Implement clear view plot.

src/plot.rs

@@ -1,3 +1,4 @@
+use core::f64;
 use std::collections::VecDeque;
 
 use egui_plot::{PlotPoint, PlotPoints};
@@ -9,10 +10,10 @@ pub struct TimeSeriesPlot {
 
 impl TimeSeriesPlot {
     pub fn new() -> Self {
-        let max_points = 100;
+        let max_points = 500;
         Self {
-            values: (0..max_points as i32)
-                .map(|i| PlotPoint::new(i, 0.0))
+            values: (-(max_points as i32)..0)
+                .map(|i| PlotPoint::new(i, f64::NAN))
                 .collect(), // Create x amount of (0,0) points
             max_points,
         }
@@ -21,7 +22,7 @@ impl TimeSeriesPlot {
     pub fn add(&mut self, val: f64) {
         let last_x = self.values.back().unwrap().x;
 
-        if last_x >= self.max_points as f64 {
+        if last_x >= 0.0 {
             self.values.pop_front();
         }
 
@@ -39,4 +40,10 @@ impl TimeSeriesPlot {
         }
         PlotPoints::Owned(Vec::from_iter(values))
     }
+
+    pub fn clear(&mut self) {
+        self.values = (-(self.max_points as i32)..0)
+            .map(|i| PlotPoint::new(i, f64::NAN))
+            .collect();
+    }
 }