如何使窗口状态空闲直到在python tkinter中按下按钮？

Question

我有一个带有开始按钮的窗口，并在不同的框架中设置了一些小部件。现在，我想使窗口处于空闲状态（禁用状态），直到单击“开始”按钮。帮助我解决此问题。我的代码如下

from tkinter import *



class Application(Frame):

def __init__(self,  master):
    super(Application,self).__init__(master)
    self.grid()
    self.create_widgets()

  def create_widgets(self):
    self.be=Button(self,text="start")
    self.be.grid(row=1,column=1,sticky="s")

    self.columnconfigure(0, pad=3)
    self.columnconfigure(1, pad=3)
    self.columnconfigure(2, pad=3)
    self.columnconfigure(3, pad=3)

    self.rowconfigure(0, pad=5)
    self.rowconfigure(1, pad=5)
    self.f3=Frame(self)
    self.f3.grid(row=2,column=1)
    fuel = Button(self.f3, text="Button",width=19)
    fuel.grid(row=1, column=0)
    Temp = Button(self.f3, text="Button",width=19)
    Temp.grid(row=1, column=1)
    Th = Button(self.f3,text="Button",width=19)
    Th.grid(row=1, column=2)    
    Eo = Button(self.f3, text="Button",width=19)
    Eo.grid(row=1, column=3)

    Bh = Button(self.f3, text="Button",width=19)
    Bh.grid(row=2, column=0)        
    Abs = Button(self.f3, text="Button",width=19)
    Abs.grid(row=2, column=1)         
    sp = Button(self.f3, text="Button",width=19)
    sp.grid(row=2, column=2) 
    fo = Button(self.f3, text="Button",width=19)
    fo.grid(row=2, column=3) 

root= Tk()
app=Application(root)
app.mainloop()

Answer 1

您宁愿循环遍历小部件并逐个禁用它们，因为不能像这样那样禁用整个Frame对象。

因此，您将需要使用winfo_children()来探测子窗口小部件。

然后，您将需要使用command回调将方法添加到self.be按钮，以再次启用子小部件。

完整程序

这是您要寻找的程序：

'''
Created on Apr 29, 2016

@author: billal begueradj
'''
from tkinter import *

class Application(Frame):

   def __init__(self,  master):
       super(Application,self).__init__(master)
       self.grid()
       self.create_widgets()

   def create_widgets(self):
       self.be=Button(self,text="start", command = self.enable_widgets)
       self.be.grid(row=1,column=1,sticky="s")

       self.columnconfigure(0, pad=3)
       self.columnconfigure(1, pad=3)
       self.columnconfigure(2, pad=3)
       self.columnconfigure(3, pad=3)

       self.rowconfigure(0, pad=5)
       self.rowconfigure(1, pad=5)
       self.f3=Frame(self)
       self.f3.grid(row=2,column=1)
       fuel = Button(self.f3, text="Button",width=19)
       fuel.grid(row=1, column=0)
       Temp = Button(self.f3, text="Button",width=19)
       Temp.grid(row=1, column=1)
       Th = Button(self.f3,text="Button",width=19)
       Th.grid(row=1, column=2)    
       Eo = Button(self.f3, text="Button",width=19)
       Eo.grid(row=1, column=3)

       Bh = Button(self.f3, text="Button",width=19)
       Bh.grid(row=2, column=0)        
       Abs = Button(self.f3, text="Button",width=19)
       Abs.grid(row=2, column=1)         
       sp = Button(self.f3, text="Button",width=19)
       sp.grid(row=2, column=2) 
       fo = Button(self.f3, text="Button",width=19)
       fo.grid(row=2, column=3) 
       for child in self.f3.winfo_children():
           child.configure(state = 'disable')


   def enable_widgets(self):
       '''Enable the child widgets'''
       for child in self.f3.winfo_children():
           child.configure(state = 'normal')


root= Tk()
app=Application(root)
app.mainloop()

演示

在程序开始时，GUI将如下所示：

单击Start按钮后：