!!! Sortable wiki tables

This [JSPWikiStyle] allows you to make tables sortable by enclosing them inside a %~%sortable block.\\
Just click the column header and your table is sorted without round-trip to the server.

!!Usage

Enclose your tables in %~%sortable tags.
Make sure your table starts with a row of all header cells ( wikisyntax: ~|~| ).
Now move your the mouse over one of the clickable header cells.
You'll see a tool-tip and a changed mouse pointer.
Click the column header to sort, clicking again will reverse the sort order.
The sort algorithm will auto-guess the data type of your column -- date, numeric or string -- 
and adjust the sorting algorithm accordingly !

{{{
%%sortable
|| Title || Author || Published   || Edition
| book1  |  zappy  |  25-Feb-2005 |  5
| book2  |  happy  |  25-Jan-2005 |  19
| book3  |  pappy  |  23-Mar-2005 |  06
| book4  |  dappy  |  21-Apr-2005 |  199
| book5  |  rappy  |  25-Jul-2005 |  017
| my book | comedy |  25-Jul-2005 |  013
%%
}}}

Reality check:
%%sortable
|| Title || Author || Published   || Edition
| book1  |  zappy  |  25-Feb-2005 |  5
| book2  |  happy  |  25-Jan-2005 |  19
| book3  |  pappy  |  23-Mar-2005 |  06
| book4  |  dappy  |  21-Apr-2005 |  199
| book5  |  rappy  |  25-Jul-2005 |  017
%%

No Header - Still Sorts?
| book1  |  zappy  |  25-Feb-2005 |  5
| book2  |  happy  |  25-Jan-2005 |  19
| book3  |  pappy  |  23-Mar-2005 |  06
| book4  |  dappy  |  21-Apr-2005 |  199
| book5  |  rappy  |  25-Jul-2005 |  017


%%tabbedSection
%%tab-Implementation
The implementation was inspired by the excellent javascript created by Erik Arvidsson.
See [http://webfx.eae.net/dhtml/sortabletable/sortabletable.html].

However, I refactored it completely so it better fits with JSPWiki pages.
JSPWiki tables dont use ''thead'' or ''tbody'' tags; 
it needed to be more flexible to change the appearance of 
the sortAscending/sortDescending controls through css; allowing fine control
in different skins; and I wanted 
automatic recognition of the data-type of the column to be sorted.

%%
%%tab-Javascript
Check out the {{scripts/jspwiki-common.js}} file for the actual implementation.

The needed javascript is very powerful, and still pretty small.
Everything is included in the ''Sortable'' object to keep the .js namespace unpolluted.

The ''onPageLoad'' does the initialisation after the page is loaded.
(make sure to add a call to this function in your ''window.onload()'' handler somewhere)
It will track all ''%~%sortable'' elements and process its first ''TABLE'' element.
An ''onclick()'' handler is added to each column header which points to the heart of the
javascript: the ''Sortable.sort()'' function.

The sort function has four major steps :
# Validate the header row and checking which column was clicked
# Copy the table body rows into a javascript ''array'' and
  at the same time find out the data-type of the column to be sorted
  being ''date'', ''number'' or (default) ''string'' format
# Do the actual sort or reverse sort
# Put the sorted array back into the DOM tree of the document

The ''Sortable.convert()'' and ''Sortable.createCompare()'' are helper functions
for data-type conversion and for creation of appropriate comparsion routines used by the javascript sort engine.
%%
%%tab-CSS
Check out the {{templates/default/jspwiki.css}} file for the css definitions. 

The following CSS selectors can be changed if needed:
* column headers which are clicable, but not yet sorted, get the style ''.sort''
* column headers, which are sorted ascending, get the style ''.sortAscending''. 
* column headers, which are sorted descending, get the style ''.sortDescending''. 
%%
%%