SDL2-Galaga/ScreenManager.cpp at master · OneMeanDragon/SDL2-Galaga · GitHub

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#include "ScreenManager.h"

ScreenManager* ScreenManager::sInstance = NULL;

ScreenManager* ScreenManager::Instance()
{
	if (sInstance == NULL)
	{
		sInstance = new ScreenManager();
	}
	return sInstance;
}

void ScreenManager::Release()
{
	delete sInstance;
	sInstance = NULL;
}

ScreenManager::ScreenManager()
{
	mInput = InputManager::Instance();
	mBackgroundStars = BackgroundStars::Instance();
	mStartScreen = new StartScreen();
	mPlayScreen = new PlayScreen();
	mCurrentScreen = SCREENS::start;
}

ScreenManager::~ScreenManager()
{
	mInput = NULL;
	BackgroundStars::Release();
	mBackgroundStars = NULL;
	delete mStartScreen;
	mStartScreen = NULL;
	delete mPlayScreen;
	mPlayScreen = NULL;
}

void ScreenManager::Update()
{
	mBackgroundStars->Update();

	switch (mCurrentScreen)
	{
	case SCREENS::start:
		mStartScreen->Update();
		if (mInput->KeyPressed(SDL_SCANCODE_RETURN))
		{
			mCurrentScreen = SCREENS::play;
			mStartScreen->ResetAnimation();
			mPlayScreen->StartNewGame();
		}
		break;
	case SCREENS::play:
		mPlayScreen->Update();
		if (mPlayScreen->GameOver())
		{
			mCurrentScreen = SCREENS::start;
		}
		break;
	}
}

void ScreenManager::Render()
{
	mBackgroundStars->Render();

	switch (mCurrentScreen)
	{
	case SCREENS::start:
		mStartScreen->Render();
		break;
	case SCREENS::play:
		mPlayScreen->Render();
		break;
	}
}