Module reahl.web.pager¶

Tools for breaking long lists into shorter lists that can be paged.

PageMenu¶

class reahl.web.pager.PageMenu(view, css_id, page_index, paged_panel)¶

An Menu, which lists the pages of items that can be navigated by a user. If there are many pages, only a small subset is shown, with controls allowing the user to browse to the wanted page number and choose it.

Styling

Rendered as a <ul class=”reahl-menu reahl-pagemenu”>. The <a> inside its first <li> has class=”first”, the <a> in the second <li> has class=”prev”. The <a> in the second last <li> has class=”next”, and the <a> in the last <li> has class=”last”.

Parameters:	view – (See `reahl.web.fw.Widget`) css_id – (See `HTMLElement`) page_index – The `PageIndex` whose pages are displayed by this PageMenu. page_container – The `PagedPanel` in which the contents of a page is displayed.

PagedPanel¶

class reahl.web.pager.PagedPanel(view, page_index, css_id)¶

A Panel whose contents change, depending on the page selected by a user from a PageMenu. A programmer should subclass from PagedPanel, supplying an __init__ method which populates the PagedPanel with appropriate contents, based on its .current_contents.

Styling

Represented in HTML by an <div> element.

Parameters:	view – (See `reahl.web.fw.Widget`) page_index – The `PageIndex` to use to supply contents to the pages displayed by this PagedPanel. css_id – (See `HTMLElement`)

current_contents¶: The list of items that should be displayed for the current page.

PageIndex¶

class reahl.web.pager.PageIndex(current_page_number=1, start_page_number=1, max_page_links=5)¶

An object responsible for breaking a long list of items up into shorter lists for display. Each such shorter list is referred to as a page. Different ways of breaking long lists into smaller lists are provided by subclasses.

Parameters:	current_page_number – The initial page shown to users. start_page_number – The first page that should be listed in the current `PageMenu`. max_page_links – The number of pages to be shown in the current `PageMenu`.

get_contents_for_page(page_number)¶: Override this method in subclasses to obtain the correct list of items for the given page_number.

total_number_of_pages¶: Override this @property in subclasses to state what the total number of pages is.

SequentialPageIndex¶

class reahl.web.pager.SequentialPageIndex(items, items_per_page=5, current_page_number=1, start_page_number=1, max_page_links=4)¶

A PageIndex that breaks a list of items up into smaller lists, by cutting the original list into sections that have a maximum number of items per page.

Parameters:	items – The long list of items. items_per_page – The maximum number of items to allow on a page. current_page_number – (See `PageIndex`) start_page_number – (See `PageIndex`) max_page_links – (See `PageIndex`)

AnnualPageIndex¶

class reahl.web.pager.AnnualPageIndex(annual_item_organiser, current_page_number=1, start_page_number=1, max_page_links=4)¶

A PageIndex that breaks a list of items up into smaller lists, by arranging all items that have the same year on the same page.

Parameters:	annual_item_organiser – An object that implements `AnnualItemOrganiserProtocol`. Its methods will be called to find the relevent items, or determine what years are applicable. current_page_number – (See `PageIndex`) start_page_number – (See `PageIndex`) max_page_links – (See `PageIndex`)

AnnualItemOrganiserProtocol¶

class reahl.web.pager.AnnualItemOrganiserProtocol¶

Manages a list of items, each of which is seen to be for a particular year.

get_years()¶: Returns a list of integers, each representing a year which is applicable to at least one item in a list of items.

get_items_for_year(year)¶: Returns a list if items to which year (an integer) is applicable.

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