Locked room screens
A room display locks its keyboard and mouse the moment someone clicks Start Display. Every key, click, right-click, scroll and touch gesture is swallowed, so a keyboard left on the boardroom table (or a curious hand on the room PC) cannot change what the room sees. The control panel and the presenter remote stay the only ways in.
Presentations are the exception. While a screen is showing a deck, whoever is standing at that machine can walk the slides:
| Keys | Does |
|---|---|
→ ↓ Space PageDown Enter | Next slide |
← ↑ PageUp Backspace Shift+Space | Previous slide |
Home / End | First / last slide |
Those moves go through the server exactly like a tap on the remote, so a second screen on the same deck follows along and the operator's panel always shows where the room really is. In any other mode the keys do nothing at all.
Ctrl,
Alt or Cmd still reaches the browser: blocking
Ctrl+R would strand a wedged screen with no way back.
Esc and F11 still leave full screen, because the browser
acts on them before the page ever sees the key; the display asks for full screen
back and files a warning in the log when it cannot.
&unlock=1 to a
display URL to open it with the lock off: for setup and debugging on the room
machine. The screen logs a warning so an unlocked display is never a mystery.