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Petitboot ncurses UI guidelines
General key bindings:
x: Exit the current screen
When the focus is on a text-input field, this key will be treated
litereally (ie, it inputs an 'x' in to the text field). Because of this,
we should avoid putting a text field as the first field on a screen.
We also support 'Esc' as a secondary exit key, but this can cause
problems with some terminals (because Esc is used to initiate an input
escape sequence, it causes ncurses to delay, waiting for more keys).
So, Esc should not be listed as a key in the UI help.
h: Show help
Same restrictions as the 'x' key with text input widgets. We support F1
too, but this is often used by the actual terminal emulator to show help
locally instead.
Form key bindings:
tab: Next widget
shift+tab: Previous widget
down: Next widget
up: Previous widget
Text screen key bindings:
up/down: scroll
Menu key bindings:
up: Next item
down: Previous item
tab: Next item
shift+tab: Previous item
Enter: select item
Space: select item
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