我正在开发一个程序,希望用户选择他们的兴趣,完成后按提交。如果至少选中一个按钮,我如何只允许用户按提交。
from tkinter import *
check = Tk()
check.title("Interests")
CheckVar1 = IntVar()
CheckVar2 = IntVar()
CheckVar3 = IntVar()
CheckVar4 = IntVar()
CheckVar5 = IntVar()
C1 = Checkbutton(check, text = "Horror", variable = CheckVar1, \
onvalue = 1, offvalue = 0, height=1, \
width = 20)
C2 = Checkbutton(check, text = "Action", variable = CheckVar2, \
onvalue = 1, offvalue = 0, height=1, \
width = 20)
C3 = Checkbutton(check, text = "Documentary", variable = CheckVar3, \
onvalue = 1, offvalue = 0, height=1, \
width = 20)
C4 = Checkbutton(check, text = "Science fiction", variable = CheckVar4, \
onvalue = 1, offvalue = 0, height=1, \
width = 20)
C5 = Checkbutton(check, text = "Comedy", variable = CheckVar5, \
onvalue = 1, offvalue = 0, height=1, \
width = 20)
submit_btn = Button(check, text = "Submit", command = lambda: check.destroy())
C1.pack()
C2.pack()
C3.pack()
C4.pack()
C5.pack()
submit_btn.pack()
check.mainloop()
if CheckVar1.get():
#dosomething
if CheckVar2.get():
#dosomething
if CheckVar3.get():
#dosomething
if CheckVar4.get():
#dosomething
if CheckVar5.get():
#dosomething
最佳答案
您需要添加一个处理函数,在销毁窗口之前检查是否至少选中了一个框。
您可以使用以下逻辑轻松完成此操作:
from tkinter import *
from tkinter import messagebox
check = Tk()
check.title("Interests")
CheckVar1 = BooleanVar()
CheckVar2 = BooleanVar()
CheckVar3 = BooleanVar()
CheckVar4 = BooleanVar()
CheckVar5 = BooleanVar()
C1 = Checkbutton(check, text = "Horror", variable = CheckVar1, \
onvalue = 1, offvalue = 0, height=1, \
width = 20)
C2 = Checkbutton(check, text = "Action", variable = CheckVar2, \
onvalue = 1, offvalue = 0, height=1, \
width = 20)
C3 = Checkbutton(check, text = "Documentary", variable = CheckVar3, \
onvalue = 1, offvalue = 0, height=1, \
width = 20)
C4 = Checkbutton(check, text = "Science fiction", variable = CheckVar4, \
onvalue = 1, offvalue = 0, height=1, \
width = 20)
C5 = Checkbutton(check, text = "Comedy", variable = CheckVar5, \
onvalue = 1, offvalue = 0, height=1, \
width = 20)
def submitHandle():
anyChecked = CheckVar1.get() | CheckVar2.get() | CheckVar3.get(
) | CheckVar4.get() | CheckVar5.get()
if anyChecked:
check.destroy()
else:
messagebox.showerror("Error", "Please check at least one.")
submit_btn = Button(check, text="Submit", command=lambda: submitHandle())
C1.pack()
C2.pack()
C3.pack()
C4.pack()
C5.pack()
submit_btn.pack()
check.mainloop()
附注请注意,您应该使用 BooleanVar
而不是 IntVar
作为开关复选框。另外,请考虑adding a check窗口关闭时。
关于python - 如何强制用户选择至少一个复选按钮,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/45711321/