PR InfiniTimeOrg#681: Motion: keep screen awake while showing motion app

Squashed commit of the following:

commit 4022680
Author: Reinhold Gschweicher <pyro4hell@gmail.com>
Date:   Mon Sep 20 21:33:21 2021 +0200

    Motion: keep screen awake while showing motion app

    Instead of having to manually periodically tap on the phone to keep the
    screen awake, just prevent the screen to go to sleep while showing the
    motion sensor graph.

src/displayapp/DisplayApp.cpp

@@ -460,7 +460,7 @@ void DisplayApp::LoadApp(Apps app, DisplayApp::FullRefreshDirections direction)
       ReturnApp(Apps::Launcher, FullRefreshDirections::Down, TouchEvents::None);
       break;
     case Apps::Motion:
-      currentScreen = std::make_unique<Screens::Motion>(this, motionController);
+      currentScreen = std::make_unique<Screens::Motion>(this, motionController, *systemTask);
       break;
     case Apps::Steps:
       currentScreen = std::make_unique<Screens::Steps>(this, motionController, settingsController);

src/displayapp/screens/Motion.cpp

@@ -4,8 +4,8 @@
 
 using namespace Pinetime::Applications::Screens;
 
-Motion::Motion(Pinetime::Applications::DisplayApp* app, Controllers::MotionController& motionController)
-  : Screen(app), motionController {motionController} {
+Motion::Motion(Pinetime::Applications::DisplayApp* app, Controllers::MotionController& motionController, System::SystemTask& systemTask)
+  : Screen(app), motionController {motionController}, systemTask {systemTask} {
   chart = lv_chart_create(lv_scr_act(), NULL);
   lv_obj_set_size(chart, 240, 240);
   lv_obj_align(chart, NULL, LV_ALIGN_IN_TOP_MID, 0, 0);
@@ -37,12 +37,15 @@ Motion::Motion(Pinetime::Applications::DisplayApp* app, Controllers::MotionContr
   lv_obj_align(labelStep, chart, LV_ALIGN_IN_BOTTOM_LEFT, 0, 0);
   lv_label_set_text(labelStep, "Steps ---");
 
+  systemTask.PushMessage(System::Messages::DisableSleeping);
+
   taskRefresh = lv_task_create(RefreshTaskCallback, LV_DISP_DEF_REFR_PERIOD, LV_TASK_PRIO_MID, this);
 }
 
 Motion::~Motion() {
   lv_task_del(taskRefresh);
   lv_obj_clean(lv_scr_act());
+  systemTask.PushMessage(System::Messages::EnableSleeping);
 }
 
 void Motion::Refresh() {

src/displayapp/screens/Motion.h

@@ -7,20 +7,22 @@
 #include <lvgl/src/lv_core/lv_style.h>
 #include <lvgl/src/lv_core/lv_obj.h>
 #include <components/motion/MotionController.h>
+#include "systemtask/SystemTask.h"
 
 namespace Pinetime {
   namespace Applications {
     namespace Screens {
 
       class Motion : public Screen {
       public:
-        Motion(DisplayApp* app, Controllers::MotionController& motionController);
+        Motion(DisplayApp* app, Controllers::MotionController& motionController, System::SystemTask& systemTask);
         ~Motion() override;
 
         void Refresh() override;
 
       private:
         Controllers::MotionController& motionController;
+        System::SystemTask& systemTask;
         lv_obj_t* chart;
         lv_chart_series_t* ser1;
         lv_chart_series_t* ser2;