| """ |
| Simple calendar using ttk Treeview together with calendar and datetime |
| classes. |
| """ |
| import calendar |
| import tkinter |
| import tkinter.font |
| from tkinter 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 |
| self._calendar.tag_configure('header', background='grey90') |
| self._calendar.insert('', 'end', values=cols, tag='header') |
| # adjust its columns width |
| font = tkinter.font.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 = tkinter.font.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('<ButtonPress-1>', lambda evt: canvas.place_forget()) |
| self._calendar.bind('<Configure>', lambda evt: canvas.place_forget()) |
| self._calendar.bind('<ButtonPress-1>', 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() |