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/*
* Copyright (c) 2004 Sven Langkamp <longamp@reallygood.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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <math.h>
#include <tqpoint.h>
#include <tqpainter.h>
#include <tqimage.h>
#include <kdebug.h>
#include "ko_color_wheel.h"
#define pi 3.14159265
KoColorWheel::KoColorWheel( TQWidget *parent, const char *name ): KXYSelector( parent, name )
{
}
void KoColorWheel::resizeEvent( TQResizeEvent * )
{
drawWheel(&m_pixmap);
setRange( 0, 0, contentsRect().width(), contentsRect().height() );
}
void KoColorWheel::drawContents( TQPainter *painter )
{
painter->drawPixmap( contentsRect().x(), contentsRect().y(), m_pixmap );
}
void KoColorWheel::drawWheel( TQPixmap *pixmap )
{
int size = TQMIN(contentsRect().width(), contentsRect().height());
TQPoint center(size/2, size/2);
TQImage image( size, size, 32 );
image.fill(colorGroup ().background().pixel());
TQColor col;
int a, b, h, s;
uint *p;
for ( a = size-1; a >= 0; a-- )
{
p = (uint*) image.scanLine( size - a - 1 );
for( b = 0; b < size; b++ )
{
s = (int)(sqrt(pow(a-center.y(), 2) + pow(b-center.x(), 2))/(size/2)*255);
if(s<=255)
{
h = (int)(atan2( b-center.x(), a-center.y())* 180.0 / pi);
if(h<0) h += 360;
if(h>360) h -= 360;
col.setHsv( h, s, 210 );
*p = col.rgb();
}
p++;
}
}
pixmap->convertFromImage( image );
}
void KoColorWheel::mousePressEvent( TQMouseEvent *e )
{
int size = TQMIN(contentsRect().width(), contentsRect().height());
TQPoint center(size/2, size/2);
int xVal, yVal;
valuesFromPosition( e->pos().x() - 2, e->pos().y() - 2, xVal, yVal );
setValues( xVal, yVal );
int h, s;
s = (int)(sqrt(pow(yVal-center.y(), 2) + pow(xVal-center.x(), 2))/(size/2)*255);
if(s>255) s = 255;
h = (int)(atan2( xVal-center.x(), yVal-center.y())* 180.0 / pi);
if(h<0) h += 360;
if(h>360) h -= 360;
m_color.setHSV( h, s, 255);
emit valueChanged(m_color);
}
void KoColorWheel::mouseMoveEvent( TQMouseEvent *e )
{
mousePressEvent( e );
}
void KoColorWheel::slotSetValue(const KoColor& c)
{
int size = TQMIN(contentsRect().width(), contentsRect().height());
TQPoint center(size/2, size/2);
int xVal, yVal;
xVal = (int)(sin(c.H() * pi /180) * c.S() / 255 * (size/2) + center.x());
yVal = (int)(cos(c.H() * pi /180) * c.S() / 255 * (size/2) + center.y());
setValues( xVal, yVal );
}
#include "ko_color_wheel.moc"
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