The Photo Calendar Program is released under the GNU General Public License.
calendar.htmlpage is a master frameset for a three frame display. The left frame is an input form controlling the calendar configuration. The upper right frame displays a calendar block. The lower right frame displays a table of date notation selections. The calendar page loads the Notation database, including any user supplied plugin files. It restores the calendar PageState from a browser cookie then calls the initialization function for the input form.
cal_edit.html page implements the input form with event
handlers that respond to user input. It manages the form state values
and updates the calendar block and notation table when necessary. The calendar
format settings are maintained in a browser cookie for the duration of the
loading.html page provides a document for dynamically updating
the calendar block. Its purpose is to rewrite itself in response to update
commands from the input form. This is accomplished with help from the
PageState and CalendarPage classes.
page_state.js module implements the PageState class, which
manages the calendar page state variables. The current year and month are used
to generate the basic calendar block. These two parameters are maintained in a
CalendarState browser cookie for the duration of the of the current session.
The other state parameters (photo, caption and copyright) are maintained in a
persistent browser cookie with an expiration set at 400 days. The month and year
are prefixed to the cookie name so that each calendar page has a separate state
cookie. In response to calls from the input page event handlers, the PageState
module notes changes to the state variables and updates the current cookie
whenever the photo, caption or copyright are modified. It loads a new state
cookie when the month or year changes.
cal_page.js module implements the CalendarPage class, which
provides functions that generate HTML text for the calendar. It has two top
level entry points. One generates the full calendar page with photo, caption
and copyright. The other generates only the date block. User defined calendar
page parameters are copied from the current PageState. Calendar format settings
are applied directly by event handlers that service the option checkboxes on
the input page. Browser specific page layout parameters are initialized in the
dates.html page provides a document for dynamically displaying
a table of calendar notation selections. The page rewrites itself in response to
update commands triggered from the input form. The current Notation selection
list is used to generate the table, including checkboxes to toggle the
enable/disable state. An event handler posts changes in the notation state then
updates the calendar block.
notation.js module implements the Notation class, which manages
the calendar notation database. The database is built from four component
holidays.js, astronomical.js, religious.js, personal.js
along with any user supplied plugins. The notation selection list is updated
whenever the year or month is changed on the input form. The selection table
on the dates page is then updated to display the new list of notations. The
enable/disable state of all notations is maintained in a browser cookie for the
duration of the current session.
simple_cookie.js module implements the SimpleCookie class. This
is a general purpose class for saving and restoring browser cookies. By default,
cookies expire at the end of the current browser session. The "days" parameter
of the save function allows a cookie to persist for a specified period of
days. The CalendarState class is used to calculate the expiration date.
cal_state.js module implements the CalendarState class. This is
a general purpose class for performing date calculations with the Gregorian
calendar. It is primarily used for determining the day of the week for a
specified date or calculating the year/month/day of a date which is offset a
specified number of days foreward or backward. The algorithms are very efficient
and require only simple integer arithmetic. The SimpleCookie class is used to
save or restore dates as browser cookies.
os_fix.js module defines the master kluge enable flags for
fixing compatability problems with various browsers.
selection.html page is a simple demonstration of the plugin
capability for customizing the Notation database. The page is dynamically
constructed from a database supplied in the
Three demonstration modules:
family.js, friends.js, business.js
provide trivial examples of custom notations. You can easily modify these files
to meet your personal needs.