0

这段代码是我项目的一部分，我必须管理 50 名（或更多）学生的出勤率。

我想要的是所有复选框最初都应该被“选中” （显示当前状态），当我取消选中随机复选框（以标记不存在）并单击Submit按钮（尚未在窗口底部创建）时，我应该得到一个列表，其中“输入日期”作为第一个元素，卷号即 2018-MC-XX 作为其他元素。

例如： ['01/08/2020', '2018-MC-7', '2018-MC-11', '2018-MC-23', '2018-MC-44']

实际上我的计划是当我得到一个列表时，我会很容易地把它写到一个文本文件中。此外，如果有另一种方法可以创建多个可滚动复选框而不将它们打包在画布中，那么请告诉！

from tkinter import *
from tkcalendar import DateEntry

root = Tk()
root.geometry('920x600+270+50')
root.minsize(920,600)

Attendance_frame = Frame(root)    ### Consider it a Main Frame
Attendance_frame.pack()

attendaceBox = LabelFrame(Attendance_frame, text = 'Take Attendance', bd = 4, relief = GROOVE, labelanchor = 'n',font = 'Arial 10 bold', fg = 'navy blue', width = 850, height = 525)     # A Label Frame inside the main frame

attendaceBox.pack_propagate(0)
attendaceBox.pack(pady = 15)

dateFrame = Frame(attendaceBox)    # A small frame to accommodate date entry label & entry box
dateFrame.pack(anchor = 'w')

font = 'TkDefaultFont 10 bold'
date_label = Label(dateFrame, text = 'Enter Date : ', font = font).grid(row = 0, column =  0, sticky = 'w', padx = 10, pady = 10)

date_entry = DateEntry(dateFrame, date_pattern = 'dd/mm/yyyy', showweeknumbers = FALSE, showothermonthdays = FALSE)
date_entry.grid(row = 0, column = 1, sticky = 'w')

noteLabel = Label(attendaceBox, text = 'Note: Uncheck the boxes for absentees').pack(anchor = 'w', padx = 10, pady = 5)

canvas = Canvas(attendaceBox, borderwidth=0, background="#ffffff")
checkFrame = Frame(canvas, width = 100, height = 50)
vsb = Scrollbar(canvas, orient="vertical", command=canvas.yview)
canvas.configure(yscrollcommand=vsb.set)

vsb.pack(side="right", fill="y")
canvas.pack(side="left", fill="both", expand=True)
canvas.pack_propagate(0)
canvas.create_window((4,4), window=checkFrame, anchor="nw")

def onFrameConfigure(canvas):
    '''Reset the scroll region to encompass the inner frame'''
    canvas.configure(scrollregion=canvas.bbox("all"))

checkFrame.bind("<Configure>", lambda event, canvas=canvas: onFrameConfigure(canvas))

for i in range(0,51):     # A loop to create Labels of students roll numbers & names
    c = Checkbutton(checkFrame, text = f"{'2018-MC-'+str(i+1)}       Student {i+1}")
    c.grid(row = i, column = 0, padx = 10, sticky = 'w')


mainloop()
4

1 回答 1

2

首先，您需要StringVar为每个 Checkbutton 获取后者的状态Checkbuttons。然后您可以使用列表来保存它们，StringVars以便您以后可以访问它们。您可以将 的 设置为onvalue与checkbuttons它们关联的卷号。

您也可以使用Text小部件而不是Canvas+ Frame。下面是一个例子：

import tkinter as tk

root = tk.Tk()

frame = tk.Frame(root)
frame.pack()

text = tk.Text(frame, width=40, height=20)
text.pack(side=tk.LEFT, fill=tk.BOTH)

vars = []
for i in range(51):
    rollnum = '2018-MC-'+str(i+1)
    var = tk.StringVar(value=rollnum)
    cb = tk.Checkbutton(text, text=rollnum, variable=var, onvalue=rollnum, offvalue='', bg='white')
    text.window_create('end', window=cb)
    text.insert('end', '\n')
    vars.append(var)

vsb = tk.Scrollbar(frame, orient=tk.VERTICAL, command=text.yview)
vsb.pack(side=tk.RIGHT, fill=tk.Y)

text.config(yscrollcommand=vsb.set)

def submit():
    # extract roll numbers for checked checkbuttons
    result = [var.get() for var in vars if var.get()]
    print(result)

tk.Button(root, text='Submit', command=submit).pack()

root.mainloop()
于 2020-08-03T07:04:51.633 回答