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from tkinter import messagebox
import customtkinter as ctk
from datetime import datetime
from pathlib import Path
from gui_widgets import ItemsTable, SummaryByCategoryPivotTable
from item import ItemsDB, Category, Item
from expense_income_stats import ExcelReport, PdfReport
class App(ctk.CTk):
"""
Represents the main application for managing expenses.
This class provides a GUI application for adding, updating, and deleting expense items,
generating reports, and visualizing data.
"""
def __init__(self, db_path, *args, **kwargs):
super().__init__(*args, **kwargs)
# Configure Main Window
self.title("Expense Tracker")
self.geometry("1500x730")
# Configure Layout
self.grid_rowconfigure((0, 1, 2, 3), weight=2)
self.grid_rowconfigure(3, weight=1)
self.grid_columnconfigure((0, 1, 2), weight=1)
# ==============================================================================================================
# Table for the Expense Items
self._items_db = ItemsDB(db_path)
self.items_table = ItemsTable(self, self._items_db)
self.items_table.grid(
row=0, column=0, padx=5, pady=5, columnspan=3, sticky="nswe"
)
self.items_table.bind("<ButtonRelease-1>", self.on_row_selected)
# ==============================================================================================================
# Settings Tab
# Unfortunately, Customtkinter does not support menu bar
self.tab_view_settings = ctk.CTkTabview(self)
self.tab_view_settings.grid(row=1, column=0, padx=5, pady=5, sticky="nswe")
# Edit Tab
self.tab_view_settings.add("Edit")
button = ctk.CTkButton(
self.tab_view_settings.tab("Edit"),
text="Deselect Table",
command=lambda: self.items_table.deselect(),
)
button.pack(pady=5)
button = ctk.CTkButton(
self.tab_view_settings.tab("Edit"),
text="Update Summaries",
command=self.update_pivot_tables,
)
button.pack(pady=5)
# Report Tab
self.tab_view_settings.add("Report")
self.btn_generate_excel_report = ctk.CTkButton(
self.tab_view_settings.tab("Report"),
text="Generate Excel Report",
command=self.generate_excel_report,
)
self.btn_generate_excel_report.pack(pady=5)
self.btn_generate_pdf_report = ctk.CTkButton(
self.tab_view_settings.tab("Report"),
text="Generate PDF Report",
command=self.generate_pdf_report,
)
self.btn_generate_pdf_report.pack(pady=5)
# Set Default Tab to 'Edit'
self.tab_view_settings.set("Edit")
# ==============================================================================================================
# Frame for Buttons
self.frame_buttons = ctk.CTkFrame(self, border_color="black")
self.frame_buttons.grid(row=1, column=1, padx=5, pady=5)
# Add Button
self.btn_add_item = ctk.CTkButton(
self.frame_buttons,
text="Add",
command=self.on_btn_add_clicked,
)
self.btn_add_item.pack(padx=5, pady=5)
# Update Button
self.btn_update_item = ctk.CTkButton(
self.frame_buttons,
text="Update",
command=self.on_btn_update_clicked,
)
self.btn_update_item.pack(padx=5, pady=5)
# Delete Button
self.btn_delete_item = ctk.CTkButton(
self.frame_buttons,
text="Delete",
command=self.on_btn_delete_clicked,
)
self.btn_delete_item.pack(padx=5, pady=5)
# Clear Form Button
self.btn_clear_form = ctk.CTkButton(
self.frame_buttons,
text="Clear Form",
command=self.clear_form,
)
self.btn_clear_form.pack(padx=5, pady=5)
# ==============================================================================================================
# Frame for Form
self.frame_form = ctk.CTkFrame(self, border_color="black")
self.frame_form.grid(row=1, column=2, padx=5, pady=5, ipadx=10, sticky="nswe")
self.frame_form.grid_rowconfigure([i for i in range(6)], weight=1)
self.frame_form.grid_columnconfigure((0, 1), weight=1)
# Entry - Name
label = ctk.CTkLabel(self.frame_form, text="Name: ", fg_color="transparent")
label.grid(row=0, column=0, padx=5, pady=5, sticky="we")
self.entry_name = ctk.CTkEntry(self.frame_form, placeholder_text="Name")
self.entry_name.grid(row=0, column=1, padx=5, pady=5, sticky="we")
# Entry - Amount
label = ctk.CTkLabel(self.frame_form, text="Amount: ", fg_color="transparent")
label.grid(row=1, column=0, padx=5, pady=5, sticky="we")
self.entry_amount = ctk.CTkEntry(self.frame_form, placeholder_text="Amount")
self.entry_amount.grid(row=1, column=1, padx=5, pady=5, sticky="we")
# Entry - Description
label = ctk.CTkLabel(
self.frame_form, text="Description: ", fg_color="transparent"
)
label.grid(row=2, column=0, padx=5, pady=5, sticky="we")
self.entry_description = ctk.CTkEntry(
self.frame_form, placeholder_text="Description"
)
self.entry_description.grid(row=2, column=1, padx=5, pady=5, sticky="we")
# Entry - Date
label = ctk.CTkLabel(self.frame_form, text="Date: ", fg_color="transparent")
label.grid(row=3, column=0, padx=5, pady=5, sticky="we")
self.entry_date = ctk.CTkEntry(self.frame_form, placeholder_text="YYYY-MM-dd")
self.entry_date.grid(row=3, column=1, padx=5, pady=5, sticky="we")
# Entry - Category
label = ctk.CTkLabel(self.frame_form, text="Category: ", fg_color="transparent")
label.grid(row=4, column=0, padx=5, pady=5, sticky="we")
self.entry_category = ctk.CTkEntry(self.frame_form, placeholder_text="Category")
self.entry_category.grid(row=4, column=1, padx=5, pady=5, sticky="we")
# Entry - Subcategory
label = ctk.CTkLabel(
self.frame_form, text="Subcategory: ", fg_color="transparent"
)
label.grid(row=5, column=0, padx=5, pady=5, sticky="we")
self.entry_subcategory = ctk.CTkEntry(
self.frame_form, placeholder_text="Subcategory"
)
self.entry_subcategory.grid(row=5, column=1, padx=5, pady=5, sticky="we")
# ==============================================================================================================
# CTkTabview for Visualizations
self.tab_view_visuals = ctk.CTkTabview(self)
self.tab_view_visuals.grid(
row=2, column=0, padx=5, pady=5, columnspan=3, sticky="nswe"
)
expense_tab = self.tab_view_visuals.add(
"Summary By Category"
) # Summary By Category Tab
self.tab_view_visuals.set("Summary By Category") # set currently visible tab
# Summary By Category Tab Contents
self.pivot_table = SummaryByCategoryPivotTable(
self.tab_view_visuals.tab("Summary By Category")
)
# ==============================================================================================================
# Other Widget-Event-Callbacks Bindings
self.protocol("WM_DELETE_WINDOW", self.on_window_close)
def update_pivot_tables(self):
"""Updates the pivot tables."""
self.pivot_table.update_pivot_table()
def generate_excel_report(self):
"""Generates an Excel report."""
excel_path = str(Path(__file__).resolve().parent / "report.xlsx")
report = ExcelReport(excel_path, self._items_db)
report.generate_report()
def generate_pdf_report(self):
"""Generates a PDF report."""
pdf_path = str(Path(__file__).resolve().parent / "report.pdf")
report = PdfReport(pdf_path, self._items_db)
report.generate_report()
def on_window_close(self):
"""Callback for window close event."""
# Reference: https://stackoverflow.com/questions/111155/how-do-i-handle-the-window-close-event-in-tkinter
print("Window Closing ...")
self.destroy()
def _get_form_values(self):
"""Returns a Dictionary of the Form Values"""
return {
"name": self.entry_name.get(),
"amount": self.entry_amount.get(),
"description": self.entry_description.get(),
"date": self.entry_date.get(),
"category": self.entry_category.get(),
"subcategory": self.entry_subcategory.get(),
}
def clear_form(self):
"""Clears the form."""
self.entry_name.delete(0, last_index=len(self.entry_name.get()))
self.entry_amount.delete(0, last_index=len(self.entry_amount.get()))
self.entry_description.delete(0, last_index=len(self.entry_description.get()))
self.entry_date.delete(0, last_index=len(self.entry_date.get()))
self.entry_category.delete(0, last_index=len(self.entry_category.get()))
self.entry_subcategory.delete(0, last_index=len(self.entry_subcategory.get()))
def fill_form(
self, name, amount, description, date, category="None", subcategory="None"
):
"""Fills the form with provided values."""
self.clear_form()
self.entry_name.insert(0, name)
self.entry_amount.insert(0, amount)
self.entry_date.insert(0, date)
self.entry_description.insert(0, description)
self.entry_category.insert(0, category)
self.entry_subcategory.insert(0, subcategory)
def on_btn_add_clicked(self):
"""Callback for add button click event."""
new_item = self._create_item_from_form()
if new_item is not None:
self.items_table.add_item(new_item)
else:
messagebox.showerror("Error", "Invalid Item Data")
self.clear_form()
def on_btn_update_clicked(self):
"""Callback for update button click event."""
# Get the (one) selected item
selected_item = self.items_table.focus()
item_dct = self.items_table.item(selected_item)
values = item_dct["values"]
item_id = item_dct["text"]
row = [item_id] + list(values)
try:
item_obj = self._create_item(row)
except IndexError:
self.items_table.deselect()
messagebox.showerror("Error", "Invalid Action")
return
# Reconstruct the Forms
try:
item_obj.name = self.entry_name.get().strip()
item_obj.amount = float(self.entry_amount.get().strip())
item_obj.description = self.entry_description.get().strip()
item_obj.date = datetime.strptime(
self.entry_date.get().strip(), "%Y-%m-%d %H:%M:%S"
)
item_obj.category = (
None
if self.entry_category.get() == "None"
else (
Category(self.entry_category.get().strip())
if self.entry_subcategory.get().strip() == "None"
else Category(
self.entry_category.get().strip(),
self.entry_subcategory.get().strip(),
)
)
)
except ValueError as value_error:
messagebox.showerror("Error", str(value_error))
return
# Update Local Data and View
self.items_table.update_item(item_obj)
self.clear_form()
def on_btn_delete_clicked(self):
"""Callback for delete button click event."""
yes_or_no = messagebox.askyesno("Delete Item", "Do you want to continue?")
if not yes_or_no:
self.items_table.deselect()
return
self.clear_form()
if len(self.items_table.selection()) == 0:
return
items = (self.items_table.item(item) for item in self.items_table.selection())
items = ([item["text"]] + list(item["values"]) for item in items)
item_objs = [self._create_item(item) for item in items]
self.items_table.deletes_item(item_objs)
def _create_item(self, inp_item):
"""
Creates an item from input.
Args:
inp_item (List[str|int|float]): List representing an item.
"""
try:
item_id = inp_item[0]
item_name = inp_item[1]
item_amount = inp_item[2]
item_description = inp_item[3]
item_date = inp_item[4]
item_category = inp_item[5]
item_subcategory = inp_item[6]
# Clean Date
item_date = datetime.strptime(item_date, "%Y-%m-%d %H:%M:%S")
if item_category in ["None", ""]:
category = None
else:
if item_subcategory in ["None", ""]:
category = Category(item_category)
else:
category = Category(item_category, item_subcategory)
item_obj = Item(
item_id, item_name, item_amount, item_description, item_date, category
)
return item_obj
except ValueError:
return None
def _create_item_from_form(self) -> Item | None:
"""Creates an item from the form."""
try:
if self.entry_category.get().strip() in ["None", ""]:
category = None
else:
entry_category = self.entry_category.get().strip()
if self.entry_subcategory.get() in ["None", ""]:
category = Category(entry_category)
else:
entry_subcategory = self.entry_subcategory.get().strip()
category = Category(entry_category, entry_subcategory)
temp_item = Item.create(
self.entry_name.get(),
float(self.entry_amount.get()),
self.entry_description.get(),
self.entry_date.get(),
category,
)
return temp_item
except ValueError as value_error:
print(value_error)
return None
def on_row_selected(self, e):
"""Callback for row selection event."""
# Reference: https://stackoverflow.com/questions/30614279/tkinter-treeview-get-selected-item-values
# Reference: For Multiple Selected Rows
# https://stackoverflow.com/questions/48867800/tk-treeview-focus-how-do-i-get-multiple-selected-lines
# Set the Selected Item for the TreeView
selected_item = self.items_table.focus()
item_dct = self.items_table.item(selected_item)
values = item_dct["values"]
item_id = item_dct["text"]
row = [item_id] + list(values)
self.fill_form(
values[0],
values[1],
values[2],
values[3],
category=values[4],
subcategory=values[5],
)
if __name__ == "__main__":
DB_PATH = str(Path(__file__).resolve().parent / "items.json")
app = App(DB_PATH)
app.mainloop()