将拖动函数绑定到Tkinter UI中的对象

import tkinter as tk

class DraggableRectangle:
    def __init__(self, canvas, x1, y1, x2, y2):
        self.canvas = canvas
        self.rect = canvas.create_rectangle(x1, y1, x2, y2, fill="blue")
        self.drag_data = {"x": 0, "y": 0, "item": None}
        self.canvas.tag_bind(self.rect, "<Button1-Motion>", self.on_drag)
        self.canvas.tag_bind(self.rect, "<ButtonPress-1>", self.on_press)
        self.canvas.tag_bind(self.rect, "<ButtonRelease-1>", self.on_release)

    def on_press(self, event):
        # 记录按下时的坐标和对象
        self.drag_data["item"] = self.rect
        self.drag_data["x"] = event.x
        self.drag_data["y"] = event.y

    def on_drag(self, event):
        # 计算移动的距离并更新矩形位置
        dx = event.x - self.drag_data["x"]
        dy = event.y - self.drag_data["y"]
        self.canvas.move(self.drag_data["item"], dx, dy)
        self.drag_data["x"] = event.x
        self.drag_data["y"] = event.y

    def on_release(self, event):
        # 清除拖动数据
        self.drag_data["item"] = None
        self.drag_data["x"] = 0
        self.drag_data["y"] = 0

# 创建Tkinter窗口
root = tk.Tk()
canvas = tk.Canvas(root, width=400, height=400)
canvas.pack()

# 创建可拖动的矩形
rect = DraggableRectangle(canvas, 50, 50, 100, 100)

# 运行Tkinter事件循环
root.mainloop()