Trait AsciiView

pub trait AsciiView {
    // Required methods
    fn columns(&self) -> usize;
    fn read_char(&mut self, row: usize, column: usize) -> char;
    fn write_char(&mut self, row: usize, column: usize, ch: char, style: Style);
}

AsciiView is a view onto an AsciiCanvas which potentially applies transformations along the way (e.g., shifting, adding styling information). Most of the main drawing methods for AsciiCanvas are defined as inherent methods on an AsciiView trait object.

Required Methods

fn columns(&self) -> usize

fn read_char(&mut self, row: usize, column: usize) -> char

fn write_char(&mut self, row: usize, column: usize, ch: char, style: Style)

Implementations

impl<'a> dyn AsciiView + 'a

pub fn draw_vertical_line(&mut self, rows: Range<usize>, column: usize)

Draws a line for the given range of rows at the given column.

pub fn draw_horizontal_line(&mut self, row: usize, columns: Range<usize>)

Draws a horizontal line along a given row for the given range of columns.

pub fn write_chars<I>( &mut self, row: usize, column: usize, chars: I, style: Style, )

where I: Iterator<Item = char>,

Writes characters in the given style at the given position.

pub fn shift(&mut self, row: usize, column: usize) -> ShiftedView<'_>

Creates a new view onto the same canvas, but writing at an offset.

pub fn styled(&mut self, style: Style) -> StyleView<'_>

Creates a new view onto the same canvas, but applying a style to all the characters written.

Implementors

impl AsciiView for AsciiCanvas

impl<'canvas> AsciiView for ShiftedView<'canvas>

impl<'canvas> AsciiView for StyleView<'canvas>