Update the map widget when requested by a layer

scwx-qt/source/scwx/qt/map/generic_layer.hpp

@@ -45,6 +45,9 @@ public:
                    const QPointF&   mouseGlobalPos,
                    const glm::vec2& mouseCoords);
 
+signals:
+   void NeedsRendering();
+
 protected:
    std::shared_ptr<MapContext> context() const;
 

scwx-qt/source/scwx/qt/map/map_widget.cpp

@@ -969,6 +969,11 @@ void MapWidgetImpl::AddLayer(const std::string&            id,
 
       layerList_.push_back(id);
       genericLayers_.push_back(layer);
+
+      connect(layer.get(),
+              &GenericLayer::NeedsRendering,
+              widget_,
+              [this]() { widget_->update(); });
    }
    catch (const std::exception&)
    {