appeventhandler.h

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
#pragma once
 
// Local Includes
#include "app.h"
 
// External Includes
#include <rtti/typeinfo.h>
 
namespace nap
{
    class NAPAPI AppEventHandler
    {
        RTTI_ENABLE()
    public:
        AppEventHandler(BaseApp& app);
 
        // Default Destructor
        virtual ~AppEventHandler() = default;
 
        AppEventHandler(AppEventHandler&) = delete;
        AppEventHandler& operator=(const AppEventHandler&) = delete;
 
        AppEventHandler(AppEventHandler&&) = delete;
        AppEventHandler& operator=(AppEventHandler&&) = delete;
 
        virtual void start()                { }
 
        virtual void process()              { }
 
        virtual void shutdown()             { }
 
        template<typename T>
        T& getApp();
 
    protected:
        BaseApp& mApp;                      // The app associated with this app event handler
    };
 
 
    // Template definitions
 
    template<typename T>
    T& nap::AppEventHandler::getApp()
    {
        assert(mApp.get_type().is_derived_from(RTTI_OF(T)));
        return static_cast<T&>(mApp);
    }
}