Draw + Design Patterns

Context

• Origin Developed as part of a course in Java, UML and Design Patterns at Karlstad University.
• Objective A drawing program where users can draw different shapes with chosen line width/line color/fill color. Implements several distinct design patterns.
• Status 🟢 Complete/Functional

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Notes

• This app was integrated against a pre-made composite-pattern (model/composite)
• v4 contains the initial integration
• v4.1 contains the complete drawing program

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Systems Architechture

• Logic MVC
• Tech Stack Java + Java Swing (Eclipse IDE)

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Functionality

• Draw different shapes (circle, line, rectangle)
• Pick line width, -color, -thickness and fill color.
• Data persistence throuch object serialization (.dat)
• Distinct design patterns implemented and where to look for them:
  • Chain of responsibility (app/controller/chain)
  • Composite (model/composite)
  • State (model/state)
  • Visitor (model/visitor)
  • Facade (model)
  • Command (controller/commands)

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Setup & Usage

1. Clone the repository
2. Open in IDE of your choice

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Learning Outcomes

• Implementing Gang of Four design patterns in a Java setting
• Creating a layered MVC structure from scratch
• Integrating with legacy code (the pre-existing composite)