ludic/examples/library/ui_reload.ludic
Orkuncakilkaya 19fcf60599 wip(0.S3): packages and examples migrated again from their pre-0.S sources in one run
ludic migrate state packages <every example program> packages/ludic.lab/example/plate.ludic
  1804 vars into 126 states, 64 into lets; 23498 edits in 460 files

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-09-25 15:31:34 +03:00

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# ui_reload.ludic — a template read from disk, changed there, and read again by ui_reload: the new
# text shows at once, and the screen's state (a counter pressed before the change) is kept.
import "ludic.ui"
program UiReload {
numbers float
view Note {
title = "note"
}
const PATH: string = "build/ui_reload_example.xml"
const V1: string = "<ui><screen name='note'><state n='{0}'/><button on-click='set n = n + 1'>{title} {n}</button></screen></ui>"
const V2: string = "<ui><screen name='note'><state n='{0}'/><h1>{title} again {n}</h1></screen></ui>"
function shown(ui_st: mut UiState) -> string {
let root: UiNode = ui_nodes(ui_st, "note", view_note())
let first = root.children[0]
if len(first.children) > 0 { return first.children[0].text }
return first.text
}
entry (ui_st: mut UiState) {
Fs.write_text(PATH, V1)
ui_load(ui_st, PATH)
let root: UiNode = ui_nodes(ui_st, "note", view_note())
ui_press(ui_st, root.children[0])
let before = shown(ui_st)
let same = ui_reload(ui_st)
Fs.write_text(PATH, V2)
let changed = ui_reload(ui_st)
print(`{before} | reloaded {same} then {changed} | {shown(ui_st)}`)
}
}