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fix(widgets/canvas): avoid panic on zero-width bounds

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This commit is contained in:
Florian Dehau 2020-07-05 12:12:59 +02:00
parent 6204eddade
commit fdbea9e2ee
2 changed files with 4 additions and 1 deletions
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3
src/widgets/canvas/mod.rs
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@ -206,6 +206,9 @@ impl<'a, 'b> Painter<'a, 'b> {
} }
let width = (self.context.x_bounds[1] - self.context.x_bounds[0]).abs(); let width = (self.context.x_bounds[1] - self.context.x_bounds[0]).abs();
let height = (self.context.y_bounds[1] - self.context.y_bounds[0]).abs(); let height = (self.context.y_bounds[1] - self.context.y_bounds[0]).abs();
if width == 0.0 || height == 0.0 {
return None;
}
let x = ((x - left) * self.resolution.0 / width) as usize; let x = ((x - left) * self.resolution.0 / width) as usize;
let y = ((top - y) * self.resolution.1 / height) as usize; let y = ((top - y) * self.resolution.1 / height) as usize;
Some((x, y)) Some((x, y))

2
tests/widgets_chart.rs
View File

@ -21,7 +21,7 @@ fn widgets_chart_can_have_axis_with_zero_length_bounds() {
let chart = Chart::default() let chart = Chart::default()
.block(Block::default().title("Plot").borders(Borders::ALL)) .block(Block::default().title("Plot").borders(Borders::ALL))
.x_axis(Axis::default().bounds([0.0, 0.0]).labels(&["0.0", "1.0"])) .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"])) .y_axis(Axis::default().bounds([0.0, 0.0]).labels(&["0.0", "1.0"]))
.datasets(&datasets); .datasets(&datasets);
f.render_widget( f.render_widget(
chart, chart,