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Create Calculator-with-history.py
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‎47-Calculator-with-history/Calculator-with-history.py‎

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import tkinter as tk
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from tkinter import messagebox
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# =========================
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# THEME
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# =========================
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APP_BG = "#121212"
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PANEL_BG = "#1F1F1F"
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BTN_BG = "#2C2C2C"
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BTN_HOVER = "#3A3A3A"
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BTN_ACTIVE = "#FF6F61"
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ACCENT = "#FF6F61"
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TEXT_CLR = "#E0E0E0"
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SUBTEXT_CLR = "#AAAAAA"
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INPUT_BG = "#333333"
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INPUT_FG = "#FFFFFF"
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# =========================
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# APP
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# =========================
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class CalculatorApp:
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def __init__(self, root):
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self.root = root
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root.title("MateTools – Pro Calculator")
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root.geometry("1000x500")
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root.configure(bg=APP_BG)
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root.resizable(False, False)
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# =========================
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# LEFT PANEL (Actions)
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# =========================
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left = tk.Frame(root, bg=PANEL_BG, width=420)
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left.pack(side="left", fill="y")
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header = tk.Frame(left, bg=PANEL_BG)
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header.pack(fill="x", padx=16, pady=(18, 10))
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tk.Label(
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header,
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text="MateTools",
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bg=PANEL_BG,
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fg=ACCENT,
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font=("Segoe UI", 20, "bold")
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).pack(side="left")
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tk.Frame(left, bg=ACCENT, height=2).pack(fill="x", padx=16, pady=(0, 14))
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tk.Label(
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left,
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text="Pro Calculator",
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bg=PANEL_BG,
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fg=TEXT_CLR,
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font=("Segoe UI", 14, "bold")
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).pack(anchor="w", padx=16, pady=(0, 2))
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tk.Label(
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left,
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text="Perform calculations with history",
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bg=PANEL_BG,
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fg=SUBTEXT_CLR,
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font=("Segoe UI", 10)
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).pack(anchor="w", padx=16, pady=(0, 16))
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tk.Frame(left, bg=BTN_BG, height=1).pack(fill="x", padx=16, pady=(0, 16))
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btn_frame = tk.Frame(left, bg=PANEL_BG)
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btn_frame.pack(fill="x", padx=16, pady=16)
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def make_btn(text, cmd, color=BTN_BG):
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btn = tk.Button(
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btn_frame,
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text=text,
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command=cmd,
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bg=color,
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fg="white",
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font=("Segoe UI", 11, "bold"),
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relief="flat",
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height=2,
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width=20
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)
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# Hover effect
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btn.bind("<Enter>", lambda e, b=btn: b.config(bg=BTN_HOVER))
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btn.bind("<Leave>", lambda e, b=btn, c=color: b.config(bg=c))
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btn.bind("<ButtonPress-1>", lambda e, b=btn: b.config(bg=BTN_ACTIVE))
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btn.bind("<ButtonRelease-1>", lambda e, b=btn, c=color: b.config(bg=BTN_HOVER))
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return btn
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make_btn("Clear Input", self.clear_input, ACCENT).pack(side="top", pady=8)
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make_btn("Clear History", self.clear_history, BTN_BG).pack(side="top", pady=8)
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make_btn("About", self.show_about, BTN_BG).pack(side="top", pady=20)
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# =========================
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# RIGHT PANEL (Calculator UI)
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# =========================
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right = tk.Frame(root, bg=APP_BG)
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right.pack(side="right", fill="both", expand=True)
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self.result_card = tk.Frame(right, bg=PANEL_BG, bd=2, relief="ridge")
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self.result_card.pack(padx=30, pady=20, fill="both", expand=True)
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# ---------- TOP: Calculator Label ----------
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tk.Label(
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self.result_card,
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text="Calculator",
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bg=PANEL_BG,
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fg=TEXT_CLR,
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font=("Segoe UI", 18, "bold")
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).pack(pady=(20, 10))
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# ---------- MAIN FRAME: split left/right ----------
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main_frame = tk.Frame(self.result_card, bg=PANEL_BG)
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main_frame.pack(fill="both", expand=True, padx=20, pady=10)
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# ===== LEFT COLUMN: Input + Buttons =====
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left_frame = tk.Frame(main_frame, bg=PANEL_BG)
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left_frame.pack(side="left", fill="y", padx=(0, 15))
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# Input Entry
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self.input_var = tk.StringVar()
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self.input_entry = tk.Entry(
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left_frame,
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textvariable=self.input_var,
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bg=INPUT_BG,
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fg=INPUT_FG,
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font=("Segoe UI", 18),
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relief="flat",
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justify="right"
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)
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self.input_entry.pack(fill="x", pady=(0, 10))
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self.input_entry.bind("<Return>", lambda event: self.calculate())
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# Button Grid
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btn_frame = tk.Frame(left_frame, bg=PANEL_BG)
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btn_frame.pack()
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buttons = [
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('7', '8', '9', '/'),
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('4', '5', '6', '*'),
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('1', '2', '3', '-'),
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('0', '.', '=', '+'),
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]
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for r, row in enumerate(buttons):
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for c, char in enumerate(row):
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if char == '=':
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btn = tk.Button(
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btn_frame, text=char, bg=ACCENT, fg="white",
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font=("Segoe UI", 14, "bold"), relief="flat",
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width=5, height=2,
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command=self.calculate
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)
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btn.bind("<Enter>", lambda e, b=btn: b.config(bg="#FF8679"))
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btn.bind("<Leave>", lambda e, b=btn: b.config(bg=ACCENT))
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btn.bind("<ButtonPress-1>", lambda e, b=btn: b.config(bg="#FF4F3F"))
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btn.bind("<ButtonRelease-1>", lambda e, b=btn: b.config(bg="#FF8679"))
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else:
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btn = tk.Button(
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btn_frame, text=char, bg=BTN_BG, fg="white",
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font=("Segoe UI", 14, "bold"), relief="flat",
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width=5, height=2,
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command=lambda ch=char: self.add_to_input(ch)
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)
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btn.bind("<Enter>", lambda e, b=btn: b.config(bg=BTN_HOVER))
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btn.bind("<Leave>", lambda e, b=btn: b.config(bg=BTN_BG))
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btn.bind("<ButtonPress-1>", lambda e, b=btn: b.config(bg=BTN_ACTIVE))
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btn.bind("<ButtonRelease-1>", lambda e, b=btn: b.config(bg=BTN_HOVER))
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btn.grid(row=r, column=c, padx=5, pady=5)
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# ===== RIGHT COLUMN: Result + History =====
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right_frame = tk.Frame(main_frame, bg=PANEL_BG)
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right_frame.pack(side="right", fill="both", expand=True)
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# Result display in card-like style
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result_card = tk.Frame(right_frame, bg="#1C1C1C", bd=1, relief="ridge")
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result_card.pack(fill="x", pady=(0, 10))
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tk.Label(
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result_card,
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text="Result",
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bg="#1C1C1C",
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fg=SUBTEXT_CLR,
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font=("Segoe UI", 12, "bold")
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).pack(anchor="w", padx=10, pady=(5, 0))
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self.result_label = tk.Label(
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result_card,
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text="--",
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bg="#1C1C1C",
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fg=ACCENT,
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font=("Segoe UI", 18, "bold")
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)
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self.result_label.pack(anchor="e", padx=10, pady=(0, 5))
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# History display in scrollable frame
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history_card = tk.Frame(right_frame, bg="#1C1C1C", bd=1, relief="ridge")
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history_card.pack(fill="both", expand=True)
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tk.Label(
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history_card,
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text="History",
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bg="#1C1C1C",
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fg=SUBTEXT_CLR,
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font=("Segoe UI", 12, "bold")
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).pack(anchor="w", padx=10, pady=(5, 0))
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self.history_box = tk.Listbox(
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history_card,
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bg=INPUT_BG,
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fg=INPUT_FG,
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font=("Segoe UI", 12),
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height=10,
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selectbackground=ACCENT,
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relief="flat"
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)
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self.history_box.pack(fill="both", expand=True, padx=10, pady=(0, 10))
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self.history = []
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# =========================
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# METHODS
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# =========================
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def add_to_input(self, char):
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self.input_var.set(self.input_var.get() + char)
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def calculate(self):
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expr = self.input_var.get()
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if not expr.strip():
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return
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try:
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result = round(eval(expr), 6) # Round to 6 decimal places
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self.result_label.config(text=f"{result}")
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# Append to history and keep only last 10 items
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self.history.append(f"{expr} = {result}")
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self.history = self.history[-10:]
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self.update_history()
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self.input_var.set(str(result))
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except Exception as e:
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messagebox.showerror("Error", f"Invalid expression: {e}")
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def update_history(self):
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self.history_box.delete(0, tk.END)
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for item in self.history:
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self.history_box.insert(tk.END, item)
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def clear_input(self):
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self.input_var.set("")
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def clear_history(self):
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self.history = []
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self.update_history()
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def show_about(self):
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messagebox.showinfo(
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"About",
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"MateTools – Pro Calculator\n\n"
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"• Perform calculations instantly\n"
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"• Click buttons or type expressions\n"
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"• Keep track of history (last 10 calculations)\n"
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"• Results are rounded to 6 decimal places\n\n"
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"Built by MateTools"
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)
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# =========================
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# RUN
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# =========================
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if __name__ == "__main__":
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root = tk.Tk()
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CalculatorApp(root)
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root.mainloop()

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