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/*
* KSeg
* Copyright (C) 1999-2006 Ilya Baran
*
* 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.
*
* Send comments and/or bug reports to:
* ibaran@mit.edu
*/
#include "G_arcSector.H"
#include "G_arcSegment.H"
#include "G_drawstyle.H"
#include "KSegView.H"
#include "G_segment.H"
#include "G_line.H"
#include "G_ray.H"
//drawing:
void G_arcSegment::draw(QPainter &p, const G_drawstyle &d, bool selected)
{ //FIXME!
double r = arc.getRadius();
QRect re = p.window();
if(!inRect(re)) return;
if(r > DRAW_MAX / 2) {
//draw big arc...
return;
}
p.setBrush(d.getBrush());
p.setPen(QPen(Qt::NoPen));
const double angle_scale = -16 * 180. / M_PI;
if(p.device()->isExtDev() || p.hasViewXForm()) { //draw at higher accuracy to a printer or image
p.scale(0.125, .125);
p.drawChord(ROUND((arc.getCenter().getX() - r) * 8),
ROUND((arc.getCenter().getY() - r) * 8),
ROUND(r * 16), ROUND(r * 16),
ROUND(((arc.getP2() - arc.getCenter()).angle() -
acos(arc.getCosangle())) * angle_scale),
ROUND(angle_scale * acos(arc.getCosangle()) * 2));
p.scale(8, 8);
return;
}
p.drawChord(ROUND(arc.getCenter().getX() - r),
ROUND(arc.getCenter().getY() - r),
ROUND(r * 2), ROUND(r * 2),
ROUND(((arc.getP2() - arc.getCenter()).angle() -
acos(arc.getCosangle())) * angle_scale),
ROUND(angle_scale * acos(arc.getCosangle()) * 2));
if(selected) {
if(KSegView::getSelectType() == KSegView::BORDER_SELECT) {
p.setBrush(QBrush(G_drawstyle::getBorderColor(d.getBrush().color()), Qt::BDiagPattern));
}
if(selected && KSegView::getSelectType() == KSegView::BLINKING_SELECT) {
QColor c(QTime::currentTime().msec() * 17, 255, 255, QColor::Hsv);
p.setBrush(QBrush(c, Qt::BDiagPattern));
}
p.drawChord(ROUND(arc.getCenter().getX() - r),
ROUND(arc.getCenter().getY() - r),
ROUND(r * 2), ROUND(r * 2),
ROUND(((arc.getP2() - arc.getCenter()).angle() -
acos(arc.getCosangle())) * angle_scale),
ROUND(angle_scale * acos(arc.getCosangle()) * 2));
}
p.setBrush(QBrush());
return;
}
G_point G_arcSegment::getNearestPoint(const G_point &p) const
{ //not really--returns point if point is in arcsegment, center of arc otherwise.
if((p - arc.getCenter()).length() > arc.getRadius()) return arc.getP2();
if((p - arc.getPointOnCurve(0)) % (arc.getPointOnCurve(1) - arc.getPointOnCurve(0)) *
(arc.getCW() ? -1 : 1) < 0)
return arc.getP2();
return p;
}
bool G_arcSegment::inRect(const QRect &rect) const
{
if(getNearestPoint(rect.topRight()) == G_point(rect.topRight())) return true;
if(getNearestPoint(rect.topLeft()) == G_point(rect.topLeft())) return true;
if(getNearestPoint(rect.bottomRight()) == G_point(rect.bottomRight())) return true;
if(getNearestPoint(rect.bottomLeft()) == G_point(rect.bottomLeft())) return true;
if(arc.inRect(rect)) return true;
if(G_segment(arc.getPointOnCurve(1), arc.getPointOnCurve(0)).inRect(rect)) return true;
return false;
}
double G_arcSegment::getArea() const
{
return G_arcSector(arc).getArea() - SQR(arc.getRadius()) / 2 * sin(arc.getArcAngle());
}
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