The whole appliance UI is now configuration for a desktop Debian already ships: a Plasma 6.3 session with a colour scheme, a look and feel package that builds the bar, window rules, and KDE's own Kiosk restrictions. Two things were measured rather than assumed, and both changed a decision. Plasma restarts a crashed panel three times a minute and then gives up, which is the failure a classroom has already had. Four lines of systemd drop-in make it unconditional; the panel then survived eight SIGKILLs a second apart, back each time in 2.4s. Plasma draws a minimised task and a background task identically, so the five states the room needs cannot all be shown. Rather than write a task manager, the classroom removes minimise: clicking a launcher always means show me this. Co-Authored-By: Claude Opus 5 <[email protected]>
49 lines
1.4 KiB
Plaintext
49 lines
1.4 KiB
Plaintext
# Window rules.
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#
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# There are three, they are all about size, and none of them is about
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# stacking. Dialogs staying in front of the window that opened them,
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# secondary windows floating over the main one instead of resizing it, and
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# a print dialog being the window in front are all ordinary window-manager
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# behaviour here, so there is nothing to write down.
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#
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# `types=1` is NET::Normal only. Without it a rule that maximises would
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# also maximise the dialogs, which is exactly the behaviour the classroom
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# is moving away from.
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[General]
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count=3
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rules=classroom-browser,classroom-wonderink,classroom-video
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[classroom-browser]
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Description=The classroom browser fills the screen
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wmclass=google-chrome
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wmclassmatch=1
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wmclasscomplete=false
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types=1
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maximizehoriz=true
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maximizehorizrule=3
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maximizevert=true
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maximizevertrule=3
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[classroom-wonderink]
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Description=Wonder Ink fills the screen
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# Chrome derives this from the --app URL. Measured on a running session
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# rather than guessed; it is also what the launcher's StartupWMClass says,
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# and the two have to agree or the panel shows two buttons for one app.
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wmclass=chrome-app.wonderink.org__-Default
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wmclassmatch=1
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wmclasscomplete=false
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types=1
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maximizehoriz=true
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maximizehorizrule=3
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maximizevert=true
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maximizevertrule=3
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[classroom-video]
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Description=Video is an appliance screen, not a window
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wmclass=vlc
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wmclassmatch=2
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wmclasscomplete=false
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noborder=true
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noborderrule=2
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