ludic/examples/library/scene_menus.ludic
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feat(engine): #90 atlas-aware Sprite component, #91 become from listeners, 0.3.x ergonomics batch
Closes the two open issues and lands the pending unreleased batch:

- #90: `Sprite { atlas: 1 }` routes esys_sprite through atlas_draw_ex
  (scale/flip/tint), so cell / cell_span / strip ids of any size draw
  through the engine sprite-render system. examples/library/sprite_atlas
  is the pixel-readback regression.
- #91: `become` from an @On(Event) listener / global handler / plain
  function no longer segfaults the compiler; it emits @L_scene_leave()
  (a dispatch on the live scene id) so the leaving scene's on-exit runs.
  UI_* handles are readable from any code (widget table built on first
  use). examples/library/scene_menus covers it.
- fix: a windowed `ludicc -o` build that reaches the audio runtime only
  through the atlas/Assets preload import now links audio.ll +
  AVFoundation (the audio backend link was gated on a game-level
  Audio.* call, so any windowed game declaring Sprite failed to link).
- the hand-written "Unreleased" CHANGELOG section is converted to
  changesets under changes/ so `x release` generates it.
- plus the batch: engine-driven retained UI + UiClicked event, Overlay
  phase, TileSkin tilemap-render system, Key.* constants, Font/Ui/File
  namespaces, Sprite.strip, prefabs, managers, countdown fields,
  enum-typed machines, layer @Queries, ludic.prefs / ludic.dungeon
  packages, Ai.seek pathing, Solids.solid2, cursor confine (mode 3)
  fix, shooter centre-aim fix, reserved-word function diagnostic.

Verified: x test (124/124), x test-tools, check-impl, check-vocabulary,
check-docs, docs-gen + docs-check, bootstrap-cfree (seed is a fixpoint).

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
2026-09-04 01:36:08 +03:00

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# scene_menus.ludic — scenes: `become` from an @On listener, @Queries handlers inside
# a layer, `scene X shows Menu` (opened / closed by the engine), `lasts N then Y`,
# `goto:` buttons, and scene-qualified handler names. Keys drive frames. Prints:
# 100 200 201 1 202 300 6 7 8
program SceneMenus {
import "ludic.core/components.ludic"
property Pos { x: int = 0 }
model Thing { Pos }
var menu_font: int = 0
var frames: int = 0
ui Menu {
panel id: Root w: 100 pad: 4 bg: Color.Gunmetal border: Color.SlateGray align: center {
button id: Go text: "Go" font: menu_font size: 16 w: 80 goto: Play
}
}
scene Splash start lasts 1 then Title { on enter { print(100) } }
scene Title shows Menu {
on enter { print(200) }
on exit { print(202) }
layer L { handler Tick phase Update { frames += 1; if frames == 1 { print(201); emit UiClicked(id: UI_Go) } } }
}
@On(UiClicked) handler Report { print(id) } # UI_Go is widget 1 (the root panel is 0)
scene Play {
on enter { print(300); spawn Thing { Pos { x: 5 } } }
layer Sim {
@Queries(these: [Pos]) handler Tick phase Update { Pos.x += 1; print(Pos.x); if Pos.x >= 8 { quit() } }
}
}
}