1
  9   	ˆl–Ým_JJh¥ ² ¸È®2ò˜´oÁƒy»a–Ým_J	å2ÛR‚ œP@¸'î4ú˜´oÅ  }    	"""
Simple calendar using ttk Treeview together with calendar and datetime
classes.
"""
import calendar
import Tkinter
import tkFont
import ttk

def get_calendar(locale, fwday):
    # instantiate proper calendar class
    if locale is None:
        return calendar.TextCalendar(fwday)
    else:
        return calendar.LocaleTextCalendar(fwday, locale)

class Calendar(ttk.Frame):
    # XXX ToDo: cget and configure

    datetime = calendar.datetime.datetime
    timedelta = calendar.datetime.timedelta

    def __init__(self, master=None, **kw):
        """
        WIDGET-SPECIFIC OPTIONS

            locale, firstweekday, year, month, selectbackground,
            selectforeground
        """
        # remove custom options from kw before initializating ttk.Frame
        fwday = kw.pop('firstweekday', calendar.MONDAY)
        year = kw.pop('year', self.datetime.now().year)
        month = kw.pop('month', self.datetime.now().month)
        locale = kw.pop('locale', None)
        sel_bg = kw.pop('selectbackground', '#ecffc4')
        sel_fg = kw.pop('selectforeground', '#05640e')

        self._date = self.datetime(year, month, 1)
        self._selection = None # no date selected

        ttk.Frame.__init__(self, master, **kw)

        self._cal = get_calendar(locale, fwday)

        self.__setup_styles()       # creates custom styles
        self.__place_widgets()      # pack/grid used widgets
        self.__config_calendar()    # adjust calendar columns and setup tags
        # configure a canvas, and proper bindings, for selecting dates
        self.__setup_selection(sel_bg, sel_fg)

        # store items ids, used for insertion later
        self._items = [self._calendar.insert('', 'end', values='')
                            for _ in range(6)]
        # insert dates in the currently empty calendar
        self._build_calendar()

        # set the minimal size for the widget
        self._calendar.bind('<Map>', self.__minsize)

    def __setitem__(self, item, value):
        if item in ('year', 'month'):
            raise AttributeError("attribute '%s' is not writeable" % item)
        elif item == 'selectbackground':
            self._canvas['background'] = value
        elif item == 'selectforeground':
            self._canvas.itemconfigure(self._canvas.text, item=value)
        else:
            ttk.Frame.__setitem__(self, item, value)

    def __getitem__(self, item):
        if item in ('year', 'month'):
            return getattr(self._date, item)
        elif item == 'selectbackground':
            return self._canvas['background']
        elif item == 'selectforeground':
            return self._canvas.itemcget(self._canvas.text, 'fill')
        else:
            r = ttk.tclobjs_to_py({item: ttk.Frame.__getitem__(self, item)})
            return r[item]

    def __setup_styles(self):
        # custom ttk styles
        style = ttk.Style(self.master)
        arrow_layout = lambda dir: (
            [('Button.focus', {'children': [('Button.%sarrow' % dir, None)]})]
        )
        style.layout('L.TButton', arrow_layout('left'))
        style.layout('R.TButton', arrow_layout('right'))

    def __place_widgets(self):
        # header frame and its widgets
        hframe = ttk.Frame(self)
        lbtn = ttk.Button(hframe, style='L.TButton', command=self._prev_month)
        rbtn = ttk.Button(hframe, style='R.TButton', command=self._next_month)
        self._header = ttk.Label(hframe, width=15, anchor='center')
        # the calendar
        self._calendar = ttk.Treeview(show='', selectmode='none', height=7)

        # pack the widgets
        hframe.pack(in_=self, side='top', pady=4, anchor='center')
        lbtn.grid(in_=hframe)
        self._header.grid(in_=hframe, column=1, row=0, padx=12)
        rbtn.grid(in_=hframe, column=2, row=0)
        self._calendar.pack(in_=self, expand=1, fill='both', side='bottom')

    def __config_calendar(self):
        cols = self._cal.formatweekheader(3).split()
        self._calendar['columns'] = cols