ScreenList.cpp

#include "ScreenList.h"
#include "IGameScreen.h"
#include "IMainGame.h"

namespace NeroEngine{
	ScreenList::ScreenList(IMainGame* game):_game(game){
	
	}

	IGameScreen*  ScreenList::moveNext(){
		IGameScreen* currentScreen = getCurrent();
		if (currentScreen->getNextScreenIndex()!=SCREEN_INEDX_NO_SCREEN){

			_currentScreenIndex = currentScreen->getNextScreenIndex();

		}
		return getCurrent();
	}
	IGameScreen*  ScreenList::movePrevious(){
		IGameScreen* currentScreen = getCurrent();
		if (currentScreen->getPreviousScreenIndex() != SCREEN_INEDX_NO_SCREEN){

			_currentScreenIndex = currentScreen->getPreviousScreenIndex();

		}
		return getCurrent();
	}

	void ScreenList::setScreen(int nextScreen){
		_currentScreenIndex = nextScreen;
	
	}
	void ScreenList::addScreen(IGameScreen* newScreen){
		newScreen->_screenIndex = _screens.size();

		_screens.push_back(newScreen);
		newScreen->build();
		newScreen->setParentGame(_game);
	}

	void ScreenList::destroy(){
		for (int i = 0; i < _screens.size();i++){
			_screens[i]->destroy();
		}
		_screens.resize(0);
		_currentScreenIndex = SCREEN_INEDX_NO_SCREEN;
	}
	ScreenList::~ScreenList(){
		destroy();
	}
	IGameScreen* ScreenList::getCurrent(){

		if (_currentScreenIndex == SCREEN_INEDX_NO_SCREEN) return nullptr;

			return _screens[_currentScreenIndex];

	}

}