NodeGraphPanel.h

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/*
 * Olympe Blueprint Editor - Node Graph Panel
 * 
 * GUI panel for visual node graph editing using ImNodes
 * Supports Behavior Trees and HFSM editing
 */
 
#pragma once
 
#include <string>
#include <vector>
#include "NodeGraphManager.h"
 
namespace Olympe
{
    /**
     * NodeGraphPanel - ImGui/ImNodes panel for node graph editing
     * Provides visual editor for behavior trees and state machines
     */
    class NodeGraphPanel
    {
    public:
        NodeGraphPanel();
        ~NodeGraphPanel();
 
        void Initialize();
        void Shutdown();
        void Render();
 
 
        void RenderGraphTabs();
        void RenderGraph();
        void RenderContextMenu();
        void RenderNodeProperties();
        void RenderNodeEditModal();
        void HandleKeyboardShortcuts();
        void HandleNodeInteractions(int graphID);
 
        // Node creation helpers
        void CreateNewNode(const char* nodeType, float x, float y);
        
        // Helper for converting global UID to local node ID
        int GlobalUIDToLocalNodeID(int globalUID, int graphID) const
        {
            return globalUID - (graphID * 10000);  // 10000 is GRAPH_ID_MULTIPLIER
        }
 
        // ImNodes state
        int m_SelectedNodeId = -1;
        int m_SelectedLinkId = -1;
        bool m_ShowContextMenu = false;
        float m_ContextMenuPosX = 0.0f;
        float m_ContextMenuPosY = 0.0f;
        
        // Node editing modal
        bool m_ShowNodeEditModal = false;
        GraphNode* m_EditingNode = nullptr;
        int m_EditingNodeId = -1;
        char m_NodeNameBuffer[256];
        
        // For tracking node movement (undo/redo)
        bool m_NodeDragStarted = false;
        int m_DraggedNodeId = -1;
        float m_DragStartX = 0.0f;
        float m_DragStartY = 0.0f;
    };
}