Added basic percentage display

main/displays/batterygraphdisplay.cpp

@@ -2,8 +2,10 @@
 
 // 3rdparty lib includes
 #include <screenmanager.h>
+#include <tftinstance.h>
 
 // local includes
+#include "battery.h"
 #include "globals.h"
 #include "displays/menus/batterymenu.h"
 
@@ -26,6 +28,22 @@ void BatteryGraphDisplay::redraw()
     using namespace espgui;
     Base::redraw();
 
+    if (const auto avgVoltage = controllers.getAvgVoltage(); avgVoltage)
+    {
+        if (*avgVoltage == m_lastBatVoltage)
+            return;
+        const auto cellType = configs.battery.cellType.value;
+
+        uint16_t onePercent = tft.width() / 100;
+        uint16_t xOffset = onePercent * getBatteryPercentage(*avgVoltage, cellType);
+        uint16_t lastXOffset = onePercent * getBatteryPercentage(m_lastBatVoltage, cellType);
+
+        // clear the old one and draw the new one
+        tft.fillRect(lastXOffset, 40, onePercent, tft.height() - 40, TFT_BLACK);
+        tft.fillRect(xOffset, 40, onePercent, tft.height() - 40, TFT_WHITE);
+        m_lastBatVoltage = *avgVoltage;
+    }
+
     // tft.drawLine() code
 }
 

main/displays/batterygraphdisplay.h

@@ -12,4 +12,7 @@ public:
     void redraw() override;
 
     void buttonPressed(espgui::Button button) override;
+
+private:
+    float m_lastBatVoltage{0};
 };