[issue46179] Delete selected item generate "<>" event or not in different version of tkinter or Python

[Jason Yang]

New submission from Jason Yang :

In python(3.8.10)/tkinter(8.6.9), it won't generate "<>" event 
if we delete selected item of ttk.Treeview, but it will for 
python(3.9.9/3.10.1)/tkinter(8.6.12).

Check it just by clicking 'Delete Item 1' button in following demo code

```python
import sys
from random import randint
from datetime import datetime
import tkinter as tk
from tkinter import ttk

def button_callback():
button.configure(state='disabled')
treeview.delete(1)

def treeview_callback(event):
print(datetime.now().strftime("%H:%M:%S"), "Treeview selection changed !")

print(f"Python version : {sys.version.split(' ')[0]}")
print(f"tkinter version: {tk.Tcl().eval('info patchlevel')}")

columns = ('President', 'Birthday')
data = [
('Ronald Reagan', 'February 6'),
('Abraham Lincoln', 'February 12'),
('George Washington', 'February 22'),
('Andrew Jackson', 'March 15'),
('Thomas Jefferson', 'April 13'),
]

root = tk.Tk()

treeview = ttk.Treeview(root, columns=columns, height=5, show='headings')
treeview.pack()
for column in columns:
treeview.heading(column, text=column)
treeview.column(column, width=150)
for i, row in enumerate(data):
treeview.insert('', i, iid=i, text=str(i), values=row)
treeview.selection_set(1)

button = tk.Button(root, text='Delete Item 1', command=button_callback)
button.pack()

treeview.bind("<>", treeview_callback)

root.mainloop()
```

```python
d:\>python test3.py
Python version : 3.8.10
tkinter version: 8.6.9
17:57:43 Treeview selection changed !

d:\>python test3.py
Python version : 3.9.9
tkinter version: 8.6.12
17:58:10 Treeview selection changed !
17:58:11 Treeview selection changed !

d:\>python test3.py
Python version : 3.10.1
tkinter version: 8.6.12
18:01:10 Treeview selection changed !
18:01:12 Treeview selection changed !
```

--
components: Tkinter
messages: 409185
nosy: Jason990420
priority: normal
severity: normal
status: open
title: Delete selected item generate "<>" event or not in 
different version of tkinter or Python
type: behavior
versions: Python 3.10, Python 3.8, Python 3.9

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[issue46180] Button clicked failed when mouse hover tooltip and tooltip destroyed

[Jason Yang]

New submission from Jason Yang :

Button no response when clicked if mouse move into tooltip and tooltip 
destroyed for Python 3.9.9/3.10.1 and tkinter 8.6.12

You can check it by moving mouse into button, then move to tooltip after it 
shown, then click button and you won't get response for button clicked, but 
"Leave". It is OK for lower version of Python/tkinter.

```python
import sys
from datetime import datetime
import tkinter as tk

class Tooltip(object):
"""
create a tooltip for a given widget
"""
def __init__(self, widget, text='widget info'):
self.waittime = 500 # miliseconds
self.widget = widget
self.text = text
self.widget.bind("", self.enter)
self.widget.bind("", self.leave)
self.widget.bind("", self.leave)
self.id = None
self.top = None

def enter(self, event=None):
print(now(), "Enter")
self.schedule()

def leave(self, event=None):
print(now(), "Leave")
self.unschedule()
self.hidetip()

def schedule(self):
self.unschedule()
self.id = self.widget.after(self.waittime, self.showtip)

def unschedule(self):
id = self.id
self.id = None
if id:
self.widget.after_cancel(id)

def showtip(self, event=None):
x = y = 0
x, y, cx, cy = self.widget.bbox("insert")
x += self.widget.winfo_rootx() + self.widget.winfo_width()//2
y += self.widget.winfo_rooty() + self.widget.winfo_height()//2
self.top = tk.Toplevel(self.widget)
self.top.wm_overrideredirect(True)
self.top.wm_geometry("+%d+%d" % (x, y))
label = tk.Label(self.top, text=self.text, bd=1, font=font, 
relief='solid')
label.pack(ipadx=1)

def hidetip(self):
top = self.top
self.top = None
if top:
top.destroy()

def now():
return datetime.now().strftime("%H:%M:%S")

print(f"Python version : {sys.version.split(' ')[0]}")
print(f"tkinter version: {tk.Tcl().eval('info patchlevel')}")

font = ("Courier New", 40)

root = tk.Tk()
button = tk.Button(root, text="button", font=font,
command=lambda:print(now(), 'Button clicked'))
button.pack(padx=10, pady=5)
tooltip = Tooltip(button, 'This is button 1')

root.mainloop()
```

```python
d:\>python test.py
Python version : 3.10.1
tkinter version: 8.6.12
18:21:52 Enter (Mouse to button)
18:21:54 Leave (mouse to tooltip)
18:21:55 Leave (button clicked get no response)
18:21:57 Leave (button clicked get no response)
18:21:58 Leave (button clicked get no response)

d:\>python test.py
Python version : 3.9.9
tkinter version: 8.6.12
18:22:51 Enter (Mouse to button)
18:22:54 Leave (mouse to tooltip)
18:22:55 Leave (button clicked get no response)
18:22:56 Leave (button clicked get no response)
18:22:57 Leave (button clicked get no response)

d:\>python test.py
Python version : 3.8.10
tkinter version: 8.6.9
18:23:22 Enter (Mouse to button)
18:23:23 Leave (mouse to tooltip)
18:23:23 Enter (mouse stay, and it will repeat `Enter and Leave` again and 
again)
18:23:24 Leave
...
18:23:28 Enter
18:23:28 Leave
18:23:28 Button clicked (button clicked get response)
18:23:31 Leave
18:23:31 Button clicked (button clicked get response)
18:23:32 Leave
```

Platform - WIN10

--
components: Tkinter
messages: 409188
nosy: Jason990420
priority: normal
severity: normal
status: open
title: Button clicked failed when mouse hover tooltip and tooltip destroyed
type: crash
versions: Python 3.10, Python 3.8, Python 3.9

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[issue46179] Delete selected item generate "<>" event or not in different version of tkinter or Python

[Jason Yang]

Jason Yang  added the comment:

>From https://core.tcl-lang.org/tk/reportlist, I found the same issue

ttk::treeview <> event bug 
https://core.tcl-lang.org/tk/tktview?name=2a6c62afd9

It is an old bug from 2014 anf not fixed, and now it fixed.
OK, no more question about it.

Thank you for your information.



B.R.,

Jason Yng

--
resolution:  -> fixed
stage:  -> resolved
status: open -> closed

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[issue46180] Button clicked failed when mouse hover tooltip and tooltip destroyed

[Jason Yang]

Jason Yang  added the comment:

The platform is WIN10 which shown at last line in first message.
I don't have other platforms to test if ok or not.

--

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[issue46803] Item not shown when using mouse wheel to scroll for Listbox/Combobox

[Jason Yang]

New submission from Jason Yang :

When scrolled items by mouse wheel in tk.Listbox/ttk.Combobox, some items not 
shown.

Is it a bug ? or I did something wrong ?

In following case, 'Wednesday' will not shown when scroll mouse wheel at

- tk.Listbox or vertical scrollbar of tk.Listbox, or
- listbox of ttk.Combo

```python
from tkinter import *
from tkinter import ttk

font = ('Courier New', 24)
lst = ('Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 
'Saturday')

root = Tk()

frame1 = Frame(root)
frame1.pack(side=LEFT)
vsb1 = Scrollbar(frame1, orient='v')
vsb1.pack(side=RIGHT, fill='y')
var = StringVar()
var.set(lst)
listbox = Listbox(frame1, width=10, height=3, listvariable=var, font=font, 
yscrollcommand=vsb1.set)
listbox.pack(side=LEFT)
vsb1.configure(command=listbox.yview)

frame2 = Frame(root)
frame2.pack(side=LEFT, fill='y')
combobox = ttk.Combobox(frame2, values=lst, width=10, height=3, font=font)
combobox.pack()

root.mainloop()
```

Platform: WIN10

--
components: Tkinter
files: PeS9r.png
messages: 413564
nosy: Jason990420
priority: normal
severity: normal
status: open
title: Item not shown when using mouse wheel to scroll for Listbox/Combobox
type: behavior
versions: Python 3.8, Python 3.9
Added file: https://bugs.python.org/file50634/PeS9r.png

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