_topmost

Source/Engine/Platform/SDL/SDLPlatform.cpp

@@ -217,9 +217,15 @@ void SDLPlatform::Tick()
             if (draggedWindow == nullptr)
                 return true;
 
+            // When the window is being dragged on Windows, the internal message loop is blocking
+            // the SDL event queue. We need to handle all relevant events in this event watch callback
+            // to ensure dragging related functionality doesn't break due to engine not getting updated.
+            // This also happens to fix the engine freezing during the dragging operation.
+
             SDLWindow* window = SDLWindow::GetWindowFromEvent(*event);
             if (event->type == SDL_EVENT_WINDOW_EXPOSED)
             {
+                // The internal timer is sending exposed events every ~16ms
                 Engine::OnUpdate();//Scripting::Update(); // For docking updates
                 Engine::OnDraw();
                 return false;

Source/Engine/Platform/SDL/SDLWindow.cpp

@@ -67,6 +67,11 @@ void GetRelativeWindowOffset(WindowType type, SDLWindow* parentWindow, Int2& pos
 Int2 GetSDLWindowScreenPosition(const SDLWindow* window);
 void SetSDLWindowScreenPosition(const SDLWindow* window, const int x, const int y);
 
+bool IsPopupWindow(WindowType type)
+{
+    return type == WindowType::Popup || type == WindowType::Tooltip;
+}
+
 class SDLDropFilesData : public IGuiData
 {
 public:
@@ -824,7 +829,7 @@ void SDLWindow::Show()
         BringToFront();
     
     // Reused top-most windows doesn't stay on top for some reason
-    if (_settings.IsTopmost && _settings.Type != WindowType::Tooltip)
+    if (_settings.IsTopmost && !IsPopupWindow(_settings.Type))
         SetIsAlwaysOnTop(true);
 
     if (_isTrackingMouse)
@@ -980,11 +985,6 @@ void SDLWindow::SetClientBounds(const Rectangle& clientArea)
     SDL_SetWindowSize(_window, newW, newH);
 }
 
-bool IsPopupWindow(WindowType type)
-{
-    return type == WindowType::Popup || type == WindowType::Tooltip;
-}
-
 void GetRelativeWindowOffset(WindowType type, SDLWindow* parentWindow, Int2& positionOffset)
 {
     if (!IsPopupWindow(type))