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lib/charts/BarChart.cpp

@@ -18,6 +18,16 @@ void BarChart::reset(uint16_t x, uint16_t y, uint16_t w, uint16_t h)
     Chart::reset(x, y, w, h);
 }
 
+void BarChart::clear()
+{
+    for (int i = 0; i < width; i++)
+    {
+        ys[i] = min_y;
+    }
+
+    redraw_all = true;
+}
+
 int BarChart::updatePoint(float x, float y)
 {
     if (x < min_x || x >= max_x)

lib/charts/charts.h

@@ -81,6 +81,7 @@ struct BarChart : ProgressChart, Listener
     };
 
     void reset(uint16_t x, uint16_t y, uint16_t w, uint16_t h) override;
+    void clear();
     int updatePoint(float x, float y) override;
     void drawOne(int x) override;
     void draw() override;