"I'm learning Tkinter from the "GUI Programming Cookbook". Using my MacBook Pro running Mojave, python3.8 and the Tkinter that came packaged. There is one method where a popup tool tip shows when the mouse is hovered over a widget. It works fine on Win 10 and linux, but the popup does not appear on my Mac. There are no errors.
I put in some debug print() statements and the mouse coordinates and movement are correct.
This works****. Window text hovers over widget
here is output from print(sys.version) on linux.
3.7.4 (default, Jul 9 2019, 16:48:28) [GCC 8.3.1 20190223 (Red Hat 8.3.1-2)]
This doe NOT work **** popup does not appear
output from print(sys.version) on Mac
3.8.0 (v3.8.0:fa919fdf25, Oct 14 2019, 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()
the class is called from other code. the label on lines 42 and 46 will not show up on my MacBook but everything is fine on windows and Linux. There are no error messages. the window just never appears. anyone have suggestions?? I'm going nuts here! Thanks in advance.
