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Add support for multi line sparkline

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This commit is contained in:
Florian Dehau 2016-10-13 17:30:35 +02:00
parent 86ae92b489
commit ea1397319c
1 changed files with 36 additions and 24 deletions
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60
src/widgets/sparkline.rs
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@ -11,6 +11,7 @@ pub struct Sparkline<'a> {
block: Option<Block<'a>>,
color: Color,
data: Vec<u64>,
max: Option<u64>,
}
impl<'a> Sparkline<'a> {
@ -19,6 +20,7 @@ impl<'a> Sparkline<'a> {
block: None,
color: Color::White,
data: Vec::new(),
max: None,
}
}
@ -36,6 +38,11 @@ impl<'a> Sparkline<'a> {
self.data = data.to_vec();
self
}
pub fn max(&mut self, max: u64) -> &mut Sparkline<'a> {
self.max = Some(max);
self
}
}
impl<'a> Widget for Sparkline<'a> {
@ -49,31 +56,36 @@ impl<'a> Widget for Sparkline<'a> {
} else {
let margin_x = spark_area.x - area.x;
let margin_y = spark_area.y - area.y;
match self.data.iter().max() {
Some(max_value) => {
let max_index = min(spark_area.width as usize, self.data.len());
let line = self.data
.iter()
.take(max_index)
.filter_map(|e| {
let value = e * 8 / max_value;
match value {
0 => Some(' '),
1 => Some(bar::ONE_EIGHTH),
2 => Some(bar::ONE_QUATER),
3 => Some(bar::THREE_EIGHTHS),
4 => Some(bar::HALF),
5 => Some(bar::FIVE_EIGHTHS),
6 => Some(bar::THREE_EIGHTHS),
7 => Some(bar::THREE_QUATERS),
8 => Some(bar::FULL),
_ => None,
}
})
.collect::<String>();
buf.set_string(margin_x, margin_y, &line);
let max = match self.max {
Some(v) => v,
None => *self.data.iter().max().unwrap_or(&1u64),
};
let max_index = min(spark_area.width as usize, self.data.len());
let mut data = self.data
.iter()
.map(|e| e * spark_area.height as u64 * 8 / max)
.collect::<Vec<u64>>();
for j in (0..spark_area.height).rev() {
let mut line = String::with_capacity(max_index);
for i in 0..max_index {
line.push(match data[i] {
0 => ' ',
1 => bar::ONE_EIGHTH,
2 => bar::ONE_QUATER,
3 => bar::THREE_EIGHTHS,
4 => bar::HALF,
5 => bar::FIVE_EIGHTHS,
6 => bar::THREE_EIGHTHS,
7 => bar::THREE_QUATERS,
_ => bar::FULL,
});
if data[i] > 8 {
data[i] -= 8;
} else {
data[i] = 0;
}
}
None => {}
buf.set_string(margin_x, margin_y + j, &line);
}
}
buf