As you can see in the picture I want the canvas scrollbar to go all the way right... In a few words I want the canvas to cover all the red bg that the frame 2 has... Any ideas? Here is the code: (reference to the code bellow about the scrollbar code you will find

Also It would be helpfull if you guys could tell me how to make the scrollbar move with the mouse wheel

CodePudding user response：

Next time please add a complete reproducible example including the imports and mainloop so it is easier to follow.

Make your canvas scrollable

(source: tkinter: binding mousewheel to scrollbar):

# bind scrolling to mousewheel
def _scroll_canvas(event):
    canvas.yview_scroll(-1*(int(event.delta/100)), "units")
canvas.bind_all("<MouseWheel>", _scroll_canvas)

Stick your scrollbar on the right side

1. You dont need another frame just for the Canvas, i removed your container Frame and put the Canvas directly into your midFrame. The red background can be removed also.
2. Same goes for your scrollbar - put directly into your midFrame
3. For the red portion i created a new sub-frame called red_frame (at the bottom)
4. If you want the scrollbar to appear on the right side of the screen, use pack with the "right" option, and for all other sub-frames use the "left" option. Everything else is managed by the order in which you pack the widgets.

Full code:

from tkinter import Frame, Canvas, Scrollbar, Tk, Label

window = Tk()

upFrame = Frame(window, bg='lightgray')
upFrame.grid(row=1, column=0, sticky='nesw')
midFrame = Frame(window, bg='red')
midFrame.grid(row=2, column=0, sticky='nesw')
bottomFrame = Frame(window, bg='lightgray')
bottomFrame.grid(row=3, column=0, sticky='nesw')
    
    
window.grid_rowconfigure(1, weight = 0)
window.grid_columnconfigure(0, weight = 1)
window.grid_rowconfigure(1, weight = 0)

canvas = Canvas(midFrame)
scrollbar = Scrollbar(midFrame, orient="vertical", command=canvas.yview)
scrollable_frame = Frame(canvas)

scrollable_frame.bind(
    "<Configure>",
     lambda e: canvas.configure(
      scrollregion=canvas.bbox("all")
     )
  )
    
canvas.create_window((0, 0), window=scrollable_frame, anchor="nw")

canvas.configure(yscrollcommand=scrollbar.set)

# bind scrolling to mousewheel
def _scroll_canvas(event):
    canvas.yview_scroll(-1*(int(event.delta/100)), "units")
canvas.bind_all("<MouseWheel>", _scroll_canvas)
    
for i in range(50):
    Label(scrollable_frame, text="Sample scrolling label").pack()

# here you decide in which order your widgets appear: canvas, red frame and on the right - your scrollbar
canvas.pack(side='left', fill='both')
red_frame = Frame(midFrame, bg="red")
red_frame.pack(side="left")
scrollbar.pack(side="right", fill="y")

window.mainloop()