timer.d

module timer;

import derelict.sdl.sdl;
import std.string;

class Timer
{
private:
//The clock time when the timer started
int startTicks;

//The ticks stored when the timer was paused
int pausedTicks;

//The timer status
bool paused;
bool started;

public:
//Initializes variables
this()
{
	//Initialize the variables
	startTicks = 0;
	pausedTicks = 0;
	paused = false;
	started = false;    
}


//The various clock actions
void start()
{
	//Start the timer
	started = true;
	
	//Unpause the timer
	paused = false;
	
	//Get the current clock time
	startTicks = SDL_GetTicks();
}

void stop()
{
	//Stop the timer
	started = false;
	
	//Unpause the timer
	paused = false;    
}

void reset(){
	startTicks = 0;
	pausedTicks = 0;
	paused = false;
	started = false;   
}
	
void pause()
{
	//If the timer is running and isn't already paused
	if( ( started == true ) && ( paused == false ) )
	{
		//Pause the timer
		paused = true;
	
		//Calculate the paused ticks
		pausedTicks = SDL_GetTicks() - startTicks;
	}
}

void unpause()
{
	//If the timer is paused
	if( paused == true )
	{
		//Unpause the timer
		paused = false;
	
		//Reset the starting ticks
		startTicks = SDL_GetTicks() - pausedTicks;
		
		//Reset the paused ticks
		pausedTicks = 0;
	}
}


//Gets the timer's time
int get_ticks()
{	
	//If the timer is running
	if( started == true )
	{
		//If the timer is paused
		if( paused == true )
		{
		//Return the number of ticks when the timer was paused
		return pausedTicks;
		}
		else
		{
		//Return the current time minus the start time
		return SDL_GetTicks() - startTicks;
		}    
	}
	
	//If the timer isn't running
	return 0;    
}

//Checks the status of the timer
bool is_started(){return started;}
bool is_paused(){return paused;}
}