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Wallpaper: restore the user's desktop when going dormant

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The wallpaper maker/runtime overrides the desktop with the cockpit
wallpaper on profile activation but never put the user's own back.
Now RioCoordinator captures the current wallpaper (SPI_GETDESKWALLPAPER,
via new WallpaperApplier.GetCurrent) the first time it overrides it, and
restores it (WallpaperApplier.Restore) on every GoDormant and on Dispose
— so going idle, a native game taking the port, or app exit returns the
desktop to what the user had. Capture is once-per-override so switching
between cockpit profiles keeps the real previous wallpaper; only engages
when OverlayTemplatePath is set. Builds clean on net48 + net40.

Known gap (documented in PLAN.md): a hard crash between apply and restore
leaves the cockpit wallpaper, since SPIF_UPDATEINIFILE persists it.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
Cyd
2026-07-19 22:15:20 -05:00
co-authored by Claude Fable 5
parent 30c1a85445
commit 46961d0cd1
3 changed files with 80 additions and 3 deletions
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docs/PLAN.md
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@@ -254,8 +254,15 @@ Replaces the legacy Google-Sheet → `.data` → GIMP → Script-Fu pipeline
generates + applies the wallpaper on profile activation when
`AppConfig.OverlayTemplatePath` is set (best-effort, off by default, never breaks
activation). The live `SystemParametersInfo` apply changes a user setting, so it
is gated behind config and not exercised by tests. ⏳ Optional: restore the prior
wallpaper when going dormant.
is gated behind config and not exercised by tests. **Restore-on-dormant — done ✅:**
`RioCoordinator` captures the user's own wallpaper (`WallpaperApplier.GetCurrent`)
the first time it overrides it, and puts it back (`WallpaperApplier.Restore`) on
every `GoDormant` and on `Dispose` — so idle/native-game/exit return the desktop
to what the user had. Capture is once-per-override (switching between cockpit
profiles never records a cockpit wallpaper as the "previous"); only engages when
`OverlayTemplatePath` is set. Known gap: a hard crash between apply and restore
leaves the cockpit wallpaper (SPIF_UPDATEINIFILE persists it) — a future
crash-recovery could persist the saved path to config.
- **Wallpaper maker — done ✅.** `RioJoy.Tray/Editor/WallpaperMakerForm` (tray →
"Wallpaper maker") is the interactive replacement for the Sheet → GIMP pipeline:
it renders the profile's wallpaper live on the template base image, outlines all