Simple Calculator using Python Tkinter

This directory contains the source code for a simple graphical calculator application written in Python using the Tkinter library. This project is a fork that has been enhanced with additional features and an improved user interface.

Description

This Python code creates a basic calculator application with a graphical user interface (GUI). The GUI is built using the CustomTkinter library, which provides a modern look and feel.

The calculator can perform the following operations:

Standard Mode

• Addition (+)
• Subtraction (-)
• Multiplication (*)
• Division (/)
• Exponentiation (x²)
• Modulo (%)

Scientific Mode

• Trigonometric functions (sin, cos, tan)
• Inverse trigonometric functions (arcsin, arccos, arctan)
• Natural logarithm (ln)
• Base-10 logarithm (log)
• Square root (√)
• Cube root (∛)
• Power functions (xʸ)
• Factorial (x!)
• Absolute value (|x|)
• Pi (π) and Euler's number (e)

The calculator also includes these features:

• Mode Toggle: Switch between Standard and Scientific calculator layouts with a dedicated toggle button.
• History Panel: View previous calculations in a dedicated history panel, with clickable entries to reuse results.
• History Clear: Clear all history entries with a dedicated "Clear History" button.
• Keyboard Support: Full keyboard support including:
  • Numbers and basic operators
  • Enter key to evaluate expressions
  • Backspace to delete characters
  • C or Escape to clear display
  • Automatic operator conversion (* becomes ×, / becomes ÷)
• Clear Entry (C): Clears the current expression in the input field.
• Backspace (⌫): Deletes the last character from the input field.
• Change Sign (+/-): Inverts the sign of the current number or expression.
• Parentheses Support: Use parentheses for complex expressions.
• Resizable Window: The application window can be resized, and the layout will adjust accordingly.
• Modern Dark Theme: Clean, modern interface with dark theme and color-coded buttons.
• Error Handling: Comprehensive error handling for invalid expressions.

The calculator has a designated input field for entering expressions. Clicking the equals (=) button or pressing 'Enter' evaluates the expression, displaying the result in the input field and adding the calculation to the history.

Screenshots

Before:

After:

Requirements

• Python 3.x

• Tkinter library (included in most standard Python installations)

• CustomTkinter library (v2)

How to Run

1. Run pip install customtkinter
2. Open a terminal window and navigate to the directory where you saved the file.
3. Run the following command in the terminal:

python calc_v2.0.py

This will launch the calculator application.

Acknowledgments

This code utilizes the CustomTkinter library, which builds upon the standard Tkinter library to provide enhanced features and a modern look. The original project was forked and significantly improved by our team.

License

This project is licensed under the MIT License.