- flex-shrink: a line whose children want more room than it has takes it back from those that
shrink, in proportion to shrink times size and never below a min size, a fixed size or the
content. A scroll box shrinks (and scrolls), and a box in a column shrinks as far as the scroll
boxes inside it let it, so a list in a column takes the room its siblings leave with no height.
`flex: grow shrink`, and `flex-shrink` by name.
- A row wider than its room measures its texts (and boxes without a width) again in the room the
rest leave them, so a line wraps beside an icon.
- calc() with + - * / and brackets over px, %, em, rem, vw, vh, plain numbers and var(); a width
or height keeps its percentage, taken of the room it is given. Lengths lists (padding, margin)
keep a calc()'s spaces.
- `order` places a box's children without touching the tree.
- width: 0 and height: 0 are 0: an unset size is UI_AUTO now, not 0.
- A component root that is itself a component takes each user's class, style and id in turn (the
outermost's id wins), and the rules of all their sheets are weighed by specificity together; a
user's rule wins a tie. The parent's sheet used to override the child's whatever its specificity,
and a middle component's sheet was lost.
- The default sheet lays .ui-track out as a row, so a range's fill is as tall as its track and a
checked box's knob goes right; a range's thumb is centred on the fill's end.
- ui_boxes.ludic.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
- `popover`: a top layer that keeps the pointer and the keyboard, closed by a press outside or Esc.
- `title` tooltips after half a second's rest, styled by .ui-tooltip.
- `<progress>` and `<meter>`.
- Atlases take rows and number cells, and importing ludic.ui/render3d.ludic is enough to draw with
render3d.
- The compiler reports two declarations of one name before it type-checks, so a package global
clashing with a program's reads as that, not as 29 type errors.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
A game no longer writes a host:
- The runtime reads Input itself: focus and keyboard navigation (Tab, arrows, Enter/Space,
autofocus), the pointer (hover, :active, click on release, drag), and scroll boxes with the
wheel, a draggable scrollbar, clipping and scroll-into-view.
- HTML's controls are built in (button, checkbox, radio, range, select, text, key capture), made
of plain parts a stylesheet styles, each reporting with on-change and event.value.
- ludic.ui/render3d.ludic draws with render3d's overlay: textures, named atlases (icon:NAME),
nine-slice border-image, rounded rects and rings, clipping, and a scale.
- Hooks for the program's language, sounds and clock (ui_translator, ui_sounds, ui_clock).
- ui_dev: hot reload, errors on screen, LUDIC_UI_DUMP.
- CSS:
- colours as #rgb / #rrggbbaa / rgb() / rgba() / names;
- border-radius and outline (following the radius), box-shadow, background-image and a tinted
border-image;
- group opacity, @keyframes / animation, transition;
- :focus, :focus-visible and :focus-within.
- HTML mixed content, and boolean attributes.
- render3d gains tex_width / tex_height, and the XML reader keeps text runs in order.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The compiler turns a component declaration into:
- a record of its props and state;
- a constructor, a props setter, a model and a call;
- a class, registered with ludic.ui at start.
Its template and styles are read from beside it and compiled in, with @import inlined, and a
missing template fails the build.
In the runtime:
- each mounted instance keeps its own props and state, and `set` in a template writes the state;
- styles are scoped to the component;
- class, style and id on a component's tag land on its root, styled by the parent's sheet too;
- ui_reload re-reads a component's files from disk and keeps instances.
The package's own module is now ludic_ui, so a program may call a directory of its own ui.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
- Natives: ui_native(tag, measure, draw) makes an element the program draws itself; ui_fire
runs its on-<event> with event.value. input, select and textarea have simple defaults.
- React:
- keyed <each>, <let>, <provide> context through components, <fragment>;
- named slots, default props on <component>;
- on-mount / on-unmount;
- inline text inside text elements.
- CSS:
- custom properties and var();
- position relative/absolute/fixed with insets and z-index;
- em/rem/vw/vh and @media;
- wrapping text and ellipsis, overflow;
- + and ~ combinators, :nth-child(an+b), :checked, :active.
- Developing: errors with file:line, ui_errors(), ui_reload() keeping state, and an
inspector-style ui_dump.
- view fields infer the type of a literal or a named function's result.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
A `view Name { field = x; function q(..); on e(..) }` declaration is the one bridge between a
program and its UI: it writes view_<name>() -> UiView, whose model is a Value of every field and
whose call runs a query or an event by name.
ludic.ui is a template runtime:
- HTML-shaped XML screens and components, loaded at run time;
- {expression} bindings, if/else/each, props, slots, per-instance state;
- on-press / onclick actions (event, set, emit);
- component libraries (export="true", <import src as>).
Styling:
- stylesheets in <style> or importable .lss files (@import);
- CSS selectors (#id, .class, [attr=v], descendant and > combinators, :hover, :disabled,
:first-child, :last-child, :nth-child, :not) weighed by specificity;
- the box model and flex under CSS's property names.
Also:
- default parameters, and positional-then-named calls;
- Value gains a float kind;
- a function shadowing a runtime one is refused;
- an index is evaluated before the slice is read;
- runtime errors name the right file.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
