Calculator

A sleek, functional graphical calculator built using Python’s Turtle graphics module and Tkinter. This project demonstrates how to create a custom user interface, handle click events, and perform mathematical evaluations in a visual environment.

Features

• Custom GUI: A completely custom-drawn interface using Turtle graphics.
• Dynamic Styling: Color-coded buttons (White for numbers, Green for operators, Pink for equals).
• Interactive Input: Full support for mouse-click interactions.
• Math Logic: Handles addition, subtraction, multiplication, division, and parentheses using Python's evaluation logic.
• Smart Display: Includes an "Error" catch for invalid equations and a character limit with truncation to keep the display clean.
• Icon Support: Built-in support to display a custom icon.png in the window title bar.

Prerequisites

• Python 3.x
• The turtle and tkinter libraries (usually included by default with Python installations).

Installation

1. Clone this repository or download the source code.
2. (Optional) Place an image named icon.png in the same directory to customize the window icon.
3. Run the script:

python calculator.py

How it Works

The application uses two separate Turtle objects to manage the experience:

1. The Drawer: Responsible for rendering the static UI elements like buttons and the display box.
2. The Display Pen: Responsible for updating the text on the screen every time a button is pressed.

Button Hitbox Logic

Since Turtle graphics don't have built-in buttons, this script uses coordinate mapping. Every button's (x, y) boundaries are stored in a list. When you click, the script checks if your mouse coordinates fall within any of those stored boundaries.

Key Configurations

You can easily customize the look in the Configuration section of the code:

• FONT: Change the font style or size for buttons.
• COLORS: Modify the hex codes in build_ui() to change the theme.

Usage Note

The calculator uses Python's eval() function to calculate results. While efficient for a local tool, ensure you only use it for trusted inputs.

Contributing

Feel free to fork this project and add features like:

• Keyboard support (binding keys to turtle functions).
• Advanced math functions (square roots, percentages).
• Dark mode toggle.

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Credit: Sanzu