UILoader.h

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#pragma once
 
#include "Nodes/Node.h"
 
#include <string>
#include <vector>
#include <unordered_map>
 
class Widget;
class UIStyleSheet;
 
//------------------------------------------------------------
// Event binding from XML on-* attributes
//------------------------------------------------------------
 
struct UIEventBinding
{
    std::string mElementId;
    std::string mEventName;     // "click", "hover", "press", "release"
    std::string mHandlerName;   // Lua global function name
};
 
//------------------------------------------------------------
// Data binding from {{variable}} in text content
//------------------------------------------------------------
 
struct UIDataBinding
{
    Widget* mWidget = nullptr;
    std::string mTemplateText;  // Original text with {{var}} placeholders
};
 
//------------------------------------------------------------
// Load result
//------------------------------------------------------------
 
struct UILoadResult
{
    NodePtr mRootNodePtr;               // Owns the root widget (keeps tree alive)
    Widget* mRootWidget = nullptr;      // Raw pointer for convenience
    std::unordered_map<std::string, Widget*> mIdMap;
    std::unordered_map<std::string, std::vector<Widget*>> mClassMap;
    std::vector<UIEventBinding> mEventBindings;
    std::vector<UIDataBinding> mDataBindings;
};
 
//------------------------------------------------------------
// UILoader - builds widget tree from XML + CSS
//------------------------------------------------------------
 
class UILoader
{
public:
 
    static bool Load(
        const std::string& xmlSource,
        const std::string& basePath,
        UILoadResult& outResult);
 
private:
 
    UILoader() = default;
};