Restore FindMyPhone UI after task sent.

Author: vchigrin

src/components/ble/ImmediateAlertClient.cpp

@@ -98,16 +98,16 @@ void ImmediateAlertClient::Discover(uint16_t connectionHandle, std::function<voi
   ble_gattc_disc_svc_by_uuid(connectionHandle, &immediateAlertClientUuid.u, OnDiscoveryEventCallback, this);
 }
 
-void ImmediateAlertClient::sendImmediateAlert(ImmediateAlertClient::Levels level) {
+bool ImmediateAlertClient::sendImmediateAlert(ImmediateAlertClient::Levels level) {
 
   auto* om = ble_hs_mbuf_from_flat(&level, 1);
 
   uint16_t connectionHandle = systemTask.nimble().connHandle();
 
   if (connectionHandle == 0 || connectionHandle == BLE_HS_CONN_HANDLE_NONE) {
-    return;
+    return false;
   }
 
   ble_gattc_write_no_rsp(connectionHandle, alertLevelHandle, om);
-
+  return true;
 }

src/components/ble/ImmediateAlertClient.h

@@ -25,7 +25,7 @@ namespace Pinetime {
       bool OnDiscoveryEvent(uint16_t connectionHandle, const ble_gatt_error* error, const ble_gatt_svc* service);
       int OnCharacteristicDiscoveryEvent(uint16_t conn_handle, const ble_gatt_error* error, const ble_gatt_chr* characteristic);
 
-      void sendImmediateAlert(Levels level);
+      bool sendImmediateAlert(Levels level);
 
       static constexpr const ble_uuid16_t* Uuid() {
         return &ImmediateAlertClient::immediateAlertClientUuid;

src/displayapp/screens/FindMyPhone.cpp

@@ -7,10 +7,21 @@
 using namespace Pinetime::Applications::Screens;
 
 namespace {
+  static constexpr char defaultLabelText[] = "Find my phone";
+  static constexpr char alertSentLabelText[] = "Alert sent";
+  static constexpr char noConnectionLabelText[] = "No connection";
+  static constexpr auto restoreLabelTimeoutTicks = pdMS_TO_TICKS(2 * 1000);
+
   void btnImmediateAlertEventHandler(lv_obj_t* obj, lv_event_t event) {
     auto* screen = static_cast<FindMyPhone*>(obj->user_data);
     screen->OnImmediateAlertEvent(obj, event);
   }
+
+  void RestoreLabelTaskCallback(lv_task_t* task) {
+    auto* screen = static_cast<FindMyPhone*>(task->user_data);
+    screen->RestoreLabelText();
+    screen->StopRestoreLabelTask();
+  }
 }
 
 FindMyPhone::FindMyPhone(Pinetime::Controllers::ImmediateAlertClient& immediateAlertClient) : immediateAlertClient {immediateAlertClient} {
@@ -26,7 +37,8 @@ FindMyPhone::FindMyPhone(Pinetime::Controllers::ImmediateAlertClient& immediateA
 
   label_title = lv_label_create(lv_scr_act(), nullptr);
 
-  lv_label_set_text_static(label_title, "Find my phone");
+  lv_label_set_text_static(label_title, defaultLabelText);
+  lv_obj_set_style_local_text_color(label_title, LV_LABEL_PART_MAIN, LV_STATE_DEFAULT, Colors::lightGray);
   lv_obj_align(label_title, nullptr, LV_ALIGN_CENTER, 0, -40);
 
   bt_none = lv_btn_create(container, nullptr);
@@ -55,8 +67,6 @@ FindMyPhone::FindMyPhone(Pinetime::Controllers::ImmediateAlertClient& immediateA
   label_high = lv_label_create(bt_high, nullptr);
   lv_label_set_text_static(label_high, "High");
   lv_obj_set_style_local_bg_color(bt_high, LV_LABEL_PART_MAIN, LV_STATE_DEFAULT, LV_COLOR_RED);
-
-  UpdateImmediateAlerts();
 }
 
 FindMyPhone::~FindMyPhone() {
@@ -88,7 +98,29 @@ void FindMyPhone::UpdateImmediateAlerts() {
       lv_obj_set_style_local_text_color(label_title, LV_LABEL_PART_MAIN, LV_STATE_DEFAULT, LV_COLOR_RED);
       break;
   }
-  immediateAlertClient.sendImmediateAlert(last_level);
+  if (immediateAlertClient.sendImmediateAlert(last_level)) {
+    lv_label_set_text_static(label_title, alertSentLabelText);
+  } else {
+    lv_label_set_text_static(label_title, noConnectionLabelText);
+  }
+  ScheduleRestoreLabelTask();
+}
 
+void FindMyPhone::ScheduleRestoreLabelTask() {
+  if (taskRestoreLabelText) {
+    return;
+  }
+  taskRestoreLabelText = lv_task_create(RestoreLabelTaskCallback, restoreLabelTimeoutTicks, LV_TASK_PRIO_MID, this);
 }
 
+void FindMyPhone::StopRestoreLabelTask() {
+  if (taskRestoreLabelText) {
+    lv_task_del(taskRestoreLabelText);
+    taskRestoreLabelText = nullptr;
+  }
+}
+
+void FindMyPhone::RestoreLabelText() {
+  lv_label_set_text_static(label_title, defaultLabelText);
+  lv_obj_set_style_local_text_color(label_title, LV_LABEL_PART_MAIN, LV_STATE_DEFAULT, Colors::lightGray);
+}

src/displayapp/screens/FindMyPhone.h

@@ -26,6 +26,10 @@ namespace Pinetime {
 
         void OnImmediateAlertEvent(lv_obj_t* obj, lv_event_t event);
 
+        void ScheduleRestoreLabelTask();
+        void StopRestoreLabelTask();
+        void RestoreLabelText();
+
       private:
         Pinetime::Controllers::ImmediateAlertClient& immediateAlertClient;
 
@@ -39,7 +43,7 @@ namespace Pinetime {
         lv_obj_t* label_none;
         lv_obj_t* label_high;
         lv_obj_t* label_mild;
-
+        lv_task_t* taskRestoreLabelText = nullptr;
 
         Pinetime::Controllers::ImmediateAlertClient::Levels last_level;
       };