Question

如果我试图把信封放在一个拖车窗上,而该法典没有任何其他内容:

from tkinter import ttk
from tkinter import *
from tkinter.ttk import *
class Application(Frame):
    def createWidgets(self):
        self.can = Canvas(self.master, width=500, height=250)
        self.can.grid(row=2, column=1)
        self.can.create_line(0,0,500,200)
    def __init__(self, master=None):
        Frame.__init__(self, master)
        self.pack()
        self.createWidgets()
root = Tk()
app = Application(master=root)
app.mainloop()
root.destroy()

a 从未创造过窗户。我发现,增加一个顿子,以创建信道:

from tkinter import ttk
from tkinter import *
from tkinter.ttk import *
class Application(Frame):
    def makecanvas(self):
        self.grid_forget()
        self.can = Canvas(self.master, width=500, height=250)
        self.can.grid(row=2, column=1)
        self.can.create_line(0,0,500,200)
    def createWidgets(self):
        self.inst = Button(self)
        self.inst["text"] = "GO!"
        self.inst["command"] =  self.makecanvas           
        self.inst.grid(row=3, column=1, pady=15, sticky=N)
    def __init__(self, master=None):
        Frame.__init__(self, master)
        self.pack()
        self.createWidgets()
root = Tk()
app = Application(master=root)
app.mainloop()
root.destroy()

Also, If I comment out the create canvas function, the button I removed with self.grid_forget() doesn t disappear. Is there a better way to do this?

Answer 1

问题是,你把地貌管理者混为一谈。你们只能使用某个母子的植被。你可以在整个申请中使用,但你正在使用双亲的植被。

你们需要改写自己的法典,只使用电网,或者只使用包装,直接使用根窗户的所有植被。

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from tkinter import ttk
from tkinter import *
from tkinter.ttk import *


class Application(Frame):
    def __init__(self, master=None):
        Frame.__init__(self, master)
        self.grid()      
        self.createWidgets()

    def createWidgets(self):
        self.can = Canvas(self.master, width=500, height=250)
        self.can.grid(row=2, column=1)
        self.can.create_line(0,0,500,200)

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

<><><>>> > 采用><>>>> 代码>><>>>>>>> >> ><>><>>>> > >> > > >> ><><>>>>>> >>>> >> >>> > ><>>>>>>>>>>>>>>>>>> >>>>>>>><>>><>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><>>>>>>>>

from tkinter import ttk
from tkinter import *
from tkinter.ttk import *


class Application(Frame):
    def __init__(self, master=None):
        Frame.__init__(self, master)
        self.pack()
        self.createWidgets()

    def createWidgets(self):
        self.can = Canvas(self.master, width=500, height=250)
        self.can.pack()
        self.can.create_line(0,0,500,200)

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

友情链接