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use unicode_width::UnicodeWidthStr;
use buffer::Buffer;
use layout::Rect;
use style::{Color, Style};
use widgets::{Block, Widget};
pub struct Gauge<'a> {
block: Option<Block<'a>>,
percent: u16,
label: Option<&'a str>,
style: Style,
}
impl<'a> Default for Gauge<'a> {
fn default() -> Gauge<'a> {
Gauge {
block: None,
percent: 0,
label: None,
style: Default::default(),
}
}
}
impl<'a> Gauge<'a> {
pub fn block(mut self, block: Block<'a>) -> Gauge<'a> {
self.block = Some(block);
self
}
pub fn percent(mut self, percent: u16) -> Gauge<'a> {
self.percent = percent;
self
}
pub fn label(mut self, string: &'a str) -> Gauge<'a> {
self.label = Some(string);
self
}
pub fn style(mut self, style: Style) -> Gauge<'a> {
self.style = style;
self
}
}
impl<'a> Widget for Gauge<'a> {
fn draw(&mut self, area: Rect, buf: &mut Buffer) {
let gauge_area = match self.block {
Some(ref mut b) => {
b.draw(area, buf);
b.inner(area)
}
None => area,
};
if gauge_area.height < 1 {
return;
}
if self.style.bg != Color::Reset {
self.background(&gauge_area, buf, self.style.bg);
}
let center = gauge_area.height / 2 + gauge_area.top();
let width = (gauge_area.width * self.percent) / 100;
let end = gauge_area.left() + width;
for y in gauge_area.top()..gauge_area.bottom() {
for x in gauge_area.left()..end {
buf.get_mut(x, y).set_symbol(" ");
}
if y == center {
let precent_label = format!("{}%", self.percent);
let label = self.label.unwrap_or(&precent_label);
let label_width = label.width() as u16;
let middle = (gauge_area.width - label_width) / 2 + gauge_area.left();
buf.set_string(middle, y, label, self.style);
}
for x in gauge_area.left()..end {
buf.get_mut(x, y)
.set_fg(self.style.bg)
.set_bg(self.style.fg);
}
}
}
}