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// pacman.cpp - Implementation of CPacman
//
// WinDirStat - Directory Statistics
// Copyright (C) 2003-2005 Bernhard Seifert
// Copyright (C) 2004-2017 WinDirStat Team (windirstat.net)
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
#include "stdafx.h"
#include "selectobject.h"
#include "pacman.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#endif
namespace
{
const ULONGLONG UPDATEINTERVAL = 40; // ms
const double MOUTHSPEED = 0.0030; // aperture alteration / ms
}
CPacman::CPacman()
: m_bgcolor(::GetSysColor(COLOR_WINDOW))
, m_speed(0.0005)
, m_moving(false)
, m_readJobs(0)
, m_toTheRight(true)
, m_position(0)
, m_mouthOpening(false)
, m_aperture(0)
, m_lastUpdate(0)
{
Reset();
}
void CPacman::Reset()
{
m_toTheRight = true;
m_position = 0;
m_mouthOpening = true;
m_aperture = 0;
}
void CPacman::SetBackgroundColor(COLORREF color)
{
m_bgcolor = color;
}
void CPacman::SetSpeed(double speed)
{
m_speed = speed;
}
void CPacman::Start(bool start)
{
m_moving = start;
m_lastUpdate = _GetTickCount64();
}
bool CPacman::Drive(ULONGLONG readJobs)
{
m_readJobs = (double)readJobs;
if(!m_moving)
{
return false;
}
const ULONGLONG now = _GetTickCount64();
const ULONGLONG delta = now - m_lastUpdate;
if(delta < UPDATEINTERVAL)
{
return false;
}
m_lastUpdate = now;
UpdatePosition(m_position, m_toTheRight, m_speed * delta);
UpdatePosition(m_aperture, m_mouthOpening, MOUTHSPEED * delta);
return true;
}
void CPacman::Draw(CDC *pdc, const CRect& rect)
{
pdc->FillSolidRect(rect, m_bgcolor);
CRect rc = rect;
rc.DeflateRect(5, 1);
if(rc.Height() % 2 == 0)
{
rc.bottom--;
}
int diameter = rc.Height();
int left = rc.left + (int)(m_position * (rc.Width() - diameter));
rc.left = left;
rc.right = left + diameter;
CPen pen(PS_SOLID, 1, RGB(0,0,0));
CSelectObject sopen(pdc, &pen);
CBrush brush(CalculateColor());
CSelectObject sobrush(pdc, &brush);
CPoint ptStart;
CPoint ptEnd;
int hmiddle = rc.top + diameter / 2;
int mouthcy = (int)(m_aperture * m_aperture * diameter);
int upperMouthcy = mouthcy;
int lowerMouthcy = mouthcy;
if(m_toTheRight)
{
ptStart.x = ptEnd.x = rc.right;
ptStart.y = hmiddle - upperMouthcy;
ptEnd.y = hmiddle + lowerMouthcy;
}
else
{
ptStart.x = ptEnd.x = rc.left;
ptStart.y = hmiddle + lowerMouthcy;
ptEnd.y = hmiddle - upperMouthcy;
}
pdc->Pie(rc, ptStart, ptEnd);
}
void CPacman::UpdatePosition(double& position, bool& up, double diff)
{
ASSERT(diff >= 0.0);
ASSERT(position >= 0.0);
ASSERT(position <= 1.0);
while(diff > 0.0)
{
if(up)
{
if(position + diff > 1.0)
{
diff = position + diff - 1.0;
position = 1.0;
up = false;
}
else
{
position += diff;
diff = 0;
}
}
else
{
if(position - diff < 0.0)
{
diff = - (position - diff);
position = 0.0;
up = true;
}
else
{
position -= diff;
diff = 0;
}
}
}
}
COLORREF CPacman::CalculateColor()
{
static const double pi2 = (3.1415926535897932384626433832795 / 2);
ASSERT(m_readJobs >= 0);
double a = atan(m_readJobs / 18) / pi2;
ASSERT(a >= 0.0);
ASSERT(a <= 1.0);
/*
// a == 1 --> yellow
// a == 0 --> green
int red = (int)(a * 255);
return RGB(red, 255, 0);
*/
// a == 1 --> yellow
// a == 0 --> bgcolor
int red = (int)(a * 255 + (1 - a) * RGB_GET_RVALUE(m_bgcolor));
int green = (int)(a * 255 + (1 - a) * RGB_GET_GVALUE(m_bgcolor));
int blue = (int)( (1 - a) * RGB_GET_BVALUE(m_bgcolor));
return RGB(red, green, blue);
}
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