General/WeekControl is a subproject of General/CalendarControl hosted at http://code.google.com/p/calendarcontrol. It draws a more convenient way of representing the weekdays than having seven separate checkboxes. The control is fully resolution independent and is available under the New BSD license.
General/WeekControl is dependent on another one of my projects Amber.framework which is available at http://code.google.com/p/amber-framework.
It access’ your model data using datasource callbacks as part of a formal protocol:
@protocol General/KDWeekViewDataSourceProtocol <General/NSObject>