我正在构建一个小程序，其中代码的不同部分将在不同时间调用一个对象。我想尝试让它调用前一帧而不是多次复制实际代码。如果您需要一个示例，这是我的代码的一部分：
#Console Menu
class consoleMenu(tk.Frame):
#Initialize
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
#Setups
consoleGuideLabel = ttk.Label(self, text = "Console Guide", font = LARGE_FONT)
consoleItemInfoButton = ttk.Button(self, text = "Console Item Info", command = lambda: controller.show_frame(consoleItemInfo))
consoleVersionButton = ttk.Button(self, text = "Console Version History", command = lambda: popupmsg ("Not supported just yet!"))
consoleMainMenuButton = ttk.Button(self, text = "Main Menu", command = lambda: controller.show_frame(StartPage))
#Placement
consoleGuideLabel.pack(pady = 10, padx = 10)
consoleItemInfoButton.pack()
consoleVersionButton.pack()
consoleMainMenuButton.pack()
现在这是被不同帧多次调用的部分。
#Air - MCPE, PC, Xbox
class mc_air(tk.Frame):
#Initialize
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
#Item Info
text_file = open("minecraft_air.txt", "r")
file = text_file.read()
text_file.close()
#Setups
airLabel = ttk.Label(self, text = "Minecraft - Air - 1", font = LARGE_FONT)
airInfo = ttk.Label(self, text = file, font = NORMAL_FONT)
exitButton = ttk.Button(self, text = "Return to Menu", command = lambda: controller.show_frame(StartPage))
#Placement
airLabel.pack(pady = 10, padx = 10)
airInfo.pack()
exitButton.pack()
它说：
exitButton = ttk.Button(self, text = "Return to Menu", command = lambda: controller.show_frame(StartPage))
我希望能够使用命令替换StartPage以转到上一个窗口。
答案 0 :(得分：0)
这是一种可能的实现，基于我对帧切换的实现here：
import Tkinter as tk
class BaseFrame(tk.Frame):
"""An abstract base class for the frames that sit inside PythonGUI.
Args:
master (tk.Frame): The parent widget.
controller (PythonGUI): The controlling Tk object.
Attributes:
controller (PythonGUI): The controlling Tk object.
"""
def __init__(self, master, controller):
tk.Frame.__init__(self, master)
self.controller = controller
self.grid()
self.create_widgets()
def create_widgets(self):
"""Create the widgets for the frame."""
raise NotImplementedError
def goto_three(self):
self.controller.frames[FrameThree].return_to(self.__class__)
self.controller.show_frame(FrameThree)
class FrameOne(BaseFrame):
"""First page."""
def create_widgets(self):
"""Create the base widgets for the frame."""
self.button_two = tk.Button(self,
anchor=tk.W,
command=lambda: self.controller.show_frame(FrameTwo),
padx=5,
pady=5,
text="Two")
self.button_two.grid(padx=5, pady=5, sticky=tk.W+tk.E)
self.button_three = tk.Button(self,
anchor=tk.W,
command=self.goto_three,
padx=5,
pady=5,
text="Three")
self.button_three.grid(padx=5, pady=5, sticky=tk.W+tk.E)
class FrameTwo(BaseFrame):
"""Second page."""
def create_widgets(self):
"""Create the base widgets for the frame."""
self.button_one = tk.Button(self,
anchor=tk.W,
command=lambda: self.controller.show_frame(FrameOne),
padx=5,
pady=5,
text="One")
self.button_one.grid(padx=5, pady=5, sticky=tk.W+tk.E)
self.button_three = tk.Button(self,
anchor=tk.W,
command=self.goto_three,
padx=5,
pady=5,
text="Three")
self.button_three.grid(padx=5, pady=5, sticky=tk.W+tk.E)
class FrameThree(BaseFrame):
"""Third page."""
def create_widgets(self):
"""Create the base widgets for the frame."""
self.button_two = tk.Button(self,
anchor=tk.W,
command=lambda: self.controller.show_frame(FrameTwo),
padx=5,
pady=5,
text="Two")
self.button_two.grid(padx=5, pady=5, sticky=tk.W+tk.E)
self.button_one = tk.Button(self,
anchor=tk.W,
command=lambda: self.controller.show_frame(FrameOne),
padx=5,
pady=5,
text="One")
self.button_one.grid(padx=5, pady=5, sticky=tk.W+tk.E)
self.button_back = tk.Button(self,
anchor=tk.W,
padx=5,
pady=5,
text="Back")
self.button_back.grid(padx=5, pady=5, sticky=tk.W+tk.E)
def return_to(self, frame):
self.button_back.config(command=lambda: self.controller.show_frame(frame))
class PythonGUI(tk.Tk):
"""The main window of the GUI.
Attributes:
container (tk.Frame): The frame container for the sub-frames.
frames (dict of tk.Frame): The available sub-frames.
"""
def __init__(self):
tk.Tk.__init__(self)
self.title("Python GUI")
self.create_widgets()
self.resizable(0, 0)
def create_widgets(self):
"""Create the widgets for the frame."""
# Frame Container
self.container = tk.Frame(self)
self.container.grid(row=0, column=0, sticky=tk.W+tk.E)
# Frames
self.frames = {}
for f in (FrameOne, FrameTwo, FrameThree): # defined subclasses of BaseFrame
frame = f(self.container, self)
frame.grid(row=2, column=2, sticky=tk.NW+tk.SE)
self.frames[f] = frame
self.show_frame(FrameOne)
def show_frame(self, cls):
"""Show the specified frame.
Args:
cls (tk.Frame): The class of the frame to show.
"""
self.frames[cls].tkraise()
if __name__ == "__main__":
app = PythonGUI()
app.mainloop()
exit()
现在有点hacky，但基本上我的想法是goto_three调用FrameThree实例的return_to，这会改变其command button_back返回到从中调用的帧。