I am trying to develop a Tkinter GUI which contains two pages, the first one to input stock name (counter_selection) and the second one to plot stock price data. However, when I tried to use the data input from the first class using controller.get_page function it does not return the value input by Entry. The code is as below:
class Application(Tk.Tk):
'''A GUI Application for FCN Demo'''
def __init__(self):
'''Initialization of frame'''
Tk.Tk.__init__(self)
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, counter_selection, plot_counter):
frame = F(container, self)
self.frames[F] = frame
frame.grid(row= 0, column = 0, sticky = "nsew")
self.show_frame(StartPage)
def get_page(self,classname):
'''Returns an instace of page given it's class name as a string'''
for page in self.frames.values():
if str(page.__class__.__name__) == classname:
return page
return None
def show_frame(self,cont):
frame = self.frames[cont]
frame.tkraise()
class counter_selection(Tk.Frame):
def __init__(self, parent, controller):
'''This is to create the widgets to input stock'''
Tk.Frame.__init__(self,parent)
self.controller = controller
label1 = Tk.Label(self, text = "Please Enter 3 counter names")
label1.pack(padx = 10, pady = 10)
self.entry1 = Tk.Entry(self)
self.entry1.pack()
self.entry2 = Tk.Entry(self)
self.entry2.pack()
self.entry3 = Tk.Entry(self)
self.entry3.pack()
button1 = Tk.Button (self, text = 'Confirm', command = lambda: controller.show_frame(plot_counter))
button1.pack()
class plot_counter(Tk.Frame):
'''This is to plot the graph of three selected counters'''
def __init__(self,parent,controller):
Tk.Frame.__init__(self,parent)
self.controller = controller
counterPage = self.controller.get_page('counter_selection')
self.counter1 = counterPage.entry1.get()
self.counter2 = counterPage.entry2.get()
self.counter3 = counterPage.entry3.get()
label1 = Tk.Label(self, text = self.counter11)
label1.pack()
The label1 does not show anything on the Frame, suggesting that it seems failed to get the value from the class. What's my mistake?
(PS: I didn't put the StartPage in since it is irrelevant for the question)
