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Responsive scaling. ltk now offers two first-class ways to size a UI so it adapts across screens, chosen per process via `WidgetScaling { Fluid, Physical }` (`set_widget_scaling` / `widget_scaling`, default `Fluid`). Fluid sizing (`Length::fluid( px )`) makes a design pixel a proportion of the surface's smaller side, calibrated against a reference width (`set_fluid_reference` / `fluid_reference`, 412 px default) and bounded by `FLUID_MIN` / `FLUID_MAX`; physical sizing (`Length::dp( px )`) is a constant-physical-size pixel scaled by display density (`set_density` / `density`). `Length` gains `orient( portrait, landscape )` — resolve one value in portrait, another in landscape — plus `widget( px )`, which picks fluid or dp per the active mode. Canvas exposes `geom_px` (geometry, resolved in physical layout space) and `font_px` (font size, bridging logical / physical per mode) so widgets and apps share one resolution path. Note the rename: `set_design_reference` / `design_reference` became `set_fluid_reference` / `fluid_reference`, and `Length::dp` changed meaning — the old surface-proportional behaviour now lives on `Length::fluid`.
Widgets. Every stock widget resolves its default geometry and font through the widget-scaling mode instead of frozen pixels, so a whole UI scales coherently without per-call units. New size builders where they were missing: `button` gains `font_size` / `height`, `text_edit` gains `height` / `font_size_fluid`, `separator` gains `pad_v`, and assorted widgets accept a `Length` where they previously took only `f32`.
Overlays. `OverlaySpec::size` is now `( Length, Length )` instead of `( u32, u32 )`, resolved against the main surface when the overlay is materialized, so overlays can scale with the display; `Length::px( … )` reproduces the old fixed sizing.
API stabilization (toward 1.0). Widget struct fields are now `pub( crate )` — they are configured through builders, not field access — except the value / state types apps genuinely read or construct (`Time`, `Date`, `ComboState`), which stay public. The internal `test_support` helpers move behind a `test-support` Cargo feature (off by default, so third-party builds never see them; ltk's own `make test` enables it). `Separator` drops its `0.0`-means-mode sentinel for `Option<Length>`, so an explicit `pad_v( 0.0 )` is a real flush divider distinct from the mode-following default.
Performance guardrails. Opt-in diagnostics via `LTK_PERF_WARN=1` warn about stuck animations, sustained software-render animation, and low `poll_interval`; software-rendered animation is capped near 30 Hz to spare CPU on machines that fall back off EGL. Apps can override the cap with `App::cap_software_animation`.
Docs and build. The two scaling modes are documented in README, onboarding and architecture, with the earlier gradient / backdrop doc drift cleaned up. The Makefile now ships the `locales/` directory into the packaged crate (fixing i18n keys rendering raw for downstreams), builds the new `responsive` example, and runs tests with `--features test-support`.
53 lines
1.9 KiB
Rust
53 lines
1.9 KiB
Rust
// SPDX-License-Identifier: LGPL-2.1-only
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// Copyright (C) 2026 Liberux Labs, S. L. <info@liberux.net>
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use super::*;
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use crate::render::Canvas;
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#[ test ]
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fn default_size_follows_widget_scaling()
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{
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let _g = crate::TEST_GLOBALS_LOCK.lock().unwrap_or_else( |e| e.into_inner() );
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let canvas = Canvas::new( 412, 412 );
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let b = window_button::<()>( WindowButtonKind::Close );
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let s = canvas.geom_px( theme::SIZE );
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assert_eq!( b.preferred_size( 1000.0, &canvas ), ( s, s ) );
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}
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#[ test ]
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fn controls_has_three_children()
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{
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let controls = window_controls::<()>(
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Some( () ), WindowButtonKind::Maximize, Some( () ), Some( () ),
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);
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assert_eq!( controls.children.len(), 3 );
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}
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#[ test ]
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fn icon_names_resolve_each_kind_to_the_window_catalogue()
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{
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// Lock the catalogue paths so a future rename of the on-disk
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// SVG (e.g. close.svg → x.svg) breaks this test instead of
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// silently falling back to the programmatic glyph at runtime.
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assert_eq!( icon_name( WindowButtonKind::Minimize ), "window/minimize" );
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assert_eq!( icon_name( WindowButtonKind::Maximize ), "window/maximize" );
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assert_eq!( icon_name( WindowButtonKind::Restore ), "window/restore" );
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assert_eq!( icon_name( WindowButtonKind::Close ), "window/close" );
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}
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#[ test ]
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fn paint_bounds_unchanged_after_glyph_refactor()
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{
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// The SVG glyph paints inside the button rect just like the
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// programmatic one did, so paint_bounds must stay equal to
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// the previous value (rect expanded by the focus-ring slack).
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let b = window_button::<()>( WindowButtonKind::Close );
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let rect = Rect { x: 10.0, y: 10.0, width: 36.0, height: 36.0 };
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let bounds = b.paint_bounds( rect );
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let slack = theme::FOCUS_W * 1.5 + 2.0;
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assert!( ( bounds.x - ( rect.x - slack ) ).abs() < 0.01 );
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assert!( ( bounds.y - ( rect.y - slack ) ).abs() < 0.01 );
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assert!( ( bounds.width - ( rect.width + slack * 2.0 ) ).abs() < 0.01 );
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assert!( ( bounds.height - ( rect.height + slack * 2.0 ) ).abs() < 0.01 );
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}
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