如何让Tkinter带滚动条的文本框可通过鼠标拖动调整大小？

方法1：使用PanedWindow组件（快速实现） #

PanedWindow是Tkinter内置的支持拖动调整子组件尺寸的容器，只需替换原代码中的普通Frame即可实现需求：

import tkinter as tk          
import sys

class Redirect():
    def __init__(self, widget, autoscroll=True):
        self.widget = widget
        self.autoscroll = autoscroll
        self.output = widget
              
    def write(self, text):
        self.widget.insert('end', text)
        if self.autoscroll:
            self.widget.see("end")
        self.output.update_idletasks()

root = tk.Tk()
root.geometry("1200x620+1+1")

# 替换普通Frame为PanedWindow，允许拖动调整大小
paned_frame = tk.PanedWindow(root, orient=tk.VERTICAL)
paned_frame.place(x=650, y=310, anchor="c", width=850, height=400)

# 文本框容器放入PanedWindow
text_frame = tk.Frame(paned_frame)
paned_frame.add(text_frame)

text=tk.Text(text_frame, width=25, height=8, wrap='word') 
text.pack(side='left', fill='both', expand=True )

scrollbar = tk.Scrollbar(text_frame)
scrollbar.pack(side='right', fill='y')

text['yscrollcommand'] = scrollbar.set
scrollbar['command'] = text.yview

old_stdout = sys.stdout    
sys.stdout = Redirect(text)

root.mainloop()
sys.stdout = old_stdout

• 拖动PanedWindow显示的分隔线即可调整文本框区域大小
• 若需横向调整，将orient=tk.VERTICAL改为tk.HORIZONTAL

方法2：手动实现边缘拖动（自定义程度高） #

如果需要支持拖动任意边缘调整大小，可通过绑定鼠标事件自定义实现：

import tkinter as tk          
import sys

class Redirect():
    def __init__(self, widget, autoscroll=True):
        self.widget = widget
        self.autoscroll = autoscroll
        self.output = widget
              
    def write(self, text):
        self.widget.insert('end', text)
        if self.autoscroll:
            self.widget.see("end")
        self.output.update_idletasks()

class ResizableFrame(tk.Frame):
    def __init__(self, parent, *args, **kwargs):
        super().__init__(parent, *args, **kwargs)
        self.bind("<Button-1>", self.start_resize)
        self.bind("<B1-Motion>", self.resize)
        # 定义边缘可拖动区域宽度（像素）
        self.resize_border = 10

    def start_resize(self, event):
        # 记录初始状态
        self.start_x = event.x
        self.start_y = event.y
        self.start_width = self.winfo_width()
        self.start_height = self.winfo_height()

    def resize(self, event):
        # 计算新尺寸并限制最小值
        new_width = self.start_width + (event.x - self.start_x)
        new_height = self.start_height + (event.y - self.start_y)
        if new_width > 100 and new_height > 50:
            self.config(width=new_width, height=new_height)

root = tk.Tk()
root.geometry("1200x620+1+1")

# 使用自定义可拖动Frame
frame = ResizableFrame(root)
frame.place(x=650, y=310, anchor="c", width=850, height=400 ) 

text=tk.Text(frame, width=25, height=8, wrap='word') 
text.pack(side='left', fill='both', expand=True )

scrollbar = tk.Scrollbar(frame)
scrollbar.pack(side='right', fill='y')

text['yscrollcommand'] = scrollbar.set
scrollbar['command'] = text.yview

old_stdout = sys.stdout    
sys.stdout = Redirect(text)

root.mainloop()
sys.stdout = old_stdout

• 鼠标点击Frame边缘（10像素范围内）拖动即可调整大小
• 可修改resize_border调整可拖动区域宽度，修改最小尺寸限制值适配需求

内容的提问来源于stack exchange，提问作者kyazgan