ModuleInput.cpp

#include "Globals.h"
#include "Application.h"
#include "ModuleInput.h"

#include "SDL\include\SDL.h"

ModuleInput::ModuleInput(Application* app, bool start_enabled) : Module(app, start_enabled)
{
	keyboard = new KEY_STATE[MAX_KEYS];
	memset(keyboard, KEY_IDLE, sizeof(KEY_STATE) * MAX_KEYS);
	memset(mouse_buttons, KEY_IDLE, sizeof(KEY_STATE) * MAX_MOUSE_BUTTONS);
}

// Destructor
ModuleInput::~ModuleInput()
{
	delete[] keyboard;
}

// Called before render is available
bool ModuleInput::Init()
{
	LOG("Init SDL input event system");
	bool ret = true;
	SDL_Init(0);

	if(SDL_InitSubSystem(SDL_INIT_EVENTS) < 0)
	{
		LOG("SDL_EVENTS could not initialize! SDL_Error: %s\n", SDL_GetError());
		ret = false;
	}

	return ret;
}

// Called every draw update
update_status ModuleInput::PreUpdate()
{
	SDL_PumpEvents();

	const Uint8* keys = SDL_GetKeyboardState(NULL);
	
	for(int i = 0; i < MAX_KEYS; ++i)
	{
		if(keys[i] == 1)
		{
			if(keyboard[i] == KEY_IDLE)
				keyboard[i] = KEY_DOWN;
			else
				keyboard[i] = KEY_REPEAT;
		}
		else
		{
			if(keyboard[i] == KEY_REPEAT || keyboard[i] == KEY_DOWN)
				keyboard[i] = KEY_UP;
			else
				keyboard[i] = KEY_IDLE;
		}
	}

	Uint32 buttons = SDL_GetMouseState(&mouse_x, &mouse_y);
	mouse_x /= SCREEN_SIZE;
	mouse_y /= SCREEN_SIZE;

	for(int i = 0; i < MAX_MOUSE_BUTTONS; ++i)
	{
		if(buttons & SDL_BUTTON(i))
		{
			if(mouse_buttons[i] == KEY_IDLE)
				mouse_buttons[i] = KEY_DOWN;
			else
				mouse_buttons[i] = KEY_REPEAT;
		}
		else
		{
			if(mouse_buttons[i] == KEY_REPEAT || mouse_buttons[i] == KEY_DOWN)
				mouse_buttons[i] = KEY_UP;
			else
				mouse_buttons[i] = KEY_IDLE;
		}
	}

	if(keyboard[SDL_SCANCODE_ESCAPE] == KEY_UP)
		return UPDATE_STOP;

	return UPDATE_CONTINUE;
}

// Called before quitting
bool ModuleInput::CleanUp()
{
	LOG("Quitting SDL input event subsystem");
	SDL_QuitSubSystem(SDL_INIT_EVENTS);
	return true;
}