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""" 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('', 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 self._calendar.tag_configure('header', background='grey90') self._calendar.insert('', 'end', values=cols, tag='header') # adjust its columns width font = tkFont.Font() maxwidth = max(font.measure(col) for col in cols) for col in cols: self._calendar.column(col, width=maxwidth, minwidth=maxwidth, anchor='e') def __setup_selection(self, sel_bg, sel_fg): self._font = tkFont.Font() self._canvas = canvas = Tkinter.Canvas(self._calendar, background=sel_bg, borderwidth=0, highlightthickness=0) canvas.text = canvas.create_text(0, 0, fill=sel_fg, anchor='w') canvas.bind('', lambda evt: canvas.place_forget()) self._calendar.bind('', lambda evt: canvas.place_forget()) self._calendar.bind('', self._pressed) def __minsize(self, evt): width, height = self._calendar.master.geometry().split('x') height = height[:height.index('+')] self._calendar.master.minsize(width, height) def _build_calendar(self): year, month = self._date.year, self._date.month # update header text (Month, YEAR) header = self._cal.formatmonthname(year, month, 0) self._header['text'] = header.title() # update calendar shown dates cal = self._cal.monthdayscalendar(year, month) for indx, item in enumerate(self._items): week = cal[indx] if indx < len(cal) else [] fmt_week = [('%02d' % day) if day else '' for day in week] self._calendar.item(item, values=fmt_week) def _show_selection(self, text, bbox): """Configure canvas for a new selection.""" x, y, width, height = bbox textw = self._font.measure(text) canvas = self._canvas canvas.configure(width=width, height=height) canvas.coords(canvas.text, width - textw, height / 2 - 1) canvas.itemconfigure(canvas.text, text=text) canvas.place(in_=self._calendar, x=x, y=y) # Callbacks def _pressed(self, evt): """Clicked somewhere in the calendar.""" x, y, widget = evt.x, evt.y, evt.widget item = widget.identify_row(y) column = widget.identify_column(x) if not column or not item in self._items: # clicked in the weekdays row or just outside the columns return item_values = widget.item(item)['values'] if not len(item_values): # row is empty for this month return text = item_values[int(column[1]) - 1] if not text: # date is empty return bbox = widget.bbox(item, column) if not bbox: # calendar not visible yet return # update and then show selection text = '%02d' % text self._selection = (text, item, column) self._show_selection(text, bbox) def _prev_month(self): """Updated calendar to show the previous month.""" self._canvas.place_forget() self._date = self._date - self.timedelta(days=1) self._date = self.datetime(self._date.year, self._date.month, 1) self._build_calendar() # reconstuct calendar def _next_month(self): """Update calendar to show the next month.""" self._canvas.place_forget() year, month = self._date.year, self._date.month self._date = self._date + self.timedelta( days=calendar.monthrange(year, month)[1] + 1) self._date = self.datetime(self._date.year, self._date.month, 1) self._build_calendar() # reconstruct calendar # Properties @property def selection(self): """Return a datetime representing the current selected date.""" if not self._selection: return None year, month = self._date.year, self._date.month return self.datetime(year, month, int(self._selection[0])) def test(): import sys root = Tkinter.Tk() root.title('Ttk Calendar') ttkcal = Calendar(firstweekday=calendar.SUNDAY) ttkcal.pack(expand=1, fill='both') if 'win' not in sys.platform: style = ttk.Style() style.theme_use('clam') root.mainloop() if __name__ == '__main__': test()