REI Interface Module

REI (Requester/Interface) is a custom windowing and interface system built on top of Intuition. It manages windows, screens, gadgets, menus, and provides a message-based event system. REI interfaces are designed with the REI-Editor tool and loaded at runtime, allowing the separation of UI layout from application logic.

The REI system provides automatic event handling, including keyboard shortcuts for gadgets, double-click detection, and Hook-based callback dispatching through the WaitREIMsg() event loop.

Window Lifecycle Functions

• OpenREIA — Opens and displays a specific REI on screen, with optional tag-based attribute overrides.
• CloseREI — Hides a REI without freeing its memory, allowing it to be reopened later.
• FindREI — Finds a REI structure by name in the internal list.
• ActiveREI — Returns the REI associated with the currently active window.

Window State Functions

• LockREI — Blocks all user input on a REI, setting the mouse pointer to the busy state.
• UnlockREI — Restores user input on a previously locked REI.
• RefreshREI — Redraws all gadgets, borders, and window elements of a REI.

Event Handling

• WaitREIMsg — Main event loop that processes all REI events, including automatic gadget keyboard control and Hook dispatch.

Information and Attributes

• InterfaceInfo — Displays an information requester about the current interface.
• SetREIAttrsA — Dynamically sets the attributes of a currently displayed REI.
• GetREIAttrsA — Retrieves the attributes of a REI into a tag list.