如何实现Python编写的图形界面可以自由拖动

import tkinter as tk
 
def on_drag_start(event):
    global x_start, y_start
    x_start = event.x_root
    y_start = event.y_root
 
def on_drag_motion(event):
    global x_start, y_start
    delta_x = event.x_root - x_start
    delta_y = event.y_root - y_start
    x_new = root.winfo_x() + delta_x
    y_new = root.winfo_y() + delta_y
    root.geometry(f"+{x_new}+{y_new}")
 
    x_start = event.x_root
    y_start = event.y_root
 
root = tk.Tk()
root.geometry("400x300")
 
# 仅将事件处理程序绑定到根窗口的背景上
root.bind('<Button-1>', on_drag_start)
root.bind('<B1-Motion>', on_drag_motion)
 
# 添加一个示例控件
button = tk.Button(root, text="按钮")
button.pack(pady=20)
 
label = tk.Label(root, text="移动窗口")
label.pack(pady=20)
 
root.mainloop()

import tkinter as tk
 
def draggable_window(func):
    def wrapper(*args, **kwargs):
        root = func(*args, **kwargs)
        
        def on_drag_start(event):
            root.x_start = event.x_root
            root.y_start = event.y_root
 
        def on_drag_motion(event):
            delta_x = event.x_root - root.x_start
            delta_y = event.y_root - root.y_start
            x_new = root.winfo_x() + delta_x
            y_new = root.winfo_y() + delta_y
            root.geometry(f"+{x_new}+{y_new}")
 
            root.x_start = event.x_root
            root.y_start = event.y_root
 
        root.bind('<Button-1>', on_drag_start)
        root.bind('<B1-Motion>', on_drag_motion)
        
        return root
    return wrapper
 
@draggable_window
def create_window():
    root = tk.Tk()
    root.geometry("400x300")
 
    # 添加控件
    button = tk.Button(root, text="按钮")
    button.pack(pady=20)
 
    label = tk.Label(root, text="移动窗口")
    label.pack(pady=20)
 
    return root
 
# 启动窗口
root = create_window()
root.mainloop()

import tkinter as tk
 
# 定义拖动功能的装饰器
def draggable(func):
    def wrapper(self, *args, **kwargs):
        func(self, *args, **kwargs)
        
        def on_drag_start(event):
            self.x_start = event.x_root
            self.y_start = event.y_root
 
        def on_drag_motion(event):
            delta_x = event.x_root - self.x_start
            delta_y = event.y_root - self.y_start
            x_new = self.root.winfo_x() + delta_x
            y_new = self.root.winfo_y() + delta_y
            self.root.geometry(f"+{x_new}+{y_new}")
 
            self.x_start = event.x_root
            self.y_start = event.y_root
 
        # 将拖动事件绑定到窗口
        self.root.bind('<Button-1>', on_drag_start)
        self.root.bind('<B1-Motion>', on_drag_motion)
 
    return wrapper
 
class DraggableWindow:
    @draggable
    def __init__(self):
        self.root = tk.Tk()
        self.root.geometry("400x300")
 
        # 添加控件
        self.add_widgets()
 
    def add_widgets(self):
        button = tk.Button(self.root, text="按钮")
        button.pack(pady=20)
 
        label = tk.Label(self.root, text="移动窗口")
        label.pack(pady=20)
 
    def run(self):
        self.root.mainloop()
 
# 启动窗口
app = DraggableWindow()
app.run()