Character input UI elements¶
from ui import CharArrowKeysInput
password = CharArrowKeysInput(i, o, message="Password:", name="My password dialog").activate()
if password is None: #UI element exited
return False #Cancelling
#processing the input you received...
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class
ui.char_input.
CharArrowKeysInput
(i, o, initial_value='', message='Value:', allowed_chars=['][S', '][c', '][C', '][s', '][n'], name='CharArrowKeysInput')[source]¶ Implements a character input dialog which allows to input a character string using arrow keys to scroll through characters
Attributes:
value
: A list of characters of the currently displayed valueposition
: Position of the currently edited character.cancel_flag
: A flag that is set when editing is cancelled.in_foreground
: A flag which indicates if UI element is currently displayed. If it’s not active, inhibits any of element’s actions which can interfere with other UI element being displayed.charmap
: Internal string that contains all of the possible character valueschar_indices
: A list containing char’s index incharmap
for every char invalue
listfirst_displayed_char
: An integer pointer to the first character currently displayed (for the occasions where part of value is off-screen)last_displayed_char
: An integer pointer to the last character currently displayed
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__init__
(i, o, initial_value='', message='Value:', allowed_chars=['][S', '][c', '][C', '][s', '][n'], name='CharArrowKeysInput')[source]¶ Initialises the CharArrowKeysInput object.
Args:
i
,o
: input&output device objects
Kwargs:
initial_value
: Value to be edited. If not set, will start with an empty string.allowed_chars
: Characters to be used during input. Is a list of strings designating ranges which can be the following: * ‘][c’ for lowercase ASCII characters * ‘][C’ for uppercase ASCII characters * ‘][s’ for special characters from those supported by HD44780 character maps * ‘][S’ for space * ‘][n’ for numbers * ‘][h’ for hexadecimal characters (0-F) If a string does not designate a range of characters, it’ll be added to character map as-is.message
: Message to be shown in the first row of the displayname
: UI element name which can be used internally and for debugging.
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activate
()[source]¶ A method which is called when input element needs to start operating. Is blocking, sets up input&output devices, renders the element and waits until self.in_background is False, while menu callbacks are executed from the input device thread. This method returns the selected value if KEY_ENTER was pressed, thus accepting the selection. This method returns None when the UI element was exited by KEY_LEFT and thus the value was not accepted.