python - 如何创建一个 GUI 来添加两个不同复选框中的两个数字？

Question

from tkinter import *
from ProjectHeader import *

def sel1():
    return 1

def sel2():
    return 2

def sel3():
    return 3

def sel4():
    return 4

def sel():

      selection = "THe answer is: " + str(sel2() + sel3())
      label.config(text = selection)

top = Tk()
var = IntVar()

CheckVar1 = sel1()
CheckVar2 = sel2()
CheckVar3 = sel3()
CheckVar4 = sel4()

C1 = Checkbutton(top, text = "Option1", variable = CheckVar1)
C2 = Checkbutton(top, text = "Option2", variable = CheckVar2)
C3 = Checkbutton(top, text = "Option3", variable = CheckVar3)
C4 = Checkbutton(top, text = "Option4", variable = CheckVar4)

B = Button(top, text ="ADD", command=sel)

B.pack()

C1.pack()
C2.pack()
C3.pack()
C4.pack()

label = Label(top)
label.pack()


top.mainloop()

正如标题所说，如何创建一个 GUI 来添加两个不同复选框中的两个数字？

例如，当我同时选中选项2和选项3时，程序将获取sel2()和sel3()中的值并进行加法

我尝试用几种方法来做到这一点，但我不明白如何使复选框为真/在选中该框时被选中，结果即使框不存在，代码也会显示答案已检查

谢谢

Answer 1

如果我理解正确的话，这是您的程序的简化版本，应该可以回答您的问题:

from Tkinter import *

gui = Tk()

#create variables to store check state
checked1 = IntVar()
checked2 = IntVar()
#create values for the two boxes
cb1 = 5
cb2 = 10

#create a callback for our button
def callback():
    print(checked1.get()*cb1+checked2.get()*cb2)

c1 = Checkbutton(gui, text='b1', variable=checked1)
c2 = Checkbutton(gui, text='b2', variable=checked2)
b1 = Button(gui, text="ADD", command=callback)

c1.pack()
c2.pack()
b1.pack()

gui.mainloop()

您的程序已达到一定程度的复杂性，将您的 gui 重组为一个类将是有益的。阅读Tkinter documentation如果您想要如何执行此操作的示例。以下是将 GUI 作为自定义类的示例:

from Tkinter import *

class Gui(object):
    def __init__(self, parent):
        self.top = parent

        self.checked1 = IntVar()
        self.checked2 = IntVar()

        self.c1_value = 1
        self.c2_value = 2

        self.c1 = Checkbutton(self.top, text='b1', variable=self.checked1)
        self.c2 = Checkbutton(self.top, text='b2', variable=self.checked2)
        self.b1 = Button(self.top, text="ADD", command=self.callback)
        self.l1 = Label(self.top)

        self.c1.pack()
        self.c2.pack()
        self.b1.pack()
        self.l1.pack()

    def callback(self):
        value = self.c1_value*self.checked1.get() + self.c2_value*self.checked2.get()
        self.l1.config(text=str(value))

root = Tk()

my_window = Gui(root)

root.mainloop()