ckObject.h

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/*
 *
 * Clapkit
 * ----------------------------------------------------------------------
 * A wrapper for creating a 'generalized' app for Classic MacOS
 * that (hopefully) can be ported easily to other platforms.
 *
 * CKObject
 * ----------------------------------------------------------------------
 * The base of everything we have.
 *
 */
 
#pragma once
 
#include "ckProperty.h"
#include <map>
 
#define CKOBSERVEVALUE(name) [this]() { this->RaisePropertyChange(name); };
 
enum class CKEventType;
class CKEvent;
class CKObject;
 
using CKEventHandlerFunc = std::function<void(const CKEvent&)>;
 
using CKPropertyObserverFunc = std::function<void(const CKObject*, const char*)>;
 
class CKObject {
 
    public:
        CKObject();
        virtual ~CKObject();
        virtual void AddHandler(CKEventType type, CKEventHandlerFunc cb);
        virtual void RemoveHandler(CKEventType type);
        virtual bool HasHandler(CKEventType type) const;
        virtual bool HandleEvent(const CKEvent& evt);
        virtual void SetPropertyObserver(CKPropertyObserverFunc cb);
        virtual void UnsetPropertyObserver();
        virtual void RaisePropertyChange(const char* propertyName);
 
    protected:
        std::map<CKEventType, CKEventHandlerFunc> __handlers;
        CKPropertyObserverFunc propertyObserverCB = nullptr;
};