使用ttk日曆的Python tkinter

Question

我正在使用this代碼在我的Tkinter上創建一個簡單的日曆。當我在主根窗口上放置日曆時，日曆顯示得很好。所以，我決定放置另一個按鈕，它將創建一個Tkinter頂層窗口，並在頂層窗口中放置另外一個日曆。但是這次它沒有顯示日曆，而是它給了我這個錯誤，" TclError: can't pack .18913120 inside .18912200.18912400"。任何人都可以解釋爲什麼我得到這個錯誤信息。

這是我的示例代碼：

這個小部件的

import calendar 
import sys 
try: 
    import Tkinter 
    import tkFont 
except ImportError: # py3k 
    import tkinter as Tkinter 
    import tkinter.font as 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 
     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('<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 myfunction(): 
    root2=Tkinter.Toplevel(root) 
    ttkcal = Calendar(root2,firstweekday=calendar.SUNDAY) 
    ttkcal.pack(expand=1, fill='both') 

root=Tkinter.Tk() 

frame=Tkinter.Frame(root) 
frame.pack(side="left") 

button=Tkinter.Button(root,text="Top level",command=myfunction) 
button.pack(side="right") 

ttkcal = Calendar(frame,firstweekday=calendar.SUNDAY) 
ttkcal.pack(expand=1, fill='both') 
root.mainloop() 

Answer 1

作者用一個不必要的行動：這個小部件設置根窗口的最小尺寸，並且他認爲這是一個程序的唯一窗口（它不是bug，它的特點）。

1.In方法def __place_widgets(self)：

self._calendar = ttk.Treeview(show='', selectmode='none', height=7) 

應該是：

self._calendar = ttk.Treeview(self, show='', selectmode='none', height=7) 

2.In構造刪除行：

self._calendar.bind('<Map>', self.__minsize) 

3.刪除__minsize方法
4。如果你想設置最小的si ze for root2使用此代碼：

def myfunction(): 
    root2=Tkinter.Toplevel(root) 
    ttkcal = Calendar(root2,firstweekday=calendar.SUNDAY) 
    ttkcal.pack(expand=1, fill='both') 
    root2.update() 
    root2.minsize(root2.winfo_reqwidth(), root2.winfo_reqheight())