some more refactoring for stopwatch

timemanager/Stopwatch.h

@@ -8,6 +8,11 @@
 #define FRAMEWORK_TIMEMANAGER_STOPWATCH_H_
 #include <framework/timemanager/Clock.h>
 
+enum class StopwatchDisplayMode {
+    MS_DOUBLE,
+    MS
+};
+
 /**
  * @brief Simple Stopwatch implementation to measure elapsed time
  * @details
@@ -15,24 +20,38 @@
  * times automatically on destruction if not explicitely deactivated in the
  * constructor. The default time format is the elapsed time in miliseconds
  * as a float.
- * This class caches the value
  */
 class Stopwatch {
-    enum class DisplayMode {
-        MS_DOUBLE,
-        MS
-    };
 
-    Stopwatch(bool displayOnDestruction = true, DisplayMode displayMode =
-            DisplayMode::MS_DOUBLE);
+    Stopwatch(bool displayOnDestruction = true,
+            StopwatchDisplayMode displayMode = StopwatchDisplayMode::MS_DOUBLE);
     virtual~ Stopwatch();
 
+    /**
+     * Caches the start time
+     */
     void start();
 
+    /**
+     * Calculates the elapsed time since start and returns it
+     * @return elapsed time in milliseconds (rounded)
+     */
     ms_normal_t stop();
+
+    /**
+     * Calculates the elapsed time since start and returns it
+     * @return elapsed time in milliseconds (doulbe precision)
+     */
     ms_double_t stopPrecise();
 
+    /**
+     * Displays the elapsed times on the osstream, depending on internal display
+     * mode.
+     */
     void display();
+
+    StopwatchDisplayMode getDisplayMode() const;
+    void setDisplayMode(StopwatchDisplayMode displayMode);
 private:
 
     timeval startTime {0, 0};
@@ -40,7 +59,7 @@ private:
     double elapsedTimeMsDouble = 0;
 
     bool displayOnDestruction = true;
-    DisplayMode displayMode = DisplayMode::MS_DOUBLE;
+    StopwatchDisplayMode displayMode = StopwatchDisplayMode::MS_DOUBLE;
 
     void stopInternal();
 };