Client now automatically selects a layer when connected

src/DrawingProgram/Layers/DrawingProgramLayerFolder.cpp

@@ -33,3 +33,19 @@ void DrawingProgramLayerFolder::get_flattened_component_list(std::vector<CanvasC
     for(auto& listItem : (*folderList) | std::views::reverse)
         listItem.obj->get_flattened_component_list(objList);
 }
+
+NetworkingObjects::NetObjWeakPtr<DrawingProgramLayerListItem> DrawingProgramLayerFolder::get_initial_editing_layer() const {
+    // BFS, select a layer that's closest to root as possible
+    for(auto& c : *folderList) {
+        if(!c.obj->is_folder())
+            return c.obj;
+    }
+    for(auto& c : *folderList) {
+        if(c.obj->is_folder()) {
+            NetworkingObjects::NetObjWeakPtr<DrawingProgramLayerListItem> toRet = c.obj->get_folder().get_initial_editing_layer();
+            if(!toRet.expired())
+                return toRet;
+        }
+    }
+    return {};
+}

src/DrawingProgram/Layers/DrawingProgramLayerFolder.hpp

@@ -14,6 +14,7 @@ class DrawingProgramLayerFolder {
         void commit_update_dont_invalidate_cache(DrawingProgramLayerManager& layerMan) const;
         void get_flattened_component_list(std::vector<CanvasComponentContainer::ObjInfo*>& objList) const;
         void set_to_erase();
+        NetworkingObjects::NetObjWeakPtr<DrawingProgramLayerListItem> get_initial_editing_layer() const;
 
         NetworkingObjects::NetObjOwnerPtr<NetworkingObjects::NetObjOrderedList<DrawingProgramLayerListItem>> folderList;
         bool isFolderOpen = false;

src/DrawingProgram/Layers/DrawingProgramLayerManager.cpp

@@ -23,6 +23,7 @@ void DrawingProgramLayerManager::read_components_client(cereal::PortableBinaryIn
     layerTreeRoot = drawP.world.netObjMan.read_create_message<DrawingProgramLayerListItem>(a, nullptr);
     layerTreeRoot->commit_update_dont_invalidate_cache(*this);
     layerTreeRoot->set_component_list_callbacks(*this);
+    editingLayer = layerTreeRoot->get_folder().get_initial_editing_layer();
 }
 
 bool DrawingProgramLayerManager::is_a_layer_being_edited() {

src/DrawingProgram/Layers/DrawingProgramLayerManager.hpp

@@ -12,6 +12,7 @@ class DrawingProgramLayerManager {
         friend class DrawingProgramLayerFolder;
         NetworkingObjects::NetObjOwnerPtr<DrawingProgramLayerListItem> layerTreeRoot;
         NetworkingObjects::NetObjWeakPtr<DrawingProgramLayerListItem> editingLayer;
+        void set_initial_editing_layer();
     public:
         enum class LayerSelector {
             ALL_VISIBLE_LAYERS,