本文介绍了Python 如何在编写时更新组合框值?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
限时送ChatGPT账号..我想要在编辑组合框上部文本字段上的文本时更新一个值列表,但我没有找到访问该文本字段值的选项.
I want to have a list of values that is updated when I edit the text on the upper text field of the ComboBox, but I have found no option to access the value of this text field.
我想出了一种荒谬的解决方案,包括在 ComboBox 标题上盖章的输入框,这样我就可以编辑输入框并绑定它以获取其值以更新 ComboBox.
I came up with a kind of ridiculous solution, consisting in an Entry Box stamped over the ComboBox header, so I can edit the Entry Box and bind it to get its value to update the ComboBox.
我怎样才能做得更好?
import tkinter as tk
from tkinter import ttk
def Run(size=(300,100)):
a_set=('one','two','three')
master = tk.Tk()
master.geometry(str(size[0])+'x'+str(size[1]))
lista=tk.ttk.Combobox(master,width=22,values=a_set)
lista.grid(row=0,column=0)
def update(event):
a=event.widget.get()
newvalues=[i for i in a_set if a in i]
lista['values']=newvalues
entry=tk.Entry(master)
entry.bind('<KeyRelease>',update)
entry.grid(row=0,column=0)
master.mainloop()
Run()
推荐答案
您可以使用 combobox
的 textvariable 选项.
You can use the textvariable option of the combobox
.
import tkinter as tk
from tkinter import ttk
def update(*args):
newvalues=[i for i in a_set if var.get() in i]
lista['values']=newvalues
a_set=('one','two','three')
master = tk.Tk()
var = tk.StringVar()
var.trace('w', update)
lista = ttk.Combobox(master, width=22, textvariable=var)
lista.grid(row=0,column=0)
master.mainloop()
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