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fix for canvas rendering edge cases causing overflow errors

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This commit is contained in:
Jeremy Day 2019-06-19 22:30:36 -07:00 committed by Florian Dehau
parent 2a7eec816a
commit 47c68e40a2
2 changed files with 38 additions and 1 deletions
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2
src/widgets/canvas/mod.rs
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@ -99,7 +99,7 @@ impl<'a> Context<'a> {
let top = self.y_bounds[1];
for (x, y) in shape
.points()
.filter(|&(x, y)| !(x < left || x > right || y < bottom || y > top))
.filter(|&(x, y)| !(x <= left || x >= right || y <= bottom || y >= top))
{
let dy = ((top - y) * f64::from(self.height - 1) * 4.0 / (top - bottom)) as usize;
let dx = ((x - left) * f64::from(self.width - 1) * 2.0 / (right - left)) as usize;

37
tests/chart.rs Normal file
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@ -0,0 +1,37 @@
use tui::backend::TestBackend;
use tui::layout::Rect;
use tui::style::{Color, Style};
use tui::widgets::{Axis, Block, Borders, Chart, Dataset, Marker, Widget};
use tui::Terminal;
#[test]
fn zero_axes_ok() {
let backend = TestBackend::new(100, 100);
let mut terminal = Terminal::new(backend).unwrap();
terminal
.draw(|mut f| {
Chart::default()
.block(Block::default().title("Plot").borders(Borders::ALL))
.x_axis(
Axis::default()
.bounds([ 0.0, 0.0, ])
.labels(&["0.0", "1.0"])
)
.y_axis(
Axis::default()
.bounds([ 0.0, 1.0, ])
.labels(&["0.0", "1.0"])
)
.datasets(&[Dataset::default()
.marker(Marker::Braille)
.style(Style::default().fg(Color::Magenta))
.data(&[(0.0, 0.0)])])
.render(&mut f, Rect {
x: 0,
y: 0,
width: 100,
height: 100,
});
}).unwrap();
}