如果标题有点宽泛,请道歉。
我正在创建一个包含多个页面的Tkinter应用程序,我正在使用this段代码来执行此操作。
每个页面都是一个框架,通过调用“show_frame”函数来提升框架。使用按钮在页面之间切换没有问题,但是如果满足条件,我想运行某个功能并更改页面。
以下是一个例子:
class SampleApp(tk.Tk):
def __init__(self, *args, **kwargs):
tk.Tk.__init__(self, *args, **kwargs)
self.title_font = tkfont.Font(family='Helvetica', size=18, weight="bold", slant="italic")
# the container is where we'll stack a bunch of frames
# on top of each other, then the one we want visible
# will be raised above the others
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, PageOne, PageTwo):
page_name = F.__name__
frame = F(parent=container, controller=self)
self.frames[page_name] = frame
# put all of the pages in the same location;
# the one on the top of the stacking order
# will be the one that is visible.
frame.grid(row=0, column=0, sticky="nsew")
self.show_frame("StartPage")
def show_frame(self, page_name):
'''Show a frame for the given page name'''
frame = self.frames[page_name]
frame.tkraise()
class StartPage(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
self.controller = controller
label = tk.Label(self, text="This is the start page", font=controller.title_font)
label.pack(side="top", fill="x", pady=10)
button1 = tk.Button(self, text="Go to Page One",
command=lambda: controller.show_frame("PageOne"))
button2 = tk.Button(self, text="Go to Page Two",
command=lambda: controller.show_frame("PageTwo"))
button1.pack()
button2.pack()
class PageOne(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
self.controller = controller
label = tk.Label(self, text="This is page 1", font=controller.title_font)
label.pack(side="top", fill="x", pady=10)
button = tk.Button(self, text="Go to the start page",
command=lambda: controller.show_frame("StartPage"))
button.pack()
def doSomething():
...
if x == y:
"RAISE PAGE ONE"
if __name__ == "__main__":
app = SampleApp()
app.mainloop()
如您所见,doSomething函数不在任何类中。我如何从这个功能中提升PageOne。
答案 0 :(得分:0)
最简单的答案是使 doSomething ()成为 SampleApp 的方法。然后,您可以访问方法 show_frame 。但是,你的问题似乎暗示这不是一种选择。
如果不这样做,我建议将 app 传递给该函数,然后调用 app.show_frame(“PageName”)。
如果您不想将指向 app 的指针作为参数传递,那么您可以传递 doSomething 函数 app.show_frame as foo ,然后在希望显示页面时调用 foo (“PageName”)。
E.g。
def doSomething(foo):
'''some code'''
foo("page name")
doSomething(app.show_frame)