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/*
* Copyright (c) 2004 Cyrille Berger <cberger@cberger.net>
* 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 "kis_gradient_slider_widget.h"
#include <tqpainter.h>
#include <kdebug.h>
#include <tdepopupmenu.h>
#include <klocale.h>
#include "kis_autogradient_resource.h"
#define MARGIN 5
#define HANDLE_SIZE 10
KisGradientSliderWidget::KisGradientSliderWidget(TQWidget *parent, const char* name, WFlags f )
: TQWidget( parent, name, f),
m_currentSegment(0),
m_selectedSegment(0),
m_drag(0)
{
setMinimumHeight(30);
m_segmentMenu = new TDEPopupMenu();
m_segmentMenu->insertItem(i18n("Split Segment"), SPLIT_SEGMENT);
m_segmentMenu->insertItem(i18n("Duplicate Segment"), DUPLICATE_SEGMENT);
m_segmentMenu->insertItem(i18n("Mirror Segment"), MIRROR_SEGMENT);
m_segmentMenu->insertItem(i18n("Remove Segment"), REMOVE_SEGMENT);
connect( m_segmentMenu, TQT_SIGNAL( activated(int) ), TQT_SLOT( slotMenuAction(int) ) );
}
void KisGradientSliderWidget::setGradientResource( KisAutogradientResource* agr)
{
m_autogradientResource = agr;
m_selectedSegment = m_autogradientResource->segmentAt(0.0);
emit sigSelectedSegment( m_selectedSegment );
}
void KisGradientSliderWidget::paintEvent ( TQPaintEvent* pe )
{
TQWidget::paintEvent( pe );
TQPixmap pixmap( width(), height() );
pixmap.fill( colorGroup().background() );
TQPainter painter( &pixmap );
painter.setPen( TQt::black );
painter.drawRect( MARGIN, MARGIN, width() - 2 * MARGIN, height()- 2 * MARGIN - HANDLE_SIZE );
if(m_autogradientResource)
{
TQImage img = m_autogradientResource->generatePreview(width()- 2* MARGIN - 2, height()- 2* MARGIN - HANDLE_SIZE - 2);
TQPixmap pixmap(img.width(), img.height());
if (!img.isNull()) {
m_pixmapIO.putImage(&pixmap, 0, 0, &img);
painter.drawPixmap( MARGIN + 1, MARGIN + 1, pixmap, 0, 0, pixmap.width(), pixmap.height());
}
painter.fillRect( MARGIN + 1, height()- MARGIN - HANDLE_SIZE, width() - 2 * MARGIN, HANDLE_SIZE, TQBrush( TQt::white ) );
if( m_selectedSegment )
{
TQRect selection( tqRound( m_selectedSegment->startOffset()*(double)(width()- 2 * MARGIN - 2) ) + 6,
height()- HANDLE_SIZE - MARGIN,
tqRound( ( m_selectedSegment->endOffset() - m_selectedSegment->startOffset() )*(double)(width()-12) ),
HANDLE_SIZE );
painter.fillRect( selection, TQBrush( colorGroup().highlight() ) );
}
TQPointArray triangle(3);
TQValueVector<double> handlePositions = m_autogradientResource->getHandlePositions();
int position;
painter.setBrush( TQBrush( TQt::black) );
for (uint i = 0; i < handlePositions.count(); i++)
{
position = tqRound( handlePositions[i] * (double)( width()-12) ) + 6;
triangle[0] = TQPoint(position, height() - HANDLE_SIZE - MARGIN );
triangle[1] = TQPoint(position + (HANDLE_SIZE / 2 - 1), height() - MARGIN );
triangle[2] = TQPoint(position - (HANDLE_SIZE / 2 - 1), height() - MARGIN );
painter.drawPolygon(triangle);
}
painter.setBrush( TQBrush( TQt::white ) );
TQValueVector<double> middleHandlePositions = m_autogradientResource->getMiddleHandlePositions();
for (uint i = 0; i < middleHandlePositions.count(); i++)
{
position = tqRound( middleHandlePositions[i] * (double)(width()-12) ) + 6;
triangle[0] = TQPoint(position, height()-HANDLE_SIZE - MARGIN);
triangle[1] = TQPoint(position + (HANDLE_SIZE / 2 - 2), height() - MARGIN);
triangle[2] = TQPoint(position - (HANDLE_SIZE / 2 - 2), height() - MARGIN);
painter.drawPolygon(triangle);
}
}
bitBlt( this, 0, 0, &pixmap, 0, 0, pixmap.width(), pixmap.height(), TQt::CopyROP);
}
void KisGradientSliderWidget::mousePressEvent( TQMouseEvent * e )
{
TQWidget::mousePressEvent( e );
if( ( e->y() < MARGIN || e->y() > height() - MARGIN ) || ( e->x() < MARGIN || e->x() > width() - MARGIN ) || e-> button() != Qt::LeftButton )
return;
double t = (double)(e->x() - MARGIN) / (double)(width() - 2 * MARGIN);
KisGradientSegment* segment = 0;
segment = m_autogradientResource->segmentAt(t);
if(segment != 0)
{
m_currentSegment = segment;
TQRect leftHandle( tqRound(m_currentSegment->startOffset() * (double)(width()-2*MARGIN-2)+ MARGIN - (HANDLE_SIZE/2 - 1 )),
height() - HANDLE_SIZE,
HANDLE_SIZE - 1,
HANDLE_SIZE);
TQRect middleHandle( tqRound(m_currentSegment->middleOffset() * (double)(width()-2*MARGIN-2)+ MARGIN - (HANDLE_SIZE/2 -2) ),
height() - HANDLE_SIZE - MARGIN,
HANDLE_SIZE - 1,
HANDLE_SIZE);
TQRect rightHandle( tqRound(m_currentSegment->endOffset() * (double)(width()-2*MARGIN-2)+ MARGIN - (HANDLE_SIZE/2 - 1 )),
height() - HANDLE_SIZE,
HANDLE_SIZE - 1,
HANDLE_SIZE);
// Change the activation order of the handles to avoid deadlocks
if( t > 0.5 )
{
if( leftHandle.contains( e->pos() ) )
m_drag = LEFT_DRAG;
else if( middleHandle.contains( e->pos() ) )
m_drag = MIDDLE_DRAG;
else if( rightHandle.contains( e->pos() ) )
m_drag = RIGHT_DRAG;
}
else
{
if( rightHandle.contains( e->pos() ) )
m_drag = RIGHT_DRAG;
else if( middleHandle.contains( e->pos() ) )
m_drag = MIDDLE_DRAG;
else if( leftHandle.contains( e->pos() ) )
m_drag = LEFT_DRAG;
}
if( m_drag == NO_DRAG )
{
m_selectedSegment = m_currentSegment;
emit sigSelectedSegment( m_selectedSegment );
}
}
repaint(false);
}
void KisGradientSliderWidget::mouseReleaseEvent ( TQMouseEvent * e )
{
TQWidget::mouseReleaseEvent( e );
m_drag = NO_DRAG;
}
void KisGradientSliderWidget::mouseMoveEvent( TQMouseEvent * e )
{
TQWidget::mouseMoveEvent( e );
if( ( e->y() < MARGIN || e->y() > height() - MARGIN ) || ( e->x() < MARGIN || e->x() > width() - MARGIN ) )
return;
double t = (double)(e->x() - MARGIN) / (double)(width() - 2 * MARGIN);
switch( m_drag )
{
case RIGHT_DRAG:
m_autogradientResource->moveSegmentEndOffset( m_currentSegment, t );
break;
case LEFT_DRAG:
m_autogradientResource->moveSegmentStartOffset( m_currentSegment, t );
break;
case MIDDLE_DRAG:
m_autogradientResource->moveSegmentMiddleOffset( m_currentSegment, t );
break;
}
if ( m_drag != NO_DRAG)
emit sigChangedSegment( m_currentSegment );
repaint(false);
}
void KisGradientSliderWidget::contextMenuEvent( TQContextMenuEvent * e )
{
m_segmentMenu->setItemEnabled( REMOVE_SEGMENT, m_autogradientResource->removeSegmentPossible() );
m_segmentMenu->popup( e->globalPos());
}
void KisGradientSliderWidget::slotMenuAction( int id )
{
switch( id )
{
case SPLIT_SEGMENT:
m_autogradientResource->splitSegment( m_selectedSegment );
break;
case DUPLICATE_SEGMENT:
m_autogradientResource->duplicateSegment( m_selectedSegment );
break;
case MIRROR_SEGMENT:
m_autogradientResource->mirrorSegment( m_selectedSegment );
break;
case REMOVE_SEGMENT:
m_selectedSegment = m_autogradientResource->removeSegment( m_selectedSegment );
break;
}
emit sigSelectedSegment( m_selectedSegment );
repaint(false);
}
#include "kis_gradient_slider_widget.moc"
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