Mini Paint Application

A simple yet powerful drawing application built with pure Java, featuring an intuitive GUI interface for creating and manipulating geometric shapes.

Features

Drawing Tools

• Shape Creation: Draw various geometric shapes including:
  • Circles
  • Triangles
  • Rectangles
  • Squares
  • Line segments

Shape Manipulation

• Resize: Dynamically resize any drawn shape
• Move: Drag and reposition shapes on the canvas
• Delete: Remove unwanted shapes from your drawing
• Recolor: Change the color of existing shapes

File Operations

• Save Drawing: Export your artwork to your computer for later use
• Load Drawing: Import previously saved drawings to continue editing
• File-based Storage: Uses I/O file operations as a lightweight database solution

Technical Architecture

Backend

• Language: Pure Java
• Architecture: Object-Oriented Programming (OOP) principles
• Design Patterns: Implements various design patterns for clean, maintainable code
• Purpose: Handles all business logic, shape calculations, and file operations

Frontend

• Interface: Java GUI (Swing/AWT)
• Purpose: Provides user-friendly interface for drawing and shape manipulation

Data Storage

• Method: File I/O operations
• Purpose: Serves as a simple database for saving and loading drawing data

Programming Paradigms

• Object-Oriented Design: Utilizes inheritance, encapsulation, and polymorphism
• Design Patterns: Implements industry-standard patterns for robust architecture
• Modular Structure: Clean separation of concerns between GUI, business logic, and data handling

Getting Started

Prerequisites

• Java Development Kit (JDK) 8 or higher
• Java Runtime Environment (JRE)

Installation

1. Clone or download the project files
2. Compile the Java source files:

   javac *.java

3. Run the application:

   java MainClass

   (Replace MainClass with your main class name)

How to Use

Creating Shapes

1. Select the desired shape tool from the toolbar/menu
2. Click and drag on the canvas to create the shape
3. Release to finalize the shape

Manipulating Shapes

• To Move: Select the shape you want to move from the menu and then choose the destination
• To Resize: Select the shape and use resize handles or controls
• To Recolor: Select the shape and choose a new color from the color palette
• To Delete: Select the shape and use the delete button

File Operations

• Save: press on the save button and choose where you want to save you drawing
• Load: press on load button and search for the draw you want to load from your PC

File Format

The application uses a custom file format to store:

• Shape types and properties
• Position coordinates
• Size dimensions
• Color information
• Layer order

Project Structure

mini-paint-app/
├── src/
│   ├── BackEnd/                    # Backend logic and operations
│   │   ├── Circle.java            # Circle shape implementation
│   │   ├── DrawingEngines.java    # Drawing engine logic
│   │   ├── LineSegment.java       # Line segment implementation
│   │   ├── Rectangle.java         # Rectangle shape implementation
│   │   ├── shapes.java            # Base shapes functionality
│   │   ├── Square.java            # Square shape implementation
│   │   └── Triangle.java          # Triangle shape implementation
│   ├── FrontEnd/                   # GUI components and user interface
│   │   ├── MoveShapee.java        # Shape movement functionality
│   │   ├── Paint.java             # Main paint application logic
│   │   ├── ResizeCircle.java      # Circle resizing operations
│   │   ├── ResizeLineSegment.java # Line segment resizing
│   │   ├── ResizeRectangle.java   # Rectangle resizing operations
│   │   ├── ResizeSquare.java      # Square resizing operations
│   │   └── ResizeTriangle.java    # Triangle resizing operations
│   └── Interfaces/                 # Interface definitions for OOP design
│       ├── DrawingEngine.java     # Core drawing engine interface
│       └── Shape.java             # Base shape class/interface
├── screenshots/                    # Application screenshots
└── README.md

Screenshots

Main Interface

Caption: The main application window showing the drawing canvas and available tools.

Save and Load Windows

Caption: Save dialog window for exporting drawings to file.

Caption: Load dialog window for importing previously saved drawings.

Recolor Window

Caption: Color selection window for changing shape colors.

Move Window

Caption: Interface showing shape movement functionality.

Resize Window

Caption: Window demonstrating shape resizing controls and options.

Drawing Example

Caption: Application window after drawing a shape, showing the canvas with a created shape.

Future Enhancements

• Additional shape types (ellipses, polygons)
• Layer management system
• Undo/Redo functionality
• Export to standard image formats (PNG, JPEG)
• Advanced color picker with gradients
• Shape grouping and ungrouping
• Grid and snap-to-grid functionality