如何让ttk.Notebook标签页内的Treeview自动调整尺寸

我在ttk.Notebook组件的标签页中创建了一个Treeview，想要实现Treeview随窗口自动调整尺寸、填充所有可用空间的效果。参考过相关布局方案，但不想混合使用.grid与.pack布局，调整字体大小也没有明显效果，Treeview放置在标签页的Frame中始终无法填满空间。

示例代码 #

import tkinter as tk
from tkinter import ttk
from tkinter.messagebox import showinfo

root = tk.Tk()
root.title('Treeview demo')
root.geometry('800x400')

# root.grid_rowconfigure(0, weight=1)
# root.grid_columnconfigure(0, weight=1)

tabControl = ttk.Notebook(root)
tab1 = ttk.Frame(tabControl)
tabControl.add(tab1, text="Tab 1")

tab2 = ttk.Frame(tabControl)
tabControl.add(tab2, text="Tab 2")

tab1.grid_rowconfigure(0, weight=1)
tab1.grid_columnconfigure(0, weight=1)
tabControl.grid(row=0, column=0, sticky='nsew')

# style the widget
s = ttk.Style()
s.theme_use('clam')
LARGE_FONT = 14
MON_FONTSIZE = 12
s.configure('Treeview.Heading', font=(None, LARGE_FONT), rowheight=int(LARGE_FONT*2.5))
s.configure('Treeview', font=(None, MON_FONTSIZE), rowheight=int(MON_FONTSIZE*2.5))

# define columns
columns = ('first_name', 'last_name', 'email')

tree = ttk.Treeview(tab1, columns=columns, show='headings')

# define headings
tree.heading('first_name', text='First Name')
tree.heading('last_name', text='Last Name')
tree.heading('email', text='Email')
s.configure('Treeview.Heading', background="green3")

# generate sample data
contacts = []
for n in range(1, 100):
    contacts.append((f'first {n}', f'last {n}', f'email{n}@example.com'))

# add data to the treeview AND tag the row color
i = 1
for contact in contacts:
    i += 1
    if i%2:
        tree.insert('', tk.END, values=contact, tags = ('oddrow',))
    else:
        tree.insert('', tk.END, values=contact, tags = ('evenrow',))
    

def item_selected(event):
    for selected_item in tree.selection():
        item = tree.item(selected_item)
        record = item['values']
        # show a message
        showinfo(title='Information', message=','.join(record))


tree.bind('<<TreeviewSelect>>', item_selected)

tree.grid(row=0, column=0, sticky='nsew')

# add a scrollbar
scrollbar = ttk.Scrollbar(tab1, orient=tk.VERTICAL, command=tree.yview)
tree.configure(yscroll=scrollbar.set)
scrollbar.grid(row=0, column=1, sticky='ns')

# style row colors
tree.tag_configure('oddrow', background='lightgrey')
tree.tag_configure('evenrow', background='white')

# run the app
root.mainloop()

效果对比 #

期望效果 #

当前效果（未修改代码） #

解决方案 #

只需修改一处关键配置，同时确保现有布局参数正确：

1. 取消注释root窗口的网格权重配置，让tabControl能够填满整个主窗口空间：

   root.grid_rowconfigure(0, weight=1)
   root.grid_columnconfigure(0, weight=1)
   

2. 你代码中已经正确设置了tab1的网格权重、Treeview和滚动条的sticky参数，无需额外修改。

修改后，Treeview会随窗口尺寸变化自动扩展，填满标签页内的可用空间。

内容的提问来源于stack exchange，提问作者Paul-ET