Orkuncakilkaya
66a2bc2214
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>
25 lines
1.8 KiB
Text
25 lines
1.8 KiB
Text
# ui_flex.ludic — ludic.ui's flex layout and stylesheets without a renderer: grow shares the spare
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# room, justify spreads it, a row wraps, align stretches; a stylesheet file (which @imports another)
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# styles whoever imports it, a more specific rule wins, a bound class switches one on, and an attribute beats all.
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import "ludic.ui"
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program UiFlex {
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numbers float
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var picked: int = 1
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view Tags {
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picked = picked
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}
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const BASE: string = "/* base.lss - every text small */\ntext { size: 10 }\n"
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const THEME: string = "/* theme.lss - the base, and a colour for what is on */\n@import \"base.lss\";\n.on { color: #ff0000 }\n"
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const PAGE: string = "<ui>\n<import src='theme.lss'/>\n<style>\nrow.bar { gap: 10; pad: 5 }\ntext.big { size: {picked * 20} }\n</style>\n<screen name='flex' gap='8'>\n <row class='bar' w='fill'>\n <text grow='1'>a</text><text grow='3'>b</text>\n </row>\n <row w='fill' justify='between'><text>l</text><text>m</text><text>r</text></row>\n <row w='200' wrap='true' gap='4'>\n <each in='{range(6)}' as='i'><text w='60' class='{i == picked ? \"on\" : \"\"}'>t{i}</text></each>\n </row>\n <row h='40' align='stretch' w='fill'><col w='30' bg='#00ff00'/><text self='end' class='big' size='12'>x</text></row>\n</screen>\n</ui>\n"
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entry {
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ui_load_text(BASE, "ui/base.lss")
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ui_load_text(THEME, "ui/theme.lss")
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ui_load_text(PAGE, "ui/flex.xml")
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let root: UiNode = ui_nodes("flex", view_tags())
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ui_place(root, 0.0, 0.0, 400.0, 300.0)
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let bar = root.children[0]
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let wrap = root.children[2]
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let tall = root.children[3]
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print(`grow {int(bar.children[0].cw)}:{int(bar.children[1].cw)}; between at {int(root.children[1].children[1].x)}; wrap lines at {int(wrap.children[0].y)}, {int(wrap.children[3].y)}; red {wrap.children[1].fg}; stretched {int(tall.children[0].ch)}; own size {int(tall.children[1].rsize)}`)
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}
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}
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