Struct Keypad 

pub struct Keypad { /* private fields */ }

The keypad layout - a 5x4 grid of buttons

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Implementations

impl Keypad

pub fn new() -> Self

Creates a new standard calculator keypad

pub fn button_count(&self) -> usize

Returns the number of buttons

pub fn dimensions(&self) -> (usize, usize)

Returns the grid dimensions (rows, cols)

pub fn get_button(&self, index: usize) -> Option<&KeypadButton>

Gets a button by index

pub fn get_button_mut(&mut self, index: usize) -> Option<&mut KeypadButton>

Gets a mutable button by index

pub fn get_button_at(&self, row: usize, col: usize) -> Option<&KeypadButton>

Gets a button by row and column

pub fn find_button_by_label(&self, label: char) -> Option<usize>

Finds a button by its label character

pub fn find_button_by_char(&self, ch: char) -> Option<usize>

Finds a button by the character it would insert

pub fn press_button(&mut self, index: usize)

Sets a button as pressed by index

pub fn release_all(&mut self)

Releases all buttons

pub fn highlight_char(&mut self, ch: char)

Highlights the button corresponding to a character

pub fn buttons(&self) -> impl Iterator<Item = &KeypadButton>

Returns an iterator over all buttons

pub fn buttons_with_positions( &self, ) -> impl Iterator<Item = ((usize, usize), &KeypadButton)>

Returns an iterator over buttons with their (row, col) positions

pub fn hit_test(&self, area: Rect, x: u16, y: u16) -> Option<usize>

Converts a click position to button index

Trait Implementations

impl Clone for Keypad

fn clone(&self) -> Keypad

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Keypad

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Keypad

fn default() -> Self

Returns the “default value” for a type.