MrxGuiBase

Byte-for-byte identical to resident/MrxGuiBase — see that page for full documentation of its functions, inheritance, and events.

In the shell context

The foundational widget class library — Widget/TextWidget/ImageWidget/FlashWidget/SpriteWidget, WidgetManager, the control-focus queue, and the Event-driven dispatch loop. Most other files in this list import MrxGuiBase directly for these widget primitives (a few, like MrxGuiManager, reach them indirectly through the MrxGui facade instead) — the Flash-backed main menu, dialog boxes, and loading screens are built from exactly the same widget classes as the in-game HUD, so there’s nothing shell-specific to fork here.