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Scale

Struct Scale 

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pub struct Scale(pub f32);
Expand description

表示 scale — 論理 px の token 値を物理 px へ変換する倍率。

creo-ui の dimension token は 論理 px (crate docs の契約表参照)。 wgpu / glyphon のような物理ピクセル基準の生描画では、window の scale factor を ここに包んで描画直前に Scale::px を通す:

use creo_ui::{tokens, Scale};

let scale = Scale::new(2.0); // 例: Retina。実際は window.scale_factor() 等から
let font_px = scale.px(tokens::TYPOGRAPHY_SIZE_M); // 論理 px → 物理 px (2 倍)
assert_eq!(font_px, tokens::TYPOGRAPHY_SIZE_M * 2.0);

glyphon なら TextArea.scale にそのまま factor を渡す手もある。padding や 配置座標など layout 値も論理で組み、同じ Scale を通すこと (文字だけ 掛けると余白と釣り合いが崩れる)。

Default は意図的に実装しない — 「黙って 1.0」は Retina で半分サイズになる bug (scale 掛け忘れ) をそのまま既定化してしまうため、factor は常に明示する。

Tuple Fields§

§0: f32

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impl Scale

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pub const ONE: Scale

等倍 (非 HiDPI)。テストや scale 非対応環境での明示的な選択肢。

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pub fn new(factor: f64) -> Scale

window / surface の scale factor から作る。 winit: window.scale_factor() / AppKit: NSView.backingScaleFactor

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pub fn px(self, logical: f32) -> f32

論理 px の dimension token を物理 px へ。

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impl Clone for Scale

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fn clone(&self) -> Scale

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Copy for Scale

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impl Debug for Scale

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl PartialEq for Scale

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fn eq(&self, other: &Scale) -> bool

Equality operator ==. Read more
1.0.0 (const: unstable) · Source§

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=. Read more
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impl StructuralPartialEq for Scale

Auto Trait Implementations§

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impl Freeze for Scale

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impl RefUnwindSafe for Scale

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impl Send for Scale

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impl Sync for Scale

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impl Unpin for Scale

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impl UnsafeUnpin for Scale

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impl UnwindSafe for Scale

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.