SYSTEM: You are a Python 3.12 programmer, capable of analyzing problems in depth and explaining solutions in a clear and concise manner. Your responses prioritize code efficiency, readability, and simplicity. You leverage the latest Python features. When addressing tasks, you break them down into clear steps and present only essential information, ensuring users receive focused, expert guidance tailored to their needs. You only print the parts of the code you changed in a way that makes them easy to copy paste in the code base. USER: Implement check boxes for boolean values (Yes/No). Use the tkinter handbook for guidance. tkinter Handbook: Data Formatting

By default tksheet stores all user inputted data as strings and while tksheet can store and display any datatype with a str() method this has some obvious limitations.

Data formatting aims to provide greater functionality when working with different datatypes and provide strict typing for the sheet. With formatting you can convert sheet data and user input to a specific datatype.

Additionally, formatting also provides a function for displaying data on the table GUI (as a rounded float for example) and logic for handling invalid and missing data.

tksheet has several basic built-in formatters and provides functionality for creating your own custom formats as well.

A demonstration of all the built-in and custom formatters can be found here.
Creation and deletion of data formatting rules
Creating a data format rule

Span objects (more information here) can be used to format data for cells, rows, columns and the entire sheet.

You can use either of the following methods:

Using a span method e.g. span.format() more information here.
Using a sheet method e.g. sheet.format(Span)

Or if you need user inserted row/columns in the middle of areas with data formatting to also be formatted you can use named spans, more information here.

Whether data is formatted for cells, rows or columns depends on the kind of span.

format(
*key: CreateSpanTypes,
formatter_options: dict = {},
formatter_class: object = None,
redraw: bool = True,
**kwargs,
) -> Span

Notes:

When applying multiple overlapping formats with e.g. a formatted cell which overlaps a formatted row, the priority is as follows:
    Cell formats first.
    Row formats second.
    Column formats third.
Data formatting will effectively override validate_input = True on cells with dropdown boxes.
When getting data take careful note of the get_displayed options, as these are the difference between getting the actual formatted data and what is simply displayed on the table GUI.

Parameters:

key (CreateSpanTypes) either a span or a type which can create a span. See here for more information on the types that can create a span.
formatter_options (dict) a dictionary of keyword options/arguements to pass to the formatter, see here for information on what argument to use.
formatter_class (class) in case you want to use a custom class to store functions and information as opposed to using the built-in methods.
**kwargs any additional keyword options/arguements to pass to the formatter.

Deleting a data format rule

If the data format rule was created by a named span then the named span must be deleted, more information here.

Otherwise you can use either of the following methods to delete/remove data formatting rules:

Using a span method e.g. span.del_format() more information here.
Using a sheet method e.g. sheet.del_format(Span) details below:

del_format(
*key: CreateSpanTypes,
clear_values: bool = False,
redraw: bool = True,
) -> Span

key (CreateSpanTypes) either a span or a type which can create a span. See here for more information on the types that can create a span.
clear_values (bool) if true, all the cells covered by the span will have their values cleared.

Delete all formatting

del_all_formatting(clear_values: bool = False) -> Sheet

clear_values (bool) if true, all the sheets cell values will be cleared.

Reapply formatting to entire sheet

reapply_formatting() -> Sheet

Useful if you have manually changed the entire sheets data using sheet.MT.data = and want to reformat the sheet using any existing formatting you have set.

Check if a cell is formatted

formatted(r: int, c: int) -> dict

If the cell is formatted function returns a dict with all the format keyword arguments. The dict will be empty if the cell is not formatted.

Formatters

In addition to the generic formatter, tksheet provides formatters for many different data types.

A basic example showing how formatting some columns as float might be done:

import tkinter as tk

from tksheet import (
Sheet,
float_formatter,
)
from tksheet import (
num2alpha,
)

class demo(tk.Tk):
def init(self):
super().init()
self.grid_columnconfigure(0, weight=1)
self.grid_rowconfigure(0, weight=1)
self.sheet = Sheet(
self,
data=[[f"{r}", f"{r}"] for r in range(5)],
expand_sheet_if_paste_too_big=True,
theme="dark blue",
)
"""
Format example
"""
# some keyword arguments inside float_formatter()
self.sheet.format(
num2alpha(0), # column A
formatter_options=float_formatter(
decimals=1,
nullable=True,
),
)
# some keyword arguments outside
# of float_formatter() instead
self.sheet.format(
"B", # column B
formatter_options=float_formatter(),
decimals=3,
nullable=False,
)
"""
Rest of code
"""
self.sheet.grid(row=0, column=0, sticky="nswe")
self.sheet.enable_bindings(
"all",
"ctrl_select",
"edit_header",
"edit_index",
)

app = demo()
app.mainloop()

You can use any of the following formatters as an argument for the parameter formatter_options.

A full list of keyword arguments available to these formatters is shown here.
Int Formatter

The int_formatter is the basic configuration for a simple interger formatter.

int_formatter(
datatypes: tuple[object] | object = int,
format_function: Callable = to_int,
to_str_function: Callable = to_str,
invalid_value: object = "NaN",
**kwargs,
) -> dict

Parameters:

format_function (function) a function that takes a string and returns an int. By default, this is set to the in-built tksheet.to_int. This function will always convert float-likes to its floor, for example "5.9" will be converted to 5.
to_str_function (function) By default, this is set to the in-built tksheet.to_str, which is a very basic function that will displace the default string representation of the value.

Example:

sheet.format_cell(0, 0, formatter_options = tksheet.int_formatter())

Float Formatter

The float_formatter is the basic configuration for a simple float formatter. It will always round float-likes to the specified number of decimal places, for example "5.999" will be converted to "6.0" if decimals = 1.

float_formatter(
datatypes: tuple[object] | object = float,
format_function: Callable = to_float,
to_str_function: Callable = float_to_str,
invalid_value: object = "NaN",
decimals: int = 2,
**kwargs
) -> dict

Parameters:

format_function (function) a function that takes a string and returns a float. By default, this is set to the in-built tksheet.to_float.
to_str_function (function) By default, this is set to the in-built tksheet.float_to_str, which will display the float to the specified number of decimal places.
decimals (int, None) the number of decimal places to round to. Defaults to 2.

Example:

sheet.format_cell(0, 0, formatter_options = tksheet.float_formatter(decimals = None)) # A float formatter with maximum float() decimal places

Percentage Formatter

The percentage_formatter is the basic configuration for a simple percentage formatter. It will always round float-likes as a percentage to the specified number of decimal places, for example "5.999%" will be converted to "6.0%" if decimals = 1.

percentage_formatter(
datatypes: tuple[object] | object = float,
format_function: Callable = to_percentage,
to_str_function: Callable = percentage_to_str,
invalid_value: object = "NaN",
decimals: int = 0,
**kwargs,
) -> dict

Parameters:

format_function (function) a function that takes a string and returns a float. By default, this is set to the in-built tksheet.to_percentage. This function will always convert percentages to their decimal equivalent, for example "5%" will be converted to 0.05.
to_str_function (function) By default, this is set to the in-built tksheet.percentage_to_str, which will display the float as a percentage to the specified number of decimal places. For example, 0.05 will be displayed as "5.0%".
decimals (int) the number of decimal places to round to. Defaults to 0.

Example:

sheet.format_cell(0, 0, formatter_options=tksheet.percentage_formatter(decimals=1)) # A percentage formatter with 1 decimal place

Note:

By default percentage_formatter() converts user entry 21 to 2100% and 21% to 21%. An example where 21 is converted to 21% instead is shown below:
formats column A as percentage
uses:
format_function=alt_to_percentage
to_str_function=alt_percentage_to_str

sheet.format(
"A",
formatter_options=tksheet.percentage_formatter(
format_function=alt_to_percentage,
to_str_function=alt_percentage_to_str,
)
)

Bool Formatter

bool_formatter(
datatypes: tuple[object] | object = bool,
format_function: Callable = to_bool,
to_str_function: Callable = bool_to_str,
invalid_value: object = "NA",
truthy: set = truthy,
falsy: set = falsy,
**kwargs,
) -> dict

Parameters:

format_function (function) a function that takes a string and returns a bool. By default, this is set to the in-built tksheet.to_bool.
to_str_function (function) By default, this is set to the in-built tksheet.bool_to_str, which will display the boolean as "True" or "False".
truthy (set) a set of values that will be converted to True. Defaults to the in-built tksheet.truthy.
falsy (set) a set of values that will be converted to False. Defaults to the in-built tksheet.falsy.

Example:
A bool formatter with custom truthy and falsy values to account for aussie and kiwi slang

sheet.format_cell(0, 0, formatter_options = tksheet.bool_formatter(truthy = tksheet.truthy | {"nah yeah"}, falsy = tksheet.falsy | {"yeah nah"}))

Generic Formatter

formatter(
datatypes: tuple[object] | object,
format_function: Callable,
to_str_function: Callable = to_str,
invalid_value: object = "NaN",
nullable: bool = True,
pre_format_function: Callable | None = None,
post_format_function: Callable | None = None,
clipboard_function: Callable | None = None,
**kwargs,
) -> dict

This is the generic formatter options interface. You can use this to create your own custom formatters. The following options are available.

Note that all these options can also be passed to the Sheet() format functions as keyword arguments and are available as attributes for all formatters.

You can also provide functions of your own creation for all the below arguments which take functions if you require.

datatypes (list) a list of datatypes that the formatter will accept. For example, datatypes = [int, float] will accept integers and floats.
format_function (function) a function that takes a string and returns a value of the desired datatype. For example, format_function = int will convert a string to an integer.
to_str_function (function) a function that takes a value of the desired datatype and returns a string. This determines how the formatter displays its data on the table. For example, to_str_function = str will convert an integer to a string. Defaults to tksheet.to_str.
invalid_value (any) the value to return if the input string is invalid. For example, invalid_value = "NA" will return "NA" if the input string is invalid.
nullable (bool) if true, the formatter will accept None as a valid input.
pre_format_function (function) a function that takes a input string and returns a string. This function is called before the format_function and can be used to modify the input string before it is converted to the desired datatype. This can be useful if you want to strip out unwanted characters or convert a string to a different format before converting it to the desired datatype.
post_format_function (function) a function that takes a value which might not be of the desired datatype, e.g. None if the cell is nullable and empty and if successful returns a value of the desired datatype or if not successful returns the input value. This function is called after the format_function and can be used to modify the output value after it is converted to the desired datatype. This can be useful if you want to round a float for example.
clipboard_function (function) a function that takes a value of the desired datatype and returns a string. This function is called when the cell value is copied to the clipboard. This can be useful if you want to convert a value to a different format before it is copied to the clipboard.
**kwargs any additional keyword options/arguements to pass to the formatter. These keyword arguments will be passed to the format_function, to_str_function, and the clipboard_function. These can be useful if you want to specifiy any additional formatting options, such as the number of decimal places to round to.

Datetime Formatters and Designing Your Own Custom Formatters

tksheet is at the moment a dependency free library and so doesn't include a datetime parser as is.

You can however very easily make a datetime parser if you are willing to install a third-party package. Recommended are:

dateparser
dateutil

Both of these packages have a very comprehensive datetime parser which can be used to create a custom datetime formatter for tksheet.

Below is a simple example of how you might create a custom datetime formatter using the dateutil package.

from tksheet import *
from datetime import datetime, date
from dateutil.parser import parse

def to_local_datetime(dt, **kwargs):
'''
Our custom format_function, converts a string or a date to a datetime object in the local timezone.
'''
if isinstance(dt, datetime):
pass # Do nothing
elif isinstance(dt, date):
dt = datetime(dt.year, dt.month, dt.day) # Always good to account for unexpected inputs
else:
try:
dt = parser.parse(dt)
except:
raise ValueError(f"Could not parse {dt} as a datetime")
if dt.tzinfo is None:
dt = dt.replace(tzinfo = tzlocal()) # If no timezone is specified, assume local timezone
dt = dt.astimezone(tzlocal()) # Convert to local timezone
return dt

def datetime_to_str(dt, **kwargs):
'''
Our custom to_str_function, converts a datetime object to a string with a format that can be specfied in kwargs.
'''
return dt.strftime(kwargs['format'])
Now we can create our custom formatter dictionary from the generic formatter interface in tksheet

datetime_formatter = formatter(datatypes = datetime,
format_function = to_local_datetime,
to_str_function = datetime_to_str,
invalid_value = "NaT",
format = "%d/%m/%Y %H:%M:%S",
)
From here we can pass our datetime_formatter into sheet.format() or span.format() just like any other formatter

For those wanting even more customisation of their formatters you also have the option of creating a custom formatter class. This is a more advanced topic and is not covered here, but it's recommended to create a new class which is a subclass of the tksheet.Formatter class and overriding the methods you would like to customise. This custom class can then be passed into the format_cells() formatter_class argument.
Hiding Columns

Note that once you have hidden columns you can use the function displayed_column_to_data(column) to retrieve a column data index from a displayed index.
Display only certain columns

display_columns(
columns: None | Literal["all"] | Iterator[int] = None,
all_columns_displayed: None | bool = None,
reset_col_positions: bool = True,
refresh: bool = False,
redraw: bool = False,
deselect_all: bool = True,
**kwargs,
) -> list[int] | None

Parameters:

columns (int, iterable, "all") are the columns to be displayed, omit the columns to be hidden.
Use argument True with all_columns_displayed to display all columns, use False to display only the columns you've set using the columns arg.
You can also use the keyword argument all_displayed instead of all_columns_displayed.

Examples:
display all columns

self.sheet.display_columns("all")
displaying specific columns only

self.sheet.display_columns([2, 4, 7], all_displayed = False)

Get all columns displayed boolean

Get the bool

@property
all_columns()

e.g. get_all_columns_displayed = sheet.all_columns.

Set the bool

@all_columns.setter
all_columns(a: bool)

e.g. sheet.all_columns = True.

all_columns_displayed(a: bool | None = None) -> bool

a (bool, None) Either set by using bool or get by leaving None e.g. all_columns_displayed().

Hide specific columns

hide_columns(
columns: int | set | Iterator[int] = set(),
redraw: bool = True,
deselect_all: bool = True,
data_indexes: bool = False,
) -> Sheet

Parameters:

NOTE: columns (int) by default uses displayed column indexes, not data indexes. In other words the indexes of the columns displayed on the screen are the ones that are hidden, this is useful when used in conjunction with get_selected_columns().
data_indexes when False it makes the columns parameter indexes represent displayed columns and not the underlying Sheet data columns. When True the indexes represent data indexes.

Example:

columns_to_hide = set(sheet.data_c(c) for c in sheet.get_selected_columns())
sheet.hide_columns(
columns_to_hide,
data_indexes=True,
)

Unhide specific columns

show_columns(
columns: int | Iterator[int],
redraw: bool = True,
deselect_all: bool = True,
) -> Sheet

Parameters:

NOTE: columns (int) uses data column indexes, not displayed indexes. In other words the indexes of the columns which represent the underlying data are shown.

Notes:

Will return if all columns are currently displayed (Sheet.all_columns).

Example:
converting displayed column indexes to data indexes using data_c(c)

columns = set(sheet.data_c(c) for c in sheet.get_selected_columns())
hiding columns

sheet.hide_columns(
columns,
data_indexes=True,
)
showing them again

sheet.show_columns(columns)

Displayed column index to data

Convert a displayed column index to a data index. If the internal all_columns_displayed attribute is True then it will simply return the provided argument.

displayed_column_to_data(c)
data_c(c)

Get currently displayed columns

@property
displayed_columns() -> list[int]

e.g. columns = sheet.displayed_columns

Hiding Rows

Note that once you have hidden rows you can use the function displayed_row_to_data(row) to retrieve a row data index from a displayed index.
Display only certain rows

display_rows(
rows: None | Literal["all"] | Iterator[int] = None,
all_rows_displayed: None | bool = None,
reset_row_positions: bool = True,
refresh: bool = False,
redraw: bool = False,
deselect_all: bool = True,
**kwargs,
) -> list[int] | None

Parameters:

rows (int, iterable, "all") are the rows to be displayed, omit the rows to be hidden.
Use argument True with all_rows_displayed to display all rows, use False to display only the rows you've set using the rows arg.
You can also use the keyword argument all_displayed instead of all_rows_displayed.

Examples:

An example of row filtering using this function can be found here.
More examples below:

display all rows

self.sheet.display_rows("all")
display specific rows only

self.sheet.display_rows([2, 4, 7], all_displayed = False)

Hide specific rows

hide_rows(
rows: int | set | Iterator[int] = set(),
redraw: bool = True,
deselect_all: bool = True,
data_indexes: bool = False,
) -> Sheet

Parameters:

NOTE: rows (int) by default uses displayed row indexes, not data indexes. In other words the indexes of the rows displayed on the screen are the ones that are hidden, this is useful when used in conjunction with get_selected_rows().
data_indexes when False it makes the rows parameter indexes represent displayed rows and not the underlying Sheet data rows. When True the indexes represent data indexes.

Example:

rows_to_hide = set(sheet.data_r(r) for r in sheet.get_selected_rows())
sheet.hide_rows(
rows_to_hide,
data_indexes=True,
)

Unhide specific rows

show_rows(
rows: int | Iterator[int],
redraw: bool = True,
deselect_all: bool = True,
) -> Sheet

Parameters:

NOTE: rows (int) uses data row indexes, not displayed indexes. In other words the indexes of the rows which represent the underlying data are shown.

Notes:

Will return if all rows are currently displayed (Sheet.all_rows).

Example:
converting displayed row indexes to data indexes using data_r(r)

rows = set(sheet.data_r(r) for r in sheet.get_selected_rows())
hiding rows

sheet.hide_rows(
rows,
data_indexes=True,
)
showing them again

sheet.show_rows(rows)

Get or set the all rows displayed boolean

Get the bool

@property
all_rows()

e.g. get_all_rows_displayed = sheet.all_rows.

Set the bool

@all_rows.setter
all_rows(a: bool)

e.g. sheet.all_rows = True.

all_rows_displayed(a: bool | None = None) -> bool

a (bool, None) Either set by using bool or get by leaving None e.g. all_rows_displayed().

Displayed row index to data

Convert a displayed row index to a data index. If the internal all_rows_displayed attribute is True then it will simply return the provided argument.

displayed_row_to_data(r)
data_r(r)

Get currently displayed rows

@property
displayed_rows() -> list[int]

e.g. rows = sheet.displayed_rows

Python 3.12 Code: import ctypes
import csv
import json
import re
import tkinter as tk
from pathlib import Path
from tkinter import filedialog, messagebox, simpledialog, ttk
from typing import Any, Optional

from tksheet import Sheet

def set_dpi_awareness():
"""Enable DPI awareness for high DPI settings."""
try:
ctypes.windll.shcore.SetProcessDpiAwareness(1)
except Exception as e:
print(f"Error setting DPI awareness: {e}")

def custom_filter_design(master, style: ttk.Style, headers=None, filter_types=None, filter_font=None, filter_combobox_font=None, colors=None):
"""Creates a custom filter frame with all components."""
filter_frame = ttk.Frame(master, style="Custom.TFrame")

# Configure styles
style.configure("Custom.TFrame", background=colors["background"], relief="flat", borderwidth=0)
style.configure("TCombobox", relief="flat", borderwidth=0, background=colors["background"], fieldbackground=colors["background"])
style.map("TCombobox", fieldbackground=[('readonly', colors["background"])], background=[('readonly', colors["background"])])
style.configure("TEntry", relief="flat", borderwidth=0, background=colors["background"])
style.configure("Line.TFrame", background=colors["filter_line"])

# Create widgets
header_combobox = ttk.Combobox(filter_frame, values=headers, width=15, font=filter_combobox_font, state="readonly")
filtertype_combobox = ttk.Combobox(filter_frame, values=filter_types, width=15, font=filter_combobox_font, state="readonly")
filter_entry = ttk.Entry(filter_frame, font=filter_font)
underline = ttk.Frame(filter_frame, height=1, style="Line.TFrame")

# Layout widgets
header_combobox.grid(row=0, column=0, padx=(0, 30), pady=2, sticky='ew')
filtertype_combobox.grid(row=0, column=1, padx=2, pady=2, sticky='ew')
filter_entry.grid(row=1, column=0, columnspan=2, padx=2, pady=(2, 0), sticky='ew')
underline.grid(row=2, column=0, columnspan=2, sticky='ew', pady=(0, 2))

# Prevent text selection in comboboxes
for combobox in (header_combobox, filtertype_combobox):
    combobox.bind("<FocusIn>", lambda event: event.widget.selection_clear())

# Configure column weights
filter_frame.columnconfigure((0, 1), weight=1)

# Ensure the underline doesn't resize vertically
underline.pack_propagate(False)

return filter_frame, header_combobox, filtertype_combobox, filter_entry

def custom_scrollbar_design(style: ttk.Style, colors=None):
"""Configure custom scrollbar style."""
style.configure("Custom.Vertical.TScrollbar", troughcolor=colors["scrollbar_trough"], background=colors["scrollbar_background"], borderwidth=0, arrowcolor=colors["scrollbar_arrow"])
style.map("Custom.Vertical.TScrollbar", background=[('active', colors["scrollbar_active"])])
style.layout("Custom.Vertical.TScrollbar", [('Vertical.Scrollbar.trough', {'children': [('Vertical.Scrollbar.thumb', {'expand': '1', 'sticky': 'ns'})], 'sticky': 'ns'})])

class TableApp:
"""Table Editor with sidebar and table management."""

def __init__(self, root: tk.Tk):
    """Initialize the TableApp."""
    self.root = root
    self.config_dimensions()
    self.config_fonts()
    self.config_colors()
    self.initialize_data()
    self.style = ttk.Style()
    self.style.theme_use("default")
    self.setup_ui()
    self.load_tables()

def config_dimensions(self):
    """Configure app dimensions."""
    self.root.title("Database")
    self.root.geometry("1920x1080")
    self.root.minsize(1435, 910)
    self.dimensions = {
        "sidebar_width": 400,
        "spacer_frame_width": 100,
        "header_height": 190,
        "separator_height": 1,
    }

def config_fonts(self):
    """Configure app fonts."""
    self.fonts = {
        "text": ("Literata", 12),
        "tksheet": ("Literata", 12, "normal"),
        "header_info": ("Literata", 10),
        "filter": ("Literata", 12),
        "filter_combobox": ("Literata", 8),
    }

def config_colors(self):
    """Configure app colors."""
    self.colors = {
        "text": "#333333",
        "background": "#FFFFFF",
        "sidebar": "#F7F8FC",
        "button": "#F7F8FC",
        "button_selected": "#EAEDEF",
        "separator": "#333333",
        "header_info": "#999999",
        "scrollbar_trough": "#F7F8FC",
        "scrollbar_background": "#c0c1c4",
        "scrollbar_arrow": "#333333",
        "scrollbar_active": "#878789",
        "filter_line": "#00bcf0",
    }

def setup_ui(self):
    """Set up the user interface with a 3x2 grid layout."""
    self.root.grid_rowconfigure(0, weight=0)
    self.root.grid_rowconfigure(1, weight=1)

    self.root.grid_columnconfigure(0, weight=0)
    self.root.grid_columnconfigure(1, weight=0, minsize=self.dimensions["spacer_frame_width"])
    self.root.grid_columnconfigure(2, weight=3)

    self.create_sidebar()
    self.create_header_frame()
    self.create_spacer_frame()
    self.create_table_frame()

def create_sidebar(self):
    """Create the sidebar that spans both rows."""
    sidebar = self._create_frame(
        parent=self.root,
        width=self.dimensions["sidebar_width"],
        bg=self.colors["sidebar"]
    )
    sidebar.grid(row=0, column=0, rowspan=2, sticky='ns')
    sidebar.grid_propagate(False)
    sidebar.columnconfigure(0, weight=1)
    sidebar.rowconfigure(0, weight=1)

    functional_sidebar = self._create_frame(
        parent=sidebar,
        width=self.dimensions["sidebar_width"],
        bg=self.colors["sidebar"]
    )
    functional_sidebar.grid(row=0, column=0, sticky='nsew')
    functional_sidebar.columnconfigure(0, weight=1)
    functional_sidebar.rowconfigure(0, weight=0)
    functional_sidebar.rowconfigure(1, weight=1)
    functional_sidebar.rowconfigure(2, weight=0)

    self._add_normal_buttons(functional_sidebar)
    self._add_scrollable_canvas(functional_sidebar)
    self._add_delete_table_section(functional_sidebar)

def create_header_frame(self) -> None:
    """Create the header divided into upper and lower sub-frames."""
    header_frame = self._create_and_configure_header_frame()
    
    upper_header_frame = self._create_upper_header(header_frame)
    self._create_upper_header_content(upper_header_frame)
    
    lower_header_frame = self._create_lower_header(header_frame)
    self._create_filter_controls(lower_header_frame)

def _create_and_configure_header_frame(self) -> tk.Frame:
    """Create and configure the main header frame."""
    header_frame = self._create_frame(parent=self.root, width=None, bg=self.colors["background"])
    header_frame.grid(row=0, column=1, columnspan=2, sticky='ew')
    header_frame.config(height=self.dimensions["header_height"])
    header_frame.grid_propagate(False)
    
    for i in range(2):
        header_frame.grid_rowconfigure(i, weight=0)
    
    for i in range(5):
        weight = 1 if i == 4 else 0
        header_frame.grid_columnconfigure(i, weight=weight)
    
    return header_frame

def _create_upper_header(self, parent: tk.Frame) -> tk.Frame:
    """Create the upper header frame."""
    upper_header = self._create_frame(parent=parent, width=None, bg=self.colors["background"])
    upper_header.grid(row=0, column=0, columnspan=5, sticky='ew', pady=(0, 10))
    upper_header.grid_columnconfigure(5, weight=1)
    return upper_header

def _create_upper_header_content(self, upper_header: tk.Frame) -> None:
    """Create and add content to the upper header frame."""
    self._create_data_label(upper_header)
    self._create_table_name_label(upper_header)
    self._create_settings_label(upper_header)

def _create_data_label(self, parent: tk.Frame) -> None:
    """Create and grid the 'Data >' label."""
    data_label = tk.Label(
        parent,
        text="Data > ",
        bg=self.colors["background"],
        fg=self.colors["header_info"],
        font=self.fonts["header_info"]
    )
    data_label.grid(row=0, column=0, padx=22, pady=(22, 0), sticky='nw')

def _create_table_name_label(self, parent: tk.Frame) -> None:
    """Create and grid the table name label."""
    self.table_name_label = tk.Label(
        parent,
        text=self.current_table_name if self.current_table_name else "No Table Selected",
        bg=self.colors["background"],
        fg=self.colors["text"],
        font=self.fonts["header_info"]
    )
    self.table_name_label.grid(row=0, column=0, padx=(88, 10), pady=(22, 0), sticky='nw')

def _create_settings_label(self, parent: tk.Frame) -> None:
    """Create and grid the settings label with its associated menu."""
    settings_label = tk.Label(
        parent,
        text="...",
        bg=self.colors["background"],
        fg=self.colors["text"],
        cursor="hand2",
        anchor='e',
        font=self.fonts["text"]
    )
    settings_label.grid(row=0, column=5, padx=40, pady=20, sticky='e')
    
    settings_menu = self._create_settings_menu()
    self._bind_settings_label_events(settings_label, settings_menu)

def _create_settings_menu(self) -> tk.Menu:
    """Create the settings dropdown menu."""
    menu = tk.Menu(self.root, tearoff=0)
    menu.add_command(label="Export Table", command=self.export_table)
    menu.add_command(label="Import Table", command=self.import_file)
    menu.add_command(label="Rename Headers", command=self.rename_headers)
    return menu

def _bind_settings_label_events(self, label: tk.Label, menu: tk.Menu) -> None:
    """Bind events to the settings label."""
    label.bind("<Button-1>", lambda e: menu.post(e.x_root, e.y_root))
    label.bind("<Enter>", lambda _: label.config(bg=self.colors["button_selected"]))
    label.bind("<Leave>", lambda _: label.config(bg=self.colors["background"]))

def _create_lower_header(self, parent: tk.Frame) -> tk.Frame:
    """Create the lower header frame."""
    lower_header = self._create_frame(parent=parent, width=None, bg=self.colors["background"])
    lower_header.grid(row=1, column=0, columnspan=5, sticky='ew')
    return lower_header

def _create_filter_controls(self, parent: tk.Frame) -> None:
    """Create and add filter controls to the lower header frame."""
    self._create_filter_label(parent)
    filter_frame, self.filter_header_dropdown, self.filter_option_dropdown, self.filter_text_entry = custom_filter_design(parent, self.style, headers=["All"] + self.headers.get(self.current_table_name, []), filter_types=[
        "is", "is not", "contains", "does not contain",
        "starts with", "ends with", "is empty", "is not empty"
    ], filter_font=self.fonts["filter"], filter_combobox_font=self.fonts["filter_combobox"], colors=self.colors)
    filter_frame.grid(row=0, column=1, columnspan=4, padx=0, pady=0, sticky='ew')

    self.filter_header_var.set("All")
    self.filter_option_var.set("contains")
    self.filter_text_var.set("")

    self.filter_header_dropdown['textvariable'] = self.filter_header_var
    self.filter_option_dropdown['textvariable'] = self.filter_option_var
    self.filter_text_entry['textvariable'] = self.filter_text_var

    self.filter_header_dropdown.bind("<<ComboboxSelected>>", self.apply_filter)
    self.filter_option_dropdown.bind("<<ComboboxSelected>>", lambda event: [self.update_filter_text_state(event), self.apply_filter()])
    self.filter_text_entry.bind("<KeyRelease>", self.apply_filter)
    self.filter_text_entry.bind("<Return>", self.apply_filter)
    
def _create_filter_label(self, parent: tk.Frame) -> None:
    filter_label = tk.Label(parent, text="Filter: ", bg=self.colors["background"], fg=self.colors["text"])
    filter_label.grid(row=0, column=0, padx=(100, 0), pady=20, sticky='e')

def update_filter_text_state(self, event=None):
    """Enable or disable the filter text entry based on filter option."""
    option = self.filter_option_var.get()
    if option in ["is empty", "is not empty"]:
        self.filter_text_var.set("")
        self.filter_text_entry.config(state='disabled')
        self.apply_filter()
    else:
        self.filter_text_entry.config(state='normal')

def create_spacer_frame(self):
    """Create a spacer frame in column 1, row 1."""
    spacer = self._create_frame(
        parent=self.root,
        width=self.dimensions["spacer_frame_width"],
        bg=self.colors["background"]
    )
    spacer.grid(row=1, column=1, sticky='nsew')
    spacer.grid_propagate(False)

def create_table_frame(self):
    """Create the table frame in column 2, row 1."""
    self.table_frame = self._create_frame(
        parent=self.root,
        width=None,
        bg=self.colors["background"]
    )
    self.table_frame.grid(row=1, column=2, sticky='nsew')
    self.table_frame.grid_rowconfigure(0, weight=1)
    self.table_frame.grid_columnconfigure(0, weight=1)

def _create_frame(
    self,
    parent: tk.Widget,
    width: Optional[int],
    bg: str
) -> tk.Frame:
    """Create a frame with specified width and background."""
    frame = tk.Frame(parent, width=width, bg=bg, bd=0, relief='flat')
    if width:
        frame.config(width=width)
    return frame

def _add_normal_buttons(self, sidebar: tk.Frame):
    """Add buttons to the sidebar."""
    normal_buttons_frame = self._create_frame(
        parent=sidebar,
        width=self.dimensions["sidebar_width"],
        bg=self.colors["sidebar"]
    )
    normal_buttons_frame.grid(row=0, column=0, sticky='ew', padx=10, pady=(10, 0))
    normal_buttons_frame.columnconfigure(0, weight=1)

    create_table_label = self._create_clickable_label(
        parent=normal_buttons_frame,
        text="Create New Table",
        command=self.create_new_table,
        anchor='center'
    )
    create_table_label.grid(row=0, column=0, pady=10, sticky='ew')
    self.add_custom_hover(create_table_label)

    separator = tk.Frame(normal_buttons_frame, height=self.dimensions["separator_height"], bg=self.colors["separator"])
    separator.grid(row=1, column=0, sticky='ew', pady=5)

def _on_canvas_configure(self, event):
    """Update the table_labels_frame width to match the canvas width."""
    self.canvas.itemconfig(self.table_labels_window, width=event.width)

def _add_scrollable_canvas(self, sidebar: tk.Frame):
    """Add scrollable canvas for table labels within a single frame."""
    scrollable_container = self._create_frame(
        parent=sidebar,
        width=self.dimensions["sidebar_width"],
        bg=self.colors["sidebar"]
    )
    scrollable_container.grid(row=1, column=0, sticky='nsew', padx=10, pady=10)
    scrollable_container.columnconfigure(0, weight=1)
    scrollable_container.rowconfigure(0, weight=1)

    self.canvas = tk.Canvas(
        scrollable_container,
        bg=self.colors["sidebar"],
        highlightthickness=0
    )
    self.canvas.grid(row=0, column=0, sticky='nsew')

    custom_scrollbar_design(self.style, self.colors) 

    self.scrollbar = ttk.Scrollbar(
        scrollable_container,
        orient="vertical",
        command=self.canvas.yview,
        style="Custom.Vertical.TScrollbar"
    )
    self.scrollbar.grid(row=0, column=1, sticky='ns')

    self.canvas.configure(yscrollcommand=self.scrollbar.set)

    self.table_labels_frame = tk.Frame(self.canvas, bg=self.colors["sidebar"])
    
    # Capture the window item ID
    self.table_labels_window = self.canvas.create_window((0, 0), window=self.table_labels_frame, anchor="nw", width=self.dimensions["sidebar_width"])

    self.canvas.bind("<MouseWheel>", self._on_mouse_wheel)
    self.table_labels_frame.bind("<MouseWheel>", self._on_mouse_wheel)

    self.table_labels_frame.bind(
        "<Configure>",
        lambda event: (
            self.canvas.configure(scrollregion=self.canvas.bbox("all")),
            self._update_scrollbar(scrollable_container, self.canvas, self.scrollbar)
        )
    )
    scrollable_container.bind(
        "<Configure>",
        lambda event: self._update_scrollbar(scrollable_container, self.canvas, self.scrollbar)
    )

    # Bind the canvas resize to update the table_labels_frame width
    self.canvas.bind('<Configure>', self._on_canvas_configure)

def _on_mouse_wheel(self, event):
    """Handle mouse wheel scrolling only if scrollbar is visible."""
    if self.scrollbar.winfo_viewable():
        self.canvas.yview_scroll(int(-1 * (event.delta / 120)), "units")

def _update_scrollbar(self, scrollbar_frame, canvas, scrollbar):
    """Update scrollbar visibility based on content size."""
    canvas.update_idletasks()
    canvas_height = scrollbar_frame.winfo_height()
    content_height = self.table_labels_frame.winfo_reqheight()

    if content_height > canvas_height:
        scrollbar.grid()
        canvas.configure(yscrollcommand=scrollbar.set)
        canvas.bind("<MouseWheel>", lambda event: canvas.yview_scroll(int(-1 * (event.delta / 120)), "units"))
    else:
        scrollbar.grid_remove()
        canvas.configure(yscrollcommand=lambda *args: None)
        canvas.unbind("<MouseWheel>")

def _add_delete_table_section(self, sidebar: tk.Frame):
    """Add delete table option to the sidebar."""
    delete_table_frame = self._create_frame(
        parent=sidebar,
        width=self.dimensions["sidebar_width"],
        bg=self.colors["sidebar"]
    )
    delete_table_frame.grid(row=2, column=0, sticky='ew', padx=10, pady=(0, 10))
    delete_table_frame.columnconfigure(0, weight=1)
    delete_table_frame.rowconfigure(1, weight=1)

    separator = tk.Frame(delete_table_frame, height=self.dimensions["separator_height"], bg=self.colors["separator"])
    separator.grid(row=0, column=0, sticky='ew', pady=5)

    delete_table_label = self._create_clickable_label(
        parent=delete_table_frame,
        text="🗑 Delete Selected Table",
        command=self.delete_table,
        anchor='center'
    )
    delete_table_label.grid(row=1, column=0, pady=10, sticky='ew')
    self.add_custom_hover(delete_table_label)

def _create_clickable_label(
    self,
    parent: tk.Widget,
    text: str,
    command,
    allow_rename: bool = False,
    anchor: str = 'w'
) -> tk.Label:
    """Create a clickable label with optional rename functionality."""
    cursor = "arrow" if allow_rename else "hand2"
    label = tk.Label(
        parent,
        text=text,
        bg=self.colors["button"],
        fg=self.colors["text"],
        cursor=cursor,
        anchor=anchor,
        font=self.fonts["text"]
    )
    label.bind("<Button-1>", lambda _: command())

    if allow_rename:
        label.bind("<Double-Button-1>", lambda _: self.begin_rename(text))

    label.bind("<MouseWheel>", self._on_mouse_wheel)

    return label

def add_custom_hover(self, widget: tk.Widget):
    """Add custom hover effects to a widget."""
    widget.bind("<Enter>", lambda e: widget.config(bg=self.colors["button_selected"]))
    widget.bind("<Leave>", lambda e: widget.config(bg=self.colors["button"]))

def initialize_data(self):
    """Initialize data structures."""
    self.save_file_path = Path(__file__).parent / "Data.json"
    self.tables_data: dict[str, dict] = {}
    self.current_sheet: Sheet | None = None
    self.headers: dict[str, list[str]] = {}
    self.current_table_name: str | None = None
    self.rename_entry: tk.Entry | None = None
    self.selected_table_label: tk.Label | None = None
    self.table_labels: dict[str, tk.Label] = {}
        
    self.table_name_label = None

    self.filter_header_var = tk.StringVar(value="All")
    self.filter_option_var = tk.StringVar(value="contains")
    self.filter_text_var = tk.StringVar()

    # Added: Initialize displayed_row_indices
    self.displayed_row_indices: list[int] = []

def sort_table_labels(self):
        """Sort table labels with numeric names first, then alphabetic, then alphanumeric."""
        def sort_key(name):
            # Category 1: Starts with digits (e.g., "1. Movies")
            m = re.match(r'^(\d+)', name)
            if m:
                return (1, int(m.group(1)))
            
            # Category 3: Starts with letters followed by digits (e.g., "T1", "T2")
            m = re.match(r'^([A-Za-z]+)(\d+)', name)
            if m:
                return (3, m.group(1).lower(), int(m.group(2)))
            
            # Category 2: Starts with letters only (e.g., "a", "b", "c")
            m = re.match(r'^([A-Za-z]+)', name)
            if m:
                return (2, m.group(1).lower())
            
            # Category 4: Any other names
            return (4, name.lower())
        
        # Sort the table names using the defined sort key
        sorted_tables = sorted(self.tables_data.keys(), key=sort_key)
        
        # Re-pack the labels in the sorted order
        for table_name in sorted_tables:
            label = self.table_labels.get(table_name)
            if label:
                label.pack_forget()
                label.pack(fill='x', padx=0, pady=5, expand=True)

def create_new_table(self):
    """Create a new table."""
    existing_numbers = [int(name.split(" ")[1]) for name in self.tables_data if name.startswith("Table ") and name.split(" ")[1].isdigit()]
    next_number = max(existing_numbers, default=0) + 1
    table_name = f"Table {next_number}"
    self.add_table(table_name)
    self.load_selected_table(table_name)

def import_file(self):
    """Import table from file."""
    file_path = filedialog.askopenfilename(title="Import File", filetypes=[("All Supported Files", "*.json *.csv"), ("JSON files", "*.json"), ("CSV files", "*.csv")])
    if not file_path:
        return
    try:
        if file_path.endswith('.csv'):
            with open(file_path, newline='', encoding='utf-8') as csvfile:
                data = list(csv.reader(csvfile))
        elif file_path.endswith('.json'):
            with open(file_path, 'r', encoding='utf-8') as jsonfile:
                data = json.load(jsonfile)
        else:
            raise ValueError("Unsupported file format.")
        if not data or not isinstance(data, list) or not all(isinstance(row, list) for row in data):
            raise ValueError("Invalid data format in the file.")
        headers, table_data = data[0], data[1:]
        self.add_table_from_data(file_path, headers, table_data)
    except Exception as e:
        messagebox.showerror("File Import Error", str(e))

def add_table_from_data(self, file_path: str, headers: list[str], table_data: list[list[str]]):
    """Add a table from file data."""
    table_name = Path(file_path).stem
    table_name = self.ensure_unique_table_name(table_name)
    self.add_table(table_name, data=table_data, headers=headers)
    self.load_selected_table(table_name)
    self.save_data()

def ensure_unique_table_name(self, table_name: str) -> str:
    """Ensure table name is unique."""
    original_name = table_name
    counter = 1
    while table_name in self.tables_data:
        table_name = f"{original_name} (New {counter})"
        counter += 1
    return table_name

def save_table_data(self, file_path: str, data: list[list[str]], format: str):
    """Save table data in specified format."""
    match format:
        case 'csv':
            with open(file_path, 'w', newline='', encoding='utf-8') as file:
                csv.writer(file).writerows(data)
        case 'json':
            with open(file_path, 'w', encoding='utf-8') as file:
                json.dump(data, file, indent=4)
        case _:
            raise ValueError("Unsupported file format.")

def export_table(self):
    """Export current table to file."""
    if not self.current_table_name or self.current_table_name not in self.tables_data:
        messagebox.showwarning("No Table Selected", "Please select a table to export.")
        return
    file_path = filedialog.asksaveasfilename(title="Export File", defaultextension=".json", filetypes=[("JSON files", "*.json"), ("CSV files", "*.csv")], initialfile=self.current_table_name)
    if not file_path:
        return
    try:
        data = [self.headers[self.current_table_name]] + self.tables_data[self.current_table_name]["data"]
        if file_path.endswith('.csv'):
            self.save_table_data(file_path, data, 'csv')
        elif file_path.endswith('.json'):
            with open(file_path, 'w', encoding='utf-8') as file:
                json.dump(data, file, indent=4)
        else:
            raise ValueError("Unsupported file format.")
        self.save_data()
        messagebox.showinfo("Export Successful", f"Table '{self.current_table_name}' has been exported successfully.")
    except Exception as e:
        messagebox.showerror("Export Failed", f"An error occurred during export: {e}")

def add_table(self, table_name: str, data: list[list[str]] | None = None, headers: Optional[list[str]] = None):
    """Add a new table."""
    if headers:
        self.headers[table_name] = headers
    else:
        default_headers = ["Column 1", "Column 2", "Column 3", "Column 4", "Column 5"]
        self.headers[table_name] = default_headers
    self.tables_data[table_name] = {"headers": self.headers[table_name], "data": data or [["" for _ in range(len(self.headers[table_name]))] for _ in range(10)]}
    self.create_table_label(table_name)
    self.save_data()

def create_table_label(self, table_name: str):
    """Create label for table."""
    label = self._create_clickable_label(self.table_labels_frame, table_name, lambda: self.load_selected_table(table_name), True)
    label.pack(fill='x', padx=0, pady=5, expand=True)
    self.table_labels[table_name] = label
    self.add_custom_hover(label)
    self.sort_table_labels()

def delete_table(self):
    """Delete selected table."""
    if not self.current_table_name or self.current_table_name not in self.tables_data:
        messagebox.showwarning("No Table Selected", "Please select a valid table to delete.")
        return
    if messagebox.askyesno("Delete Table", f"Are you sure you want to delete the table '{self.current_table_name}'?"):
        self.remove_table(self.current_table_name)

def on_columns_deleted(self, event):
    """Handle column deletion and update filter headers."""
    if not self.current_table_name or not self.current_sheet:
        return
    new_headers = self.current_sheet.headers()
    self.headers[self.current_table_name] = new_headers
    self.filter_header_dropdown['values'] = ["All"] + new_headers
    self.filter_header_var.set("All")
    self.filter_option_var.set("contains")
    self.filter_text_var.set("")
    self.filter_text_entry.config(state='normal')
    self.apply_filter()

def remove_table(self, table_name: str):
    """Remove a table."""
    if self.current_table_name == table_name and self.current_sheet:
        self.current_sheet.destroy()
        self.current_sheet = None
    label = self.table_labels.get(table_name)
    if label:
        label.destroy()
    if table_name in self.tables_data:
        del self.tables_data[table_name]
    if table_name in self.headers:
        del self.headers[table_name]
    if table_name in self.table_labels:
        del self.table_labels[table_name]
    self.current_table_name = None
    self.selected_table_label = None
    self.save_data()
    self.sort_table_labels()

def load_tables(self):
    """Load tables from file."""
    if not self.save_file_path.exists():
        return
    try:
        with self.save_file_path.open('r', encoding='utf-8') as file:
            all_data = json.load(file)
    except Exception as e:
        messagebox.showerror("Load Error", f"Failed to load tables: {e}")
        return
    for table_name, data in all_data.items():
        if not isinstance(data, list) or not data:
            continue
        headers, table_data = data[0], data[1:]
        self.headers[table_name] = headers
        self.tables_data[table_name] = {"headers": headers, "data": table_data}
        self.create_table_label(table_name)
    self.sort_table_labels()

def load_selected_table(self, table_name: str):
    """Display selected table."""
    if self.current_sheet:
        self.current_sheet.pack_forget()
        self.current_sheet.destroy()
        self.current_sheet = None
    if self.selected_table_label:
        try:
            self.selected_table_label.config(bg=self.colors["button"])
        except tk.TclError:
            self.selected_table_label = None

    if table_name not in self.tables_data:
        messagebox.showerror("Error", f"Table '{table_name}' does not exist.")
        self.current_table_name = None
        self.selected_table_label = None
        return

    table_info = self.tables_data[table_name]
    headers = table_info["headers"]
    data = table_info["data"]
    try:
        sheet = Sheet(
            self.table_frame,
            data=data,
            show_table=True,
            headers=headers,
            font=self.fonts["tksheet"],
            header_font=self.fonts["tksheet"],
            auto_resize_columns=True
        )
        sheet.set_options(table_fg=self.colors["text"], header_fg=self.colors["text"])
        sheet.enable_bindings()
        sheet.extra_bindings([
            ("end_edit_cell", self.on_cell_edit),
            ("end_delete_columns", self.on_columns_deleted)  # Added binding for column deletion
        ])
        sheet.pack(expand=True, fill='both')
        self.current_sheet = sheet
        self.current_table_name = table_name

        if self.table_name_label:
            self.table_name_label.config(text=self.current_table_name)
        else:
            self.table_name_label = tk.Label(
                self.root,
                text=self.current_table_name,
                bg=self.colors["background"],
                fg=self.colors["text"],
                font=self.fonts["header_info"]
            )
            self.table_name_label.grid(row=0, column=0, padx=(60, 10), pady=(5, 0), sticky='nw')

        label = self.table_labels.get(table_name)
        if label:
            self.selected_table_label = label
            try:
                self.selected_table_label.config(bg=self.colors["button_selected"])
            except tk.TclError:
                self.selected_table_label = None
                messagebox.showerror("Error", f"Failed to update the label for '{table_name}'.")
        else:
            self.selected_table_label = None
            messagebox.showerror("Error", f"Label for '{table_name}' not found.")
        
        self.filter_header_var.set("All")
        self.filter_header_dropdown['values'] = ["All"] + headers
        
        self.filter_option_var.set("contains")
        self.update_filter_text_state()
        
        self.apply_filter()
    except Exception as e:
        messagebox.showerror("Sheet Error", f"Failed to load table '{table_name}': {e}")
        self.current_table_name = None
        self.selected_table_label = None

def on_cell_edit(self, event=None):
    """Handle cell edits."""
    if self.current_table_name and self.current_sheet:
        sheet_data = self.current_sheet.get_sheet_data()
        for idx, row in enumerate(sheet_data):
            if idx < len(self.displayed_row_indices):
                data_idx = self.displayed_row_indices[idx]
                self.tables_data[self.current_table_name]["data"][data_idx] = row
            else:
                # Added: Handle new rows by appending to the underlying data
                self.tables_data[self.current_table_name]["data"].append(row)
        self.save_data()

def save_data(self):
    """Save all tables data."""
    all_data = {}
    for table_name, table_info in self.tables_data.items():
        all_data[table_name] = [table_info["headers"]] + table_info["data"]
    try:
        with self.save_file_path.open('w', encoding='utf-8') as file:
            json.dump(all_data, file, indent=4)
    except Exception as e:
        print(f"Error saving data: {e}")

def apply_filter(self, event=None):
    """Apply filter to table data based on selected criteria."""
    if not self.current_table_name or not self.current_sheet:
        return
    header = self.filter_header_var.get()
    option = self.filter_option_var.get()
    text = self.filter_text_var.get().lower()
    original_data = self.tables_data[self.current_table_name]["data"]

    def row_matches(row):
        if header == "All":
            cells = row
            target_indices = range(len(cells))
        else:
            try:
                target_indices = [self.headers[self.current_table_name].index(header)]
            except ValueError:
                return False
        
        conditions = {
            "is": lambda cell, text: cell == text,
            "is not": lambda cell, text: cell != text,
            "contains": lambda cell, text: text in cell,
            "does not contain": lambda cell, text: text not in cell,
            "starts with": lambda cell, text: cell.startswith(text),
            "ends with": lambda cell, text: cell.endswith(text),
            "is empty": lambda cell, _: cell == "",
            "is not empty": lambda cell, _: cell != ""
        }
        
        for idx in target_indices:
            cell = str(row[idx]).lower()
            if conditions.get(option, lambda _, __: False)(cell, text):
                return True
        return False

    # Collect both filtered data and their original indices
    filtered_data = []
    self.displayed_row_indices = []

    for i, row in enumerate(original_data):
        if row_matches(row):
            filtered_data.append(row)
            self.displayed_row_indices.append(i)

    try:
        self.current_sheet.set_sheet_data(filtered_data)
    except tk.TclError as e:
        print(f"Error applying filter: {e}")

def rename_headers(self):
    """Rename table headers."""
    if not self.current_table_name:
        messagebox.showwarning("No Table Selected", "Please select a table to rename headers.")
        return
    current_headers = self.headers[self.current_table_name]
    new_headers = simpledialog.askstring(
        "Rename Headers", 
        "Enter new headers (comma-separated):", 
        initialvalue=", ".join(current_headers)
    )
    if new_headers:
        header_list = [header.strip() for header in new_headers.split(',')]
        if not header_list:
            messagebox.showerror("Invalid Headers", "Header list cannot be empty.")
            return
        self.headers[self.current_table_name] = header_list
        self.tables_data[self.current_table_name]["headers"] = header_list
        if self.current_sheet:
            try:
                self.current_sheet.headers(header_list)
            except tk.TclError as e:
                messagebox.showerror("Error", f"Failed to rename headers: {e}")
        
        self.filter_header_var.set("All")
        self.filter_header_dropdown['values'] = ["All"] + header_list
        self.apply_filter()
        
        self.save_data()

def begin_rename(self, table_name: str):
    """Start renaming a table."""
    if table_name not in self.table_labels:
        messagebox.showerror("Error", f"Table '{table_name}' not found.")
        return
    label = self.table_labels[table_name]
    self.cancel_rename()
    self.rename_entry = tk.Entry(self.table_labels_frame, bg=label.cget("bg"), fg=self.colors["text"], relief='flat')
    self.rename_entry.insert(0, table_name)
    self.rename_entry.place(x=label.winfo_x(), y=label.winfo_y(), width=label.winfo_width(), height=label.winfo_height())
    self.rename_entry.focus()
    self.rename_entry.select_range(0, tk.END)
    self.rename_entry.bind('<Return>', lambda event: self.end_rename(table_name))
    self.rename_entry.bind('<FocusOut>', lambda event: self.cancel_rename())

def end_rename(self, old_name: str):
    """Finalize table renaming."""
    new_name = self.rename_entry.get().strip()
    if not new_name:
        messagebox.showerror("Invalid Name", "Table name cannot be empty.")
        self.rename_entry.focus_set()
        return
    if new_name in self.tables_data and new_name != old_name:
        messagebox.showerror("Duplicate Name", f"A table named '{new_name}' already exists.")
        self.rename_entry.focus_set()
        return
    if new_name != old_name:
        self.update_table_name(old_name, new_name)
        self.load_selected_table(new_name)
    self.cancel_rename()

def update_table_name(self, old_name: str, new_name: str):
    """Update table name and resources."""
    self.tables_data[new_name] = self.tables_data.pop(old_name)
    self.headers[new_name] = self.headers.pop(old_name)
    label = self.table_labels.pop(old_name)
    label.config(text=new_name)
    label.bind("<Button-1>", lambda event: self.load_selected_table(new_name))
    label.bind("<Double-1>", lambda event: self.begin_rename(new_name))
    self.table_labels[new_name] = label
    if self.selected_table_label == label:
        try:
            label.config(bg=self.colors["button_selected"])
        except tk.TclError:
            pass
    self.save_data()
    self.sort_table_labels()

def cancel_rename(self):
    """Cancel rename operation."""
    if self.rename_entry:
        self.rename_entry.destroy()
        self.rename_entry = None

def add_custom_hover(self, label: tk.Label):
    """Add hover effects to label."""
    def on_enter(event):
        if label != self.selected_table_label:
            try:
                label.config(bg=self.colors["button_selected"])
            except tk.TclError:
                pass

    def on_leave(event):
        if label != self.selected_table_label:
            try:
                label.config(bg=self.colors["button"])
            except tk.TclError:
                pass

    label.bind("<Enter>", on_enter)
    label.bind("<Leave>", on_leave)

if name == "main":
set_dpi_awareness()
root = tk.Tk()
app = TableApp(root)
root.mainloop()