Thanks for writing this code, but djangosnippets[1] is probably a better place for it to go. On this mailing list it'll get lost or forgotten with all of the other posts.
[1] http://www.djangosnippets.org/ On Feb 16, 10:17 pm, Yosifov Pavel <[EMAIL PROTECTED]> wrote: > May be this 2 tags (table generating with any "shape", flat index in > nested loops) are helpful for somebody? > > Example of usage in django template: > > ===cut=== > {# List filials must exists in context! #} > {% load table %} > <table border="0" width="100%"> > {% table filials "3x?" %} > {% for row in table_obj %} > <tr> > {% for record in row %} > {% if record %} > <td class="mf_table_cell" > onclick="selcell('filial_{{forloop|flatindex}}')"> > <img src="/art/filial.gif" style="margin- > bottom: 4px;"/><br/> > <span id="filial_{{forloop|flatindex}}" > class="mf_table_unselcell">{{ record }}</span> > </td> > {% else %} > <td class="mf_table_cell"> > > </td> > {% endif %} > {% endfor %} > </tr> > {% endfor %} > {% endtable %} > </table> > ===cut=== > > Python code: > > ===cut=== > from django import template > from django.shortcuts import render_to_response > from django.template.loader import get_template > > def reshape( lst, ncols, nrows, horiz=True ): > """Change shape of list lst (like APL, J, K, NumPy). > Return list of lists: ncols x nrows. horiz - is the > table direction (horizontal or vertical if horiz is > False). Empty cells will be with '' > """ > if not ncols and not nrows: return lst > > w = ncols or len(lst)/nrows + (1 if len(lst)%nrows else 0) > h = nrows or len(lst)/ncols + (1 if len(lst)%ncols else 0) > > if horiz: > flatten = lambda irow, icol: icol + irow*w > else: > flatten = lambda irow, icol: irow + icol*h > > rows = [] > for irow in range( h ): > col = [] > for icol in range( w ): > iflat = flatten( irow, icol ) > el = '' if iflat >= len(lst) else lst[iflat] > col.append( el ) > rows.append( col ) > > return rows > > register = template.Library() > > @register.tag > def table( parser, token ): > """ Push in context 'table_obj' object - list of lists, result > of reshape function (see it)""" > try: > # lst - name of the list in the context, shape is string like > 'H:4x?'|'V:2x2'|'?x3' > # 'H' - horiz direction, 'V' - vertical direction, '?' - > computable size, digit - > # fixed size (see reshape function!) > tag, lst, shape = token.split_contents() > except ValueError: > sx = 'tag %r requires two arguments'%token.contents[0] > raise template.TemplateSyntaxError( sx ) > shape = shape[1:-1].upper() # cut .. from ".." > if shape.startswith( 'V:' ): > horiz = False > shape = shape[2:] > elif shape.startswith( 'H:' ): > horiz = True > shape = shape[2:] > else: > horiz = True > w,h = shape.split( 'X' ) > w = None if w == '?' else int(w) > h = None if h == '?' else int(h) > if not h and not w: > raise template.TemplateSyntaxError( 'only one axis may be > unknown (?)' ) > > nodes = parser.parse( ('endtable',) ) > parser.delete_first_token() > return TableNode( nodes, lst, w, h, horiz ) > > class TableNode( template.Node ): > def __init__( self, nodes, lst, w, h, horiz ): > self.nodes = nodes > self.lst = lst > self.w = w > self.h = h > self.horiz = horiz > def render( self, context ): > # get list from context by it's name > res = reshape( context[self.lst], self.w, self.h, self.horiz ) > context.push() > context[ 'table_obj' ] = res > txt = self.nodes.render( context ) > context.pop() > return txt > > @register.filter > def flatindex( forloop ): > """Existed in the nested loops return flat index > (index of flat list). For example: > like in C N-th dimension array may look like > flat array with ONE, flat index. This tag generate > this flat index for nested loops in django template (see nested {% > for...%})""" > loop = forloop > level = 0 > ret = 0 > nestedlen = 1 > while True: > if level == 0: > ret += loop['counter0'] > # length of current level * size of previous levels is > # "weight" of ranking level. Ranking level add > # nestedlen to flatindex if move by 1 (like hypercube). > nestedlen *= loop['counter0'] + loop['revcounter0'] + 1 > else: > ret += loop['counter0']*nestedlen > > # go to next-up level > parentloop = loop.get('parentloop', None) > if parentloop: > loop = parentloop > else: > break > level += 1 > return ret > ===cut=== > > Best regards > /Yosifov Pavel --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-users@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/django-users?hl=en -~----------~----~----~----~------~----~------~--~---
