MiniPaint App 🎨

MiniPaint is a lightweight, user-friendly painting application built in Java using the Swing graphics library. It supports creating, customizing, and managing shapes on a canvas. This tool is designed for beginners exploring GUI programming and Object-Oriented concepts.

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Features

1. Shape Creation and Management

   • Create basic shapes: rectangles, circles, squares, and lines.
   • Assign unique names to shapes (e.g., circle01, rectangle03).
   • Organize and manage shapes using a drop-down menu for easy selection.

2. Shape Customization

   • Adjust properties such as position, size, and color.
   • Resize and move shapes via a simple interface.
   • Customize pen and fill colors for a polished look.

3. Interactive GUI

   • Utilize a graphical interface for selecting and editing shapes.
   • Input properties (position, radius, etc.) via dialog boxes.
   • Position shapes easily by clicking on the canvas.

4. File Operations

   • Save and load shapes to/from a file for persistence.

5. Deletion, Undo and Redo

   • Delete selected shapes from the drop-down menu.
   • Include optional undo and redo features for accidental edits.

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Architecture

1. ShapeDialog

   • Handles temporary input for creating and customizing shapes.

2. Shape

   • Represents a geometric object with attributes like type, size, and coordinates.

3. Engine

   • Manages all shape instances, updates the canvas, and facilitates file operations.

4. GUI Interface

   • Developed using Java Swing for buttons, menus, and dialog boxes.

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UML Diagram

The app design utilizes inheritance and polymorphism, ensuring scalability and clean code. The UML diagram illustrates relationships between:

• Base Class: Shape
• Derived Classes: Circle, Rectangle, Square, LineSegment
• Additional utilities for managing events and file I/O.

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