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// -*- Mode: c++; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 4; -*-
/* This file is part of the KDE project
Copyright (C) 2005 Thorsten Zachmann <[email protected]>
Base code from Kontour.
Copyright (C) 1998 Kai-Uwe Sattler ([email protected])
Copyright (C) 2001 Toshitaka Fujioka <[email protected]>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "KPrPolygonPreview.h"
#include <qpainter.h>
#include <math.h>
KPrPolygonPreview::KPrPolygonPreview( QWidget* parent, const char* name)
: QFrame( parent, name )
{
setFrameStyle( WinPanel | Sunken );
setBackgroundColor( white );
setMinimumSize( 200, 100 );
}
void KPrPolygonPreview::drawContents( QPainter *painter )
{
double angle = 2 * M_PI / nCorners;
double diameter = static_cast<double>( QMAX( width(), height() ) - 10 );
double radius = diameter * 0.5;
painter->setWindow( qRound( -radius ), qRound( -radius ), qRound( diameter ), qRound( diameter ) );
painter->setViewport( 5, 5, width() - 10, height() - 10 );
painter->setPen( pen );
painter->setBrush( brush );
QPointArray points( isConcave ? nCorners * 2 : nCorners );
points.setPoint( 0, 0, qRound( -radius ) );
if ( isConcave ) {
angle = angle / 2.0;
double a = angle;
double r = radius - ( sharpness / 100.0 * radius );
for ( int i = 1; i < nCorners * 2; ++i ) {
double xp, yp;
if ( i % 2 ) {
xp = r * sin( a );
yp = -r * cos( a );
}
else {
xp = radius * sin( a );
yp = -radius * cos( a );
}
a += angle;
points.setPoint( i, (int)xp, (int)yp );
}
}
else {
double a = angle;
for ( int i = 1; i < nCorners; ++i ) {
double xp = radius * sin( a );
double yp = -radius * cos( a );
a += angle;
points.setPoint( i, (int)xp, (int)yp );
}
}
painter->drawPolygon( points );
}
void KPrPolygonPreview::slotConvexConcave( bool convexConcave )
{
isConcave = convexConcave;
repaint();
}
void KPrPolygonPreview::slotConvexPolygon()
{
isConcave = false;
repaint();
}
void KPrPolygonPreview::slotConcavePolygon()
{
isConcave = true;
repaint();
}
void KPrPolygonPreview::slotCornersValue( int value )
{
nCorners = value;
repaint();
}
void KPrPolygonPreview::slotSharpnessValue( int value )
{
sharpness = value;
repaint();
}
#include "KPrPolygonPreview.moc"
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