Python Tkinter组合框 [英] Python tkinter Combobox
问题描述
当我单击组合框的名称时不填写检查之类的按钮以显示值时,我想填写我的条目。我该怎么办?
I want to fill my entries when I click in a name of my Combobox without buttons like 'check' to show the values. How can i do that?
import tkinter as tk
from tkinter import ttk
import csv
root = tk.Tk()
cb = ttk.Combobox(root,state='readonly')
labName = ttk.Label(root,text='Names: ')
labTel = ttk.Label(root,text='TelNum:')
labCity = ttk.Label(root,text='City: ')
entTel = ttk.Entry(root,state='readonly')
entCity = ttk.Entry(root,state='readonly')
with open('file.csv','r',newline='') as file:
reader = csv.reader(file,delimiter='\t')
cb.grid(row=0,column=1)
labName.grid(row=0,column=0)
labTel.grid(row=1,column=0)
entTel.grid(row=1,column=1)
labCity.grid(row=2,column=0)
entCity.grid(row=2,column=1)
推荐答案
您可以使用 bind()
执行函数 on_select
在列表上选择元素时。
You can use bind()
to execute function on_select
when you select element on list.
cb.bind('<<ComboboxSelected>>', on_select)
,在此功能中,您可以填写条目
。
and in this function you can fill Entry
.
来自GitHub的旧示例: combobox-get-selection
Old example from GitHub: combobox-get-selection
#!/usr/bin/env python3
import tkinter as tk
import tkinter.ttk as ttk
# --- functions ---
def on_select(event=None):
print('----------------------------')
if event: # <-- this works only with bind because `command=` doesn't send event
print("event.widget:", event.widget.get())
for i, x in enumerate(all_comboboxes):
print("all_comboboxes[%d]: %s" % (i, x.get()))
# --- main ---
root = tk.Tk()
all_comboboxes = []
cb = ttk.Combobox(root, values=("1", "2", "3", "4", "5"))
cb.set("1")
cb.pack()
cb.bind('<<ComboboxSelected>>', on_select)
all_comboboxes.append(cb)
cb = ttk.Combobox(root, values=("A", "B", "C", "D", "E"))
cb.set("A")
cb.pack()
cb.bind('<<ComboboxSelected>>', on_select)
all_comboboxes.append(cb)
b = tk.Button(root, text="Show all selections", command=on_select)
b.pack()
root.mainloop()
编辑:
行如果事件:<
on_select
中的/ code>仅在使用 bind()
时有效,因为它执行带有事件信息的功能。 command =
执行不带参数的函数,然后设置 even = None
和 if事件:
始终为 False
。
Line if event:
in on_select
works only when you use bind()
because it executes function with information about event. command=
executes function without arguments and then it sets even=None
and then if event:
is always False
.
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