Question

我想在一个屏幕中有一个可重用的框架，其中包含小部件（稍后我将在另一个屏幕中重用该框架）。该框架将是屏幕的一部分，还将有其他小部件。

我尝试为可重用框架创建一个类（类FrameBovenverdieping（tk.Frame）:），该类应显示在ViewBezettingBoven屏幕中。但是，FrameBovenverdieping显示在每个屏幕中，也显示在StartPage和PageTwo中。我只想在ViewBezettingBoven中拥有它。

此外，当我使用ViewBezettingBoven时，切换屏幕的按钮不再起作用

import tkinter as tk

PLATTEGROND_BOVEN_WIDTH = 1000
PLATTEGROND_BOVEN_HEIGHT = 720
PLATTEGROND_BENEDEN_WIDTH = 1000
PLATTEGROND_BENEDEN_HEIGHT = 720


class BezettingApp(tk.Tk):

    def __init__(self, *args, **kwargs):

        tk.Tk.__init__(self, *args, **kwargs)

        self.geometry("{0}x{1}+0+0".format(self.winfo_screenwidth(), self.winfo_screenheight()))
        self.bind("<Escape>", lambda e: e.widget.quit())

        container = tk.Frame(self)      
        container.pack(side="top", fill="both", expand = True)
        container.grid_rowconfigure(0, weight=1)
        container.grid_columnconfigure(0, weight=1)

        self.frames = {}

        for F in (StartPage, ViewBezettingBoven, PageTwo):

            frame = F(container, self)

            self.frames[F] = frame

            frame.grid(row=0, column=0, sticky="nsew")

        self.show_frame(StartPage)

    def show_frame(self, cont):

        frame = self.frames[cont]
        frame.tkraise()


class StartPage(tk.Frame):

    def __init__(self, parent, controller):
        tk.Frame.__init__(self,parent)
        label = tk.Label(self, text="Start Page")
        label.pack(pady=10,padx=10)


        button = tk.Button(self, text="Visit Page 1",
                        command=lambda: controller.show_frame(ViewBezettingBoven))
        button.pack()

        button2 = tk.Button(self, text="Visit Page 2",
                        command=lambda: controller.show_frame(PageTwo))
        button2.pack()


class ViewBezettingBoven(tk.Frame):

    def __init__(self, parent, controller):
        tk.Frame.__init__(self, parent)

        label = tk.Label(self, text="Page One!!!")
        self.parent = parent
        self.window = FrameBovenverdieping(self)


        label.pack(pady=10,padx=10)
        self.widgets()

    def widgets(self):

        button1 = tk.Button(self, text="Back to Home",
                        command=lambda: controller.show_frame(StartPage))
        button1.pack()

        button2 = tk.Button(self, text="Page Two",
                        command=lambda: controller.show_frame(PageTwo))
       button2.pack()

class FrameBovenverdieping(tk.Frame):

    def __init__(self, parent):
        tk.Frame.__init__(self, parent)
        self.parent = parent
        self.widgets()

    def widgets(self):
        photo = tk.PhotoImage(file='autplacement.png')
        w = PLATTEGROND_BENEDEN_WIDTH
        h = PLATTEGROND_BENEDEN_HEIGHT
        imagelabel = tk.Label(image=photo)
        imagelabel.image = photo
        imagelabel.pack()

class PageTwo(tk.Frame):

    def __init__(self, parent, controller):
        tk.Frame.__init__(self, parent)
        label = tk.Label(self, text="Page Two!!!")
        label.pack(pady=10,padx=10)

        button1 = tk.Button(self, text="Back to Home",
                        command=lambda: controller.show_frame(StartPage))
        button1.pack()

        button2 = tk.Button(self, text="Page One",
                        command=lambda: controller.show_frame(ViewBezettingBoven))
        button2.pack()



app = BezettingApp()
app.mainloop()

输出：

Exception in Tkinter callback
Traceback (most recent call last):
  File "C:\Users\Lonneke Kolkman\AppData\Local\Programs\Python\Python37\lib\tkinter\__init__.py", line 1705, in __call__
    return self.func(*args)
  File "C:\Users\Lonneke Kolkman\Google Drive\Assortimens\BezettingAppPy\bezettingapp.py", line 74, in <lambda>
    command=lambda: controller.show_frame(StartPage))
NameError: name 'controller' is not defined
Exception in Tkinter callback
Traceback (most recent call last):
  File "C:\Users\Lonneke Kolkman\AppData\Local\Programs\Python\Python37\lib\tkinter\__init__.py", line 1705, in __call__
    return self.func(*args)
  File "C:\Users\Lonneke Kolkman\Google Drive\Assortimens\BezettingAppPy\bezettingapp.py", line 78, in <lambda>
    command=lambda: controller.show_frame(PageTwo))
NameError: name 'controller' is not defined
>>>

程序运行，但是尽管我只希望它在ViewBezettingBoven中显示，但在每个页面中都显示可重复使用的框架。

Answer 1

您的控制器变量超出范围。如果您将控制器发送给该函数，则我可以运行代码而不会出错：

class ViewBezettingBoven(tk.Frame):

    def __init__(self, parent, controller):
        tk.Frame.__init__(self, parent)

        label = tk.Label(self, text="Page One!!!")
        self.parent = parent
        self.window = FrameBovenverdieping(self)


        label.pack(pady=10,padx=10)
        #send controller to function
        self.widgets(controller)

    def widgets(self,controller):

        button1 = tk.Button(self, text="Back to Home",
                        command=lambda: controller.show_frame(StartPage))
        button1.pack()

        button2 = tk.Button(self, text="Page Two",
                        command=lambda: controller.show_frame(PageTwo))
        button2.pack()

如何在tkinter中使用可重用的框架类？

1 个答案: