kalkulator-python/kalkulator.py at main · franzxml/kalkulator-python · GitHub

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import tkinter as tk

class CalculatorApp:
    def __init__(self, root):
        self.root = root
        self.root.title("Kalkulator")
        self.root.geometry("350x540")
        self.root.resizable(False, False)

        self.is_dark_mode = True
        self.buttons = [] # Store button references to update colors

        self.expression = ""
        self.input_text = tk.StringVar()

        # Theme Colors
        self.colors = {
            "dark": {
                "bg": "#202020", "display_bg": "#303030", "text": "white",
                "btn_num": "#505050", "btn_op": "#ff9500", "btn_action": "#a5a5a5",
                "btn_num_text": "white", "btn_op_text": "white", "btn_action_text": "black"
            },
            "light": {
                "bg": "#f0f0f0", "display_bg": "#e0e0e0", "text": "black",
                "btn_num": "#ffffff", "btn_op": "#ff9500", "btn_action": "#d4d4d2",
                "btn_num_text": "black", "btn_op_text": "white", "btn_action_text": "black"
            }
        }

        # Top Bar for Theme Toggle
        self.top_frame = tk.Frame(self.root)
        self.top_frame.pack(side=tk.TOP, fill=tk.X, padx=10, pady=10)

        # Icon only button, adjusted font size and padding for better centering
        self.theme_btn = tk.Button(self.top_frame, text="☀", font=('Arial', 12),
                                   command=self.toggle_theme, bd=1, relief="raised", cursor="hand2")
        self.theme_btn.pack(side=tk.RIGHT, ipadx=10, ipady=2)

        # Display Screen
        self.input_frame = self.create_display()
        self.input_frame.pack(side=tk.TOP, fill=tk.BOTH)

        # Buttons
        self.btns_frame = self.create_buttons()
        self.btns_frame.pack(fill=tk.BOTH, expand=True)

        # Apply initial theme
        self.apply_theme()

    def create_display(self):
        frame = tk.Frame(self.root, height=100)
        frame.pack_propagate(0)  # Prevent frame from shrinking

        vcmd = (self.root.register(self.validate_input), '%P')
        self.entry = tk.Entry(frame, font=('Arial', 30, 'bold'), textvariable=self.input_text, width=50,
                         bd=0, justify=tk.RIGHT,
                         validate="key", validatecommand=vcmd)
        self.entry.pack(side=tk.TOP, ipady=15, padx=10, pady=10, fill=tk.BOTH, expand=True)
        return frame

    def validate_input(self, new_value):
        if new_value == "Error":
            return True
        allowed_chars = "0123456789.-+*/%() "
        return all(char in allowed_chars for char in new_value)

    def create_buttons(self):
        frame = tk.Frame(self.root)

        # Configure Grid Weights
        for i in range(5):
            frame.rowconfigure(i, weight=1)
        for i in range(4):
            frame.columnconfigure(i, weight=1)

        # Helper to categorize buttons for theming
        # types: 'num', 'op', 'action'

        # Row 1
        self.create_btn(frame, "C", 0, 0, 'action')
        self.create_btn(frame, "⌫", 0, 1, 'action')
        self.create_btn(frame, "%", 0, 2, 'action')
        self.create_btn(frame, "/", 0, 3, 'op')

        # Row 2
        self.create_btn(frame, "7", 1, 0, 'num')
        self.create_btn(frame, "8", 1, 1, 'num')
        self.create_btn(frame, "9", 1, 2, 'num')
        self.create_btn(frame, "*", 1, 3, 'op')

        # Row 3
        self.create_btn(frame, "4", 2, 0, 'num')
        self.create_btn(frame, "5", 2, 1, 'num')
        self.create_btn(frame, "6", 2, 2, 'num')
        self.create_btn(frame, "-", 2, 3, 'op')

        # Row 4
        self.create_btn(frame, "1", 3, 0, 'num')
        self.create_btn(frame, "2", 3, 1, 'num')
        self.create_btn(frame, "3", 3, 2, 'num')
        self.create_btn(frame, "+", 3, 3, 'op')

        # Row 5 (0 spans 2 cols, . and =)
        btn_0 = tk.Button(frame, text="0", font=('Arial', 18), bd=2, relief="raised",
                          command=lambda: self.on_button_click("0"))
        btn_0.grid(row=4, column=0, columnspan=2, padx=2, pady=2, sticky="nsew")
        self.buttons.append((btn_0, 'num'))

        self.create_btn(frame, ".", 4, 2, 'num')
        self.create_btn(frame, "=", 4, 3, 'op')

        return frame

    def create_btn(self, frame, text, row, col, btn_type):
        btn = tk.Button(frame, text=text, font=('Arial', 18), bd=2, relief="raised",
                        command=lambda: self.on_button_click(text))
        btn.grid(row=row, column=col, padx=2, pady=2, sticky="nsew")
        self.buttons.append((btn, btn_type))

    def toggle_theme(self):
        self.is_dark_mode = not self.is_dark_mode
        self.apply_theme()

    def apply_theme(self):
        theme = self.colors["dark" if self.is_dark_mode else "light"]

        self.root.configure(bg=theme["bg"])
        self.top_frame.configure(bg=theme["bg"])
        self.input_frame.configure(bg=theme["bg"])
        self.btns_frame.configure(bg=theme["bg"])

        self.entry.configure(bg=theme["display_bg"], fg=theme["text"], insertbackground=theme["text"])

        # Update Toggle Button: Icon only
        # If Dark Mode -> Show Sun (to switch to light)
        # If Light Mode -> Show Moon (to switch to dark)
        self.theme_btn.configure(text="☀" if self.is_dark_mode else "☾",
                                 bg=theme["btn_action"], fg=theme["btn_action_text"])

        for btn, btn_type in self.buttons:
            if btn_type == 'num':
                bg = theme["btn_num"]
                fg = theme["btn_num_text"]
            elif btn_type == 'op':
                bg = theme["btn_op"]
                fg = theme["btn_op_text"]
            else: # action
                bg = theme["btn_action"]
                fg = theme["btn_action_text"]

            btn.configure(bg=bg, fg=fg, activebackground=theme["bg"], activeforeground=fg)

    def on_button_click(self, char):
        if char == "C":
            self.expression = ""
            self.input_text.set("")
        elif char == "⌫":
            self.expression = self.expression[:-1]
            self.input_text.set(self.expression)
        elif char == "=":
            try:
                # Replace visual symbols with python operators if needed (none used here yet except %)
                # simple eval with error handling
                result = str(eval(self.expression))
                self.input_text.set(result)
                self.expression = result
            except:
                self.input_text.set("Error")
                self.expression = ""
        elif char == "%":
            try:
                result = str(eval(self.expression) / 100)
                self.input_text.set(result)
                self.expression = result
            except:
                self.input_text.set("Error")
                self.expression = ""
        else:
            self.expression += str(char)
            self.input_text.set(self.expression)

if __name__ == "__main__":
    root = tk.Tk()
    app = CalculatorApp(root)
    root.mainloop()