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feat(ui): linear-gradient backgrounds, object-fit and aspect-ratio

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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Orkun ÇAKILKAYA 2026-09-24 22:02:49 +03:00
parent abf45ef9db
commit 7605a0253c
18 changed files with 248 additions and 4 deletions
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examples/library/ui_fill.ludic Normal file
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# ui_fill.ludic — linear-gradient backgrounds (a direction or an angle, stops placed or spread) drawn
# as whole-pixel bands; object-fit contain and cover for a picture of its own size; aspect-ratio
# making a height from a width, and a native's width from its height.
import "ludic.ui"
program UiFill {
numbers float
var rects: []string = new []string
var pics: []string = new []string
var clips: int = 0
const STYLE: string = "<style>.g { width: 100px; height: 20px; background: linear-gradient(to right, #000000, #ffffff) }\n.h { width: 50px; height: 40px; background-image: linear-gradient(180deg, #ff0000 0%, #0000ff 50%, #0000ff) }\nimg { width: 100px; height: 100px }\n.contain { object-fit: contain }\n.cover { object-fit: cover }\n.r { width: 160px; aspect-ratio: 16 / 9 }\nknob { height: 30px; aspect-ratio: 2 }</style>"
const BODY: string = "<screen name='f'><div class='g'/><div class='h'/><img class='contain' src='wide.png'/><img class='cover' src='wide.png'/><div class='r'/><row><knob/></row></screen>"
function rec_rect(x: float, y: float, w: float, h: float, c: int, a: float) -> void { push(rects, `{int(x)},{int(y)} {int(w)}x{int(h)} {ui_hex(c)}`) }
function rec_image(src: string, x: float, y: float, w: float, h: float, c: int, a: float) -> void { push(pics, `{int(x)},{int(y)} {int(w)}x{int(h)}`) }
function rec_clip(x: float, y: float, w: float, h: float) -> void { clips += 1 }
function no_clip() -> void { }
function no_text(x: float, y: float, s: string, size: float, c: int, a: float) -> void { }
function nat_w(src: string) -> float { return 200.0 }
function nat_h(src: string) -> float { return 100.0 }
function knob_measure(n: UiNode, avail: float) -> void { }
function knob_draw(n: UiNode) -> void { }
entry {
let b = new UiBackend
b.rect = fn rec_rect
b.text = fn no_text
b.image = fn rec_image
b.image_w = fn nat_w
b.image_h = fn nat_h
b.clip = fn rec_clip
b.unclip = fn no_clip
ui_backend(b)
ui_native("knob", fn knob_measure, fn knob_draw)
ui_load_text("<ui>" + STYLE + BODY + "</ui>", "f.xml")
ui_show("f", null, 0.0, 0.0, 400.0, 600.0)
let r: UiNode = ui_nodes("f", null)
ui_place(r, 0.0, 0.0, 400.0, 600.0)
let n = len(rects)
print(`{rects[0]} .. {rects[49]} | {rects[50]} .. {rects[59]} .. {rects[69]} of {n} | {pics[0]} | {pics[1]} clipped {clips} | ratio {int(r.children[4].ch)} knob {int(r.children[5].children[0].cw)}`)
}
}