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feat: a lesson in Wonder Ink is the size the browser shows it, and zooms

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Teachers found lessons in Wonder Ink too small next to the ordinary
browser. Measured by asking each page for devicePixelRatio: Wonder Ink
follows the display scale exactly (dpr 1.5 at 150%), and Chrome is
scaled TWICE (dpr 2.25) — under Plasma it follows the compositor itself
and classroom-browser also forces UI_SCALE, a flag from the sway session.

The browser is left as it is. Wonder Ink's pages start at zoom =
UI_SCALE, the room's own number (1.0 at 100%), and measured afterwards
match the browser: dpr 2.25 and 853 px against 2.25 and 854. The window
is not zoomed; Qt scales it once, correctly.

Ctrl+Plus/=/keypad, Ctrl+Minus, Ctrl+0, Ctrl+wheel and the right-click
menu set one level for every tab, remembered as LEVEL= in its own file,
relative to the room. Two actions on one key are ambiguous to Qt and it
then does neither — Ctrl+Minus did nothing until each command became one
action with all its keys, which also fixes Ctrl+Shift+Tab.

The engine profile is built by one function, which the lab's checks now
use: a check with its own profile showed every worksheet blank.

The lab fences 10.10.0.0/16 as well: the development host reaches the
real Elmer over Tailscale, and the lab provisions a queue pointing at it.
Four lab checks written for older code are corrected; one had failed on
every run since 0.2.3.

tools/lab/wonderink-zoom-check: 18 checks. Lab: converged 120, print 39,
worksheets 24, all passing.

Co-Authored-By: Claude Opus 5.5 <[email protected]>
This commit is contained in:
ekklesia
2026-09-23 19:04:58 -05:00
co-authored by Claude Opus 5.5
parent 10433b850d
commit 48b3097c43
7 changed files with 527 additions and 62 deletions
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tests/test-deployment-support.sh
+10 -2
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@@ -305,9 +305,17 @@ check("and asks the one command for it",
# UI_SCALE=2.0: kscreen-doctor reports the output at scale 2, and a Qt
# client on that session reports devicePixelRatio 2.0 without being told
# anything. Forcing it as well would apply the scale twice.
wonderink_code = "\n".join(line for line in wonderink.splitlines()
if not line.lstrip().startswith("#"))
check("Wonder Ink is not told twice",
"force-device-scale-factor" not in wonderink
and "QT_SCALE_FACTOR" not in wonderink)
"force-device-scale-factor" not in wonderink_code
and "QT_SCALE_FACTOR" not in wonderink_code)
# Its PAGES are, because Chrome under Plasma turned out to be scaled twice
# (dpr 2.25 at 150%, measured) and a lesson has to be the size teachers
# read it at in the browser. The window itself is left to Qt.
check("its pages start at the room's scale, which is the browser's size",
"room_zoom=ui_scale(config)" in wonderink_code
and "self._room_zoom * self._level" in wonderink_code)
check("the clock is sized by the bar, not by a number",
'autoFontAndSize", true' in layout and "fontSize" not in layout)