added emplaceNode function to ImFlow, allows inserting a node via not template argument,

added dragdroptarget callback

Author: R3sid3ntD1023

include/ImNodeFlow.h

@@ -310,6 +310,8 @@ namespace ImFlow
         template<typename T, typename... Params>
         std::shared_ptr<T> addNode(const ImVec2& pos, Params&&... args);
 
+        void emplaceNode(const ImVec2& pos, const std::shared_ptr<BaseNode>& node);
+
     private:
         /**
          * @brief <BR>Helper struct for creating a node struct from a lambda
@@ -385,6 +387,13 @@ namespace ImFlow
          */
         void rightClickPopUpContent(std::function<void(BaseNode* node)> content) { m_rightClickPopUp = std::move(content); }
 
+        /**
+         * @brief <BR>Pop-up when drag_dropping
+         * @details Sets the node pos when drag dropping a node to the grid
+         * @param content Function or Lambda containing only the pos of the mouse when clicked
+         */
+        void dragDropTarget(std::function<void(const ImVec2 &)> content) { m_dragdropTarget = std::move(content); }
+
         /**
          * @brief <BR>Get mouse clicking status
          * @return [TRUE] if mouse is clicked and click hasn't been consumed
@@ -522,6 +531,7 @@ namespace ImFlow
         ImGuiKey m_droppedLinkPupUpComboKey = ImGuiKey_None;
         Pin* m_droppedLinkLeft = nullptr;
         std::function<void(BaseNode* node)> m_rightClickPopUp;
+        std::function<void(const ImVec2 &)> m_dragdropTarget;
         BaseNode* m_hoveredNodeAux = nullptr;
 
         BaseNode* m_hoveredNode = nullptr;

src/ImNodeFlow.cpp

@@ -239,6 +239,18 @@ namespace ImFlow {
         m_links.push_back(link);
     }
 
+    void ImNodeFlow::emplaceNode(const ImVec2& pos, const std::shared_ptr<BaseNode>& n)
+    {
+        n->setPos(pos);
+        n->setHandler(this);
+        if (!n->getStyle())
+            n->setStyle(NodeStyle::cyan());
+
+        auto uid = reinterpret_cast<uintptr_t>(n.get());
+        n->setUID(uid);
+        m_nodes[uid] = n;
+    }
+
     void ImNodeFlow::update() {
         // Updating looping stuff
         m_hovering = nullptr;
@@ -335,5 +347,13 @@ namespace ImFlow {
         m_pinRecursionBlacklist.clear();
 
         m_context.end();
+
+        if (ImGui::BeginDragDropTarget())
+		{
+			if (m_dragdropTarget)
+				m_dragdropTarget(screen2grid(ImGui::GetMousePos()));
+
+			ImGui::EndDragDropTarget();
+		}
     }
 }