboutDPFrame.currentPage + 1)
+ ' of ' + aboutDPFrame.pages.length; 

	When I enter the framework, which currently has two pages of
content, the page counter reads "Page 1 of 1." When I go to the next
page, it reads "Page 2 of 2," and when I back to the first page it reads
"Page 1 of 2." If I then advance to page 2, it reads "Page 2 of 2."

	What's going on? I would expect myFramework.pages.length would
be consistent. It appears as though it doesn't count the page until
you've actually navigated to it.

	_____________________________ 

	 Paul Swanson 
	 Instructional Designer 
	 Harland Financial Solutions 
	 800.274.7280 Ext. 2462 
	 Paul.Swanson at harlandfs.com 
	_____________________________ 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.nottingham.ac.uk/pipermail/xerte/attachments/20081013/9a3c2181/attachment.html