如何删除小部件 Tkinter Treeview 上的缩进？

Question

Can I somehow remove this indentation? I know that I can remove the first column, but then I can not insert the image.

import tkinter as tk
import tkinter.ttk as ttk
from PIL import Image, ImageTk

class App:
    def __init__(self, master):
        self.tree = ttk.Treeview(master)
        self.tree.heading('#0', text='Directory', anchor='w')
        self.tree["columns"]=("num_files")
        self.tree.heading('num_files', text='Number of files', anchor='w')

        self.image_tk = ImageTk.PhotoImage(Image.open('icon.png'))

        for i in range(10):
            self.tree.insert('', 'end', text="Dir %d" % (i+1), values=(15), open=False, image=self.image_tk)
        self.tree.pack(expand=1,fill="both")

root = tk.Tk()
app = App(root)
root.mainloop()

Answer 1

Assuming the indentation you're referring to is the left side of the first column (left of all the icons), you can adjust the entire widget padding as needed. For your application, start with:

self.tree = ttk.Treeview(master, padding=[-15,0,0,0])

Answer 2

What you have highlighted in red is the area in which the Treeview's indicator resides -- the open or close toggle icon -- that is shown if any of the Item objects contain subitems of their own.

One way to accomplish removing that area would be to just remove the indicator altogether while using a ttk theme that allows you to do so.

s = ttk.Style()
s.theme_use('default')
s.configure('Treeview.Item', indicatorsize=0)

This approach seems to only work for the default , clam and classic themes on Windows 10. For other themes, Ron's answer may be your best bet.