How to fully change the background color on a tkinter.ttk Treeview

Question

I have been attempting to make a directory browser for a recent project of mine that I'm developing in python 3.4.4 with tkinter. I do not want the background to be the default color, so I have gone about changing the background of most widgets. I didn't have any trouble until I got to the Treeview. I'm not too good with ttk.Style(), but I still managed to get ``` ttk.Style().configure("Treeview", background="black", foreground="white") ``` to work, however this only changes the background of the area included in the widget. I checked to see if it was a resizing issue, but everything seems to be in order. I also looked for similar issues online thinking I was doing it wrong and found two links pointing to Bryan Oakley having the same issue back in 2007. Bryan Oakley Re: how to get a ttk::treeview with no border how to create a ttk::treeview without a border? Essentially, the conclusion was that this is a bug when run on windows. Because of this, I'm left with 3 general questions: Am I…

Accepted Answer

To make the background of a Treeview totally black, both the `background` and the `fieldbackground` options of the Treeview style need to be set to black.

In addition, not all ttk themes support the `fieldbackground` option, like the "xpnative" and "vista" themes.

Code:

```
import tkinter as tk
from tkinter import ttk

root = tk.Tk()

style = ttk.Style(root)
# set ttk theme to "clam" which support the fieldbackground option
style.theme_use("clam")
style.configure("Treeview", background="black", 
                fieldbackground="black", foreground="white")

tree = ttk.Treeview(root)
tree.insert("", 0, "item", text="item")
tree.pack()

root.mainloop()
```

How to fully change the background color on a tkinter.ttk Treeview

Solution

Problem