pyCalc.py

# Modules
import customtkinter as ct
from PIL import Image

# App appearance mode, settings & more
ct.set_appearance_mode("System")
app = ct.CTk(fg_color="black")
app.title("pyCalculator")
app.geometry(f"{425}x{680}")
app.resizable(False, False)

# Fonts & Colors
monst = ct.CTkFont(family="Montserrat",size=80,weight="bold")
monst2 = ct.CTkFont(family="Montserrat",size=20,weight="bold")
dark_grey = "#454545"
light_grey = "#999999"
lighter = "#AFAABB"
darker = "#696379"
purple = "#AA00FF"
mid = "#7965B0"

# App Logo
pyCalc_logo = ct.CTkImage(dark_image=Image.open("pylogo.png"), size=(600, 90))

# App Frames
frame1 = ct.CTkFrame(app, fg_color="black")
frame1.pack(side="top", expand=True, fill="both", padx=5, pady=5)

frame2 = ct.CTkFrame(app, fg_color="black")
frame2.pack(side="bottom", expand=True, fill="both", padx=5, pady=5)

# Entry/title/Logo
Image_Label = ct.CTkLabel(master=frame1,
                   text="", 
                   image=pyCalc_logo, 
                   font=monst, 
                   text_color="white",
                   width=425, height=90
                   )
Image_Label.pack(expand=True, fill="both", side="top")

entry = ct.CTkEntry(master=frame1, 
                    justify="right", 
                    state="normal", 
                    height=150, 
                    fg_color="black",
                    font=monst,
                    placeholder_text="0",
                    placeholder_text_color="white",
                    border_color="black" 
                    )
entry.pack(expand=True, fill="both", side="bottom", pady=5, padx=5)




# --- FUNCTIONS ---

expression = ""
results = ""

# Function ---> update AC button and command
def update_All_Clear_Btn():
    global expression, results
    if not expression or results:
        All_Clear_Btn.configure(text="AC", command=all_clear)
    else:
        All_Clear_Btn.configure(text="C", command=clear_single_char)

# Function ---> Pressed button
def pressed(char):
    global expression
    
    # Grab button values, & extend cursor
    current_entry = entry.get()
    new_entry = current_entry + char
    entry.delete(0, ct.END)
    entry.insert(0, new_entry)
    expression = new_entry
    entry.xview_moveto(1.0)
    entry.icursor(len(new_entry))
    update_All_Clear_Btn()
 
# Function ---> All Clear (AC)
def all_clear():
    global expression, results
    entry.delete(0, ct.END)
    expression = ""
    update_All_Clear_Btn()
    entry.configure(placeholder_text="0",
                    placeholder_text_color="white")

# Function ---> Equals
def equals():
    global expression, results
    
    # Replace customs, eval & Update entry
    try:
        expression = expression.replace("÷", "/").replace("x", "*").replace("−", "-").replace("%", "/100")
        results = str(eval(expression))
        entry.delete(0, ct.END)
        entry.insert(0, results)
        expression = results
        entry.xview_moveto(1.0)
        entry.icursor(len(results))
        update_All_Clear_Btn()
        expression = ""
        results = ""
        adjust_font_size(entry)
    
    # Handle errors
    except Exception as e:
        handle_error()

# Function ---> Error Handling & Update AC       
def handle_error():
    global expression, results
    entry.delete(0, ct.END)
    entry.insert(0, "Error")
    expression = ""
    results = ""
    update_All_Clear_Btn()
    
# Function ---> Toggle/Alter sign(+/-) at cursor
def alter_sign():
    current_entry = entry.get()
    index = entry.index(ct.INSERT)
    
    # Check if entry is void, or cursor, at start
    if current_entry == "" or index == 0:
        entry.insert(index, "-")
    else:
        # Find nearesr sign before cursor
        nearest_sign_index = max(current_entry.rfind('+', 0, index),
                                 current_entry.rfind('-', 0, index),
                                 current_entry.rfind('x', 0, index),
                                 current_entry.rfind('÷', 0, index))
        
        # Remove "-" at nearest sign if negative, and the signs is odd number, b4 cursor
        if nearest_sign_index >= 0 and current_entry[nearest_sign_index] == '-' \
                and current_entry[nearest_sign_index + 1:index].count('-') % 2 == 1:
            entry.delete(nearest_sign_index + 1)
        else:
            # Insert/Remove "-" based on index
            if current_entry[index-1] == '-':
                entry.delete(index-1)
            else:
                entry.insert(index, "-")

# Function ---> Clear Single char (C)
def clear_single_char():
    global expression
    current_entry = entry.get()
    if current_entry:
        new_entry = current_entry[:-1]
        entry.delete(0, ct.END)
        entry.insert(0, new_entry)
        expression = new_entry
        update_All_Clear_Btn()
        entry.configure(placeholder_text="0",
                    placeholder_text_color="white")

# Function ---> Adjust results to fit dynamically
def adjust_font_size(widget):
    max_font_size = 80
    min_font_size = 20
    max_width = widget.winfo_width() - 20
    text = widget.get()
    
    # Calculate font_size based on text len & entry width
    font_size = max(min_font_size, min(max_font_size, int(max_width / len(text))))
    
    # Configure to Monstserrat
    widget.configure(font=("Montserrat", font_size, "bold"))




# --- OTHER WIDGETS---  

# Buttons /1
All_Clear_Btn = ct.CTkButton(master=frame2, text="AC", 
                         corner_radius=50, 
                         width=93.75, height=68, 
                         font=monst2, 
                         fg_color=light_grey,
                         hover_color=lighter,
                         command=all_clear)
All_Clear_Btn.grid(row=0, column=0, sticky="nswe", pady=5, padx=5)

Btn_7 = ct.CTkButton(master=frame2, text="7", 
                     corner_radius=50, width=93.75, height=68, 
                     font=monst2, 
                     fg_color=dark_grey,
                     hover_color=darker,
                     command=lambda: pressed("7"))
Btn_7.grid(row=1, column=0, sticky="nswe", pady=5, padx=5)

Btn_4 = ct.CTkButton(master=frame2, text="4", 
                     corner_radius=50, 
                     width=93.75, height=68, 
                     font=monst2, 
                     fg_color=dark_grey,
                     hover_color=darker,
                     command=lambda: pressed("4"))
Btn_4.grid(row=2, column=0, sticky="nswe", pady=5, padx=5)

Btn_1= ct.CTkButton(master=frame2, text="1", 
                    corner_radius=50, 
                    width=93.75, height=68, 
                    font=monst2, 
                    fg_color=dark_grey,
                    hover_color=darker,
                    command=lambda: pressed("1"))
Btn_1.grid(row=3, column=0, sticky="nswe", pady=5, padx=5)

Btn_0 = ct.CTkButton(master=frame2, text="0", 
                     corner_radius=50, 
                     width=93.75, height=68, 
                     font=monst2, 
                     anchor="w", 
                     fg_color=dark_grey,
                     hover_color=darker,
                     command=lambda: pressed("0"))
Btn_0.grid(row=4, column=0, sticky="nswe", pady=5, columnspan=2, padx=5)

# Buttons /2
sign_Btn = ct.CTkButton(master=frame2, text="+/-", 
                        corner_radius=50, 
                        width=93.75, height=68, 
                        font=monst2, 
                        fg_color=light_grey,
                        hover_color=lighter,
                        command=alter_sign)
sign_Btn.grid(row=0, column=1, sticky="nswe", pady=5, padx=5)

Btn_8 = ct.CTkButton(master=frame2, text="8", 
                     corner_radius=50, 
                     width=93.75, height=68, 
                     font=monst2, 
                     fg_color=dark_grey,
                     hover_color=darker,
                     command=lambda: pressed("8"))
Btn_8.grid(row=1, column=1, sticky="nswe", pady=5, padx=5)

Btn_5= ct.CTkButton(master=frame2, text="5", 
                    corner_radius=50, 
                    width=93.75, height=68, 
                    font=monst2, 
                    fg_color=dark_grey,
                    hover_color=darker,
                    command=lambda: pressed("5"))
Btn_5.grid(row=2, column=1, sticky="nswe", pady=5, padx=5)

Btn_2= ct.CTkButton(master=frame2, text="2", 
                    corner_radius=50, 
                    width=93.75, height=68, 
                    font=monst2, 
                    fg_color=dark_grey,
                    hover_color=darker,
                    command=lambda: pressed("2"))
Btn_2.grid(row=3, column=1, sticky="nswe", pady=5, padx=5)

# Buttons /3
percent_Btn = ct.CTkButton(master=frame2, text="%", 
                           corner_radius=50, 
                           width=93.75, height=68, 
                           font=monst2, 
                           fg_color=light_grey,
                           hover_color=lighter,
                           command=lambda: pressed("%"))
percent_Btn.grid(row=0, column=2, sticky="nswe", pady=5, padx=5)

Btn_9 = ct.CTkButton(master=frame2, text="9", 
                     corner_radius=50, 
                     width=93.75, height=68, 
                     font=monst2, 
                     fg_color=dark_grey,
                     hover_color=darker,
                     command=lambda: pressed("9"))
Btn_9.grid(row=1, column=2, sticky="nswe", pady=5, padx=5)

Btn_6 = ct.CTkButton(master=frame2, text="6", 
                     corner_radius=50, 
                     width=93.75, height=68, 
                     font=monst2, 
                     fg_color=dark_grey,
                     hover_color=darker,
                     command=lambda: pressed("6"))
Btn_6.grid(row=2, column=2, sticky="nswe", pady=5, padx=5)

Btn_3= ct.CTkButton(master=frame2, text="3", 
                    corner_radius=50, 
                    width=93.75, height=68, 
                    font=monst2, 
                    fg_color=dark_grey,
                    hover_color=darker,
                    command=lambda: pressed("3"))
Btn_3.grid(row=3, column=2, sticky="nswe", pady=5, padx=5)

point_Btn = ct.CTkButton(master=frame2, text=".", 
                         corner_radius=50, 
                         width=93.75, height=68, 
                         font=monst2, 
                         fg_color=dark_grey,
                         hover_color=darker,
                         command=lambda: pressed("."))
point_Btn.grid(row=4, column=2, sticky="nswe", pady=5, padx=5)

# Buttons /4
div_Btn = ct.CTkButton(master=frame2, text="÷", 
                       corner_radius=50, 
                       width=93.75, height=68, 
                       font=monst2, 
                       fg_color=purple,
                       hover_color=mid,
                       command=lambda: pressed("÷"))
div_Btn.grid(row=0, column=3, sticky="nswe", pady=5, padx=5)

mul_Btn = ct.CTkButton(master=frame2, text="x", 
                       corner_radius=50, 
                       width=93.75, height=68, 
                       font=monst2, 
                       fg_color=purple,
                       hover_color=mid,
                       command=lambda: pressed("x"))
mul_Btn.grid(row=1, column=3, sticky="nswe", pady=5, padx=5)

minus_Btn = ct.CTkButton(master=frame2, text="−", 
                         corner_radius=50, 
                         width=93.75, height=68, 
                         font=monst2, 
                         fg_color=purple,
                         hover_color=mid,
                         command=lambda: pressed("−"))
minus_Btn.grid(row=2, column=3, sticky="nswe", pady=5, padx=5)

add_Btn = ct.CTkButton(master=frame2, text="+", 
                       corner_radius=50, 
                       width=93.75, height=68, 
                       font=monst2, 
                       fg_color=purple,
                       hover_color=mid,
                       command=lambda: pressed("+"))
add_Btn.grid(row=3, column=3, sticky="nswe", pady=5, padx=5)

equal_Btn = ct.CTkButton(master=frame2, text="=", 
                         corner_radius=50, 
                         width=93.75, height=68, 
                         font=monst2, 
                         fg_color=purple,
                         hover_color=mid,
                         command=equals)
equal_Btn.grid(row=4, column=3, sticky="nswe", pady=5, padx=5)




# Run app (as admin😁)
app.mainloop()