Pedro M. de Echanove Pasquin
ce893ac776
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`.
125 lines
2.9 KiB
Rust
125 lines
2.9 KiB
Rust
#![ cfg( feature = "test-support" ) ]
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use ltk::test_support::
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{
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value_from_y_in_rect,
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value_from_pos_in_rect,
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thumb_design_px,
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SliderAxis,
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};
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use ltk::{ Point, Rect };
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fn rect( x: f32, y: f32, w: f32, h: f32 ) -> Rect
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{
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Rect { x, y, width: w, height: h }
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}
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#[ test ]
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fn top_is_one()
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{
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let r = rect( 0.0, 0.0, 56.0, 160.0 );
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assert_eq!( value_from_y_in_rect( r, 0.0 ), 1.0 );
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assert_eq!( value_from_y_in_rect( r, -50.0 ), 1.0 );
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}
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#[ test ]
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fn bottom_is_zero()
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{
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let r = rect( 0.0, 0.0, 56.0, 160.0 );
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assert_eq!( value_from_y_in_rect( r, 160.0 ), 0.0 );
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assert_eq!( value_from_y_in_rect( r, 999.0 ), 0.0 );
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}
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#[ test ]
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fn center_returns_half()
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{
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let r = rect( 0.0, 0.0, 56.0, 160.0 );
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let v = value_from_y_in_rect( r, 80.0 );
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assert!( ( v - 0.5 ).abs() < 1e-6, "expected 0.5 got {}", v );
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}
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#[ test ]
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fn rect_offset_translates_correctly()
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{
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let r = rect( 0.0, 500.0, 56.0, 160.0 );
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assert_eq!( value_from_y_in_rect( r, 500.0 ), 1.0 );
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assert_eq!( value_from_y_in_rect( r, 660.0 ), 0.0 );
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let v = value_from_y_in_rect( r, 580.0 );
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assert!( ( v - 0.5 ).abs() < 1e-6, "expected 0.5 got {}", v );
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}
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#[ test ]
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fn output_is_always_in_unit_range()
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{
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let r = rect( 10.0, 10.0, 56.0, 200.0 );
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for y in -100i32 ..= 400
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{
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let v = value_from_y_in_rect( r, y as f32 );
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assert!( ( 0.0..= 1.0 ).contains( &v ), "v={} out of range at y={}", v, y );
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}
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}
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#[ test ]
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fn very_short_rect_does_not_divide_by_zero()
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{
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// Height < 1.0 — track_h is clamped to 1.0 internally so the formula
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// stays defined.
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let r = rect( 0.0, 0.0, 56.0, 0.1 );
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let v = value_from_y_in_rect( r, 0.05 );
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assert!( v.is_finite() );
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assert!( ( 0.0..= 1.0 ).contains( &v ) );
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}
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#[ test ]
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fn value_is_monotonically_decreasing_along_y()
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{
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// Moving downward inside the pill must never *increase* the value —
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// the invariant behind the "drag up = larger" UX contract.
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let r = rect( 0.0, 0.0, 56.0, 160.0 );
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let mut prev = value_from_y_in_rect( r, 0.0 );
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for y in 0 ..= 160
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{
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let v = value_from_y_in_rect( r, y as f32 );
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assert!( v <= prev + 1e-6, "not monotonic: y={} v={} prev={}", y, v, prev );
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prev = v;
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}
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}
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#[ test ]
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fn value_from_pos_dispatches_horizontal()
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{
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let r = rect( 0.0, 0.0, 200.0, 36.0 );
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let v = value_from_pos_in_rect(
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r,
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Point { x: 200.0, y: 0.0 },
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SliderAxis::Horizontal,
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thumb_design_px(),
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);
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assert_eq!( v, 1.0 );
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}
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#[ test ]
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fn value_from_pos_dispatches_vertical()
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{
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let r = rect( 0.0, 0.0, 56.0, 160.0 );
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let v = value_from_pos_in_rect(
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r,
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Point { x: 9_999.0, y: 0.0 },
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SliderAxis::Vertical,
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thumb_design_px(),
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);
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assert_eq!( v, 1.0 );
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}
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#[ test ]
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fn value_from_pos_axes_are_independent()
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{
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let r = rect( 0.0, 0.0, 200.0, 200.0 );
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let h = value_from_pos_in_rect(
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r, Point { x: 100.0, y: 0.0 }, SliderAxis::Horizontal, thumb_design_px() );
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let v = value_from_pos_in_rect(
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r, Point { x: 0.0, y: 100.0 }, SliderAxis::Vertical, thumb_design_px() );
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assert!( ( h - 0.5 ).abs() < 0.1 );
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assert!( ( v - 0.5 ).abs() < 1e-6 );
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}
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