inactivity: Use LVGL inactivity timers

Replace custom FreeRTOS inactivity timers with LVGL inactivity timers.

DisplayApp: Trigger display activity on timer done.

inactivity: Add additional checks
The backlight could be turned on by RestoreBrightness() on ble connect
event.

inactivity: Trigger activity on screen switch

A notification timing out could put the watch to sleep immediately.
While this could be ideal behaviour, it was caused by delay in
processing the EnableSleeping event and pushing RestoreBrightness to
DisplayApp.

src/displayapp/DisplayApp.cpp

@@ -155,6 +155,29 @@ void DisplayApp::Refresh() {
     LoadScreen(returnAppStack.Pop(), returnDirection);
   };
 
+  auto DimScreen = [this]() {
+    if (brightnessController.Level() != Controllers::BrightnessController::Levels::Off) {
+      isDimmed = true;
+      brightnessController.Set(Controllers::BrightnessController::Levels::Low);
+    }
+  };
+
+  auto RestoreBrightness = [this]() {
+    if (brightnessController.Level() != Controllers::BrightnessController::Levels::Off) {
+      isDimmed = false;
+      lv_disp_trig_activity(nullptr);
+      ApplyBrightness();
+    }
+  };
+
+  auto IsPastDimTime = [this]() -> bool {
+    return lv_disp_get_inactive_time(nullptr) >= pdMS_TO_TICKS(settingsController.GetScreenTimeOut() - 2000);
+  };
+
+  auto IsPastSleepTime = [this]() -> bool {
+    return lv_disp_get_inactive_time(nullptr) >= pdMS_TO_TICKS(settingsController.GetScreenTimeOut());
+  };
+
   TickType_t queueTimeout;
   switch (state) {
     case States::Idle:
@@ -165,6 +188,18 @@ void DisplayApp::Refresh() {
         LoadPreviousScreen();
       }
       queueTimeout = lv_task_handler();
+
+      if (!systemTask->IsSleepDisabled() && IsPastDimTime()) {
+        if (!isDimmed) {
+          DimScreen();
+        }
+        if (IsPastSleepTime()) {
+          systemTask->PushMessage(System::Messages::GoToSleep);
+          state = States::Idle;
+        }
+      } else if (isDimmed) {
+        RestoreBrightness();
+      }
       break;
     default:
       queueTimeout = portMAX_DELAY;
@@ -175,10 +210,10 @@ void DisplayApp::Refresh() {
   if (xQueueReceive(msgQueue, &msg, queueTimeout) == pdTRUE) {
     switch (msg) {
       case Messages::DimScreen:
-        brightnessController.Set(Controllers::BrightnessController::Levels::Low);
+        DimScreen();
         break;
       case Messages::RestoreBrightness:
-        ApplyBrightness();
+        RestoreBrightness();
         break;
       case Messages::GoToSleep:
         while (brightnessController.Level() != Controllers::BrightnessController::Levels::Off) {
@@ -191,12 +226,10 @@ void DisplayApp::Refresh() {
         break;
       case Messages::GoToRunning:
         lcd.Wakeup();
+        lv_disp_trig_activity(nullptr);
         ApplyBrightness();
         state = States::Running;
         break;
-      case Messages::UpdateTimeOut:
-        PushMessageToSystemTask(System::Messages::UpdateTimeOut);
-        break;
       case Messages::UpdateBleConnection:
         //        clockScreen.SetBleConnectionState(bleController.IsConnected() ? Screens::Clock::BleConnectionStates::Connected :
         //        Screens::Clock::BleConnectionStates::NotConnected);
@@ -206,6 +239,7 @@ void DisplayApp::Refresh() {
         break;
       case Messages::TimerDone:
         if (currentApp == Apps::Timer) {
+          lv_disp_trig_activity(nullptr);
           auto* timer = static_cast<Screens::Timer*>(currentScreen.get());
           timer->Reset();
         } else {
@@ -319,6 +353,7 @@ void DisplayApp::Refresh() {
         motorController.RunForDuration(35);
         break;
       case Messages::OnChargingEvent:
+        RestoreBrightness();
         motorController.RunForDuration(15);
         break;
     }
@@ -352,7 +387,7 @@ void DisplayApp::LoadNewScreen(Apps app, DisplayApp::FullRefreshDirections direc
 
 void DisplayApp::LoadScreen(Apps app, DisplayApp::FullRefreshDirections direction) {
   lvgl.CancelTap();
-  ApplyBrightness();
+  lv_disp_trig_activity(nullptr);
   motorController.StopRinging();
 
   currentScreen.reset(nullptr);

src/displayapp/DisplayApp.h

@@ -128,6 +128,8 @@ namespace Pinetime {
       static constexpr size_t returnAppStackSize = 10;
       StaticStack<Apps, returnAppStackSize> returnAppStack;
       StaticStack<FullRefreshDirections, returnAppStackSize> appStackDirections;
+
+      bool isDimmed = false;
     };
   }
 }

src/displayapp/Messages.h

@@ -17,7 +17,6 @@ namespace Pinetime {
         NewNotification,
         TimerDone,
         BleFirmwareUpdateStarted,
-        UpdateTimeOut,
         DimScreen,
         RestoreBrightness,
         ShowPairingKey,

src/displayapp/screens/settings/SettingDisplay.cpp

@@ -69,7 +69,6 @@ void SettingDisplay::UpdateSelected(lv_obj_t* object, lv_event_t event) {
       if (object == cbOption[i]) {
         lv_checkbox_set_checked(cbOption[i], true);
         settingsController.SetScreenTimeOut(options[i]);
-        app->PushMessage(Applications::Display::Messages::UpdateTimeOut);
       } else {
         lv_checkbox_set_checked(cbOption[i], false);
       }