Let lvgl control queueTimeout

src/displayapp/DisplayApp.cpp

@@ -141,19 +141,15 @@ uint32_t count = 0;
 bool toggle = true;
 void DisplayApp::Refresh() {
   TickType_t queueTimeout;
-  TickType_t delta;
   switch (state) {
     case States::Idle:
-      IdleState();
       queueTimeout = portMAX_DELAY;
       break;
     case States::Running:
-      RunningState();
-      delta = xTaskGetTickCount() - lastWakeTime;
-      if (delta > LV_DISP_DEF_REFR_PERIOD) {
-        delta = LV_DISP_DEF_REFR_PERIOD;
+      if (!currentScreen->IsRunning()) {
+        LoadApp(returnToApp, returnDirection);
       }
-      queueTimeout = LV_DISP_DEF_REFR_PERIOD - delta;
+      queueTimeout = lv_task_handler();
       break;
     default:
       queueTimeout = portMAX_DELAY;
@@ -161,9 +157,7 @@ void DisplayApp::Refresh() {
   }
 
   Messages msg;
-  bool messageReceived = xQueueReceive(msgQueue, &msg, queueTimeout);
-  lastWakeTime = xTaskGetTickCount();
-  if (messageReceived) {
+  if (xQueueReceive(msgQueue, &msg, queueTimeout)) {
     switch (msg) {
       case Messages::DimScreen:
         // Backup brightness is the brightness to return to after dimming or sleeping
@@ -275,13 +269,6 @@ void DisplayApp::Refresh() {
   }
 }
 
-void DisplayApp::RunningState() {
-  if (!currentScreen->IsRunning()) {
-    LoadApp(returnToApp, returnDirection);
-  }
-  lv_task_handler();
-}
-
 void DisplayApp::StartApp(Apps app, DisplayApp::FullRefreshDirections direction) {
   nextApp = app;
   nextDirection = direction;
@@ -423,9 +410,6 @@ void DisplayApp::LoadApp(Apps app, DisplayApp::FullRefreshDirections direction)
   currentApp = app;
 }
 
-void DisplayApp::IdleState() {
-}
-
 void DisplayApp::PushMessage(Messages msg) {
   if (in_isr()) {
     BaseType_t xHigherPriorityTaskWoken;

src/displayapp/DisplayApp.h

@@ -103,8 +103,6 @@ namespace Pinetime {
       TouchEvents returnTouchEvent = TouchEvents::None;
 
       TouchEvents GetGesture();
-      void RunningState();
-      void IdleState();
       static void Process(void* instance);
       void InitHw();
       void Refresh();