Metadata-Version: 1.1
Name: z3c.table
Version: 1.0.0
Summary: Modular table rendering implementation for Zope3
Home-page: http://pypi.python.org/pypi/z3c.table
Author: Stephan Richter, Roger Ineichen and the Zope Community
Author-email: zope-dev@zope.org
License: ZPL 2.1
Description: This package provides a modular table rendering implementation for Zope3.
        
        
        =========
        z3c Table
        =========
        
        .. contents::
        
        The goal of this package is to offer a modular table rendering library. We use
        the content provider pattern and the column are implemented as adapters which
        will give us a powerful base concept.
        
        Some important concepts we use
        ------------------------------
        
        - separate implementation in update render parts, This allows to manipulate
          data after update call and before we render them.
        
        - allow to use page templates if needed. By default all is done in python.
        
        - allow to use the rendered batch outside the existing table HTML part.
        
        No skins
        --------
        
        This package does not provide any kind of template or skin support. Most the
        time if you need to render a table, you will use your own skin concept. This means
        you can render the table or batch within your own templates. This will ensure
        that we have as few dependencies as possible in this package and the package
        can get reused with any skin concept.
        
        Note
        ----
        
        As you probably know, batching is only possible after sorting columns. This is
        a nightmare if it comes to performance. The reason is, all data need to get
        sorted before the batch can start at the given position. And sorting can most
        of the time only be done by touching each object. This means you have to be careful
        if you are using a large set of data, even if you use batching.
        
        Sample data setup
        -----------------
        
        Let's create a sample container which we can use as our iterable context:
        
          >>> from zope.container import btree
          >>> class Container(btree.BTreeContainer):
          ...     """Sample container."""
          ...     __name__ = u'container'
          >>> container = Container()
        
        and set a parent for the container:
        
          >>> root['container'] = container
        
        and create a sample content object which we use as container item:
        
          >>> class Content(object):
          ...     """Sample content."""
          ...     def __init__(self, title, number):
          ...         self.title = title
          ...         self.number = number
        
        Now setup some items:
        
          >>> container[u'first'] = Content('First', 1)
          >>> container[u'second'] = Content('Second', 2)
          >>> container[u'third'] = Content('Third', 3)
        
        
        Table
        -----
        
        Create a test request and represent the table:
        
          >>> from zope.publisher.browser import TestRequest
          >>> from z3c.table import table
          >>> request = TestRequest()
          >>> plainTable = table.Table(container, request)
          >>> plainTable.cssClassSortedOn = None
        
        Now we can update and render the table. As you can see with an empty container
        we will not get anything that looks like a table. We just get an empty string:
        
          >>> plainTable.update()
          >>> plainTable.render()
          u''
        
        
        Column Adapter
        --------------
        
        We can create a column for our table:
        
          >>> import zope.component
          >>> from z3c.table import interfaces
          >>> from z3c.table import column
        
          >>> class TitleColumn(column.Column):
          ...
          ...     weight = 10
          ...     header = u'Title'
          ...
          ...     def renderCell(self, item):
          ...         return u'Title: %s' % item.title
        
        Now we can register the column:
        
          >>> zope.component.provideAdapter(TitleColumn,
          ...     (None, None, interfaces.ITable), provides=interfaces.IColumn,
          ...      name='firstColumn')
        
        Now we can render the table again:
        
          >>> plainTable.update()
          >>> print plainTable.render()
          <table>
            <thead>
              <tr>
                <th>Title</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td>Title: First</td>
              </tr>
              <tr>
                <td>Title: Second</td>
              </tr>
              <tr>
                <td>Title: Third</td>
              </tr>
            </tbody>
          </table>
        
        We can also use the predefined name column:
        
          >>> zope.component.provideAdapter(column.NameColumn,
          ...     (None, None, interfaces.ITable), provides=interfaces.IColumn,
          ...      name='secondColumn')
        
        Now we will get an additional column:
        
          >>> plainTable.update()
          >>> print plainTable.render()
          <table>
            <thead>
              <tr>
                <th>Name</th>
                <th>Title</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td>first</td>
                <td>Title: First</td>
              </tr>
              <tr>
                <td>second</td>
                <td>Title: Second</td>
              </tr>
              <tr>
                <td>third</td>
                <td>Title: Third</td>
              </tr>
            </tbody>
          </table>
        
        
        Colspan
        -------
        
        Now let's show how we can define a colspan condition of 2 for a column:
        
          >>> class ColspanColumn(column.NameColumn):
          ...
          ...     weight = 999
          ...
          ...     def getColspan(self, item):
          ...         # colspan condition
          ...         if item.__name__ == 'first':
          ...             return 2
          ...         else:
          ...             return 0
          ...
          ...     def renderHeadCell(self):
          ...         return u'Colspan'
          ...
          ...     def renderCell(self, item):
          ...         return u'colspan: %s' % item.title
        
        Now we register this column adapter as colspanColumn:
        
          >>> zope.component.provideAdapter(ColspanColumn,
          ...     (None, None, interfaces.ITable), provides=interfaces.IColumn,
          ...      name='colspanColumn')
        
        Now you can see that the colspan of the ColspanAdapter is larger than the table.
        This will raise a ValueError:
        
          >>> plainTable.update()
          Traceback (most recent call last):
          ...
          ValueError: Colspan for column '<ColspanColumn u'colspanColumn'>' is larger than the table.
        
        But if we set the column as first row, it will render the colspan correctly:
        
          >>> class CorrectColspanColumn(ColspanColumn):
          ...     """Colspan with correct weight."""
          ...
          ...     weight = 0
        
        Register and render the table again:
        
          >>> zope.component.provideAdapter(CorrectColspanColumn,
          ...     (None, None, interfaces.ITable), provides=interfaces.IColumn,
          ...      name='colspanColumn')
        
          >>> plainTable.update()
          >>> print plainTable.render()
          <table>
            <thead>
              <tr>
                <th>Colspan</th>
                <th>Name</th>
                <th>Title</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td colspan="2">colspan: First</td>
                <td>Title: First</td>
              </tr>
              <tr>
                <td>colspan: Second</td>
                <td>second</td>
                <td>Title: Second</td>
              </tr>
              <tr>
                <td>colspan: Third</td>
                <td>third</td>
                <td>Title: Third</td>
              </tr>
            </tbody>
          </table>
        
        Setup columns
        -------------
        
        The existing implementation allows us to define a table in a class without
        using the modular adapter pattern for columns.
        
        First we need to define a column which can render a value for our items:
        
          >>> class SimpleColumn(column.Column):
          ...
          ...     weight = 0
          ...
          ...     def renderCell(self, item):
          ...         return item.title
        
        Let's define our table which defines the columns explicitly. you can also see
        that we do not return the columns in the correct order:
        
          >>> class PrivateTable(table.Table):
          ...     cssClassSortedOn = None
          ...
          ...     def setUpColumns(self):
          ...         firstColumn = TitleColumn(self.context, self.request, self)
          ...         firstColumn.__name__ = u'title'
          ...         firstColumn.weight = 1
          ...         secondColumn = SimpleColumn(self.context, self.request, self)
          ...         secondColumn.__name__ = u'simple'
          ...         secondColumn.weight = 2
          ...         secondColumn.header = u'The second column'
          ...         return [secondColumn, firstColumn]
        
        Now we can create, update and render the table and see that this renders a nice
        table too:
        
          >>> privateTable = PrivateTable(container, request)
          >>> privateTable.update()
          >>> print privateTable.render()
          <table>
            <thead>
              <tr>
                <th>Title</th>
                <th>The second column</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td>Title: First</td>
                <td>First</td>
              </tr>
              <tr>
                <td>Title: Second</td>
                <td>Second</td>
              </tr>
              <tr>
                <td>Title: Third</td>
                <td>Third</td>
              </tr>
            </tbody>
          </table>
        
        
        Cascading Style Sheet
        ---------------------
        
        Our table and column implementation supports css class assignment. Let's define
        a table and columns with some css class values:
        
          >>> class CSSTable(table.Table):
          ...
          ...     cssClasses = {'table': 'table',
          ...                   'thead': 'thead',
          ...                   'tbody': 'tbody',
          ...                   'th': 'th',
          ...                   'tr': 'tr',
          ...                   'td': 'td'}
          ...     cssClassSortedOn = None
          ...
          ...     def setUpColumns(self):
          ...         firstColumn = TitleColumn(self.context, self.request, self)
          ...         firstColumn.__name__ = u'title'
          ...         firstColumn.__parent__ = self
          ...         firstColumn.weight = 1
          ...         firstColumn.cssClasses = {'th':'thCol', 'td':'tdCol'}
          ...         secondColumn = SimpleColumn(self.context, self.request, self)
          ...         secondColumn.__name__ = u'simple'
          ...         secondColumn.__parent__ = self
          ...         secondColumn.weight = 2
          ...         secondColumn.header = u'The second column'
          ...         return [secondColumn, firstColumn]
        
        Now let's see if we got the css class assigned which we defined in the table and
        column. Note that the ``th`` and ``td`` got CSS declarations from the table and
        from the column:
        
          >>> cssTable = CSSTable(container, request)
          >>> cssTable.update()
          >>> print cssTable.render()
          <table class="table">
            <thead class="thead">
              <tr class="tr">
                <th class="thCol th">Title</th>
                <th class="th">The second column</th>
              </tr>
            </thead>
            <tbody class="tbody">
              <tr class="tr">
                <td class="tdCol td">Title: First</td>
                <td class="td">First</td>
              </tr>
              <tr class="tr">
                <td class="tdCol td">Title: Second</td>
                <td class="td">Second</td>
              </tr>
              <tr class="tr">
                <td class="tdCol td">Title: Third</td>
                <td class="td">Third</td>
              </tr>
            </tbody>
          </table>
        
        
        Alternating table
        -----------------
        
        We offer built in support for alternating table rows based on even and odd CSS
        classes. Let's define a table including other CSS classes. For even/odd support,
        we only need to define the ``cssClassEven`` and ``cssClassOdd`` CSS classes:
        
          >>> class AlternatingTable(table.Table):
          ...
          ...     cssClasses = {'table': 'table',
          ...                   'thead': 'thead',
          ...                   'tbody': 'tbody',
          ...                   'th': 'th',
          ...                   'tr': 'tr',
          ...                   'td': 'td'}
          ...
          ...     cssClassEven = u'even'
          ...     cssClassOdd = u'odd'
          ...     cssClassSortedOn = None
          ...
          ...     def setUpColumns(self):
          ...         firstColumn = TitleColumn(self.context, self.request, self)
          ...         firstColumn.__name__ = u'title'
          ...         firstColumn.__parent__ = self
          ...         firstColumn.weight = 1
          ...         firstColumn.cssClasses = {'th':'thCol', 'td':'tdCol'}
          ...         secondColumn = SimpleColumn(self.context, self.request, self)
          ...         secondColumn.__name__ = u'simple'
          ...         secondColumn.__parent__ = self
          ...         secondColumn.weight = 2
          ...         secondColumn.header = u'The second column'
          ...         return [secondColumn, firstColumn]
        
        Now update and render the new table. As you can see the given ``tr`` class is
        added to the even and odd classes:
        
          >>> alternatingTable = AlternatingTable(container, request)
          >>> alternatingTable.update()
          >>> print alternatingTable.render()
          <table class="table">
            <thead class="thead">
              <tr class="tr">
                <th class="thCol th">Title</th>
                <th class="th">The second column</th>
              </tr>
            </thead>
            <tbody class="tbody">
              <tr class="even tr">
                <td class="tdCol td">Title: First</td>
                <td class="td">First</td>
              </tr>
              <tr class="odd tr">
                <td class="tdCol td">Title: Second</td>
                <td class="td">Second</td>
              </tr>
              <tr class="even tr">
                <td class="tdCol td">Title: Third</td>
                <td class="td">Third</td>
              </tr>
            </tbody>
          </table>
        
        
        Class based Table setup
        -----------------------
        
        There is a more elegant way to define table rows at class level. We offer
        a method which you can use if you need to define some columns called
        ``addColumn``. Before we define the table. let's define some cell renderer:
        
          >>> def headCellRenderer():
          ...     return u'My items'
        
          >>> def cellRenderer(item):
          ...     return u'%s item' % item.title
        
        Now we can define our table and use the custom cell renderer:
        
          >>> class AddColumnTable(table.Table):
          ...
          ...     cssClasses = {'table': 'table',
          ...                   'thead': 'thead',
          ...                   'tbody': 'tbody',
          ...                   'th': 'th',
          ...                   'tr': 'tr',
          ...                   'td': 'td'}
          ...
          ...     cssClassEven = u'even'
          ...     cssClassOdd = u'odd'
          ...     cssClassSortedOn = None
          ...
          ...     def setUpColumns(self):
          ...         return [
          ...             column.addColumn(self, TitleColumn, u'title',
          ...                              cellRenderer=cellRenderer,
          ...                              headCellRenderer=headCellRenderer,
          ...                              weight=1, colspan=0),
          ...             column.addColumn(self, SimpleColumn, name=u'simple',
          ...                              weight=2, header=u'The second column',
          ...                              cssClasses = {'th':'thCol', 'td':'tdCol'})
          ...             ]
        
        Add some more content::
        
          >>> container[u'fourth'] = Content('Fourth', 4)
          >>> container[u'zero'] = Content('Zero', 0)
        
          >>> addColumnTable = AddColumnTable(container, request)
          >>> addColumnTable.update()
          >>> print addColumnTable.render()
          <table class="table">
            <thead class="thead">
              <tr class="tr">
                <th class="th">My items</th>
                <th class="thCol th">The second column</th>
              </tr>
            </thead>
            <tbody class="tbody">
              <tr class="even tr">
                <td class="td">First item</td>
                <td class="tdCol td">First</td>
              </tr>
              <tr class="odd tr">
                <td class="td">Fourth item</td>
                <td class="tdCol td">Fourth</td>
              </tr>
              <tr class="even tr">
                <td class="td">Second item</td>
                <td class="tdCol td">Second</td>
              </tr>
              <tr class="odd tr">
                <td class="td">Third item</td>
                <td class="tdCol td">Third</td>
              </tr>
              <tr class="even tr">
                <td class="td">Zero item</td>
                <td class="tdCol td">Zero</td>
              </tr>
            </tbody>
          </table>
        
        As you can see the table columns provide all attributes we set in the addColumn
        method:
        
          >>> titleColumn = addColumnTable.rows[0][0][1]
          >>> titleColumn
          <TitleColumn u'title'>
        
          >>> titleColumn.__name__
          u'title'
        
          >>> titleColumn.__parent__
          <AddColumnTable None>
        
          >>> titleColumn.colspan
          0
        
          >>> titleColumn.weight
          1
        
          >>> titleColumn.header
          u'Title'
        
          >>> titleColumn.cssClasses
          {}
        
        and the second column:
        
          >>> simpleColumn = addColumnTable.rows[0][1][1]
          >>> simpleColumn
          <SimpleColumn u'simple'>
        
          >>> simpleColumn.__name__
          u'simple'
        
          >>> simpleColumn.__parent__
          <AddColumnTable None>
        
          >>> simpleColumn.colspan
          0
        
          >>> simpleColumn.weight
          2
        
          >>> simpleColumn.header
          u'The second column'
        
          >>> simpleColumn.cssClasses
          {'td': 'tdCol', 'th': 'thCol'}
        
        
        Headers
        -------
        
        We can change the rendering of the header of, e.g, the Title column by
        registering a IHeaderColumn adapter. This may be useful for adding links to
        column headers for an existing table implementation.
        
        We'll use a fresh almost empty container.:
        
          >>> container = Container()
          >>> root['container-1'] = container
          >>> container[u'first'] = Content('First', 1)
          >>> container[u'second'] = Content('Second', 2)
          >>> container[u'third'] = Content('Third', 3)
        
          >>> class myTableClass(table.Table):
          ...     cssClassSortedOn = None
        
          >>> myTable = myTableClass(container, request)
        
          >>> class TitleColumn(column.Column):
          ...
          ...     header = u'Title'
          ...
          ...     def renderCell(self, item):
          ...         return item.title
        
        Now we can register a column adapter directly to our table class:
        
          >>> zope.component.provideAdapter(TitleColumn,
          ...     (None, None, myTableClass), provides=interfaces.IColumn,
          ...      name='titleColumn')
        
        And add a registration for a column header - we'll use here the provided generic
        sorting header implementation:
        
          >>> from z3c.table.header import SortingColumnHeader
          >>> zope.component.provideAdapter(SortingColumnHeader,
          ...     (None, None, interfaces.ITable, interfaces.IColumn),
          ...     provides=interfaces.IColumnHeader)
        
        Now we can render the table and we shall see a link in the header. Note that it
        is set to switch to descending as the table initially will display the first
        column as ascending:
        
          >>> myTable.update()
          >>> print myTable.render()
          <table>
           <thead>
            <tr>
             <th><a
              href="?table-sortOrder=descending&table-sortOn=table-titleColumn-0"
              title="Sort">Title</a></th>
          ...
          </table>
        
        If the table is initially set to descending, the link should allow to switch to
        ascending again:
        
          >>> myTable.sortOrder = 'descending'
          >>> print myTable.render()
          <table>
           <thead>
            <tr>
             <th><a
              href="?table-sortOrder=ascending&table-sortOn=table-titleColumn-0"
              title="Sort">Title</a></th>
          ...
          </table>
        
        If the table is ascending but the request was descending,
        the link should allow to switch again to ascending:
        
          >>> descendingRequest = TestRequest(form={'table-sortOn': 'table-titleColumn-0',
          ...                                   'table-sortOrder':'descending'})
          >>> myTable = myTableClass(container, descendingRequest)
          >>> myTable.sortOrder = 'ascending'
          >>> myTable.update()
          >>> print myTable.render()
          <table>
           <thead>
            <tr>
             <th><a
              href="?table-sortOrder=ascending&table-sortOn=table-titleColumn-0"
              title="Sort">Title</a></th>
          ...
          </table>
        
        
        Sorting Table
        -------------
        
        Another table feature is the support for sorting data given from columns. Since
        sorting table data is an important feature, we offer this by default. But it
        only gets used if there is a ``sortOn`` value set. You can set this value at
        class level by adding a ``defaultSortOn`` value or set it as a request value.
        We show you how to do this later. We also need a columns which allows us to do
        a better sort sample. Our new sorting column will use the content items number
        value for sorting:
        
          >>> from z3c.table import column, table
          >>> class NumberColumn(column.Column):
          ...
          ...     header = u'Number'
          ...     weight = 20
          ...
          ...     def getSortKey(self, item):
          ...         return item.number
          ...
          ...     def renderCell(self, item):
          ...         return 'number: %s' % item.number
        
        
        Now let's set up a table:
        
          >>> from z3c.table.testing import TitleColumn
          >>> class SortingTable(table.Table):
          ...
          ...     def setUpColumns(self):
          ...         firstColumn = TitleColumn(self.context, self.request, self)
          ...         firstColumn.__name__ = u'title'
          ...         firstColumn.__parent__ = self
          ...         secondColumn = NumberColumn(self.context, self.request, self)
          ...         secondColumn.__name__ = u'number'
          ...         secondColumn.__parent__ = self
          ...         return [firstColumn, secondColumn]
        
        Create a container:
        
          >>> from z3c.table.testing import OrderedContainer
          >>> container = OrderedContainer()
        
        We also need some container items that we can use for sorting:
        
          >>> from z3c.table.testing import Content
          >>> container[u'first'] = Content('First', 1)
          >>> container[u'second'] = Content('Second', 2)
          >>> container[u'third'] = Content('Third', 3)
          >>> container[u'fourth'] = Content('Fourth', 4)
          >>> container[u'zero'] = Content('Zero', 0)
        
        And render them without set a ``sortOn`` value:
        
          >>> from zope.publisher.browser import TestRequest
          >>> request = TestRequest()
          >>> sortingTable = SortingTable(container, request)
          >>> sortingTable.update()
          >>> print sortingTable.render()
          <table>
            <thead>
              <tr>
                <th class="sorted-on ascending">Title</th>
                <th>Number</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td class="sorted-on ascending">Title: First</td>
                <td>number: 1</td>
              </tr>
              <tr>
                <td class="sorted-on ascending">Title: Fourth</td>
                <td>number: 4</td>
              </tr>
              <tr>
                <td class="sorted-on ascending">Title: Second</td>
                <td>number: 2</td>
              </tr>
              <tr>
                <td class="sorted-on ascending">Title: Third</td>
                <td>number: 3</td>
              </tr>
              <tr>
                <td class="sorted-on ascending">Title: Zero</td>
                <td>number: 0</td>
              </tr>
            </tbody>
          </table>
        
        Ooops, well, by default the table is sorted on the first column, ascending.
        
          >>> sortingTable.sortOn
          0
        
        Now switch off sorting, now we get the original order:
        
          >>> sortingTable.sortOn = None
          >>> sortingTable.update()
          >>> print sortingTable.render()
          <table>
            <thead>
              <tr>
                <th>Title</th>
                <th>Number</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td>Title: First</td>
                <td>number: 1</td>
              </tr>
              <tr>
                <td>Title: Second</td>
                <td>number: 2</td>
              </tr>
              <tr>
                <td>Title: Third</td>
                <td>number: 3</td>
              </tr>
              <tr>
                <td>Title: Fourth</td>
                <td>number: 4</td>
              </tr>
              <tr>
                <td>Title: Zero</td>
                <td>number: 0</td>
              </tr>
            </tbody>
          </table>
        
        
        As you can see this table doesn't provide any explicit order. Let's find out
        the index of our column that we like to sort on:
        
          >>> sortOnId = sortingTable.rows[0][1][1].id
          >>> sortOnId
          u'table-number-1'
        
        And let's use this id as ``sortOn`` value:
        
          >>> sortingTable.sortOn = sortOnId
        
        An important thing is to update the table after set an ``sortOn`` value:
        
          >>> sortingTable.update()
          >>> print sortingTable.render()
          <table>
            <thead>
              <tr>
                <th>Title</th>
                <th class="sorted-on ascending">Number</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td>Title: Zero</td>
                <td class="sorted-on ascending">number: 0</td>
              </tr>
              <tr>
                <td>Title: First</td>
                <td class="sorted-on ascending">number: 1</td>
              </tr>
              <tr>
                <td>Title: Second</td>
                <td class="sorted-on ascending">number: 2</td>
              </tr>
              <tr>
                <td>Title: Third</td>
                <td class="sorted-on ascending">number: 3</td>
              </tr>
              <tr>
                <td>Title: Fourth</td>
                <td class="sorted-on ascending">number: 4</td>
              </tr>
            </tbody>
          </table>
        
        We can also reverse the sorting order:
        
          >>> sortingTable.sortOrder = 'reverse'
          >>> sortingTable.update()
          >>> print sortingTable.render()
          <table>
            <thead>
              <tr>
                <th>Title</th>
                <th class="sorted-on reverse">Number</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td>Title: Fourth</td>
                <td class="sorted-on reverse">number: 4</td>
              </tr>
              <tr>
                <td>Title: Third</td>
                <td class="sorted-on reverse">number: 3</td>
              </tr>
              <tr>
                <td>Title: Second</td>
                <td class="sorted-on reverse">number: 2</td>
              </tr>
              <tr>
                <td>Title: First</td>
                <td class="sorted-on reverse">number: 1</td>
              </tr>
              <tr>
                <td>Title: Zero</td>
                <td class="sorted-on reverse">number: 0</td>
              </tr>
            </tbody>
          </table>
        
        The table implementation is also able to get the sorting criteria given from a
        request. Let's setup such a request:
        
          >>> sorterRequest = TestRequest(form={'table-sortOn': 'table-number-1',
          ...                                   'table-sortOrder':'descending'})
        
        and another time, update and render. As you can see the new table gets sorted
        by the second column and ordered in reverse order:
        
          >>> requestSortedTable = SortingTable(container, sorterRequest)
          >>> requestSortedTable.update()
          >>> print requestSortedTable.render()
          <table>
            <thead>
              <tr>
                <th>Title</th>
                <th class="sorted-on descending">Number</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td>Title: Fourth</td>
                <td class="sorted-on descending">number: 4</td>
              </tr>
              <tr>
                <td>Title: Third</td>
                <td class="sorted-on descending">number: 3</td>
              </tr>
              <tr>
                <td>Title: Second</td>
                <td class="sorted-on descending">number: 2</td>
              </tr>
              <tr>
                <td>Title: First</td>
                <td class="sorted-on descending">number: 1</td>
              </tr>
              <tr>
                <td>Title: Zero</td>
                <td class="sorted-on descending">number: 0</td>
              </tr>
            </tbody>
          </table>
        
        There's a header renderer, which provides a handy link rendering for sorting:
        
          >>> import zope.component
          >>> from z3c.table import interfaces
          >>> from z3c.table.header import SortingColumnHeader
          >>> zope.component.provideAdapter(SortingColumnHeader,
          ...     (None, None, interfaces.ITable, interfaces.IColumn),
          ...     provides=interfaces.IColumnHeader)
        
        Let's see now various sortings:
        
          >>> request = TestRequest()
          >>> sortingTable = SortingTable(container, request)
          >>> sortingTable.update()
          >>> sortingTable.sortOn
          0
          >>> sortingTable.sortOrder
          u'ascending'
          >>> print sortingTable.render()
          <table>
            <thead>
              <tr>
                <th class="sorted-on ascending"><a href="?table-sortOrder=descending&table-sortOn=table-title-0" title="Sort">Title</a></th>
                <th><a href="?table-sortOrder=ascending&table-sortOn=table-number-1" title="Sort">Number</a></th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td class="sorted-on ascending">Title: First</td>
                <td>number: 1</td>
              </tr>
              <tr>
                <td class="sorted-on ascending">Title: Fourth</td>
                <td>number: 4</td>
              </tr>
              <tr>
                <td class="sorted-on ascending">Title: Second</td>
                <td>number: 2</td>
              </tr>
              <tr>
                <td class="sorted-on ascending">Title: Third</td>
                <td>number: 3</td>
              </tr>
              <tr>
                <td class="sorted-on ascending">Title: Zero</td>
                <td>number: 0</td>
              </tr>
            </tbody>
          </table>
        
        Let's see the `number` column:
        
          >>> sortingTable.sortOn = u'table-number-1'
        
          >>> sortingTable.update()
          >>> print sortingTable.render()
          <table>
            <thead>
              <tr>
                <th><a href="?table-sortOrder=ascending&table-sortOn=table-title-0" title="Sort">Title</a></th>
                <th class="sorted-on ascending"><a href="?table-sortOrder=descending&table-sortOn=table-number-1" title="Sort">Number</a></th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td>Title: Zero</td>
                <td class="sorted-on ascending">number: 0</td>
              </tr>
              <tr>
                <td>Title: First</td>
                <td class="sorted-on ascending">number: 1</td>
              </tr>
              <tr>
                <td>Title: Second</td>
                <td class="sorted-on ascending">number: 2</td>
              </tr>
              <tr>
                <td>Title: Third</td>
                <td class="sorted-on ascending">number: 3</td>
              </tr>
              <tr>
                <td>Title: Fourth</td>
                <td class="sorted-on ascending">number: 4</td>
              </tr>
            </tbody>
          </table>
        
        Let's see the `title` column but descending:
        
          >>> sortingTable.sortOn = u'table-title-0'
          >>> sortingTable.sortOrder = 'descending'
        
          >>> sortingTable.update()
          >>> print sortingTable.render()
          <table>
            <thead>
              <tr>
                <th class="sorted-on descending"><a href="?table-sortOrder=ascending&table-sortOn=table-title-0" title="Sort">Title</a></th>
                <th><a href="?table-sortOrder=descending&table-sortOn=table-number-1" title="Sort">Number</a></th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td class="sorted-on descending">Title: Zero</td>
                <td>number: 0</td>
              </tr>
              <tr>
                <td class="sorted-on descending">Title: Third</td>
                <td>number: 3</td>
              </tr>
              <tr>
                <td class="sorted-on descending">Title: Second</td>
                <td>number: 2</td>
              </tr>
              <tr>
                <td class="sorted-on descending">Title: Fourth</td>
                <td>number: 4</td>
              </tr>
              <tr>
                <td class="sorted-on descending">Title: First</td>
                <td>number: 1</td>
              </tr>
            </tbody>
          </table>
        
        
        Batching
        --------
        
        Our table implements batching out of the box. If the amount of
        row items is smaller than the given ``startBatchingAt`` size, the table starts
        to batch at this size. Let's define a new Table.
        
        We need to configure our batch provider for the next step first. See the
        section ``BatchProvider`` below for more infos about batch rendering:
        
          >>> from zope.configuration.xmlconfig import XMLConfig
          >>> import z3c.table
          >>> import zope.component
          >>> XMLConfig('meta.zcml', zope.component)()
          >>> XMLConfig('configure.zcml', z3c.table)()
        
        Now we can create our table:
        
          >>> from zope.publisher.browser import TestRequest
          >>> from z3c.table.testing import Container, Content, SimpleTable
          >>> container = Container()
          >>> root['container-1'] = container
          >>> request = TestRequest()
          >>> batchingTable = SimpleTable(container, request)
          >>> batchingTable.cssClassSortedOn = None
        
        We also need to give the table a location and a name like we normally setup
        in traversing:
        
          >>> batchingTable.__parent__ = container
          >>> batchingTable.__name__ = u'batchingTable.html'
        
        Now setup some items:
        
          >>> container[u'zero'] = Content('Zero', 0)
          >>> container[u'first'] = Content('First', 1)
          >>> container[u'second'] = Content('Second', 2)
          >>> container[u'third'] = Content('Third', 3)
          >>> container[u'fourth'] = Content('Fourth', 4)
          >>> container[u'sixth'] = Content('Sixth', 6)
          >>> container[u'seventh'] = Content('Seventh', 7)
          >>> container[u'eighth'] = Content('Eighth', 8)
          >>> container[u'ninth'] = Content('Ninth', 9)
          >>> container[u'tenth'] = Content('Tenth', 10)
          >>> container[u'eleventh'] = Content('Eleventh', 11)
          >>> container[u'twelfth '] = Content('Twelfth', 12)
          >>> container[u'thirteenth'] = Content('Thirteenth', 13)
          >>> container[u'fourteenth'] = Content('Fourteenth', 14)
          >>> container[u'fifteenth '] = Content('Fifteenth', 15)
          >>> container[u'sixteenth'] = Content('Sixteenth', 16)
          >>> container[u'seventeenth'] = Content('Seventeenth', 17)
          >>> container[u'eighteenth'] = Content('Eighteenth', 18)
          >>> container[u'nineteenth'] = Content('Nineteenth', 19)
          >>> container[u'twentieth'] = Content('Twentieth', 20)
        
        Now let's show the full table without batching:
        
          >>> batchingTable.update()
          >>> print batchingTable.render()
          <table>
            <thead>
              <tr>
                <th>My items</th>
                <th>Number</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td>Eighteenth item</td>
                <td>number: 18</td>
              </tr>
              <tr>
                <td>Eighth item</td>
                <td>number: 8</td>
              </tr>
              <tr>
                <td>Eleventh item</td>
                <td>number: 11</td>
              </tr>
              <tr>
                <td>Fifteenth item</td>
                <td>number: 15</td>
              </tr>
              <tr>
                <td>First item</td>
                <td>number: 1</td>
              </tr>
              <tr>
                <td>Fourteenth item</td>
                <td>number: 14</td>
              </tr>
              <tr>
                <td>Fourth item</td>
                <td>number: 4</td>
              </tr>
              <tr>
                <td>Nineteenth item</td>
                <td>number: 19</td>
              </tr>
              <tr>
                <td>Ninth item</td>
                <td>number: 9</td>
              </tr>
              <tr>
                <td>Second item</td>
                <td>number: 2</td>
              </tr>
              <tr>
                <td>Seventeenth item</td>
                <td>number: 17</td>
              </tr>
              <tr>
                <td>Seventh item</td>
                <td>number: 7</td>
              </tr>
              <tr>
                <td>Sixteenth item</td>
                <td>number: 16</td>
              </tr>
              <tr>
                <td>Sixth item</td>
                <td>number: 6</td>
              </tr>
              <tr>
                <td>Tenth item</td>
                <td>number: 10</td>
              </tr>
              <tr>
                <td>Third item</td>
                <td>number: 3</td>
              </tr>
              <tr>
                <td>Thirteenth item</td>
                <td>number: 13</td>
              </tr>
              <tr>
                <td>Twelfth item</td>
                <td>number: 12</td>
              </tr>
              <tr>
                <td>Twentieth item</td>
                <td>number: 20</td>
              </tr>
              <tr>
                <td>Zero item</td>
                <td>number: 0</td>
              </tr>
            </tbody>
          </table>
        
        As you can see, the table is not ordered and it uses all items. If we like
        to use the batch, we need to set the startBatchingAt size to a lower value than
        it is set by default.
        The default value which a batch is used is set to ``50``:
        
          >>> batchingTable.startBatchingAt
          50
        
        We will set the batch start to ``5`` for now. This means the first 5 items
        do not get used:
        
          >>> batchingTable.startBatchingAt = 5
          >>> batchingTable.startBatchingAt
          5
        
        There is also a ``batchSize`` value which we need to set to ``5``. By default
        the value gets initialized by the ``batchSize`` value:
        
          >>> batchingTable.batchSize
          50
        
          >>> batchingTable.batchSize = 5
          >>> batchingTable.batchSize
          5
        
        Now we can update and render the table again. But you will see that we only get
        a table size of 5 rows, which is correct. But the order doesn't depend on the
        numbers we see in cells:
        
          >>> batchingTable.update()
          >>> print batchingTable.render()
          <table>
            <thead>
              <tr>
                <th>My items</th>
                <th>Number</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td>Eighteenth item</td>
                <td>number: 18</td>
              </tr>
              <tr>
                <td>Eighth item</td>
                <td>number: 8</td>
              </tr>
              <tr>
                <td>Eleventh item</td>
                <td>number: 11</td>
              </tr>
              <tr>
                <td>Fifteenth item</td>
                <td>number: 15</td>
              </tr>
              <tr>
                <td>First item</td>
                <td>number: 1</td>
              </tr>
            </tbody>
          </table>
        
        I think we should order the table by the second column before we show the next
        batch values. We do this by simply set the ``defaultSortOn``:
        
          >>> batchingTable.sortOn = u'table-number-1'
        
        Now we should see a nice ordered and batched table:
        
          >>> batchingTable.update()
          >>> print batchingTable.render()
          <table>
            <thead>
              <tr>
                <th>My items</th>
                <th>Number</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td>Zero item</td>
                <td>number: 0</td>
              </tr>
              <tr>
                <td>First item</td>
                <td>number: 1</td>
              </tr>
              <tr>
                <td>Second item</td>
                <td>number: 2</td>
              </tr>
              <tr>
                <td>Third item</td>
                <td>number: 3</td>
              </tr>
              <tr>
                <td>Fourth item</td>
                <td>number: 4</td>
              </tr>
            </tbody>
          </table>
        
        The batch concept allows us to choose from all batches and render the rows
        for this batched items. We can do this by set any batch as rows. as you can see
        we have ``4`` batched row data available:
        
          >>> len(batchingTable.rows.batches)
          4
        
        We can set such a batch as row values, then this batch data are used for
        rendering. But take care, if we update the table, our rows get overridden
        and reset to the previous values. this means you can set any batch as rows
        data and only render them. This is possible since the update method sorted all
        items and all batch contain ready-to-use data. This concept could be important
        if you need to cache batches etc. :
        
          >>> batchingTable.rows = batchingTable.rows.batches[1]
          >>> print batchingTable.render()
          <table>
            <thead>
              <tr>
                <th>My items</th>
                <th>Number</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td>Sixth item</td>
                <td>number: 6</td>
              </tr>
              <tr>
                <td>Seventh item</td>
                <td>number: 7</td>
              </tr>
              <tr>
                <td>Eighth item</td>
                <td>number: 8</td>
              </tr>
              <tr>
                <td>Ninth item</td>
                <td>number: 9</td>
              </tr>
              <tr>
                <td>Tenth item</td>
                <td>number: 10</td>
              </tr>
            </tbody>
          </table>
        
        And like described above, if you call ``update`` our batch to rows setup get
        reset:
        
          >>> batchingTable.update()
          >>> print batchingTable.render()
          <table>
            <thead>
              <tr>
                <th>My items</th>
                <th>Number</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td>Zero item</td>
                <td>number: 0</td>
              </tr>
              <tr>
                <td>First item</td>
                <td>number: 1</td>
              </tr>
              <tr>
                <td>Second item</td>
                <td>number: 2</td>
              </tr>
              <tr>
                <td>Third item</td>
                <td>number: 3</td>
              </tr>
              <tr>
                <td>Fourth item</td>
                <td>number: 4</td>
              </tr>
            </tbody>
          </table>
        
        This means you can probably update all batches, cache them and use them after.
        But this is not useful for normal usage in a page without an enhanced concept
        which is not a part of this implementation. This also means, there must be
        another way to set the batch index. Yes there is, there are two other ways how
        we can set the batch position. We can set a batch position by setting the
        ``batchStart`` value in our table or we can use a request variable. Let's show
        the first one first:
        
          >>> batchingTable.batchStart = 6
          >>> batchingTable.update()
          >>> print batchingTable.render()
          <table>
            <thead>
              <tr>
                <th>My items</th>
                <th>Number</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td>Seventh item</td>
                <td>number: 7</td>
              </tr>
              <tr>
                <td>Eighth item</td>
                <td>number: 8</td>
              </tr>
              <tr>
                <td>Ninth item</td>
                <td>number: 9</td>
              </tr>
              <tr>
                <td>Tenth item</td>
                <td>number: 10</td>
              </tr>
              <tr>
                <td>Eleventh item</td>
                <td>number: 11</td>
              </tr>
            </tbody>
          </table>
        
        We can also set the batch position by using the batchStart value in a request.
        Note that we need the table ``prefix`` and column ``__name__`` like we use in
        the sorting concept:
        
          >>> batchingRequest = TestRequest(form={'table-batchStart': '11',
          ...                                     'table-batchSize': '5',
          ...                                     'table-sortOn': 'table-number-1'})
          >>> requestBatchingTable = SimpleTable(container, batchingRequest)
          >>> requestBatchingTable.cssClassSortedOn = None
          
        We also need to give the table a location and a name like we normally set up
        in traversing:
        
          >>> requestBatchingTable.__parent__ = container
          >>> requestBatchingTable.__name__ = u'requestBatchingTable.html'
        
        Note: our table needs to start batching at smaller amount of items than we
        have by default otherwise we don't get a batch:
        
          >>> requestBatchingTable.startBatchingAt = 5
          >>> requestBatchingTable.update()
          >>> print requestBatchingTable.render()
          <table>
            <thead>
              <tr>
                <th>My items</th>
                <th>Number</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td>Twelfth item</td>
                <td>number: 12</td>
              </tr>
              <tr>
                <td>Thirteenth item</td>
                <td>number: 13</td>
              </tr>
              <tr>
                <td>Fourteenth item</td>
                <td>number: 14</td>
              </tr>
              <tr>
                <td>Fifteenth item</td>
                <td>number: 15</td>
              </tr>
              <tr>
                <td>Sixteenth item</td>
                <td>number: 16</td>
              </tr>
            </tbody>
          </table>
        
        
        BatchProvider
        -------------
        
        The batch provider allows us to render the batch HTML independently of our
        table. This means by default the batch gets not rendered in the render method.
        You can change this in your custom table implementation and return the batch
        and the table in the render method.
        
        As we can see, our table rows provides IBatch if it comes to batching:
        
          >>> from z3c.batching.interfaces import IBatch
          >>> IBatch.providedBy(requestBatchingTable.rows)
          True
        
        Let's check some batch variables before we render our test. This let us compare
        the rendered result. For more information about batching see the README.txt in
        z3c.batching:
        
          >>> requestBatchingTable.rows.start
          11
        
          >>> requestBatchingTable.rows.index
          2
        
          >>> requestBatchingTable.rows.batches
          <z3c.batching.batch.Batches object at ...>
        
          >>> len(requestBatchingTable.rows.batches)
          4
        
        We use our previous batching table and render the batch with the built-in
        ``renderBatch`` method:
        
          >>> requestBatchingTable.update()
          >>> print requestBatchingTable.renderBatch()
          <a href="...html?table-batchSize=5&table-batchStart=0&..." class="first">1</a>
          <a href="...html?table-batchSize=5&table-batchStart=5&...">2</a>
          <a href="...html?table-batchSize=5&table-batchStart=11&..." class="current">3</a>
          <a href="...html?table-batchSize=5&table-batchStart=15&..." class="last">4</a>
        
        Now let's add more items so that we can test the skipped links in large
        batches:
        
          >>> for i in range(1000):
          ...     idx = i+20
          ...     container[str(idx)] = Content(str(idx), idx)
        
        Now let's test the batching table again with the new amount of items and
        the same ``startBatchingAt`` of 5 but starting the batch at item ``100``
        and sorted on the second numbered column:
        
          >>> batchingRequest = TestRequest(form={'table-batchStart': '100',
          ...                                     'table-batchSize': '5',
          ...                                     'table-sortOn': 'table-number-1'})
          >>> requestBatchingTable = SimpleTable(container, batchingRequest)
          >>> requestBatchingTable.startBatchingAt = 5
          >>> requestBatchingTable.cssClassSortedOn = None
        
        We also need to give the table a location and a name like we normally setup
        in traversing:
        
          >>> requestBatchingTable.__parent__ = container
          >>> requestBatchingTable.__name__ = u'requestBatchingTable.html'
        
          >>> requestBatchingTable.update()
          >>> print requestBatchingTable.render()
          <table>
            <thead>
              <tr>
                <th>My items</th>
                <th>Number</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td>100 item</td>
                <td>number: 100</td>
              </tr>
              <tr>
                <td>101 item</td>
                <td>number: 101</td>
              </tr>
              <tr>
                <td>102 item</td>
                <td>number: 102</td>
              </tr>
              <tr>
                <td>103 item</td>
                <td>number: 103</td>
              </tr>
              <tr>
                <td>104 item</td>
                <td>number: 104</td>
              </tr>
            </tbody>
          </table>
        
        And test the batch. Note the three dots between the links are rendered by the
        batch provider and are not a part of the doctest:
        
          >>> print requestBatchingTable.renderBatch()
          <a href="...html?table-batchSize=5&table-batchStart=0&table-sortOn=table-number-1" class="first">1</a>
          ...
          <a href="...html?table-batchSize=5&table-batchStart=85&table-sortOn=table-number-1">18</a>
          <a href="...html?table-batchSize=5&table-batchStart=90&table-sortOn=table-number-1">19</a>
          <a href="...html?table-batchSize=5&table-batchStart=95&table-sortOn=table-number-1">20</a>
          <a href="...html?table-batchSize=5&table-batchStart=100&table-sortOn=table-number-1" class="current">21</a>
          <a href="...html?table-batchSize=5&table-batchStart=105&table-sortOn=table-number-1">22</a>
          <a href="...html?table-batchSize=5&table-batchStart=110&table-sortOn=table-number-1">23</a>
          <a href="...html?table-batchSize=5&table-batchStart=115&table-sortOn=table-number-1">24</a>
          ...
          <a href="...html?table-batchSize=5&table-batchStart=1015&table-sortOn=table-number-1" class="last">204</a>
        
        You can change the spacer in the batch provider if you set the ``batchSpacer``
        value:
        
          >>> from z3c.table.batch import BatchProvider
          >>> from z3c.table.interfaces import IBatchProvider
          >>> from zope.interface import implements
          >>> class XBatchProvider(BatchProvider):
          ...     """Just another batch provider."""
          ...     implements(IBatchProvider)
          ...     batchSpacer = u'xxx'
        
        Now register the new batch provider for our batching table:
        
          >>> import zope.publisher.interfaces.browser
          >>> from zope.component import getSiteManager
          >>> sm = getSiteManager(container)
          >>> sm.registerAdapter(XBatchProvider,
          ...     (zope.interface.Interface,
          ...      zope.publisher.interfaces.browser.IBrowserRequest,
          ...      SimpleTable), name='batch')
        
        If we update and render our table, the new batch provider should get used.
        As you can see the spacer get changed now:
        
          >>> requestBatchingTable.update()
          >>> requestBatchingTable.batchProvider
          <XBatchProvider object at ...>
          >>> print requestBatchingTable.renderBatch()
          <a href="...html?table-batchSize=5&table-batchStart=0&table-sortOn=table-number-1" class="first">1</a>
          xxx
          <a href="...html?table-batchSize=5&table-batchStart=85&table-sortOn=table-number-1">18</a>
          <a href="...html?table-batchSize=5&table-batchStart=90&table-sortOn=table-number-1">19</a>
          <a href="...html?table-batchSize=5&table-batchStart=95&table-sortOn=table-number-1">20</a>
          <a href="...html?table-batchSize=5&table-batchStart=100&table-sortOn=table-number-1" class="current">21</a>
          <a href="...html?table-batchSize=5&table-batchStart=105&table-sortOn=table-number-1">22</a>
          <a href="...html?table-batchSize=5&table-batchStart=110&table-sortOn=table-number-1">23</a>
          <a href="...html?table-batchSize=5&table-batchStart=115&table-sortOn=table-number-1">24</a>
          xxx
          <a href="...html?table-batchSize=5&table-batchStart=1015&table-sortOn=table-number-1" class="last">204</a>
        
        
        Now test the extremities, need to define a new batchingRequest:
        Beginning by the left end point:
        
          >>> leftBatchingRequest = TestRequest(form={'table-batchStart': '10',
          ...                                        'table-batchSize': '5',
          ...                                       'table-sortOn': 'table-number-1'})
          >>> leftRequestBatchingTable = SimpleTable(container, leftBatchingRequest)
          >>> leftRequestBatchingTable.__parent__ = container
          >>> leftRequestBatchingTable.__name__ = u'leftRequestBatchingTable.html'
          >>> leftRequestBatchingTable.update()
          >>> print leftRequestBatchingTable.renderBatch()
          <a href="http://...html?table-batchSize=5&table-batchStart=0&table-sortOn=table-number-1" class="first">1</a>
          <a href="http://...html?table-batchSize=5&table-batchStart=5&table-sortOn=table-number-1">2</a>
          <a href="http://...html?table-batchSize=5&table-batchStart=10&table-sortOn=table-number-1" class="current">3</a>
          <a href="http://...html?table-batchSize=5&table-batchStart=15&table-sortOn=table-number-1">4</a>
          <a href="http://...html?table-batchSize=5&table-batchStart=20&table-sortOn=table-number-1">5</a>
          <a href="http://...html?table-batchSize=5&table-batchStart=25&table-sortOn=table-number-1">6</a>
          xxx
          <a href="http://...html?table-batchSize=5&table-batchStart=1015&table-sortOn=table-number-1" class="last">204</a>
        
        Go on with the right extremity:
        
          >>> rightBatchingRequest = TestRequest(form={'table-batchStart': '1005',
          ...                                     'table-batchSize': '5',
          ...                                     'table-sortOn': 'table-number-1'})
          >>> rightRequestBatchingTable = SimpleTable(container, rightBatchingRequest)
          >>> rightRequestBatchingTable.__parent__ = container
          >>> rightRequestBatchingTable.__name__ = u'rightRequestBatchingTable.html'
          >>> rightRequestBatchingTable.update()
          >>> print rightRequestBatchingTable.renderBatch()
          <a href="http://...html?table-batchSize=5&table-batchStart=0&table-sortOn=table-number-1" class="first">1</a>
          xxx
          <a href="http://...html?table-batchSize=5&table-batchStart=990&table-sortOn=table-number-1">199</a>
          <a href="http://...html?table-batchSize=5&table-batchStart=995&table-sortOn=table-number-1">200</a>
          <a href="http://...html?table-batchSize=5&table-batchStart=1000&table-sortOn=table-number-1">201</a>
          <a href="http://...html?table-batchSize=5&table-batchStart=1005&table-sortOn=table-number-1" class="current">202</a>
          <a href="http://...html?table-batchSize=5&table-batchStart=1010&table-sortOn=table-number-1">203</a>
          <a href="http://...html?table-batchSize=5&table-batchStart=1015&table-sortOn=table-number-1" class="last">204</a>
        
        
        None previous and next batch size. Probably it doesn't make sense but let's
        show what happens if we set the previous and next batch size to 0 (zero):
        
          >>> from z3c.table.batch import BatchProvider
          >>> class ZeroBatchProvider(BatchProvider):
          ...     """Just another batch provider."""
          ...     batchSpacer = u'xxx'
          ...     previousBatchSize = 0
          ...     nextBatchSize = 0
        
        Now register the new batch provider for our batching table:
        
          >>> import zope.publisher.interfaces.browser
          >>> sm.registerAdapter(ZeroBatchProvider,
          ...     (zope.interface.Interface,
          ...      zope.publisher.interfaces.browser.IBrowserRequest,
          ...      SimpleTable), name='batch')
        
        Update the table and render the batch:
        
          >>> requestBatchingTable.update()
          >>> print requestBatchingTable.renderBatch()
          <a href="...html?table-batchSize=5&table-batchStart=0&table-sortOn=table-number-1" class="first">1</a>
          xxx
          <a href="...html?table-batchSize=5&table-batchStart=100&table-sortOn=table-number-1" class="current">21</a>
          xxx
          <a href="...html?table-batchSize=5&table-batchStart=1015&table-sortOn=table-number-1" class="last">204</a>
        
        
        SequenceTable
        -------------
        
        A sequence table can be used if we need to provide a table for a sequence
        of items instead of a mapping. Define the same sequence of items we used before
        we added the other 1000 items:
        
          >>> from z3c.table.testing import Content
          >>> dataSequence = []
          >>> dataSequence.append(Content('Zero', 0))
          >>> dataSequence.append(Content('First', 1))
          >>> dataSequence.append(Content('Second', 2))
          >>> dataSequence.append(Content('Third', 3))
          >>> dataSequence.append(Content('Fourth', 4))
          >>> dataSequence.append(Content('Fifth', 5))
          >>> dataSequence.append(Content('Sixth', 6))
          >>> dataSequence.append(Content('Seventh', 7))
          >>> dataSequence.append(Content('Eighth', 8))
          >>> dataSequence.append(Content('Ninth', 9))
          >>> dataSequence.append(Content('Tenth', 10))
          >>> dataSequence.append(Content('Eleventh', 11))
          >>> dataSequence.append(Content('Twelfth', 12))
          >>> dataSequence.append(Content('Thirteenth', 13))
          >>> dataSequence.append(Content('Fourteenth', 14))
          >>> dataSequence.append(Content('Fifteenth', 15))
          >>> dataSequence.append(Content('Sixteenth', 16))
          >>> dataSequence.append(Content('Seventeenth', 17))
          >>> dataSequence.append(Content('Eighteenth', 18))
          >>> dataSequence.append(Content('Nineteenth', 19))
          >>> dataSequence.append(Content('Twentieth', 20))
        
        Now let's define a new SequenceTable:
        
          >>> from z3c.table import table, column
          >>> from z3c.table.testing import (TitleColumn, NumberColumn, cellRenderer,
          ...                                headCellRenderer)
          >>> class SequenceTable(table.SequenceTable):
          ...
          ...     def setUpColumns(self):
          ...         return [
          ...             column.addColumn(self, TitleColumn, u'title',
          ...                              cellRenderer=cellRenderer,
          ...                              headCellRenderer=headCellRenderer,
          ...                              weight=1),
          ...             column.addColumn(self, NumberColumn, name=u'number',
          ...                              weight=2, header=u'Number')
          ...             ]
        
        Now we can create our table adapting our sequence:
        
          >>> from zope.publisher.browser import TestRequest
          >>> sequenceRequest = TestRequest(form={'table-batchStart': '0',
          ...                                     'table-sortOn': 'table-number-1'})
          >>> sequenceTable = SequenceTable(dataSequence, sequenceRequest)
          >>> sequenceTable.cssClassSortedOn = None
        
        We also need to give the table a location and a name like we normally setup
        in traversing:
        
          >>> from z3c.table.testing import Container
          >>> container = Container()
          >>> root['container-1'] = container
          >>> sequenceTable.__parent__ = container
          >>> sequenceTable.__name__ = u'sequenceTable.html'
        
        We need to configure our batch provider for the next step first. See the
        section ``BatchProvider`` below for more infos about batch rendering:
        
          >>> from zope.configuration.xmlconfig import XMLConfig
          >>> import z3c.table
          >>> import zope.component
          >>> XMLConfig('meta.zcml', zope.component)()
          >>> XMLConfig('configure.zcml', z3c.table)()
        
        And update and render the sequence table:
        
          >>> sequenceTable.update()
          >>> print sequenceTable.render()
          <table>
            <thead>
              <tr>
                <th>My items</th>
                <th>Number</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td>Zero item</td>
                <td>number: 0</td>
              </tr>
              <tr>
                <td>First item</td>
                <td>number: 1</td>
              </tr>
              <tr>
                <td>Second item</td>
                <td>number: 2</td>
              </tr>
              <tr>
                <td>Third item</td>
                <td>number: 3</td>
              </tr>
              <tr>
                <td>Fourth item</td>
                <td>number: 4</td>
              </tr>
              <tr>
                <td>Fifth item</td>
                <td>number: 5</td>
              </tr>
              <tr>
                <td>Sixth item</td>
                <td>number: 6</td>
              </tr>
              <tr>
                <td>Seventh item</td>
                <td>number: 7</td>
              </tr>
              <tr>
                <td>Eighth item</td>
                <td>number: 8</td>
              </tr>
              <tr>
                <td>Ninth item</td>
                <td>number: 9</td>
              </tr>
              <tr>
                <td>Tenth item</td>
                <td>number: 10</td>
              </tr>
              <tr>
                <td>Eleventh item</td>
                <td>number: 11</td>
              </tr>
              <tr>
                <td>Twelfth item</td>
                <td>number: 12</td>
              </tr>
              <tr>
                <td>Thirteenth item</td>
                <td>number: 13</td>
              </tr>
              <tr>
                <td>Fourteenth item</td>
                <td>number: 14</td>
              </tr>
              <tr>
                <td>Fifteenth item</td>
                <td>number: 15</td>
              </tr>
              <tr>
                <td>Sixteenth item</td>
                <td>number: 16</td>
              </tr>
              <tr>
                <td>Seventeenth item</td>
                <td>number: 17</td>
              </tr>
              <tr>
                <td>Eighteenth item</td>
                <td>number: 18</td>
              </tr>
              <tr>
                <td>Nineteenth item</td>
                <td>number: 19</td>
              </tr>
              <tr>
                <td>Twentieth item</td>
                <td>number: 20</td>
              </tr>
            </tbody>
          </table>
        
        As you can see, the items get rendered based on a data sequence. Now we set
        the ``start batch at`` size to ``5``:
        
          >>> sequenceTable.startBatchingAt = 5
        
        And the ``batchSize`` to ``5``:
        
          >>> sequenceTable.batchSize = 5
        
        Now we can update and render the table again. But you will see that we only get
        a table size of 5 rows:
        
          >>> sequenceTable.update()
          >>> print sequenceTable.render()
          <table>
            <thead>
              <tr>
                <th>My items</th>
                <th>Number</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td>Zero item</td>
                <td>number: 0</td>
              </tr>
              <tr>
                <td>First item</td>
                <td>number: 1</td>
              </tr>
              <tr>
                <td>Second item</td>
                <td>number: 2</td>
              </tr>
              <tr>
                <td>Third item</td>
                <td>number: 3</td>
              </tr>
              <tr>
                <td>Fourth item</td>
                <td>number: 4</td>
              </tr>
            </tbody>
          </table>
        
        And we set the sort order to ``reverse`` even if we use batching:
        
          >>> sequenceTable.sortOrder = u'reverse'
          >>> sequenceTable.update()
          >>> print sequenceTable.render()
          <table>
            <thead>
              <tr>
                <th>My items</th>
                <th>Number</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td>Twentieth item</td>
                <td>number: 20</td>
              </tr>
              <tr>
                <td>Nineteenth item</td>
                <td>number: 19</td>
              </tr>
              <tr>
                <td>Eighteenth item</td>
                <td>number: 18</td>
              </tr>
              <tr>
                <td>Seventeenth item</td>
                <td>number: 17</td>
              </tr>
              <tr>
                <td>Sixteenth item</td>
                <td>number: 16</td>
              </tr>
            </tbody>
          </table>
        
        
        =============
        Table Columns
        =============
        
        Let's show the different columns we offer by default. But first take a look at
        the README.txt which explains the Table and Column concepts.
        
        
        Sample data setup
        -----------------
        
        Let's create a sample container that we can use as our iterable context:
        
          >>> from zope.container import btree
          >>> class Container(btree.BTreeContainer):
          ...     """Sample container."""
          >>> container = Container()
          >>> root['container'] = container
        
        and create a sample content object that we use as container item:
        
          >>> class Content(object):
          ...     """Sample content."""
          ...     def __init__(self, title, number, email):
          ...         self.title = title
          ...         self.number = number
          ...         self.email = email
        
        Now setup some items:
        
          >>> container[u'zero'] = Content('Zero', 0, 'zero@example.com')
          >>> container[u'first'] = Content('First', 1, 'first@example.com')
          >>> container[u'second'] = Content('Second', 2, 'second@example.com')
          >>> container[u'third'] = Content('Third', 3, 'third@example.com')
          >>> container[u'fourth'] = Content('Fourth', 4, None)
        
        Let's also create a simple number sortable column:
        
          >>> from z3c.table import column
          >>> class NumberColumn(column.Column):
          ...
          ...     header = u'Number'
          ...     weight = 20
          ...
          ...     def getSortKey(self, item):
          ...         return item.number
          ...
          ...     def renderCell(self, item):
          ...         return 'number: %s' % item.number
        
        
        NameColumn
        ----------
        
        Let's define a table using the NameColumn:
        
          >>> from z3c.table import table
          >>> class NameTable(table.Table):
          ...     cssClassSortedOn = None
          ...
          ...     def setUpColumns(self):
          ...         return [
          ...             column.addColumn(self, column.NameColumn, u'name',
          ...                              weight=1),
          ...             column.addColumn(self, NumberColumn, name=u'number',
          ...                              weight=2, header=u'Number')
          ...             ]
        
        Now create, update and render our table and you can see that the NameColumn
        renders the name of the item using the zope.traversing.api.getName() concept:
        
          >>> from zope.publisher.browser import TestRequest
          >>> request = TestRequest()
          >>> nameTable = NameTable(container, request)
          >>> nameTable.update()
          >>> print nameTable.render()
          <table>
            <thead>
              <tr>
                <th>Name</th>
                <th>Number</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td>first</td>
                <td>number: 1</td>
              </tr>
              <tr>
                <td>fourth</td>
                <td>number: 4</td>
              </tr>
              <tr>
                <td>second</td>
                <td>number: 2</td>
              </tr>
              <tr>
                <td>third</td>
                <td>number: 3</td>
              </tr>
              <tr>
                <td>zero</td>
                <td>number: 0</td>
              </tr>
            </tbody>
          </table>
        
        
        RadioColumn
        -----------
        
        Let's define a table using the RadioColumn:
        
          >>> class RadioTable(table.Table):
          ...     cssClassSortedOn = None
          ...
          ...     def setUpColumns(self):
          ...         return [
          ...             column.addColumn(self, column.RadioColumn, u'radioColumn',
          ...                              weight=1),
          ...             column.addColumn(self, NumberColumn, name=u'number',
          ...                              weight=2, header=u'Number')
          ...             ]
        
        Now create, update and render our table:
        
          >>> request = TestRequest()
          >>> radioTable = RadioTable(container, request)
          >>> radioTable.update()
          >>> print radioTable.render()
          <table>
            <thead>
              <tr>
                <th>X</th>
                <th>Number</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td><input type="radio" class="radio-widget" name="table-radioColumn-0-selectedItem" value="first"  /></td>
                <td>number: 1</td>
              </tr>
              <tr>
                <td><input type="radio" class="radio-widget" name="table-radioColumn-0-selectedItem" value="fourth"  /></td>
                <td>number: 4</td>
              </tr>
              <tr>
                <td><input type="radio" class="radio-widget" name="table-radioColumn-0-selectedItem" value="second"  /></td>
                <td>number: 2</td>
              </tr>
              <tr>
                <td><input type="radio" class="radio-widget" name="table-radioColumn-0-selectedItem" value="third"  /></td>
                <td>number: 3</td>
              </tr>
              <tr>
                <td><input type="radio" class="radio-widget" name="table-radioColumn-0-selectedItem" value="zero"  /></td>
                <td>number: 0</td>
              </tr>
            </tbody>
          </table>
        
        As you can see, we can force to render the radio input field as selected with a
        given request value:
        
          >>> radioRequest = TestRequest(form={'table-radioColumn-0-selectedItem': 'third'})
          >>> radioTable = RadioTable(container, radioRequest)
          >>> radioTable.update()
          >>> print radioTable.render()
          <table>
            <thead>
              <tr>
                <th>X</th>
                <th>Number</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td><input type="radio" class="radio-widget" name="table-radioColumn-0-selectedItem" value="first"  /></td>
                <td>number: 1</td>
              </tr>
              <tr>
                <td><input type="radio" class="radio-widget" name="table-radioColumn-0-selectedItem" value="fourth"  /></td>
                <td>number: 4</td>
              </tr>
              <tr>
                <td><input type="radio" class="radio-widget" name="table-radioColumn-0-selectedItem" value="second"  /></td>
                <td>number: 2</td>
              </tr>
              <tr>
                <td><input type="radio" class="radio-widget" name="table-radioColumn-0-selectedItem" value="third" checked="checked" /></td>
                <td>number: 3</td>
              </tr>
              <tr>
                <td><input type="radio" class="radio-widget" name="table-radioColumn-0-selectedItem" value="zero"  /></td>
                <td>number: 0</td>
              </tr>
            </tbody>
          </table>
        
        
        CheckBoxColumn
        --------------
        
        Let's define a table using the RadioColumn:
        
          >>> class CheckBoxTable(table.Table):
          ...     cssClassSortedOn = None
          ...
          ...     def setUpColumns(self):
          ...         return [
          ...             column.addColumn(self, column.CheckBoxColumn, u'checkBoxColumn',
          ...                              weight=1),
          ...             column.addColumn(self, NumberColumn, name=u'number',
          ...                              weight=2, header=u'Number')
          ...             ]
        
        Now create, update and render our table:
        
        
          >>> request = TestRequest()
          >>> checkBoxTable = CheckBoxTable(container, request)
          >>> checkBoxTable.update()
          >>> print checkBoxTable.render()
          <table>
            <thead>
              <tr>
                <th>X</th>
                <th>Number</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td><input type="checkbox" class="checkbox-widget" name="table-checkBoxColumn-0-selectedItems" value="first"  /></td>
                <td>number: 1</td>
              </tr>
              <tr>
                <td><input type="checkbox" class="checkbox-widget" name="table-checkBoxColumn-0-selectedItems" value="fourth"  /></td>
                <td>number: 4</td>
              </tr>
              <tr>
                <td><input type="checkbox" class="checkbox-widget" name="table-checkBoxColumn-0-selectedItems" value="second"  /></td>
                <td>number: 2</td>
              </tr>
              <tr>
                <td><input type="checkbox" class="checkbox-widget" name="table-checkBoxColumn-0-selectedItems" value="third"  /></td>
                <td>number: 3</td>
              </tr>
              <tr>
                <td><input type="checkbox" class="checkbox-widget" name="table-checkBoxColumn-0-selectedItems" value="zero"  /></td>
                <td>number: 0</td>
              </tr>
            </tbody>
          </table>
        
        And again you can set force to render the checkbox input field as selected with
        a given request value:
        
          >>> checkBoxRequest = TestRequest(form={'table-checkBoxColumn-0-selectedItems':
          ...                                     ['first', 'third']})
          >>> checkBoxTable = CheckBoxTable(container, checkBoxRequest)
          >>> checkBoxTable.update()
          >>> print checkBoxTable.render()
          <table>
            <thead>
              <tr>
                <th>X</th>
                <th>Number</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td><input type="checkbox" class="checkbox-widget" name="table-checkBoxColumn-0-selectedItems" value="first" checked="checked" /></td>
                <td>number: 1</td>
              </tr>
              <tr>
                <td><input type="checkbox" class="checkbox-widget" name="table-checkBoxColumn-0-selectedItems" value="fourth"  /></td>
                <td>number: 4</td>
              </tr>
              <tr>
                <td><input type="checkbox" class="checkbox-widget" name="table-checkBoxColumn-0-selectedItems" value="second"  /></td>
                <td>number: 2</td>
              </tr>
              <tr>
                <td><input type="checkbox" class="checkbox-widget" name="table-checkBoxColumn-0-selectedItems" value="third" checked="checked" /></td>
                <td>number: 3</td>
              </tr>
              <tr>
                <td><input type="checkbox" class="checkbox-widget" name="table-checkBoxColumn-0-selectedItems" value="zero"  /></td>
                <td>number: 0</td>
              </tr>
            </tbody>
          </table>
        
        If you select a row, you can also give them an additional CSS style. This could
        be used in combination with alternating ``even`` and ``odd`` styles:
        
          >>> checkBoxRequest = TestRequest(form={'table-checkBoxColumn-0-selectedItems':
          ...                                     ['first', 'third']})
          >>> checkBoxTable = CheckBoxTable(container, checkBoxRequest)
          >>> checkBoxTable.cssClasses = {'tr': 'tr'}
          >>> checkBoxTable.cssClassSelected = u'selected'
          >>> checkBoxTable.cssClassEven = u'even'
          >>> checkBoxTable.cssClassOdd = u'odd'
          >>> checkBoxTable.update()
          >>> print checkBoxTable.render()
          <table>
            <thead>
              <tr class="tr">
                <th>X</th>
                <th>Number</th>
              </tr>
            </thead>
            <tbody>
              <tr class="selected even tr">
                <td><input type="checkbox" class="checkbox-widget" name="table-checkBoxColumn-0-selectedItems" value="first" checked="checked" /></td>
                <td>number: 1</td>
              </tr>
              <tr class="odd tr">
                <td><input type="checkbox" class="checkbox-widget" name="table-checkBoxColumn-0-selectedItems" value="fourth"  /></td>
                <td>number: 4</td>
              </tr>
              <tr class="even tr">
                <td><input type="checkbox" class="checkbox-widget" name="table-checkBoxColumn-0-selectedItems" value="second"  /></td>
                <td>number: 2</td>
              </tr>
              <tr class="selected odd tr">
                <td><input type="checkbox" class="checkbox-widget" name="table-checkBoxColumn-0-selectedItems" value="third" checked="checked" /></td>
                <td>number: 3</td>
              </tr>
              <tr class="even tr">
                <td><input type="checkbox" class="checkbox-widget" name="table-checkBoxColumn-0-selectedItems" value="zero"  /></td>
                <td>number: 0</td>
              </tr>
            </tbody>
          </table>
        
        Let's test the ``cssClassSelected`` without any other css class:
        
          >>> checkBoxRequest = TestRequest(form={'table-checkBoxColumn-0-selectedItems':
          ...                                     ['first', 'third']})
          >>> checkBoxTable = CheckBoxTable(container, checkBoxRequest)
          >>> checkBoxTable.cssClassSelected = u'selected'
          >>> checkBoxTable.update()
          >>> print checkBoxTable.render()
          <table>
            <thead>
              <tr>
                <th>X</th>
                <th>Number</th>
              </tr>
            </thead>
            <tbody>
              <tr class="selected">
                <td><input type="checkbox" class="checkbox-widget" name="table-checkBoxColumn-0-selectedItems" value="first" checked="checked" /></td>
                <td>number: 1</td>
              </tr>
              <tr>
                <td><input type="checkbox" class="checkbox-widget" name="table-checkBoxColumn-0-selectedItems" value="fourth"  /></td>
                <td>number: 4</td>
              </tr>
              <tr>
                <td><input type="checkbox" class="checkbox-widget" name="table-checkBoxColumn-0-selectedItems" value="second"  /></td>
                <td>number: 2</td>
              </tr>
              <tr class="selected">
                <td><input type="checkbox" class="checkbox-widget" name="table-checkBoxColumn-0-selectedItems" value="third" checked="checked" /></td>
                <td>number: 3</td>
              </tr>
              <tr>
                <td><input type="checkbox" class="checkbox-widget" name="table-checkBoxColumn-0-selectedItems" value="zero"  /></td>
                <td>number: 0</td>
              </tr>
            </tbody>
          </table>
        
        
        CreatedColumn
        -------------
        
        Let's define a table using the CreatedColumn:
        
          >>> class CreatedColumnTable(table.Table):
          ...     cssClassSortedOn = None
          ...
          ...     def setUpColumns(self):
          ...         return [
          ...             column.addColumn(self, column.CreatedColumn, u'createdColumn',
          ...                              weight=1),
          ...             ]
        
        Now create, update and render our table. Note, we use a Dublin Core stub
        adapter which only returns ``01/01/01 01:01`` as created date:
        
          >>> request = TestRequest()
          >>> createdColumnTable = CreatedColumnTable(container, request)
          >>> createdColumnTable.update()
          >>> print createdColumnTable.render()
          <table>
            <thead>
              <tr>
                <th>Created</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td>01/01/01 01:01</td>
              </tr>
              <tr>
                <td>01/01/01 01:01</td>
              </tr>
              <tr>
                <td>01/01/01 01:01</td>
              </tr>
              <tr>
                <td>01/01/01 01:01</td>
              </tr>
              <tr>
                <td>01/01/01 01:01</td>
              </tr>
            </tbody>
          </table>
        
        
        ModifiedColumn
        --------------
        
        Let's define a table using the CreatedColumn:
        
          >>> class ModifiedColumnTable(table.Table):
          ...     cssClassSortedOn = None
          ...
          ...     def setUpColumns(self):
          ...         return [
          ...             column.addColumn(self, column.ModifiedColumn,
          ...                              u'modifiedColumn', weight=1),
          ...             ]
        
        Now create, update and render our table. Note, we use a Dublin Core stub
        adapter which only returns ``02/02/02 02:02`` as modified date:
        
          >>> request = TestRequest()
          >>> modifiedColumnTable = ModifiedColumnTable(container, request)
          >>> modifiedColumnTable.update()
          >>> print modifiedColumnTable.render()
          <table>
            <thead>
              <tr>
                <th>Modified</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td>02/02/02 02:02</td>
              </tr>
              <tr>
                <td>02/02/02 02:02</td>
              </tr>
              <tr>
                <td>02/02/02 02:02</td>
              </tr>
              <tr>
                <td>02/02/02 02:02</td>
              </tr>
              <tr>
                <td>02/02/02 02:02</td>
              </tr>
            </tbody>
          </table>
        
        
        GetAttrColumn
        -------------
        
        The ``GetAttrColumn`` column is a handy column that retrieves the value from
        the item by attribute access.
        It also provides a ``defaultValue`` in case an exception happens.
        
          >>> class GetTitleColumn(column.GetAttrColumn):
          ...
          ...     attrName = 'title'
          ...     defaultValue = u'missing'
        
          >>> class GetAttrColumnTable(table.Table):
          ...     cssClassSortedOn = None
          ...
          ...     def setUpColumns(self):
          ...         return [
          ...             column.addColumn(self, GetTitleColumn, u'title'),
          ...             ]
        
        Render and update the table:
        
          >>> request = TestRequest()
          >>> getAttrColumnTable = GetAttrColumnTable(container, request)
          >>> getAttrColumnTable.update()
          >>> print getAttrColumnTable.render()
          <table>
            <thead>
              <tr>
                <th></th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td>First</td>
              </tr>
              <tr>
                <td>Fourth</td>
              </tr>
              <tr>
                <td>Second</td>
              </tr>
              <tr>
                <td>Third</td>
              </tr>
              <tr>
                <td>Zero</td>
              </tr>
            </tbody>
          </table>
        
        If we use a non-existing Attribute, we do not raise an AttributeError, we will
        get the default value:
        
          >>> class UndefinedAttributeColumn(column.GetAttrColumn):
          ...
          ...     attrName = 'undefined'
          ...     defaultValue = u'missing'
        
          >>> class GetAttrColumnTable(table.Table):
          ...     cssClassSortedOn = None
          ...
          ...     def setUpColumns(self):
          ...         return [
          ...             column.addColumn(self, UndefinedAttributeColumn, u'missing'),
          ...             ]
        
        Render and update the table:
        
          >>> request = TestRequest()
          >>> getAttrColumnTable = GetAttrColumnTable(container, request)
          >>> getAttrColumnTable.update()
          >>> print getAttrColumnTable.render()
          <table>
            <thead>
              <tr>
                <th></th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td>missing</td>
              </tr>
              <tr>
                <td>missing</td>
              </tr>
              <tr>
                <td>missing</td>
              </tr>
              <tr>
                <td>missing</td>
              </tr>
              <tr>
                <td>missing</td>
              </tr>
            </tbody>
          </table>
        
        A missing ``attrName`` in ``GetAttrColumn`` would also end in return the
        ``defaultValue``:
        
          >>> class BadAttributeColumn(column.GetAttrColumn):
          ...
          ...     defaultValue = u'missing'
        
          >>> firstItem = container[u'first']
          >>> simpleTable = table.Table(container, request)
          >>> badColumn = column.addColumn(simpleTable, BadAttributeColumn, u'bad')
          >>> badColumn.renderCell(firstItem)
          u'missing'
        
        If we try to access a protected attribute the object raises an ``Unauthorized``.
        In this case we also return the defaultValue. Let's setup an object which
        raises such an error if we access the title:
        
          >>> from zope.security.interfaces import Unauthorized
          >>> class ProtectedItem(object):
          ...
          ...     @property
          ...     def forbidden(self):
          ...         raise Unauthorized, 'forbidden'
        
        Setup and test the item:
        
          >>> protectedItem = ProtectedItem()
          >>> protectedItem.forbidden
          Traceback (most recent call last):
          ...
          Unauthorized: forbidden
        
        Now define a column:
        
          >>> class ForbiddenAttributeColumn(column.GetAttrColumn):
          ...
          ...     attrName = 'forbidden'
          ...     defaultValue = u'missing'
        
        And test the attribute access:
        
          >>> simpleTable = table.Table(container, request)
          >>> badColumn = column.addColumn(simpleTable, ForbiddenAttributeColumn, u'x')
          >>> badColumn.renderCell(protectedItem)
          u'missing'
        
        
        GetItemColumn
        -------------
        
        The ``GetItemColumn`` column is a handy column that retrieves the value from
        the item by index or key access. That means the item can be a tuple, list, dict
        or anything that implements that.
        It also provides a ``defaultValue`` in case an exception happens.
        
        Dict-ish
        .........
        
          >>> sampleDictData = [
          ...     dict(name='foo', value=1),
          ...     dict(name='bar', value=7),
          ...     dict(name='moo', value=42),]
        
          >>> class GetDictColumnTable(table.Table):
          ...     cssClassSortedOn = None
          ...
          ...     def setUpColumns(self):
          ...         return [
          ...             column.addColumn(self, column.GetItemColumn, u'name',
          ...                              header=u'Name',
          ...                              idx='name', defaultValue='missing'),
          ...             column.addColumn(self, column.GetItemColumn, u'value',
          ...                              header=u'Value',
          ...                              idx='value', defaultValue='missing'),
          ...             ]
          ...     @property
          ...     def values(self):
          ...         return sampleDictData
        
        Render and update the table:
        
          >>> request = TestRequest()
          >>> getDictColumnTable = GetDictColumnTable(sampleDictData, request)
          >>> getDictColumnTable.update()
          >>> print getDictColumnTable.render()
          <table>
            <thead>
              <tr>
                <th>Name</th>
                <th>Value</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td>bar</td>
                <td>7</td>
              </tr>
              <tr>
                <td>foo</td>
                <td>1</td>
              </tr>
              <tr>
                <td>moo</td>
                <td>42</td>
              </tr>
            </tbody>
          </table>
        
        If we use a non-existing index/key, we do not raise an exception, we will
        get the default value:
        
          >>> class GetDictColumnTable(table.Table):
          ...     cssClassSortedOn = None
          ...
          ...     def setUpColumns(self):
          ...         return [
          ...             column.addColumn(self, column.GetItemColumn, u'name',
          ...                              idx='not-existing', defaultValue='missing'),
          ...             ]
          ...     @property
          ...     def values(self):
          ...         return sampleDictData
        
        Render and update the table:
        
          >>> request = TestRequest()
          >>> getDictColumnTable = GetDictColumnTable(container, request)
          >>> getDictColumnTable.update()
          >>> print getDictColumnTable.render()
          <table>
            <thead>
              <tr>
                <th></th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td>missing</td>
              </tr>
              <tr>
                <td>missing</td>
              </tr>
              <tr>
                <td>missing</td>
              </tr>
            </tbody>
          </table>
        
        A missing ``idx`` in ``GetItemColumn`` would also end in return the
        ``defaultValue``:
        
          >>> class BadIdxColumn(column.GetItemColumn):
          ...
          ...     defaultValue = u'missing'
        
          >>> firstItem = sampleDictData[0]
          >>> simpleTable = table.Table(sampleDictData, request)
          >>> badColumn = column.addColumn(simpleTable, BadIdxColumn, u'bad')
          >>> badColumn.renderCell(firstItem)
          u'missing'
        
        Tuple/List-ish
        ...............
        
          >>> sampleTupleData = [
          ...     (50, 'bar'),
          ...     (42, 'cent'),
          ...     (7, 'bild'),]
        
          >>> class GetTupleColumnTable(table.Table):
          ...     cssClassSortedOn = None
          ...
          ...     def setUpColumns(self):
          ...         return [
          ...             column.addColumn(self, column.GetItemColumn, u'name',
          ...                              header=u'Name',
          ...                              idx=1, defaultValue='missing'),
          ...             column.addColumn(self, column.GetItemColumn, u'value',
          ...                              header=u'Value',
          ...                              idx=0, defaultValue='missing'),
          ...             ]
          ...     @property
          ...     def values(self):
          ...         return sampleTupleData
        
        Render and update the table:
        
          >>> request = TestRequest()
          >>> getTupleColumnTable = GetTupleColumnTable(sampleTupleData, request)
          >>> getTupleColumnTable.update()
          >>> print getTupleColumnTable.render()
          <table>
            <thead>
              <tr>
                <th>Name</th>
                <th>Value</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td>bar</td>
                <td>50</td>
              </tr>
              <tr>
                <td>bild</td>
                <td>7</td>
              </tr>
              <tr>
                <td>cent</td>
                <td>42</td>
              </tr>
            </tbody>
          </table>
        
        If we use a non-existing index/key, we do not raise an exception, we will
        get the default value:
        
          >>> class GetTupleColumnTable(table.Table):
          ...     cssClassSortedOn = None
          ...
          ...     def setUpColumns(self):
          ...         return [
          ...             column.addColumn(self, column.GetItemColumn, u'name',
          ...                              idx=42, defaultValue='missing'),
          ...             ]
          ...     @property
          ...     def values(self):
          ...         return sampleTupleData
        
        Render and update the table:
        
          >>> request = TestRequest()
          >>> getTupleColumnTable = GetTupleColumnTable(container, request)
          >>> getTupleColumnTable.update()
          >>> print getTupleColumnTable.render()
          <table>
            <thead>
              <tr>
                <th></th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td>missing</td>
              </tr>
              <tr>
                <td>missing</td>
              </tr>
              <tr>
                <td>missing</td>
              </tr>
            </tbody>
          </table>
        
        A missing ``idx`` in ``GetItemColumn`` would also end in return the
        ``defaultValue``:
        
          >>> class BadIdxColumn(column.GetItemColumn):
          ...
          ...     defaultValue = u'missing'
        
          >>> firstItem = sampleTupleData[0]
          >>> simpleTable = table.Table(sampleTupleData, request)
          >>> badColumn = column.addColumn(simpleTable, BadIdxColumn, u'bad')
          >>> badColumn.renderCell(firstItem)
          u'missing'
        
        
        GetAttrFormatterColumn
        ----------------------
        
        The ``GetAttrFormatterColumn`` column is a get attr column which is able to
        format the value. Let's use the Dublin Core adapter for our sample:
        
          >>> from zope.dublincore.interfaces import IZopeDublinCore
          >>> class GetCreatedColumn(column.GetAttrFormatterColumn):
          ...
          ...     def getValue(self, item):
          ...         dc = IZopeDublinCore(item, None)
          ...         return dc.created
        
          >>> class GetAttrFormatterColumnTable(table.Table):
          ...     cssClassSortedOn = None
          ...
          ...     def setUpColumns(self):
          ...         return [
          ...             column.addColumn(self, GetCreatedColumn, u'created'),
          ...             ]
        
        Render and update the table:
        
          >>> request = TestRequest()
          >>> getAttrFormatterColumnTable = GetAttrFormatterColumnTable(container,
          ...     request)
          >>> getAttrFormatterColumnTable.update()
          >>> print getAttrFormatterColumnTable.render()
          <table>
            <thead>
              <tr>
                <th></th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td>2001 1 1  01:01:01 </td>
              </tr>
              <tr>
                <td>2001 1 1  01:01:01 </td>
              </tr>
              <tr>
                <td>2001 1 1  01:01:01 </td>
              </tr>
              <tr>
                <td>2001 1 1  01:01:01 </td>
              </tr>
              <tr>
                <td>2001 1 1  01:01:01 </td>
              </tr>
            </tbody>
          </table>
        
        
        We can also change the formatter settings in such a column:
        
          >>> class LongCreatedColumn(column.GetAttrFormatterColumn):
          ...
          ...     formatterCategory = u'dateTime'
          ...     formatterLength = u'long'
          ...     formatterCalendar = u'gregorian'
          ...
          ...     def getValue(self, item):
          ...         dc = IZopeDublinCore(item, None)
          ...         return dc.created
        
          >>> class LongFormatterColumnTable(table.Table):
          ...     cssClassSortedOn = None
          ...
          ...     def setUpColumns(self):
          ...         return [
          ...             column.addColumn(self, LongCreatedColumn, u'created'),
          ...             ]
        
        Render and update the table:
        
          >>> request = TestRequest()
          >>> longFormatterColumnTable = LongFormatterColumnTable(container,
          ...     request)
          >>> longFormatterColumnTable.update()
          >>> print longFormatterColumnTable.render()
          <table>
            <thead>
              <tr>
                <th></th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td>2001 1 1  01:01:01 +000</td>
              </tr>
              <tr>
                <td>2001 1 1  01:01:01 +000</td>
              </tr>
              <tr>
                <td>2001 1 1  01:01:01 +000</td>
              </tr>
              <tr>
                <td>2001 1 1  01:01:01 +000</td>
              </tr>
              <tr>
                <td>2001 1 1  01:01:01 +000</td>
              </tr>
            </tbody>
          </table>
        
        
        EMailColumn
        -----------
        
        The ``EMailColumn`` column is ``GetAttrColumn`` which is used to
        display a mailto link. By default in the link content the e-mail
        address is displayed, too.
        
        
          >>> class EMailColumn(column.EMailColumn):
          ...
          ...     attrName = 'email'
          ...     defaultValue = u'missing'
        
          >>> class EMailColumnTable(table.Table):
          ...     cssClassSortedOn = None
          ...
          ...     def setUpColumns(self):
          ...         return [
          ...             column.addColumn(self, EMailColumn, u'email'),
          ...             ]
        
        When a cell does not contain an e-mail address, the ``defaultValue``
        is rendered:
        
          >>> request = TestRequest()
          >>> eMailColumnTable = EMailColumnTable(container, request)
          >>> eMailColumnTable.update()
          >>> print eMailColumnTable.render()
          <table>
            <thead>
              <tr>
                <th>E-Mail</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td><a href="mailto:first@example.com">first@example.com</a></td>
              </tr>
              <tr>
                <td><a href="mailto:second@example.com">second@example.com</a></td>
              </tr>
              <tr>
                <td><a href="mailto:third@example.com">third@example.com</a></td>
              </tr>
              <tr>
                <td><a href="mailto:zero@example.com">zero@example.com</a></td>
              </tr>
              <tr>
                <td>missing</td>
              </tr>
            </tbody>
          </table>
        
        The link content can be overwriten by setting the ``linkContent`` attribute:
        
          >>> class StaticEMailColumn(column.EMailColumn):
          ...
          ...     attrName = 'email'
          ...     defaultValue = u'missing'
          ...     linkContent = 'Mail me'
        
          >>> class StaticEMailColumnTable(table.Table):
          ...     cssClassSortedOn = None
          ...
          ...     def setUpColumns(self):
          ...         return [
          ...             column.addColumn(self, StaticEMailColumn, u'mail'),
          ...             ]
        
        Render and update the table:
        
          >>> request = TestRequest()
          >>> staticEMailColumnTable = StaticEMailColumnTable(container, request)
          >>> staticEMailColumnTable.update()
          >>> print staticEMailColumnTable.render()
          <table>
            <thead>
              <tr>
                <th>E-Mail</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td><a href="mailto:first@example.com">Mail me</a></td>
              </tr>
              <tr>
                <td><a href="mailto:second@example.com">Mail me</a></td>
              </tr>
              <tr>
                <td><a href="mailto:third@example.com">Mail me</a></td>
              </tr>
              <tr>
                <td><a href="mailto:zero@example.com">Mail me</a></td>
              </tr>
              <tr>
                <td>missing</td>
              </tr>
            </tbody>
          </table>
        
        
        LinkColumn
        ----------
        
        Let's define a table using the LinkColumn. This column allows us to write
        columns which can point to a page with the item as context:
        
          >>> class MyLinkColumns(column.LinkColumn):
          ...     linkName = 'myLink.html'
          ...     linkTarget = '_blank'
          ...     linkCSS = 'myClass'
        
          >>> class MyLinkTable(table.Table):
          ...     cssClassSortedOn = None
          ...
          ...     def setUpColumns(self):
          ...         return [
          ...             column.addColumn(self, MyLinkColumns, u'link',
          ...                              weight=1),
          ...             column.addColumn(self, NumberColumn, name=u'number',
          ...                              weight=2, header=u'Number')
          ...             ]
        
        Now create, update and render our table:
        
          >>> from zope.publisher.browser import TestRequest
          >>> request = TestRequest()
          >>> myLinkTable = MyLinkTable(container, request)
          >>> myLinkTable.__parent__ = container
          >>> myLinkTable.__name__ = u'myLinkTable.html'
          >>> myLinkTable.update()
          >>> print myLinkTable.render()
          <table>
            <thead>
              <tr>
                <th>Name</th>
                <th>Number</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td><a href="http://127.0.0.1/container/first/myLink.html" target="_blank" class="myClass">first</a></td>
                <td>number: 1</td>
              </tr>
              <tr>
                <td><a href="http://127.0.0.1/container/fourth/myLink.html" target="_blank" class="myClass">fourth</a></td>
                <td>number: 4</td>
              </tr>
              <tr>
                <td><a href="http://127.0.0.1/container/second/myLink.html" target="_blank" class="myClass">second</a></td>
                <td>number: 2</td>
              </tr>
              <tr>
                <td><a href="http://127.0.0.1/container/third/myLink.html" target="_blank" class="myClass">third</a></td>
                <td>number: 3</td>
              </tr>
              <tr>
                <td><a href="http://127.0.0.1/container/zero/myLink.html" target="_blank" class="myClass">zero</a></td>
                <td>number: 0</td>
              </tr>
            </tbody>
          </table>
        
        
        ContentsLinkColumn
        ------------------
        
        There are some predefined link columns available. This one will generate a
        ``contents.html`` link for each item:
        
          >>> class ContentsLinkTable(table.Table):
          ...     cssClassSortedOn = None
          ...
          ...     def setUpColumns(self):
          ...         return [
          ...             column.addColumn(self, column.ContentsLinkColumn, u'link',
          ...                              weight=1),
          ...             column.addColumn(self, NumberColumn, name=u'number',
          ...                              weight=2, header=u'Number')
          ...             ]
        
          >>> contentsLinkTable = ContentsLinkTable(container, request)
          >>> contentsLinkTable.__parent__ = container
          >>> contentsLinkTable.__name__ = u'contentsLinkTable.html'
          >>> contentsLinkTable.update()
          >>> print contentsLinkTable.render()
          <table>
            <thead>
              <tr>
                <th>Name</th>
                <th>Number</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td><a href="http://127.0.0.1/container/first/contents.html">first</a></td>
                <td>number: 1</td>
              </tr>
              <tr>
                <td><a href="http://127.0.0.1/container/fourth/contents.html">fourth</a></td>
                <td>number: 4</td>
              </tr>
              <tr>
                <td><a href="http://127.0.0.1/container/second/contents.html">second</a></td>
                <td>number: 2</td>
              </tr>
              <tr>
                <td><a href="http://127.0.0.1/container/third/contents.html">third</a></td>
                <td>number: 3</td>
              </tr>
              <tr>
                <td><a href="http://127.0.0.1/container/zero/contents.html">zero</a></td>
                <td>number: 0</td>
              </tr>
            </tbody>
          </table>
        
        
        IndexLinkColumn
        ---------------
        
        This one will generate a ``index.html`` link for each item:
        
          >>> class IndexLinkTable(table.Table):
          ...     cssClassSortedOn = None
          ...
          ...     def setUpColumns(self):
          ...         return [
          ...             column.addColumn(self, column.IndexLinkColumn, u'link',
          ...                              weight=1),
          ...             column.addColumn(self, NumberColumn, name=u'number',
          ...                              weight=2, header=u'Number')
          ...             ]
        
          >>> indexLinkTable = IndexLinkTable(container, request)
          >>> indexLinkTable.__parent__ = container
          >>> indexLinkTable.__name__ = u'indexLinkTable.html'
          >>> indexLinkTable.update()
          >>> print indexLinkTable.render()
          <table>
            <thead>
              <tr>
                <th>Name</th>
                <th>Number</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td><a href="http://127.0.0.1/container/first/index.html">first</a></td>
                <td>number: 1</td>
              </tr>
              <tr>
                <td><a href="http://127.0.0.1/container/fourth/index.html">fourth</a></td>
                <td>number: 4</td>
              </tr>
              <tr>
                <td><a href="http://127.0.0.1/container/second/index.html">second</a></td>
                <td>number: 2</td>
              </tr>
              <tr>
                <td><a href="http://127.0.0.1/container/third/index.html">third</a></td>
                <td>number: 3</td>
              </tr>
              <tr>
                <td><a href="http://127.0.0.1/container/zero/index.html">zero</a></td>
                <td>number: 0</td>
              </tr>
            </tbody>
          </table>
        
        
        EditLinkColumn
        --------------
        
        And this one will generate a ``edit.html`` link for each item:
        
          >>> class EditLinkTable(table.Table):
          ...     cssClassSortedOn = None
          ...
          ...     def setUpColumns(self):
          ...         return [
          ...             column.addColumn(self, column.EditLinkColumn, u'link',
          ...                              weight=1),
          ...             column.addColumn(self, NumberColumn, name=u'number',
          ...                              weight=2, header=u'Number')
          ...             ]
        
          >>> editLinkTable = EditLinkTable(container, request)
          >>> editLinkTable.__parent__ = container
          >>> editLinkTable.__name__ = u'editLinkTable.html'
          >>> editLinkTable.update()
          >>> print editLinkTable.render()
          <table>
            <thead>
              <tr>
                <th>Name</th>
                <th>Number</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td><a href="http://127.0.0.1/container/first/edit.html">first</a></td>
                <td>number: 1</td>
              </tr>
              <tr>
                <td><a href="http://127.0.0.1/container/fourth/edit.html">fourth</a></td>
                <td>number: 4</td>
              </tr>
              <tr>
                <td><a href="http://127.0.0.1/container/second/edit.html">second</a></td>
                <td>number: 2</td>
              </tr>
              <tr>
                <td><a href="http://127.0.0.1/container/third/edit.html">third</a></td>
                <td>number: 3</td>
              </tr>
              <tr>
                <td><a href="http://127.0.0.1/container/zero/edit.html">zero</a></td>
                <td>number: 0</td>
              </tr>
            </tbody>
          </table>
        
        
        Miscellaneous
        -------------
        
        Make coverage report happy and test different things.
        
        Test if the getWeight method returns 0 (zero) on AttributeError:
        
          >>> from z3c.table.table import getWeight
          >>> getWeight(None)
          0
        
        Create a container:
        
          >>> from z3c.table.testing import Container
          >>> container = Container()
        
        Try to call a simple table and call renderBatch which should return an empty
        string:
        
          >>> from z3c.table import table
          >>> from zope.publisher.browser import TestRequest
          >>> request = TestRequest()
          >>> simpleTable = table.Table(container, request)
          >>> simpleTable.renderBatch()
          u''
        
        Try to render an empty table adapting an empty mapping:
        
          >>> simpleTable = table.Table({}, request)
          >>> simpleTable.cssClassSortedOn = None
          >>> simpleTable.render()
          u''
        
        Since we register an adapter for IColumn on None (IOW on an empty mapping).
        
          >>> from zope.component import provideAdapter
          >>> from z3c.table import column
          >>> from z3c.table import interfaces
          >>> provideAdapter(column.NameColumn,
          ...     (None, None, interfaces.ITable), provides=interfaces.IColumn,
          ...      name='secondColumn')
        
        Initializing rows definitions for the empty table initializes the columns
        attribute list.
        
          >>> simpleTable.columns
        
          >>> simpleTable.initColumns()
          >>> simpleTable.columns
          [<NameColumn u'secondColumn'>]
        
        Rendering the empty table now return the string:
        
          >>> print simpleTable.render()
          <table>
            <thead>
              <tr>
                <th>Name</th>
              </tr>
            </thead>
            <tbody>
            </tbody>
          </table>
        
        
        Let's see if the addColumn raises a ValueError if there is no Column class:
        
          >>> column.addColumn(simpleTable, column.Column, u'dummy')
          <Column u'dummy'>
        
          >>> column.addColumn(simpleTable, None, u'dummy')
          Traceback (most recent call last):
          ...
          ValueError: class_ None must implement IColumn.
        
        Test if we can set additional kws in addColumn:
        
          >>> simpleColumn = column.addColumn(simpleTable, column.Column, u'dummy',
          ...     foo='foo value', bar=u'something else', counter=99)
          >>> simpleColumn.foo
          'foo value'
        
          >>> simpleColumn.bar
          u'something else'
        
          >>> simpleColumn.counter
          99
        
        The NoneCell class provides some methods which never get called. But these
        are defined in the interface. Let's test the default values
        and make coverage report happy.
        
        Let's get an container item first:
        
          >>> from z3c.table.testing import Content
          >>> firstItem = Content('First', 1)
          >>> noneCellColumn = column.addColumn(simpleTable, column.NoneCell, u'none')
          >>> noneCellColumn.renderCell(firstItem)
          u''
        
          >>> noneCellColumn.getColspan(firstItem)
          0
        
          >>> noneCellColumn.renderHeadCell()
          u''
        
          >>> noneCellColumn.renderCell(firstItem)
          u''
        
        The default ``Column`` implementation raises an NotImplementedError if we
        do not override the renderCell method:
        
          >>> defaultColumn = column.addColumn(simpleTable, column.Column, u'default')
          >>> defaultColumn.renderCell(firstItem)
          Traceback (most recent call last):
          ...
          NotImplementedError: Subclass must implement renderCell
        
        
        =======
        CHANGES
        =======
        
        1.0.0 (2012-08-09)
        ------------------
        
        - Added sorting (``cssClassSortedOn`` and ``getCSSSortClass``) CSS options
        
        - Added cell highlight (``getCSSHighlightClass``) CSS option
        
        - Added ``GetItemColumn`` which gets the value by index/key access.
        
        0.9.1 (2011-08-03)
        ------------------
        
        - Fixed SelectedItemColumn.update when just one item was selected
        
        
        0.9.0 (2010-08-09)
        ------------------
        
        - Added ``EMailColumn`` which can be used to display mailto links.
        
        - Fixed the default BatchProvider not to lose table sorting query arguments
          from the generated links; now batching and sorting play with each other
          nicely.
        
        - Split single doctest file (README.txt) into different files
        
        
        0.8.1 (2010-07-31)
        ------------------
        
        - Added translation for the link title in the column header of the
          sortable table.
        
        
        0.8.0 (2009-12-29)
        ------------------
        
        - Added translation for ``LinkColumn.linkContent``.
        
        - Added ``I18nGetAttrColumn`` which translates its content.
        
        
        0.7.0 (2009-12-29)
        ------------------
        
        - Allow to initialze the column definitions without requiring an
          entire table update.
        
        - Fixed tests, so they no longer use ``zope.app.container`` (which was
          even not declared as test dependency).
        
        - Head cell contents are now translated.
        
        0.6.1 (2009-02-22)
        ------------------
        
        - Be smart to not ``IPhysicallyLocatable`` objects if we lookup the
          ``__name__`` value in columns.
        
        
        0.6.0 (2008-11-12)
        ------------------
        
        - Bugfix: Allow to switch the sort order on the header link. This was
          blocked to descending after the first click
        
        - Bugfix: CheckBoxColumn, ensure that we allways use a list for compare
          selected items. It was possible that if only one item get selected
          we compared a string. If this string was a sub string of another existing
          item the other item get selected too.
        
        - Moved advanced batching implementation into z3c.batching
        
        - Implemented GetAttrFormatterColumn. This column can be used for simple
          value formatting columns.
        
        - Bad typo in columns.py: Renamed ``getLinkConent`` to ``getLinkContent``
        
        - Bug: Changed return string in getLinkCSS. It was using css="" instead of
          class="" for CSS classes. Thanks to Dan for reporting this bugs.
        
        - Implemented SelectedItemColumn
        
        - Fix CheckBoxColumn, use always the correct selectedItems. Use always real
          selectedItems form the table
        
        - Fix RadioColumn, use always the correct selectedItem from the selectedItems
          list. Use always the first selectedItems form the tables selectedItems
        
        
        0.5.0 (2008-04-13)
        ------------------
        
        - Initial Release.
        
Keywords: zope3 z3c table content provider
Platform: UNKNOWN
Classifier: Development Status :: 4 - Beta
Classifier: Environment :: Web Environment
Classifier: Intended Audience :: Developers
Classifier: License :: OSI Approved :: Zope Public License
Classifier: Programming Language :: Python
Classifier: Natural Language :: English
Classifier: Operating System :: OS Independent
Classifier: Topic :: Internet :: WWW/HTTP
Classifier: Framework :: Zope3
