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/*
* This file is part of the KDE System Control Tool,
* Copyright (C)1999 Thorsten Westheider <twesthei@physik.uni-bielefeld.de>
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Pie3DWidget was inspired by Christian Poulter's KDiskFree
*
****************************************************************************/
#include <qpainter.h>
#include "pie3dwidget.h"
Pie3DWidget::Pie3DWidget(QWidget *parent, const char *name) : QWidget(parent, name),
_totalsize(0)
{
_piecelist.setAutoDelete(true);
_piecelist.clear();
}
void Pie3DWidget::addPiece(int size, const QColor& color)
{
_totalsize += size;
_piecelist.append(new Pie3DPiece(size, color));
repaint();
}
int Pie3DWidget::heightForWidth(int w) const
{
return (int) (w*0.6);
}
QSize Pie3DWidget::minimumSizeHint() const
{
return QSize(60, 40);
}
QSize Pie3DWidget::sizeHint() const
{
return QSize(width(), (int)(width()*0.6));
}
/*
* Protected methods
********************/
void Pie3DWidget::paintEvent(QPaintEvent *ev)
{
QPainter p;
QColor widgetbg = palette().normal().background();
QColor black = QColor(black);
int w = width();
int h = height();
int pieh = h/4;
int halfrot = 180*16;
int fullrot = 360*16;
int bowpos = 0;
int i, bowlen, bowcut;
if (_piecelist.isEmpty()) return;
p.begin(this);
p.setClipRegion(ev->region());
for (Pie3DPiece *piece = _piecelist.first(); piece; piece = _piecelist.next())
{
QPalette piecepal(piece->color(), widgetbg);
bowlen = (int) (((double) piece->size())/_totalsize*fullrot);
p.setPen((_piecelist.count() > 1) ? black : _piecelist.first()->color());
p.setBrush(piecepal.normal().button());
p.drawPie(0, 0, w, h-pieh, bowpos, bowlen);
if (bowpos+bowlen >= halfrot) // Part of the footer is visible
{
bowcut = (bowpos < halfrot) ? halfrot-bowpos : 0;
bowpos += bowcut;
bowlen -= bowcut;
p.setPen(piecepal.normal().mid());
for (i = 0; i < pieh; i++) p.drawArc(0, i, w, h-pieh, bowpos, bowlen);
}
bowpos += bowlen;
}
p.setPen(black);
p.drawArc(0, 0, w, h-pieh, 0, fullrot);
p.drawArc(0, pieh-1, w, h-pieh, 0, -halfrot);
p.drawLine(0, (h-pieh)/2, 0, (h+pieh)/2-1);
p.drawLine(w-1, (h-pieh)/2, w-1, (h+pieh)/2-1);
p.end();
}
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