python / tkinter弹出窗口在Windows或linux上看起来不错，但在OSX Mojave上却不行。没有错误

Question

“”我正在从“ GUI编程指南”中学习Tkinter。使用运行Mojave，python3.8和包装的Tkinter的MacBook Pro。有一种方法可以将鼠标悬停在鼠标上时显示弹出式工具提示。小部件。在Win 10和linux上工作正常，但弹出窗口未出现在我的Mac上。没有错误。

我放入了一些debug print（）语句，并且鼠标坐标和移动正确。

这有效****。窗口文本悬停在小部件上]

这里是Linux上print（sys.version）的输出。

3.7.4（默认值，2019年7月9日，16：48：28）[GCC 8.3.1 20190223（Red Hat 8.3.1-2）]

此操作无效****弹出窗口不出现

在Mac上为print（sys.version）的输出

3.8.0（v3.8.0：fa919fdf25，2019年10月14日，10:23:27）[Clang 6.0（clang-600.0.57）]

====================>

'''
Created on May 3, 2019

@author: Burkhard A. Meier
'''
#======================
# imports
#======================
import tkinter as tk
from tkinter import ttk
from tkinter import scrolledtext
from tkinter import Menu
from tkinter import messagebox as msg
from tkinter import Spinbox


        #====================================================
class ToolTip(object):
    def __init__(self, widget, tip_text=None):
        self.widget = widget
        self.tip_text = tip_text
        widget.bind('<Enter>', self.mouse_enter) 
          # bind mouse events
        widget.bind('<Leave>', self.mouse_leave)

    def mouse_enter(self, _event):
        self.show_tooltip()
        print('entered the widget')

    def mouse_leave(self, _event):
        self.hide_tooltip()
        print('entered the widget')

    def show_tooltip(self):
        if self.tip_text:
            x_left = self.widget.winfo_rootx()
                # get widget top-left coordinates
            y_top = self.widget.winfo_rooty() - 18  

            #DEBUG
            print('self.widget, y_top, x_left')
            print(self.widget, y_top, x_left)

            # place tooltip above widget or it flickers

            self.tip_window = tk.Toplevel(self.widget)   
           # create Toplevel window; parent=widget
            self.tip_window.overrideredirect(True)     
            # remove surrounding toolbar window
            self.tip_window.geometry("+%d+%d" % (x_left, y_top)) 
            # position tooltip

            #print('\nTOOLTIP before author code line')
            #print(self.tip_text)
            #label = tk.Label(self.tip_window, text=self.tip_text,
             #justify=tk.LEFT, background="#ffffe0",
             # relief=tk.SOLID,
             #borderwidth=1, font=("tahoma", "8", "normal"))

            #below is my code cus the above line does 
            #not show up EKK 10/25/19

            label = tk.Label(self.tip_window, text=self.tip_text,
             justify=tk.LEFT)
            label.pack(fill="both")
            #label.pack(ipadx=1)

            print('TOOLTIP after author code line')
            print(self.tip_text)

    def hide_tooltip(self):
        if self.tip_window:
            self.tip_window.destroy()

#=====================================================
# just added all the code.
# the above class is called by the Spinbox and Scroll methods below.

          # Create instance
win = tk.Tk()   

# Add a title       
win.title("Python GUI")  

tabControl = ttk.Notebook(win)          # Create Tab Control

tab1 = ttk.Frame(tabControl)            # Create a tab 
tabControl.add(tab1, text='Tab 1')      # Add the tab
tab2 = ttk.Frame(tabControl)            # Add a second tab
tabControl.add(tab2, text='Tab 2')      # Make second tab visible

tabControl.pack(expand=1, fill="both")  # Pack to make visible

# LabelFrame using tab1 as the parent
mighty = ttk.LabelFrame(tab1, text=' Mighty Python ')
mighty.grid(column=0, row=0, padx=8, pady=4)

# Modify adding a Label using mighty as the parent instead of win
a_label = ttk.Label(mighty, text="Enter a name:")
a_label.grid(column=0, row=0, sticky='W')

# Modified Button Click Function
def click_me(): 
    action.configure(text='Hello ' + name.get() + ' ' + 
                     number_chosen.get())

# Adding a Textbox Entry widget
name = tk.StringVar()
name_entered = ttk.Entry(mighty, width=12, textvariable=name)
name_entered.grid(column=0, row=1, sticky='W')               
# align left/West

# Adding a Button
action = ttk.Button(mighty, text="Click Me!", command=click_me)   
action.grid(column=2, row=1)                                

ttk.Label(mighty, text="Choose a number:").grid(column=1, row=0)
number = tk.StringVar()
number_chosen = ttk.Combobox(mighty, width=12, textvariable=number, state='readonly')
number_chosen['values'] = (1, 2, 4, 42, 100)
number_chosen.grid(column=1, row=1)
number_chosen.current(0)

# Spinbox callback 
def _spin():
    value = spin.get()
    print(value)
    scrol.insert(tk.INSERT, value + '\n')

# Adding a Spinbox widget
spin = Spinbox(mighty, values=(1, 2, 4, 42, 100), width=5, bd=9, command=_spin) 
# using range
spin.grid(column=0, row=2)

    # Add a Tooltip to the Spinbox
ToolTip(spin, 'This is a Spin control')

# Using a scrolled Text control    
scrol_w  = 30
scrol_h  =  3
scrol = scrolledtext.ScrolledText(mighty, width=scrol_w, height=scrol_h, wrap=tk.WORD)
scrol.grid(column=0, row=3, sticky='WE', columnspan=3)                    

# Add a Tooltip to the ScrolledText widget 
ToolTip(scrol, 'This is a ScrolledText widget') 

# Bunch of code snipped here

name_entered.focus()      # Place cursor into name Entry
#======================
# Start GUI
#======================
win.mainloop()

该类是从其他代码中调用的。第42和46行上的标签不会在我的MacBook上显示，但在Windows和Linux上一切正常。没有错误消息。窗口永远不会出现。有人有建议吗？我要疯了！提前致谢。

“”我正在从“ GUI编程指南”中学习Tkinter。使用运行Mojave，python3.8和打包的Tkinter的MacBook Pro。有一种方法可以在... ...时显示弹出工具提示。

Answer 1

[如果您在Mac OSX上仍然有此问题，我发现了一个指向[d]的reddit thread：

https://github.com/python/cpython/blob/master/Lib/idlelib/tooltip.py