怎么在Python中使用tkinter实现一个下拉日历控件-创新互联
今天就跟大家聊聊有关怎么在Python中使用tkinter实现一个下拉日历控件，可能很多人都不太了解，为了让大家更加了解，小编给大家总结了以下内容，希望大家根据这篇文章可以有所收获。
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如下所示：
# -*- coding: utf-8 -*-
import calendar
import tkinter as tk
import tkinter.font as tkFont
from tkinter import ttk
datetime = calendar.datetime.datetime
timedelta = calendar.datetime.timedelta
class Calendar:
def __init__(s, point = None, position = None):
# point 提供一个基点，来确定窗口位置
# position 窗口在点的位置 'ur'-右上, 'ul'-左上, 'll'-左下, 'lr'-右下
#s.master = tk.Tk()
s.master = tk.Toplevel()
s.master.withdraw()
fwday = calendar.SUNDAY
year = datetime.now().year
month = datetime.now().month
locale = None
sel_bg = '#ecffc4'
sel_fg = '#05640e'
s._date = datetime(year, month, 1)
s._selection = None # 设置为未选中日期
s.G_Frame = ttk.Frame(s.master)
s._cal = s.__get_calendar(locale, fwday)
s.__setup_styles() # 创建自定义样式
s.__place_widgets() # pack/grid 小部件
s.__config_calendar() # 调整日历列和安装标记
# 配置画布和正确的绑定，以选择日期。
s.__setup_selection(sel_bg, sel_fg)
# 存储项ID，用于稍后插入。
s._items = [s._calendar.insert('', 'end', values='') for _ in range(6)]
# 在当前空日历中插入日期
s._update()
s.G_Frame.pack(expand = 1, fill = 'both')
s.master.overrideredirect(1)
s.master.update_idletasks()
width, height = s.master.winfo_reqwidth(), s.master.winfo_reqheight()
if point and position:
if position == 'ur': x, y = point[0], point[1] - height
elif position == 'lr': x, y = point[0], point[1]
elif position == 'ul': x, y = point[0] - width, point[1] - height
elif position == 'll': x, y = point[0] - width, point[1]
else: x, y = (s.master.winfo_screenwidth() - width)/2, (s.master.winfo_screenheight() - height)/2
s.master.geometry('%dx%d+%d+%d' % (width, height, x, y)) #窗口位置居中
s.master.after(300, s._main_judge)
s.master.deiconify()
s.master.focus_set()
s.master.wait_window() #这里应该使用wait_window挂起窗口，如果使用mainloop,可能会导致主程序很多错误
def __get_calendar(s, locale, fwday):
# 实例化适当的日历类
if locale is None:
return calendar.TextCalendar(fwday)
else:
return calendar.LocaleTextCalendar(fwday, locale)
def __setitem__(s, item, value):
if item in ('year', 'month'):
raise AttributeError("attribute '%s' is not writeable" % item)
elif item == 'selectbackground':
s._canvas['background'] = value
elif item == 'selectforeground':
s._canvas.itemconfigure(s._canvas.text, item=value)
else:
s.G_Frame.__setitem__(s, item, value)
def __getitem__(s, item):
if item in ('year', 'month'):
return getattr(s._date, item)
elif item == 'selectbackground':
return s._canvas['background']
elif item == 'selectforeground':
return s._canvas.itemcget(s._canvas.text, 'fill')
else:
r = ttk.tclobjs_to_py({item: ttk.Frame.__getitem__(s, item)})
return r[item]
def __setup_styles(s):
# 自定义TTK风格
style = ttk.Style(s.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(s):
# 标头框架及其小部件
Input_judgment_num = s.master.register(s.Input_judgment) # 需要将函数包装一下，必要的
hframe = ttk.Frame(s.G_Frame)
gframe = ttk.Frame(s.G_Frame)
bframe = ttk.Frame(s.G_Frame)
hframe.pack(in_=s.G_Frame, side='top', pady=5, anchor='center')
gframe.pack(in_=s.G_Frame, fill=tk.X, pady=5)
bframe.pack(in_=s.G_Frame, side='bottom', pady=5)
lbtn = ttk.Button(hframe, style='L.TButton', command=s._prev_month)
lbtn.grid(in_=hframe, column=0, row=0, padx=12)
rbtn = ttk.Button(hframe, style='R.TButton', command=s._next_month)
rbtn.grid(in_=hframe, column=5, row=0, padx=12)
s.CB_year = ttk.Combobox(hframe, width = 5, values = [str(year) for year in range(datetime.now().year, datetime.now().year-11,-1)], validate = 'key', validatecommand = (Input_judgment_num, '%P'))
s.CB_year.current(0)
s.CB_year.grid(in_=hframe, column=1, row=0)
s.CB_year.bind('', lambda event:s._update(event, True))
s.CB_year.bind("<>", s._update)
tk.Label(hframe, text = '年', justify = 'left').grid(in_=hframe, column=2, row=0, padx=(0,5))
s.CB_month = ttk.Combobox(hframe, width = 3, values = ['%02d' % month for month in range(1,13)], state = 'readonly')
s.CB_month.current(datetime.now().month - 1)
s.CB_month.grid(in_=hframe, column=3, row=0)
s.CB_month.bind("<>", s._update)
tk.Label(hframe, text = '月', justify = 'left').grid(in_=hframe, column=4, row=0)
# 日历部件
s._calendar = ttk.Treeview(gframe, show='', selectmode='none', height=7)
s._calendar.pack(expand=1, fill='both', side='bottom', padx=5)
ttk.Button(bframe, text = "确 定", width = 6, command = lambda: s._exit(True)).grid(row = 0, column = 0, sticky = 'ns', padx = 20)
ttk.Button(bframe, text = "取 消", width = 6, command = s._exit).grid(row = 0, column = 1, sticky = 'ne', padx = 20)
tk.Frame(s.G_Frame, bg = '#565656').place(x = 0, y = 0, relx = 0, rely = 0, relwidth = 1, relheigh = 2/200)
tk.Frame(s.G_Frame, bg = '#565656').place(x = 0, y = 0, relx = 0, rely = 198/200, relwidth = 1, relheigh = 2/200)
tk.Frame(s.G_Frame, bg = '#565656').place(x = 0, y = 0, relx = 0, rely = 0, relwidth = 2/200, relheigh = 1)
tk.Frame(s.G_Frame, bg = '#565656').place(x = 0, y = 0, relx = 198/200, rely = 0, relwidth = 2/200, relheigh = 1)
def __config_calendar(s):
# cols = s._cal.formatweekheader(3).split()
cols = ['日','一','二','三','四','五','六']
s._calendar['columns'] = cols
s._calendar.tag_configure('header', background='grey90')
s._calendar.insert('', 'end', values=cols, tag='header')
# 调整其列宽
font = tkFont.Font()
maxwidth = max(font.measure(col) for col in cols)
for col in cols:
s._calendar.column(col, width=maxwidth, minwidth=maxwidth,
anchor='center')
def __setup_selection(s, sel_bg, sel_fg):
def __canvas_forget(evt):
canvas.place_forget()
s._selection = None
s._font = tkFont.Font()
s._canvas = canvas = tk.Canvas(s._calendar, background=sel_bg, borderwidth=0, highlightthickness=0)
canvas.text = canvas.create_text(0, 0, fill=sel_fg, anchor='w')
canvas.bind('', __canvas_forget)
s._calendar.bind('', __canvas_forget)
s._calendar.bind('', s._pressed)
def _build_calendar(s):
year, month = s._date.year, s._date.month
# update header text (Month, YEAR)
header = s._cal.formatmonthname(year, month, 0)
# 更新日历显示的日期
cal = s._cal.monthdayscalendar(year, month)
for indx, item in enumerate(s._items):
week = cal[indx] if indx < len(cal) else []
fmt_week = [('%02d' % day) if day else '' for day in week]
s._calendar.item(item, values=fmt_week)
def _show_select(s, text, bbox):
"""为新的选择配置画布。"""
x, y, width, height = bbox
textw = s._font.measure(text)
canvas = s._canvas
canvas.configure(width = width, height = height)
canvas.coords(canvas.text, (width - textw)/2, height / 2 - 1)
canvas.itemconfigure(canvas.text, text=text)
canvas.place(in_=s._calendar, x=x, y=y)
def _pressed(s, evt = None, item = None, column = None, widget = None):
"""在日历的某个地方点击。"""
if not item:
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 s._items:
# 在工作日行中单击或仅在列外单击。
return
item_values = widget.item(item)['values']
if not len(item_values): # 这个月的行是空的。
return
text = item_values[int(column[1]) - 1]
if not text: # 日期为空
return
bbox = widget.bbox(item, column)
if not bbox: # 日历尚不可见
s.master.after(20, lambda : s._pressed(item = item, column = column, widget = widget))
return
# 更新，然后显示选择
text = '%02d' % text
s._selection = (text, item, column)
s._show_select(text, bbox)
def _prev_month(s):
"""更新日历以显示前一个月。"""
s._canvas.place_forget()
s._selection = None
s._date = s._date - timedelta(days=1)
s._date = datetime(s._date.year, s._date.month, 1)
s.CB_year.set(s._date.year)
s.CB_month.set(s._date.month)
s._update()
def _next_month(s):
"""更新日历以显示下一个月。"""
s._canvas.place_forget()
s._selection = None
year, month = s._date.year, s._date.month
s._date = s._date + timedelta(
days=calendar.monthrange(year, month)[1] + 1)
s._date = datetime(s._date.year, s._date.month, 1)
s.CB_year.set(s._date.year)
s.CB_month.set(s._date.month)
s._update()
def _update(s, event = None, key = None):
"""刷新界面"""
if key and event.keysym != 'Return': return
year = int(s.CB_year.get())
month = int(s.CB_month.get())
if year == 0 or year > 9999: return
s._canvas.place_forget()
s._date = datetime(year, month, 1)
s._build_calendar() # 重建日历
if year == datetime.now().year and month == datetime.now().month:
day = datetime.now().day
for _item, day_list in enumerate(s._cal.monthdayscalendar(year, month)):
if day in day_list:
item = 'I00' + str(_item + 2)
column = '#' + str(day_list.index(day)+1)
s.master.after(100, lambda :s._pressed(item = item, column = column, widget = s._calendar))
def _exit(s, confirm = False):
"""退出窗口"""
if not confirm: s._selection = None
s.master.destroy()
def _main_judge(s):
"""判断窗口是否在最顶层"""
try:
#s.master 为 TK 窗口
#if not s.master.focus_displayof(): s._exit()
#else: s.master.after(10, s._main_judge)
#s.master 为 toplevel 窗口
if s.master.focus_displayof() == None or 'toplevel' not in str(s.master.focus_displayof()): s._exit()
else: s.master.after(10, s._main_judge)
except:
s.master.after(10, s._main_judge)
#s.master.tk_focusFollowsMouse() # 焦点跟随鼠标
def selection(s):
"""返回表示当前选定日期的日期时间。"""
if not s._selection: return None
year, month = s._date.year, s._date.month
return str(datetime(year, month, int(s._selection[0])))[:10]
def Input_judgment(s, content):
"""输入判断"""
# 如果不加上==""的话，就会发现删不完。总会剩下一个数字
if content.isdigit() or content == "":
return True
else:
return False
if __name__ == '__main__':
root = tk.Tk()
width, height = root.winfo_reqwidth() + 50, 50 #窗口大小
x, y = (root.winfo_screenwidth() - width )/2, (root.winfo_screenheight() - height)/2
root.geometry('%dx%d+%d+%d' % (width, height, x, y )) #窗口位置居中
date_str = tk.StringVar()
date = ttk.Entry(root, textvariable = date_str)
date.place(x = 0, y = 0, relx = 5/20, rely = 1/6, relwidth = 14/20, relheigh = 2/3)
#Calendar((x, y), 'ur').selection() 获取日期，x,y为点坐标
date_str_gain = lambda: [
date_str.set(date)
for date in [Calendar((x, y), 'ur').selection()]
if date]
tk.Button(root, text = '日期:', command = date_str_gain).place(x = 0, y = 0, relx = 1/20, rely = 1/6, relwidth = 4/20, relheigh = 2/3)
root.mainloop() 看完上述内容，你们对怎么在Python中使用tkinter实现一个下拉日历控件有进一步的了解吗？如果还想了解更多知识或者相关内容，请关注创新互联行业资讯频道，感谢大家的支持。
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