1 files changed, 86 insertions, 0 deletions
diff --git a/src/displayapp/screens/StopWatch.h b/src/displayapp/screens/StopWatch.h
new file mode 100644
index 00000000..f9dd5c76
--- /dev/null
+++ b/src/displayapp/screens/StopWatch.h
@@ -0,0 +1,86 @@
+#pragma once
+
+#include "Screen.h"
+#include "components/datetime/DateTimeController.h"
+#include "../LittleVgl.h"
+
+#include "FreeRTOS.h"
+#include "portmacro_cmsis.h"
+
+#include <array>
+
+namespace Pinetime::Applications::Screens {
+
+  enum class States { Init, Running, Halted };
+
+  enum class Events { Play, Pause, Stop };
+
+  struct TimeSeparated_t {
+    int mins;
+    int secs;
+    int msecs;
+  };
+
+  // A simple buffer to hold the latest two laps
+  template <int N> struct LapTextBuffer_t {
+    LapTextBuffer_t() : buffer {}, currentSize {}, capacity {N}, head {-1} {
+    }
+
+    void addLaps(const TimeSeparated_t& timeVal) {
+      head++;
+      head %= capacity;
+      buffer[head] = timeVal;
+
+      if (currentSize < capacity) {
+        currentSize++;
+      }
+    }
+
+    void clearBuffer() {
+      buffer = {};
+      currentSize = 0;
+      head = -1;
+    }
+
+    TimeSeparated_t* operator[](std::size_t idx) {
+      // Sanity check for out-of-bounds
+      if (idx >= 0 && idx < capacity) {
+        if (idx < currentSize) {
+          // This transformation is to ensure that head is always pointing to index 0.
+          const auto transformed_idx = (head - idx) % capacity;
+          return (&buffer[transformed_idx]);
+        }
+      }
+      return nullptr;
+    }
+
+  private:
+    std::array<TimeSeparated_t, N> buffer;
+    uint8_t currentSize;
+    uint8_t capacity;
+    int8_t head;
+  };
+
+  class StopWatch : public Screen {
+  public:
+    StopWatch(DisplayApp* app);
+    ~StopWatch() override;
+    bool Refresh() override;
+    bool OnButtonPushed() override;
+    void playPauseBtnEventHandler(lv_event_t event);
+    void stopLapBtnEventHandler(lv_event_t event);
+
+  private:
+    bool running;
+    States currentState;
+    Events currentEvent;
+    TickType_t startTime;
+    TickType_t oldTimeElapsed;
+    TimeSeparated_t currentTimeSeparated; // Holds Mins, Secs, millisecs
+    LapTextBuffer_t<2> lapBuffer;
+    int lapNr;
+    bool lapPressed;
+    lv_obj_t *time, *msecTime, *btnPlayPause, *btnStopLap, *txtPlayPause, *txtStopLap;
+    lv_obj_t *lapOneText, *lapTwoText;
+  };
+}