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Lua for Game Development — Chapter 15: UI Systems, HUD, Menus & Data Binding

UI is the backbone of:

  • inventories
  • crafting
  • equipment menus
  • quests & story
  • shops
  • minimaps
  • HUD overlays
  • dialogue
  • pause menu
  • game settings

Lua is excellent for UI logic because:

  • UI widgets map naturally to tables
  • easy event dispatch
  • hot-reload speeds iteration
  • data binding = reactive UI
  • timeline-based animations work perfectly

This chapter builds a modern, scalable UI framework in Lua.

1. UI Widget System

UI widgets are components:

  • panels
  • labels
  • buttons
  • images/icons
  • windows
  • scroll lists
  • tooltips
  • HUD overlays

We define a generic widget base class.

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