python tkinter实现鼠标悬停提示

#  _*_ coding:utf-8 _*_
import tkinter as tk
import pyautogui


screen_width, screen_height = pyautogui.size()


class WidgetTip:
    """鼠标悬停提示"""
    def __init__(self, widget, text):
        self.widget = widget
        self.text = text
        self.tips_alpha = 1
        self.tooltip = tk.StringVar()
        self.tip_pos = 5
        # 消息体
        self.tooltip_window = tk.Toplevel()
        self.init_tips()
        # 绑定鼠标事件
        self.widget.bind("<Enter>", self.enter)
        self.widget.bind("<Motion>", self.move)
        self.widget.bind("<Leave>", self.leave)

    def init_tips(self):
        """初始化消息框"""
        self.tooltip_window.attributes("-alpha", 0)
        self.tooltip_window.attributes("-toolwindow", 1)
        self.tooltip_window.wm_overrideredirect(True)
        self.tooltip_window.attributes('-topmost', 100)
        pad_x = 20      # 内边距 x
        tk.Label(self.tooltip_window,
                 textvariable=self.tooltip,
                 background="#ffffff",
                 justify=tk.LEFT,
                 relief="solid",
                 borderwidth=0,
                 wraplength=screen_width - pad_x,
                 padx=pad_x, pady=10).pack()

    def enter(self, event=None):
        self.tooltip_window.lift()
        if isinstance(self.text, (tk.StringVar, tk.IntVar, tk.BooleanVar, tk.DoubleVar)):
            tips_text = str(self.text.get())
        else:
            tips_text = str(self.text)
        self.tooltip.set(tips_text)
        self.set_tooltip_window_geometry(event)
        self.tooltip_window.attributes("-alpha", self.tips_alpha)

    def move(self, event=None):
        self.set_tooltip_window_geometry(event)

    def leave(self, event=None):
        self.tooltip_window.attributes("-alpha", 0)
        self.set_tooltip_window_geometry(event)

    def set_tooltip_window_geometry(self, event):
        cost_length = event.x_root + self.tip_pos + self.tooltip_window.winfo_width() - screen_width
        if cost_length < 0:
            cost_length = 0
        self.tooltip_window.geometry("+%d+%d" % (event.x_root + self.tip_pos - cost_length, event.y_root + self.tip_pos))


# 创建主窗口
root = tk.Tk()
root.title("鼠标悬停提示")

var_str = tk.StringVar()

# 创建一个按钮并添加 Tooltip
button = tk.Button(root, text="鼠标放这")
button.pack(pady=20)

var_str.set('动态文本按钮')

button2 = tk.Button(root, text=var_str.get())
button2.pack(pady=20)

var_str.set('这是一条动态文本提示语')

WidgetTip(button, "这是一条提示鼠标悬停提示信息")
WidgetTip(button2, var_str)


# 运行主循环
root.mainloop()