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qbz/crates/qbz-slint/ui/discover/HomeSkeleton.slint
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vicrodh 2dc6726c3b feat(slint): discover home loading skeleton + paginated slim carousels
Three of the four Discover > Home quick-wins.

Loading skeleton (#1):
  - New HomeSkeleton replaces the spinner + "Loading your music…"
    text shown while the first fetch is in flight. Grey placeholder
    blocks shaped like two real carousels (title bar + a row of
    square art with two text lines), gently pulsing via a shared
    900ms Timer phase + animate opacity — no more artifact titles
    during load.

Recently Played Tracks + Popular albums (#3, #4):
  - New SlimCarousel: a paginated 4x3 slim-card grid (12 per page),
    capped at two pages, sliding one viewport width per page. The
    prev/next controls only appear when there is a second page
    (>12 items); 12 or fewer renders as a single static page with
    no arrows. Replaces the old non-paginated GridSection that grew
    into a tall wall of rows.
  - home.rs caps `recent` and `popular` to 24 items (two pages) so
    the carousel never has hidden overflow; the Popular/Recent
    artwork-job indices are unchanged.

GridSection is retained — the artist ReleaseGrid still uses it.

Note on #2 (Recently Played Albums "spurious AlbumCard"): there is
only one AlbumCard component (discover/AlbumCard.slint, used by 5
call sites incl. this carousel via Carousel) — no duplicate to
delete. The cards look bare because the local play-history store
keeps only id/title/artist/artwork (no quality/year/ribbon), not
because of a different component.

cc
2026-05-20 21:58:36 -06:00

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// Loading skeleton for the Discover home — grey placeholder blocks
// shaped like the real carousels, gently pulsing (fade in/out) while
// the first fetch is in flight. Replaces the spinner + "Loading…"
// text so the first paint reads as the page filling in rather than a
// generic loader.
import { Theme } from "../foundation/semantic-colors.slint";
import { Radius } from "../foundation/radius.slint";
// A single shimmering block. Opacity breathes between two values on a
// shared phase so the whole skeleton pulses in unison.
component Shimmer inherits Rectangle {
in property <bool> phase;
background: Theme.surface-elevated;
border-radius: Radius.sm;
opacity: root.phase ? 0.85 : 0.4;
animate opacity { duration: 900ms; easing: ease-in-out; }
}
// One placeholder carousel: a short title bar over a row of card
// blocks (square art + two text lines).
component SkeletonRow inherits VerticalLayout {
in property <bool> phase;
in property <length> card-size: 220px;
spacing: 12px;
Shimmer {
phase: root.phase;
width: 180px;
height: 22px;
}
HorizontalLayout {
spacing: 32px;
for _ in [0, 1, 2, 3, 4]: VerticalLayout {
spacing: 8px;
Shimmer {
phase: root.phase;
width: root.card-size;
height: root.card-size;
}
Shimmer {
phase: root.phase;
width: root.card-size * 0.7;
height: 14px;
}
Shimmer {
phase: root.phase;
width: root.card-size * 0.45;
height: 12px;
}
}
}
}
export component HomeSkeleton inherits VerticalLayout {
property <bool> phase: false;
spacing: 40px;
// Drives the shared breathing phase.
Timer {
interval: 900ms;
running: true;
triggered => {
root.phase = !root.phase;
}
}
SkeletonRow { phase: root.phase; }
SkeletonRow { phase: root.phase; }
}