python tkinter如何使用canvas在特定列表中查找最近的项目

from tkinter import *

root = Tk()
canvas = Canvas(root, width=400, height=400)
canvas.pack()

projects = ["Project A", "Project B", "Project C", "Project D"]

def find_nearest_project(x, y):
    nearest_project = None
    min_distance = float("inf")  # 初始化最小距离为无穷大

    for project in projects:
        # 计算项目的中心坐标
        project_x = canvas.coords(project)[0] + (canvas.coords(project)[2] - canvas.coords(project)[0]) / 2
        project_y = canvas.coords(project)[1] + (canvas.coords(project)[3] - canvas.coords(project)[1]) / 2

        # 计算鼠标点击位置与项目中心的距离
        distance = ((x - project_x) ** 2 + (y - project_y) ** 2) ** 0.5

        # 更新最小距离和最近的项目
        if distance < min_distance:
            min_distance = distance
            nearest_project = project

    return nearest_project

def mouse_click(event):
    x = event.x
    y = event.y
    nearest_project = find_nearest_project(x, y)
    print("最近的项目是：", nearest_project)

canvas.bind("<Button-1>", mouse_click)  # 绑定鼠标点击事件

for i, project in enumerate(projects):
    # 计算项目的位置
    x = 50
    y = 50 + i * 50
    width = 100
    height = 30

    # 在Canvas上绘制项目
    canvas.create_rectangle(x, y, x + width, y + height, fill="lightblue")
    canvas.create_text(x + width / 2, y + height / 2, text=project, fill="black")

root.mainloop()  # 运行主循环