如何启用和禁用框架而不是Python Tkinter中的单个小部件

Question

I have an application where I have to enable all the widgets on current window after I click on a radio button. Initially, when I start my application, I have two radio buttons in frame1 and I have to disable all other widgets (like buttons, entries) which are placed in frame2 , and whenever I click on radio_button1 it all the widgets should be enabled. In this code, when I click on radio_button1 , it activates all widgets. Is there a better approach I can develop, so that it disables and enables the whole frame instead of enabling and disabling each individual widget? Below is my current code:

from tkinter import *
from tkinter import simpledialog

class Gui:
    def __init__(self, parent, **kw):
        self.parent = parent
        self.top = Toplevel(self.parent)
        self.frame1= Frame(self.top,width= 450,height =550)
        self.frame1.grid(row=0)
        self.frame2 = Frame(self.top, width=450, height=550)
        self.frame2.grid(row=1)
        self.radio1=Radiobutton(self.frame1,text='radio_button1',value=1,command=self.enable_window)
        self.radio2=Radiobutton(self.frame1,text='radio_button2',value=2)


        self.label1 = Label(self.frame2, text='Label1:', width=15, background='white', justify=CENTER,
                                  font='-weight bold')
        self.label2 = Label(self.frame2, text='Lable2:', width=15, background='white', justify=CENTER,
                               font='-weight bold')
        self.b=Button(self.frame2,text='save',state=DISABLED)
        self.c = Button(self.frame2, text='cancel',state=DISABLED)
        self.radio1.grid(row=0,column=0,sticky='W')
        self.radio2.grid(row=0,column=1,padx=50,sticky='W')
        self.label1.grid(padx=10, pady=5, row=0, column=0, sticky='E')
        self.label2.grid(padx=10, pady=5, row=1, column=0, sticky='E')
        self.b.grid(row=3,column=0)
        self.c.grid(row=3, column=1)
        self.entry1_Var = StringVar()
        self.entry2_Var = StringVar()
        self.entry1 = Entry(self.frame2, width=15, background='white', textvariable=self.entry1_Var,state='disable',
                                   font='-weight bold')
        self.entry2 = Entry(self.frame2, width=15, background='white', textvariable=self.entry2_Var,state='disable',
                                font='-weight bold')

        self.entry1.grid(padx=10, pady=5, row=0, column=1, sticky='W')
        self.entry2.grid(padx=10, pady=5, row=1, column=1, sticky='W')


       self.entry_focus_flag = False
       self.top.grab_set()
    def enable_window(self):
        self.entry1['state'] = 'normal'
        self.entry2['state'] = 'normal'
        self.b['state'] = NORMAL
        self.b['state'] = NORMAL

class main_window:
    def __init__(self,root):
        self.root=root
        button1=Button(self.root,text='Start application',command= lambda p=self.root:self.callback(p))
        button1.pack()
    def callback(self,p):
        Gui(p)

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

Answer 1

What you should do is to recursively visit all the children of the frame (and the children of its children and so on if (like me) you use nested frames to organize your UI), and disable or enable each individually.

The best way to do that is to subclass ttk.Frame to include the required functionality:

class dFrame(ttk.Frame):

    def enable(self, state='!disabled'):

        def cstate(widget):
            # Is this widget a container?
            if widget.winfo_children:
                # It's a container, so iterate through its children
                for w in widget.winfo_children():
                    # change its state
                    w.state((state,))
                    # and then recurse to process ITS children
                    cstate(w)

        cstate(self)


    def disable(self):
        self.enable('disabled')

Then create your frames as instances of dFrame:

self.frame1 = dFrame(self.top,width= 450,height =550)

and you can use:

self.frame1.enable()

and

self.frame1.disable()

to enable / disable all widgets in the frame.