widget_app Directory Reference

Directory dependency graph for widget_app:

Directories
	src

Detailed Description

Headless gate proving the ra8_widget compositor (#145) and the ra8_app framework (#146) work end to end on the M85.

Two apps register into an ra8_app registry. Each is a widget tree – a fixed-height status bar over a flex content widget – laid out by ra8_widget_layout_stack (delegating to ra8_box) and drawn by each widget's render callback through ra8_gfx into a small off-screen RGB565 framebuffer. Launching the second app fires the focus lifecycle (on_leave then on_enter) before compositing it. The banner hashes both composites, so the gate asserts that both apps registered, that the two composites are distinct, that the lifecycle fired exactly once each, and – the #145 partial-flush acceptance – that invalidating only the status bar yields damage of exactly the status-bar rect with the fast (A2) hint, the minimal e-ink update.

The pure logic (layout, input routing, damage, registration, lifecycle) is unit-tested on the host; this app runs the whole composition and lifecycle on the target and CRC-gates the result, so any drift trips the gate. No panel, SDRAM, touch or SD dependency – widget_app_demo is the panel-visible sibling.

Re-expressing the ereader_ui monolith as a composition of apps is the follow-on integration step; it waits on the just apps::emulator::golden baseline settling, since that must stay byte-identical.