Function fltk::draw::draw_frame

pub fn draw_frame(string: &str, x: i32, y: i32, width: i32, height: i32)

Draws a series of line segments around the given box.

The string must contain groups of 4 letters which specify one of 24 standard grayscale values, where ‘A’ is black and ‘X’ is white. The order of each set of 4 characters is: top, left, bottom, right.