/*******************************************************************************
        This file is Part of the ZEngine Library for 2D game development.
                   Copyright (C) 2002, 2003 James Turk

                     Licensed under a BSD-style license.

    The maintainer of this library is James Turk (james@conceptofzero.net) 
     and the home of this Library is http://www.zengine.sourceforge.net
*******************************************************************************/

/*!
\par File Header: 
File: ZE_ZTimer.cpp <br>
Description: Implementation source file for core ZEngine Timer Object. <br>
Author(s): James Turk <br>
$Id: ZE_ZTimer.cpp,v 1.3 2002/12/29 06:52:07 cozman Exp $<br>

    \file ZE_ZTimer.cpp
    \brief Source file for ZTimer.

    Implementation of ZTimer, the basic Timer class for ZEngine.
**/

#include "ZE_ZTimer.h"

namespace ZE
{

Uint32 ZTimer::GetParentTime()
{
    if(rUseZEngine)
        return rEngine->GetTime();
    else
        return SDL_GetTicks();
}

ZTimer::ZTimer(bool useZEngine)
{
    rUseZEngine = useZEngine;
    rPaused = false;
    Reset();
}

void ZTimer::Reset()
{
    rLastPause = rPausedTime = GetParentTime();
    rPaused = false;
}

void ZTimer::Pause()
{
    if(!rPaused)
    {
        rLastPause = GetParentTime();
        rPaused = true;
    }
}

void ZTimer::Unpause()
{
    if(rPaused)
    {
        rPausedTime += (GetParentTime()-rLastPause);
        rPaused = false;
    }
}

Uint32 ZTimer::GetTime()
{
    if(rPaused)
        return GetParentTime() - (rPausedTime +  (GetParentTime() - rLastPause));
    else
        return GetParentTime() - rPausedTime;
}

bool ZTimer::IsPaused()
{
    return rPaused;
}

}