Use init() instead of constructor.

src/plugins/input/RotaryEncoderInterruptImpl1.h

@@ -1,11 +1,19 @@
 #pragma once
 #include "RotaryEncoderInterruptBase.h"
 
+/**
+ * @brief The idea behind this class to have static methods for the event handlers.
+ *      Check attachInterrupt() at RotaryEncoderInteruptBase.cpp
+ *      Technically you can have as many rotary encoders hardver attached
+ *      to your device as you wish, but you always need to have separate event
+ *      handlers, thus you need to have a RotaryEncoderInterrupt implementation.
+ */
 class RotaryEncoderInterruptImpl1 :
     public RotaryEncoderInterruptBase
 {
   public:
-    RotaryEncoderInterruptImpl1(
+    RotaryEncoderInterruptImpl1();
+    void init(
         uint8_t pinA, uint8_t pinB, uint8_t pinPress,
         char eventCw, char eventCcw, char eventPressed);
     static void handleIntA();