Tkinter multiple frames/'pages': using canvas images - python-3.x

Question

I would like to employ multiple frames in a GUI, where the page switches depending on the button clicked. I know that there's several threads already about this, and I've been looking at this one.
However, for my pages, I need different images on canvasses within each of my frames, so that when I raise a different frame, it comes with a new canvas and a new image on that canvas. I've tried a lot but I don't know how to get it to work so that the canvasses appear with their images.
Here's what I have so far, mostly copying from above link:
import tkinter as tk # python3
TITLE_FONT = ("Helvetica", 18, "bold")
class SampleApp(tk.Tk):
def __init__(self, *args, **kwargs):
tk.Tk.__init__(self, *args, **kwargs)
# 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 = {}
self.frames["StartPage"] = StartPage(parent=container, controller=self)
self.frames["PageOne"] = PageOne(parent=container, controller=self)
self.frames["PageTwo"] = PageTwo(parent=container, controller=self)
self.frames["StartPage"].grid(row=0, column=0, sticky="nsew")
self.frames["PageOne"].grid(row=0, column=0, sticky="nsew")
self.frames["PageTwo"].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
self._canvas = tk.Canvas(parent, bg='white', width=900, height=3517, scrollregion=(0, 2800, 100, 800))
self._photo = tk.PhotoImage(file='images/homegraphic.gif')
self._canvas.create_image(0, 0, image=self._photo, anchor='nw')
label = tk.Label(self, text="This is the start page", font=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=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()
class PageTwo(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
self.controller = controller
label = tk.Label(self, text="This is page 2", font=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()
if __name__ == "__main__":
app = SampleApp()
app.mainloop()
How do I get the canvas image to appear? I've spent a long time trying to figure this out and would appreciate any help!

Answer 1

The problem is here:
self._canvas = tk.Canvas(parent, ...)
Everything within a page needs to be a child of the page or one of its descendants.
It needs to be this:
self._canvas = tk.Canvas(self, ...)