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Create explicit Thumbnail struct in gallery example

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Héctor Ramón Jiménez 2025-02-09 08:12:04 +01:00
parent ec4d007a4c
commit 80ccbb8357
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GPG key ID: 7CC46565708259A7
2 changed files with 46 additions and 45 deletions
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90
examples/gallery/src/main.rs
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@ -202,23 +202,18 @@ fn card<'a>(
now: Instant,
) -> Element<'a, Message> {
let image = if let Some(preview) = preview {
let thumbnail: Element<'_, _> = if let Preview::Ready {
thumbnail,
fade_in,
zoom,
..
} = &preview
{
image(thumbnail)
.width(Fill)
.height(Fill)
.content_fit(ContentFit::Cover)
.opacity(fade_in.interpolate(0.0, 1.0, now))
.scale(zoom.interpolate(1.0, 1.1, now))
.into()
} else {
horizontal_space().into()
};
let thumbnail: Element<'_, _> =
if let Preview::Ready { thumbnail, .. } = &preview {
image(&thumbnail.handle)
.width(Fill)
.height(Fill)
.content_fit(ContentFit::Cover)
.opacity(thumbnail.fade_in.interpolate(0.0, 1.0, now))
.scale(thumbnail.zoom.interpolate(1.0, 1.1, now))
.into()
} else {
horizontal_space().into()
};
if let Some(blurhash) = preview.blurhash(now) {
let blurhash = image(&blurhash.handle)
@ -273,9 +268,7 @@ enum Preview {
},
Ready {
blurhash: Option<Blurhash>,
thumbnail: image::Handle,
fade_in: Animation<bool>,
zoom: Animation<bool>,
thumbnail: Thumbnail,
},
}
@ -284,6 +277,12 @@ struct Blurhash {
fade_in: Animation<bool>,
}
struct Thumbnail {
handle: image::Handle,
fade_in: Animation<bool>,
zoom: Animation<bool>,
}
impl Preview {
const WIDTH: u32 = 320;
const HEIGHT: u32 = 410;
@ -304,15 +303,7 @@ impl Preview {
fn ready(rgba: Rgba) -> Self {
Self::Ready {
blurhash: None,
thumbnail: image::Handle::from_rgba(
rgba.width,
rgba.height,
rgba.pixels,
),
fade_in: Animation::new(false).slow().go(true),
zoom: Animation::new(false)
.quick()
.easing(animation::Easing::EaseInOut),
thumbnail: Thumbnail::new(rgba),
}
}
@ -323,29 +314,22 @@ impl Preview {
Self::Ready {
blurhash: Some(blurhash),
thumbnail: image::Handle::from_rgba(
rgba.width,
rgba.height,
rgba.pixels,
),
fade_in: Animation::new(false).slow().go(true),
zoom: Animation::new(false)
.quick()
.easing(animation::Easing::EaseInOut),
thumbnail: Thumbnail::new(rgba),
}
}
fn toggle_zoom(&mut self, enabled: bool) {
if let Self::Ready { zoom, .. } = self {
zoom.go_mut(enabled);
if let Self::Ready { thumbnail, .. } = self {
thumbnail.zoom.go_mut(enabled);
}
}
fn is_animating(&self, now: Instant) -> bool {
match &self {
Self::Loading { blurhash } => blurhash.fade_in.is_animating(now),
Self::Ready { fade_in, zoom, .. } => {
fade_in.is_animating(now) || zoom.is_animating(now)
Self::Ready { thumbnail, .. } => {
thumbnail.fade_in.is_animating(now)
|| thumbnail.zoom.is_animating(now)
}
}
}
@ -355,10 +339,26 @@ impl Preview {
Self::Loading { blurhash, .. } => Some(blurhash),
Self::Ready {
blurhash: Some(blurhash),
fade_in,
thumbnail,
..
} if fade_in.is_animating(now) => Some(blurhash),
_ => None,
} if thumbnail.fade_in.is_animating(now) => Some(blurhash),
Self::Ready { .. } => None,
}
}
}
impl Thumbnail {
pub fn new(rgba: Rgba) -> Self {
Self {
handle: image::Handle::from_rgba(
rgba.width,
rgba.height,
rgba.pixels,
),
fade_in: Animation::new(false).slow().go(true),
zoom: Animation::new(false)
.quick()
.easing(animation::Easing::EaseInOut),
}
}
}