Module calendar

A simple calendar widget. (feature: widget-calendar)

The Monthly widget will display a calendar for the month provided in display_date. Days are styled using the default style unless:

• show_surrounding is set, then days not in the display_date month will use that style.
• a style is returned by the DateStyler for the day

Monthly has several controls for what should be displayed

Structs

• CalendarEventStore
  A simple DateStyler based on a HashMap
• Monthly
  Display a month calendar for the month containing display_date

Traits

• DateStyler
  Provides a method for styling a given date. Monthly is generic on this trait, so any type that implements this trait can be used.