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/*
* The TaskJuggler Project Management Software
*
* Copyright (c) 2001, 2002, 2003, 2004, 2005 by Chris Schlaeger <cs@kde.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* $Id: TjGanttZoomStep.cpp 1307 2006-07-19 13:09:16Z cs $
*/
#include "TjGanttZoomStep.h"
#include <assert.h>
#include <qfontmetrics.h>
#include "Utility.h"
int
TjGanttZoomStep::getPixelsPerYear() const
{
switch (stepUnit2)
{
case hour:
return stepSize * 24 * 365;
case day:
return stepSize * 365;
case week:
return stepSize * 52;
case month:
return stepSize * 12;
case quarter:
return stepSize * 4;
case year:
return stepSize;
default:
assert(0);
}
return 0;
}
int
TjGanttZoomStep::calcStepSize(int ppyHint)
{
QFontMetrics fm(font);
int margin = (int) (0.2 * fm.height());
int widthPattern1 = fm.width(pattern1) + 2 * margin + 1;
int widthPattern2 = fm.width(pattern2) + 2 * margin + 1;
// Now pick the wider one.
int minWidth = widthPattern1 / ratio > widthPattern2 ?
widthPattern1 / ratio : widthPattern2;
int scaleFactor;
switch (stepUnit2)
{
case hour:
scaleFactor = 24 * 365;
break;
case day:
scaleFactor = 365;
break;
case week:
scaleFactor = 52;
break;
case month:
scaleFactor = 12;
break;
case quarter:
scaleFactor = 4;
break;
case year:
scaleFactor = 1;
break;
default:
assert(0);
}
stepSize = ppyHint / scaleFactor > minWidth ?
ppyHint / scaleFactor : minWidth;
return stepSize * scaleFactor;
}
time_t
TjGanttZoomStep::intervalStart(bool firstRow, time_t t)
{
switch (firstRow ? stepUnit1 : stepUnit2)
{
case hour:
return midnight(t);
case day:
return midnight(t);
case week:
return beginOfWeek(t, weekStartsMonday);
case month:
return beginOfMonth(t);
case quarter:
return beginOfQuarter(t);
case year:
return beginOfYear(t);
default:
assert(0);
}
return 0;
}
time_t
TjGanttZoomStep::nextIntervalStart(bool firstRow, time_t t)
{
switch (firstRow ? stepUnit1 : stepUnit2)
{
case hour:
return hoursLater(1, t);
case day:
return sameTimeNextDay(t);
case week:
return sameTimeNextWeek(t);
case month:
return sameTimeNextMonth(t);
case quarter:
return sameTimeNextQuarter(t);
case year:
return sameTimeNextYear(t);
default:
assert(0);
}
return 0;
}
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