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/* ============================================================
*
* This file is a part of digiKam project
* http://www.digikam.org
*
* Date : 2007-01-08
* Description : Hue/Saturation preview widget
*
* Copyright (C) 2007 by Gilles Caulier <caulier dot gilles at gmail dot com>
*
* 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, 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.
*
* ============================================================ */
// TQt includes.
#include <tqdrawutil.h>
#include <tqimage.h>
#include <tqpainter.h>
#include <tqpixmap.h>
// KDE includes.
#include <tdeapplication.h>
#include <tdelocale.h>
#include <kimageeffect.h>
// Local includes.
#include "hslmodifier.h"
#include "dimg.h"
#include "hspreviewwidget.h"
#include "hspreviewwidget.moc"
namespace DigikamImagesPluginCore
{
class HSPreviewWidgetPrivate
{
public:
HSPreviewWidgetPrivate()
{
hue = 0.0;
sat = 0.0;
}
int xBorder;
double hue;
double sat;
TQPixmap pixmap;
};
HSPreviewWidget::HSPreviewWidget(TQWidget *parent, int xBorder)
: TQWidget(parent, 0, TQt::WDestructiveClose)
{
d = new HSPreviewWidgetPrivate;
d->xBorder = xBorder;
}
HSPreviewWidget::~HSPreviewWidget()
{
delete d;
}
void HSPreviewWidget::setHS(double hue, double sat)
{
d->hue = hue;
d->sat = sat;
updatePixmap();
update();
}
void HSPreviewWidget::resizeEvent( TQResizeEvent * )
{
updatePixmap();
}
void HSPreviewWidget::paintEvent( TQPaintEvent * )
{
bitBlt(this, 0+d->xBorder, 0, &d->pixmap);
}
void HSPreviewWidget::updatePixmap()
{
int xSize = width()-2*d->xBorder;
int ySize = height();
Digikam::DImg image(xSize, ySize, false, false, 0, false);
TQColor col;
uint *p;
for ( int s = ySize-1; s >= 0; s-- )
{
p = (uint *)image.scanLine(ySize - s - 1);
for( int h = 0 ; h < xSize ; h++ )
{
col.setHsv( 359*h/(xSize-1), 255, 192 );
*p = col.rgb();
p++;
}
}
Digikam::HSLModifier cmod;
cmod.setHue(d->hue);
cmod.setSaturation(d->sat);
cmod.setLightness(0.0);
cmod.applyHSL(image);
d->pixmap = image.convertToPixmap();
}
} // NameSpace DigikamImagesPluginCore
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