Dropdown issue

[AhmedMomen-EL]

The problem appeared about a month ago. The same code was working without problems, and I don't know why. The dropdown works fine, but when I try to change the month or year using the month or year buttons, the dropdown menu automatically disappears, leaving me unable to select a month or year.

When I changed the code to this:

and this is the code where i deal with it

             if field_type == "date":
                date_container = ttk.Frame(section_frame)
                date_container.grid(row=r*2+1, column=c, padx=5, pady=(0,10), sticky='we')

                entry = CustomDateEntry(
                    date_container,
                    textvariable=var,
                    width=15,
                    foreground='white',
                    date_pattern='yyyy-mm-dd',
                    state="readonly"
                )
                entry.pack(side='left', fill='x', expand=True)

                clear_date(entry)

                clear_btn = ttk.Button(
                    date_container,
                    text="✕",
                    width=2,
                    command=lambda e=entry: clear_date(e)
                )
                clear_btn.pack(side='right', padx=(5,0))

                entry_vars[key] = entry
            else:
                entry = ttk.Entry(section_frame, textvariable=var, width=22)
                entry.grid(row=r*2+1, column=c, padx=5, pady=(0,10))
                entry_vars[key] = var

The problem became:
It allows me to select the date the first time without any problems, but when I try to select the date again, the same problem occurs when I try to change the month or year, and I have to select a different cell to solve the problem.

[dineshjk]

I face the same problem irrespective of trying different codes. The problem happens if we immediately reopen the calendar after choosing a date. However, if we open the widget, choose the date, close it, do something else (like editing other fields or some suc ah activity) and again open the widget, then it works.

`
def enter_data(parent):

# Prevent duplicate window
for child in parent.winfo_children(): # CG loop through all children of the parent window
    if isinstance(child, tk.Toplevel) and child.title() == "Data Entry - Child":
        child.lift() # CG bring the existing window to the front. The first one found with this tile will be lifted.
        return

win = tk.Toplevel(parent)
win.title("Data Entry - Child")
win.geometry("520x320")
win.resizable(False, False)
win.transient(parent)
win.grab_set()

tk.Label(win, text="Data Entry", font=("Helvetica", 16, "bold"),
         bg="navy", fg="white", pady=5).pack(fill="x")

form_frame = tk.Frame(win, padx=10, pady=10)
form_frame.pack(fill="both", expand=True)

entries = {}

# --- Child Name ---
tk.Label(form_frame, text="Child Name").grid(row=0, column=0, sticky="w", pady=2)
child_name_entry = tk.Entry(form_frame, width=38)
child_name_entry.grid(row=0, column=1, pady=2, sticky="w")
entries["child_name"] = child_name_entry

# --- Birth Date ---
tk.Label(form_frame, text="Birth Date").grid(row=1, column=0, sticky="w", pady=2)
birth_date_entry = DateEntry(form_frame, date_pattern="yyyy-mm-dd", width=12)
birth_date_entry.grid(row=1, column=1, pady=2, sticky="w")
entries["birth_date"] = birth_date_entry

# win.wait_window(win)

`

[AhmedMomen-EL]

I tried This and it worked well and fixed the issue

class CustomDateEntry(DateEntry):
def init(self, master=None, **kw):
defaults = {
'date_pattern': 'yyyy-mm-dd',
'state': 'readonly'
}
defaults.update(kw)
super().init(master, **defaults)

    self.bind("<Key>", lambda e: "break")
    self.bind("<Control-v>", lambda e: "break")
    self.bind("<Button-3>", lambda e: "break")
    self.bind("<space>", lambda e: "break")
    self.bind("<Tab>", lambda e: "break")
    
    self.bind("<Button-1>", self._handle_click)
    
    self.bind("<FocusIn>", self._handle_focus_in)
    
    self.bind("<<DateEntrySelected>>", self._remove_selection)

def _handle_click(self, event):
    if event.x < self.winfo_width() - 20:
        return "break"
    
    if not hasattr(self, '_top_cal') or not self._top_cal:
        self.drop_down()
    
    top_cal = self._top_cal
    
    x = self.winfo_rootx()
    y = self.winfo_rooty()
    height = self.winfo_height()
    screen_height = self.winfo_screenheight()
    cal_height = top_cal.winfo_reqheight()
    
    if y + height + cal_height <= screen_height:
        y_pos = y + height
    else:
        y_pos = y - cal_height
    
    top_cal.geometry(f"+{x}+{y_pos}")
    top_cal.deiconify()
    top_cal.lift()
    return "break"

def _handle_focus_in(self, event):
    self.after(100, self.select_clear)

def _remove_selection(self, event=None):
    self.after(100, self.select_clear)
    self.after(100, lambda: self.configure(state='readonly'))

[dineshjk]

Thanks for contributing. But unfortunately, it did not work for me. I guess the geometry has the least to do with the problem. There is some problem with improper binding, I guess. I may be mistaken though.

Thanks once again.

[salsalex2001]

Hello,
I also faced this issue on Mac OS 15.6.1 with python 3.14 and tcl/tk 8.6.17.
I found in issue 41 discussion a user who proposed a patch that you may already know (#41 (comment)) - but I see it is not yet applied, maybe for some valid reason.
I tested it on my setup and it just works pretty fine, the calendar just appears as expected and this seems repeatable...
Any chance to get it considered and maybe released ?
Thank you.