Deprecate public `LEDControl.syncDelay` variable

It is now replaced with `LEDControl.setSyncInterval()` to set the LED refresh
rate.

Signed-off-by: Michael Richters <gedankenexperimenter@gmail.com>

src/kaleidoscope/plugin/LEDControl.cpp

@@ -30,12 +30,16 @@ static constexpr uint8_t uninitialized_mode_id = 255;
 uint8_t LEDControl::mode_id = uninitialized_mode_id;
 uint8_t LEDControl::num_led_modes_ = LEDModeManager::numLEDModes();
 LEDMode *LEDControl::cur_led_mode_ = nullptr;
-uint8_t LEDControl::syncDelay = 32;
-uint16_t LEDControl::syncTimer = 0;
 bool LEDControl::enabled_ = true;
 
 LEDControl::LEDControl(void) {
 }
+uint8_t LEDControl::sync_interval_ = 32;
+uint16_t LEDControl::last_sync_time_ = 0;
+
+#ifndef NDEPRECATED
+uint8_t LEDControl::syncDelay = LEDControl::sync_interval_;
+#endif
 
 void LEDControl::next_mode(void) {
   mode_id++;
@@ -197,9 +201,15 @@ EventHandlerResult LEDControl::afterEachCycle() {
   if (!enabled_)
     return EventHandlerResult::OK;
 
-  if (Runtime.hasTimeExpired(syncTimer, syncDelay)) {
+  if (Runtime.hasTimeExpired(last_sync_time_, sync_interval_)) {
+#ifndef NDEPRECATED
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+    sync_interval_ = syncDelay;
+#pragma GCC diagnostic pop
+#endif
     syncLeds();
-    syncTimer += syncDelay;
+    last_sync_time_ += sync_interval_;
     update();
   }
 

src/kaleidoscope/plugin/LEDControl.h

@@ -19,6 +19,14 @@
 #include "kaleidoscope/Runtime.h"
 #include "kaleidoscope/plugin/LEDMode.h"
 
+#ifndef NDEPRECATED
+
+#define _DEPRECATED_MESSAGE_LEDCONTROL_SYNCDELAY                              __NL__ \
+  "The `LEDControl.syncDelay` variable has been deprecated.\n"                __NL__ \
+  "Please use the `LEDControl.setInterval()` function instead."
+
+#endif
+
 #define LED_TOGGLE   B00000001  // Synthetic, internal
 
 #define Key_LEDEffectNext Key(0, KEY_FLAGS | SYNTHETIC | IS_INTERNAL | LED_TOGGLE)
@@ -92,7 +100,20 @@ class LEDControl : public kaleidoscope::Plugin {
   //
   static void activate(LEDModeInterface *plugin);
 
+#ifndef NDEPRECATED
+  DEPRECATED(LEDCONTROL_SYNCDELAY)
   static uint8_t syncDelay;
+#endif
+
+  static void setSyncInterval(uint8_t interval) {
+    sync_interval_ = interval;
+#ifndef NDEPRECATED
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+    syncDelay = interval;
+#pragma GCC diagnostic pop
+#endif
+  }
 
   EventHandlerResult onSetup();
   EventHandlerResult onKeyEvent(KeyEvent &event);
@@ -112,8 +133,9 @@ class LEDControl : public kaleidoscope::Plugin {
   }
 
  private:
-  static uint16_t syncTimer;
   static uint8_t mode_id;
+  static uint16_t last_sync_time_;
+  static uint8_t sync_interval_;
   static uint8_t num_led_modes_;
   static LEDMode *cur_led_mode_;
   static bool enabled_;