feat: enhance app navigation with swipe direction handling and previous app tracking

Author: Joel Hill

src/displayapp/DisplayApp.cpp

@@ -210,6 +210,12 @@ void DisplayApp::Refresh() {
       case FullRefreshDirections::RightAnim:
         returnDirection = FullRefreshDirections::LeftAnim;
         break;
+      case FullRefreshDirections::Left:
+        returnDirection = FullRefreshDirections::Right;
+        break;
+      case FullRefreshDirections::Right:
+        returnDirection = FullRefreshDirections::Left;
+        break;
       default:
         returnDirection = FullRefreshDirections::None;
         break;
@@ -406,6 +412,10 @@ void DisplayApp::Refresh() {
               return TouchEvents::SwipeRight;
             case DisplayApp::FullRefreshDirections::RightAnim:
               return TouchEvents::SwipeLeft;
+            case DisplayApp::FullRefreshDirections::Left:
+              return TouchEvents::SwipeRight;
+            case DisplayApp::FullRefreshDirections::Right:
+              return TouchEvents::SwipeLeft;
           }
         };
         if (!currentScreen->OnTouchEvent(gesture)) {
@@ -420,6 +430,11 @@ void DisplayApp::Refresh() {
               case TouchEvents::SwipeRight:
                 LoadNewScreen(Apps::QuickSettings, DisplayApp::FullRefreshDirections::RightAnim);
                 break;
+              case TouchEvents::SwipeLeft:
+                if (previousApp != Apps::None) {
+                  LoadNewScreen(previousApp, DisplayApp::FullRefreshDirections::LeftAnim);
+                }
+                break;
               case TouchEvents::DoubleTap:
                 PushMessageToSystemTask(System::Messages::GoToSleep);
                 break;
@@ -428,6 +443,10 @@ void DisplayApp::Refresh() {
             }
           } else if (gesture == LoadDirToReturnSwipe(appStackDirections.Top())) {
             LoadPreviousScreen();
+          } else if (gesture == TouchEvents::SwipeRight) {
+            LoadNewScreen(Apps::Clock, DisplayApp::FullRefreshDirections::RightAnim);
+            appStackDirections.Reset();
+            returnAppStack.Reset();
           }
         } else {
           lvgl.CancelTap();
@@ -448,6 +467,8 @@ void DisplayApp::Refresh() {
             LoadNewScreen(Apps::Clock, DisplayApp::FullRefreshDirections::Up);
           } else if (currentApp == Apps::QuickSettings) {
             LoadNewScreen(Apps::Clock, DisplayApp::FullRefreshDirections::LeftAnim);
+          } else if (currentApp == previousApp) {
+            LoadNewScreen(Apps::Clock, DisplayApp::FullRefreshDirections::RightAnim);
           } else {
             LoadNewScreen(Apps::Clock, DisplayApp::FullRefreshDirections::Down);
           }
@@ -491,7 +512,10 @@ void DisplayApp::Refresh() {
   }
 }
 
-void DisplayApp::StartApp(Apps app, DisplayApp::FullRefreshDirections direction) {
+void DisplayApp::StartApp(Apps app, DisplayApp::FullRefreshDirections direction, bool setPrevious) {
+  if (setPrevious) {
+    previousApp = app;
+  }
   nextApp = app;
   nextDirection = direction;
 }

src/displayapp/DisplayApp.h

@@ -71,7 +71,7 @@ namespace Pinetime {
       void Start(System::BootErrors error);
       void PushMessage(Display::Messages msg);
 
-      void StartApp(Apps app, DisplayApp::FullRefreshDirections direction);
+      void StartApp(Apps app, DisplayApp::FullRefreshDirections direction, bool setPrevious = false);
 
       void SetFullRefresh(FullRefreshDirections direction);
 
@@ -115,7 +115,9 @@ namespace Pinetime {
       std::unique_ptr<Screens::Screen> currentScreen;
 
       Apps currentApp = Apps::None;
+      Apps previousApp = Apps::None;
       Apps returnToApp = Apps::None;
+      
       FullRefreshDirections returnDirection = FullRefreshDirections::None;
       TouchEvents returnTouchEvent = TouchEvents::None;