Lines

Drawing lines is a common operation when building a UI. In AppCUI there are two methods that cen be used to draw lines (vertical and horizontal) on a surface.

• use special characters to draw the line (like single lines, double lines, etc) that are designed to be used in this context
• use a generic character to draw the line

Using special characters to draw lines

The following methods can be used to draw lines on a surface using special characters:

These methods take a parameter line_type that specifies the type of line that will be drawn. The line type can be one of the following values:

Example:

#![allow(unused)]
fn main() {
use appcui::graphics::{Surface, LineType, CharAttribute, Color};

let mut surface = Surface::new(100, 50);
surface.draw_vertical_line(10, 10, 20, 
                            LineType::Single, 
                            CharAttribute::with_color(Color::White, Color::Black));
}

Using a generic character to draw lines

The following methods can be used to draw lines on a surface using a generic character:

Example:

#![allow(unused)]
fn main() {
use appcui::graphics::{Surface, CharAttribute, Color, Character};

let mut surface = Surface::new(100, 50);
let c = Character::new('=', Color::White, Color::Black, CharFlags::None);
surface.fill_horizontal_line(10, 10, 20, c);
}