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220 lines
8.4 KiB
220 lines
8.4 KiB
/*
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* Copyright (c) 2004 Cyrille Berger <cberger@cberger.net>
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* 2004 Sven Langkamp <longamp@reallygood.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "kis_gradient_slider_widget.h"
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#include <qpainter.h>
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#include <kdebug.h>
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#include <kpopupmenu.h>
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#include <klocale.h>
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#include "kis_autogradient_resource.h"
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#define MARGIN 5
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#define HANDLE_SIZE 10
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KisGradientSliderWidget::KisGradientSliderWidget(QWidget *parent, const char* name, WFlags f )
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: QWidget( parent, name, f),
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m_currentSegment(0),
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m_selectedSegment(0),
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m_drag(0)
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{
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setMinimumHeight(30);
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m_segmentMenu = new KPopupMenu();
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m_segmentMenu->insertItem(i18n("Split Segment"), SPLIT_SEGMENT);
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m_segmentMenu->insertItem(i18n("Duplicate Segment"), DUPLICATE_SEGMENT);
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m_segmentMenu->insertItem(i18n("Mirror Segment"), MIRROR_SEGMENT);
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m_segmentMenu->insertItem(i18n("Remove Segment"), REMOVE_SEGMENT);
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connect( m_segmentMenu, SIGNAL( activated(int) ), SLOT( slotMenuAction(int) ) );
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}
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void KisGradientSliderWidget::setGradientResource( KisAutogradientResource* agr)
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{
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m_autogradientResource = agr;
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m_selectedSegment = m_autogradientResource->segmentAt(0.0);
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emit sigSelectedSegment( m_selectedSegment );
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}
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void KisGradientSliderWidget::paintEvent ( QPaintEvent* pe )
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{
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QWidget::paintEvent( pe );
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QPixmap pixmap( width(), height() );
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pixmap.fill( colorGroup().background() );
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QPainter painter( &pixmap );
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painter.setPen( Qt::black );
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painter.drawRect( MARGIN, MARGIN, width() - 2 * MARGIN, height()- 2 * MARGIN - HANDLE_SIZE );
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if(m_autogradientResource)
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{
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QImage img = m_autogradientResource->generatePreview(width()- 2* MARGIN - 2, height()- 2* MARGIN - HANDLE_SIZE - 2);
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QPixmap pixmap(img.width(), img.height());
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if (!img.isNull()) {
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m_pixmapIO.putImage(&pixmap, 0, 0, &img);
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painter.drawPixmap( MARGIN + 1, MARGIN + 1, pixmap, 0, 0, pixmap.width(), pixmap.height());
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}
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painter.fillRect( MARGIN + 1, height()- MARGIN - HANDLE_SIZE, width() - 2 * MARGIN, HANDLE_SIZE, QBrush( Qt::white ) );
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if( m_selectedSegment )
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{
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QRect selection( qRound( m_selectedSegment->startOffset()*(double)(width()- 2 * MARGIN - 2) ) + 6,
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height()- HANDLE_SIZE - MARGIN,
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qRound( ( m_selectedSegment->endOffset() - m_selectedSegment->startOffset() )*(double)(width()-12) ),
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HANDLE_SIZE );
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painter.fillRect( selection, QBrush( colorGroup().highlight() ) );
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}
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QPointArray triangle(3);
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QValueVector<double> handlePositions = m_autogradientResource->getHandlePositions();
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int position;
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painter.setBrush( QBrush( Qt::black) );
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for (uint i = 0; i < handlePositions.count(); i++)
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{
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position = qRound( handlePositions[i] * (double)( width()-12) ) + 6;
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triangle[0] = QPoint(position, height() - HANDLE_SIZE - MARGIN );
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triangle[1] = QPoint(position + (HANDLE_SIZE / 2 - 1), height() - MARGIN );
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triangle[2] = QPoint(position - (HANDLE_SIZE / 2 - 1), height() - MARGIN );
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painter.drawPolygon(triangle);
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}
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painter.setBrush( QBrush( Qt::white ) );
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QValueVector<double> middleHandlePositions = m_autogradientResource->getMiddleHandlePositions();
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for (uint i = 0; i < middleHandlePositions.count(); i++)
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{
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position = qRound( middleHandlePositions[i] * (double)(width()-12) ) + 6;
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triangle[0] = QPoint(position, height()-HANDLE_SIZE - MARGIN);
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triangle[1] = QPoint(position + (HANDLE_SIZE / 2 - 2), height() - MARGIN);
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triangle[2] = QPoint(position - (HANDLE_SIZE / 2 - 2), height() - MARGIN);
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painter.drawPolygon(triangle);
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}
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}
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bitBlt( this, 0, 0, &pixmap, 0, 0, pixmap.width(), pixmap.height(), Qt::CopyROP);
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}
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void KisGradientSliderWidget::mousePressEvent( QMouseEvent * e )
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{
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QWidget::mousePressEvent( e );
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if( ( e->y() < MARGIN || e->y() > height() - MARGIN ) || ( e->x() < MARGIN || e->x() > width() - MARGIN ) || e-> button() != LeftButton )
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return;
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double t = (double)(e->x() - MARGIN) / (double)(width() - 2 * MARGIN);
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KisGradientSegment* segment = 0;
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segment = m_autogradientResource->segmentAt(t);
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if(segment != 0)
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{
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m_currentSegment = segment;
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QRect leftHandle( qRound(m_currentSegment->startOffset() * (double)(width()-2*MARGIN-2)+ MARGIN - (HANDLE_SIZE/2 - 1 )),
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height() - HANDLE_SIZE,
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HANDLE_SIZE - 1,
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HANDLE_SIZE);
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QRect middleHandle( qRound(m_currentSegment->middleOffset() * (double)(width()-2*MARGIN-2)+ MARGIN - (HANDLE_SIZE/2 -2) ),
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height() - HANDLE_SIZE - MARGIN,
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HANDLE_SIZE - 1,
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HANDLE_SIZE);
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QRect rightHandle( qRound(m_currentSegment->endOffset() * (double)(width()-2*MARGIN-2)+ MARGIN - (HANDLE_SIZE/2 - 1 )),
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height() - HANDLE_SIZE,
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HANDLE_SIZE - 1,
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HANDLE_SIZE);
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// Change the activation order of the handles to avoid deadlocks
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if( t > 0.5 )
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{
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if( leftHandle.contains( e->pos() ) )
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m_drag = LEFT_DRAG;
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else if( middleHandle.contains( e->pos() ) )
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m_drag = MIDDLE_DRAG;
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else if( rightHandle.contains( e->pos() ) )
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m_drag = RIGHT_DRAG;
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}
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else
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{
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if( rightHandle.contains( e->pos() ) )
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m_drag = RIGHT_DRAG;
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else if( middleHandle.contains( e->pos() ) )
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m_drag = MIDDLE_DRAG;
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else if( leftHandle.contains( e->pos() ) )
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m_drag = LEFT_DRAG;
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}
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if( m_drag == NO_DRAG )
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{
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m_selectedSegment = m_currentSegment;
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emit sigSelectedSegment( m_selectedSegment );
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}
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}
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repaint(false);
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}
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void KisGradientSliderWidget::mouseReleaseEvent ( QMouseEvent * e )
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{
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QWidget::mouseReleaseEvent( e );
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m_drag = NO_DRAG;
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}
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void KisGradientSliderWidget::mouseMoveEvent( QMouseEvent * e )
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{
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QWidget::mouseMoveEvent( e );
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if( ( e->y() < MARGIN || e->y() > height() - MARGIN ) || ( e->x() < MARGIN || e->x() > width() - MARGIN ) )
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return;
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double t = (double)(e->x() - MARGIN) / (double)(width() - 2 * MARGIN);
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switch( m_drag )
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{
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case RIGHT_DRAG:
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m_autogradientResource->moveSegmentEndOffset( m_currentSegment, t );
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break;
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case LEFT_DRAG:
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m_autogradientResource->moveSegmentStartOffset( m_currentSegment, t );
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break;
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case MIDDLE_DRAG:
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m_autogradientResource->moveSegmentMiddleOffset( m_currentSegment, t );
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break;
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}
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if ( m_drag != NO_DRAG)
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emit sigChangedSegment( m_currentSegment );
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repaint(false);
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}
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void KisGradientSliderWidget::contextMenuEvent( QContextMenuEvent * e )
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{
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m_segmentMenu->setItemEnabled( REMOVE_SEGMENT, m_autogradientResource->removeSegmentPossible() );
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m_segmentMenu->popup( e->globalPos());
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}
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void KisGradientSliderWidget::slotMenuAction( int id )
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{
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switch( id )
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{
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case SPLIT_SEGMENT:
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m_autogradientResource->splitSegment( m_selectedSegment );
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break;
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case DUPLICATE_SEGMENT:
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m_autogradientResource->duplicateSegment( m_selectedSegment );
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break;
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case MIRROR_SEGMENT:
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m_autogradientResource->mirrorSegment( m_selectedSegment );
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break;
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case REMOVE_SEGMENT:
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m_selectedSegment = m_autogradientResource->removeSegment( m_selectedSegment );
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break;
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}
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emit sigSelectedSegment( m_selectedSegment );
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repaint(false);
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}
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#include "kis_gradient_slider_widget.moc"
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