(Tkinter)绑定时自动执行命令,绑定未按预期方式 [英] (Tkinter) Command executed automatically when binding, binding not acting as expected
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问题描述
我正在尝试有条件地将键绑定到命令.但是当我绑定时,该命令会自动执行(当我同时切换两个命令时).为什么会这样呢?以及如何仅绑定命令而不执行它呢?同样,在绑定两个命令之后,仅执行第一个命令(函数p).这是为什么?我的代码如下:
I am trying to bind a key to a command conditionally. But when I bind, the command gets automatically executed (when I toggle both commands). Why does that happen? And how can I only bind a command without executing it? Also after binding both commands, only the first one (function p) is being executed. Why is that? My code is as follows:
from tkinter import *
top = Tk()
editor = Text(top)
editor.pack()
def br(event=None):
try:
editor.insert(INSERT, "<br />")
except:
pass
def ins_br():
br()
return 'break'
def p(event=None):
try:
editor.insert(INSERT, "\n<p></p>")
return 'break'
except:
pass
def br_and_p(event=None):
br()
p()
def enter_key():
if ins_br_var.get() == 1 and p_var.get() == 1:
editor.bind('<Return>', br_and_p())
elif ins_br_var.get() == 1 and p_var.get() == 0:
editor.bind('<Return>', br)
elif ins_br_var.get() == 0 and p_var.get() == 1:
editor.bind('<Return>', p)
else:
editor.unbind('<Return>')
toolbar = Frame(top, bd=1, relief=RAISED)
toolbar.pack(side=TOP, fill=X)
ins_br_var = IntVar()
ins_br_cbox = Checkbutton(toolbar, text="ins_br", variable=ins_br_var, command=enter_key)
ins_br_cbox.pack(side=LEFT, padx=2, pady=2)
p_var = IntVar()
p_cbox = Checkbutton(toolbar, text="p", variable=p_var, command=enter_key)
p_cbox.pack(side=LEFT, padx=2, pady=2)
推荐答案
忽略()
.
执行此操作时:
editor.bind('<Return>', br_and_p())
...您将立即执行函数br_and_ p
,并将该函数的结果绑定到事件.
... You are immediately executing the function br_and_ p
, and binding the result of that function to the event.
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