OCaml GUI Drawing Program

This project is a simple graphical user interface (GUI) library written in OCaml. The program uses different modules to define a graphics context (gctx), implement various widgets, and allow basic drawing functionalities.

Project Structure

The main files in this project are:

• gctx.ml: Defines the gctx (graphics context) module
• gctx.mli: The interface file for gctx.ml
• paint.ml: The main file for the paint application
• widget.ml: Implements various GUI widgets, including buttons, checkboxes, and layout widgets (e.g., vertical and horizontal pairs of widgets)
• widget.mli: The interface file for widget.ml

How to Use

1. Compilation: Compile the project using ocamlc or ocamlopt, along with any necessary dependencies. You can use the following command:

   ocamlc gctx.mli gctx.ml widget.mli widget.ml paint.ml -o paint_app

2. Running the Application: Execute the compiled application:

   ./paint_app

   This will open a graphical window where you can use the tools to draw shapes.

3. Drawing Tools: The application supports various modes such as drawing lines, points, and ellipses. It also provides options to select colors, change line thickness, and undo actions.

Features

• Drawing Primitives: Create lines, points, and ellipses using mouse events.
• Color and Thickness: Change the color and thickness of the drawing elements.
• Undo Functionality: Revert the last drawn shape.
• Widgets: The GUI includes buttons, sliders, checkboxes, and other widgets for an interactive experience.