Decimal precision independant of tick count

aantn · Feb 18, 2024 · 6b0cf33 · 6b0cf33
1 parent 9d83be0
commit 6b0cf33
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Showing 2 changed files with 3 additions and 3 deletions.
diff --git a/src/datastore.rs b/src/datastore.rs
@@ -130,7 +130,7 @@ impl DataStore {
     }
 
     fn format_tick(&self, increment: f64, value: f64) -> String {
-        let precision: usize = increment.log10().abs().ceil().max(1.0) as usize;
+        let precision: usize = (-increment.log10().floor()).max(0.0) as usize;
         format!("{:.precision$}", value)
     }
 

diff --git a/src/ui.rs b/src/ui.rs
@@ -57,8 +57,8 @@ pub fn draw_ui<T: tui::backend::Backend>(
                 ([min, max], num_ticks)
             };
 
-            let increment = (y_axis_bounds[1] - y_axis_bounds[0]) / (y_axis_num_ticks - 1) as f64;
-            let precision: usize = increment.log10().abs().ceil().max(1.0) as usize + 1;
+            let range_hundredth = (y_axis_bounds[1] - y_axis_bounds[0]) / 100.0;
+            let precision: usize = (-range_hundredth.log10().floor()).max(0.0) as usize;
 
             // Top level layout
             let chunks: Vec<tui::layout::Rect> = Layout::default()