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00020 #include "kis_gradient_slider_widget.h"
00021
00022 #include <qpainter.h>
00023
00024 #include <kdebug.h>
00025 #include <kpopupmenu.h>
00026 #include <klocale.h>
00027
00028 #include "kis_autogradient_resource.h"
00029
00030 #define MARGIN 5
00031 #define HANDLE_SIZE 10
00032
00033 KisGradientSliderWidget::KisGradientSliderWidget(QWidget *parent, const char* name, WFlags f )
00034 : QWidget( parent, name, f),
00035 m_currentSegment(0),
00036 m_selectedSegment(0),
00037 m_drag(0)
00038 {
00039 setMinimumHeight(30);
00040
00041 m_segmentMenu = new KPopupMenu();
00042 m_segmentMenu->insertItem(i18n("Split Segment"), SPLIT_SEGMENT);
00043 m_segmentMenu->insertItem(i18n("Duplicate Segment"), DUPLICATE_SEGMENT);
00044 m_segmentMenu->insertItem(i18n("Mirror Segment"), MIRROR_SEGMENT);
00045 m_segmentMenu->insertItem(i18n("Remove Segment"), REMOVE_SEGMENT);
00046 connect( m_segmentMenu, SIGNAL( activated(int) ), SLOT( slotMenuAction(int) ) );
00047 }
00048
00049 void KisGradientSliderWidget::setGradientResource( KisAutogradientResource* agr)
00050 {
00051 m_autogradientResource = agr;
00052 m_selectedSegment = m_autogradientResource->segmentAt(0.0);
00053 emit sigSelectedSegment( m_selectedSegment );
00054 }
00055
00056 void KisGradientSliderWidget::paintEvent ( QPaintEvent* pe )
00057 {
00058 QWidget::paintEvent( pe );
00059 QPixmap pixmap( width(), height() );
00060 pixmap.fill( colorGroup().background() );
00061 QPainter painter( &pixmap );
00062 painter.setPen( Qt::black );
00063 painter.drawRect( MARGIN, MARGIN, width() - 2 * MARGIN, height()- 2 * MARGIN - HANDLE_SIZE );
00064 if(m_autogradientResource)
00065 {
00066 QImage img = m_autogradientResource->generatePreview(width()- 2* MARGIN - 2, height()- 2* MARGIN - HANDLE_SIZE - 2);
00067 QPixmap pixmap(img.width(), img.height());
00068 if (!img.isNull()) {
00069 m_pixmapIO.putImage(&pixmap, 0, 0, &img);
00070 painter.drawPixmap( MARGIN + 1, MARGIN + 1, pixmap, 0, 0, pixmap.width(), pixmap.height());
00071 }
00072
00073 painter.fillRect( MARGIN + 1, height()- MARGIN - HANDLE_SIZE, width() - 2 * MARGIN, HANDLE_SIZE, QBrush( Qt::white ) );
00074 if( m_selectedSegment )
00075 {
00076 QRect selection( qRound( m_selectedSegment->startOffset()*(double)(width()- 2 * MARGIN - 2) ) + 6,
00077 height()- HANDLE_SIZE - MARGIN,
00078 qRound( ( m_selectedSegment->endOffset() - m_selectedSegment->startOffset() )*(double)(width()-12) ),
00079 HANDLE_SIZE );
00080 painter.fillRect( selection, QBrush( colorGroup().highlight() ) );
00081 }
00082
00083 QPointArray triangle(3);
00084 QValueVector<double> handlePositions = m_autogradientResource->getHandlePositions();
00085 int position;
00086 painter.setBrush( QBrush( Qt::black) );
00087 for (uint i = 0; i < handlePositions.count(); i++)
00088 {
00089 position = qRound( handlePositions[i] * (double)( width()-12) ) + 6;
00090 triangle[0] = QPoint(position, height() - HANDLE_SIZE - MARGIN );
00091 triangle[1] = QPoint(position + (HANDLE_SIZE / 2 - 1), height() - MARGIN );
00092 triangle[2] = QPoint(position - (HANDLE_SIZE / 2 - 1), height() - MARGIN );
00093 painter.drawPolygon(triangle);
00094 }
00095 painter.setBrush( QBrush( Qt::white ) );
00096 QValueVector<double> middleHandlePositions = m_autogradientResource->getMiddleHandlePositions();
00097 for (uint i = 0; i < middleHandlePositions.count(); i++)
00098 {
00099 position = qRound( middleHandlePositions[i] * (double)(width()-12) ) + 6;
00100 triangle[0] = QPoint(position, height()-HANDLE_SIZE - MARGIN);
00101 triangle[1] = QPoint(position + (HANDLE_SIZE / 2 - 2), height() - MARGIN);
00102 triangle[2] = QPoint(position - (HANDLE_SIZE / 2 - 2), height() - MARGIN);
00103 painter.drawPolygon(triangle);
00104 }
00105 }
00106 bitBlt( this, 0, 0, &pixmap, 0, 0, pixmap.width(), pixmap.height(), Qt::CopyROP);
00107 }
00108
00109 void KisGradientSliderWidget::mousePressEvent( QMouseEvent * e )
00110 {
00111 QWidget::mousePressEvent( e );
00112 if( ( e->y() < MARGIN || e->y() > height() - MARGIN ) || ( e->x() < MARGIN || e->x() > width() - MARGIN ) || e-> button() != LeftButton )
00113 return;
00114 double t = (double)(e->x() - MARGIN) / (double)(width() - 2 * MARGIN);
00115 KisGradientSegment* segment = 0;
00116 segment = m_autogradientResource->segmentAt(t);
00117 if(segment != 0)
00118 {
00119 m_currentSegment = segment;
00120 QRect leftHandle( qRound(m_currentSegment->startOffset() * (double)(width()-2*MARGIN-2)+ MARGIN - (HANDLE_SIZE/2 - 1 )),
00121 height() - HANDLE_SIZE,
00122 HANDLE_SIZE - 1,
00123 HANDLE_SIZE);
00124 QRect middleHandle( qRound(m_currentSegment->middleOffset() * (double)(width()-2*MARGIN-2)+ MARGIN - (HANDLE_SIZE/2 -2) ),
00125 height() - HANDLE_SIZE - MARGIN,
00126 HANDLE_SIZE - 1,
00127 HANDLE_SIZE);
00128 QRect rightHandle( qRound(m_currentSegment->endOffset() * (double)(width()-2*MARGIN-2)+ MARGIN - (HANDLE_SIZE/2 - 1 )),
00129 height() - HANDLE_SIZE,
00130 HANDLE_SIZE - 1,
00131 HANDLE_SIZE);
00132
00133 if( t > 0.5 )
00134 {
00135 if( leftHandle.contains( e->pos() ) )
00136 m_drag = LEFT_DRAG;
00137 else if( middleHandle.contains( e->pos() ) )
00138 m_drag = MIDDLE_DRAG;
00139 else if( rightHandle.contains( e->pos() ) )
00140 m_drag = RIGHT_DRAG;
00141 }
00142 else
00143 {
00144 if( rightHandle.contains( e->pos() ) )
00145 m_drag = RIGHT_DRAG;
00146 else if( middleHandle.contains( e->pos() ) )
00147 m_drag = MIDDLE_DRAG;
00148 else if( leftHandle.contains( e->pos() ) )
00149 m_drag = LEFT_DRAG;
00150 }
00151
00152 if( m_drag == NO_DRAG )
00153 {
00154 m_selectedSegment = m_currentSegment;
00155 emit sigSelectedSegment( m_selectedSegment );
00156 }
00157 }
00158 repaint(false);
00159 }
00160
00161 void KisGradientSliderWidget::mouseReleaseEvent ( QMouseEvent * e )
00162 {
00163 QWidget::mouseReleaseEvent( e );
00164 m_drag = NO_DRAG;
00165 }
00166
00167 void KisGradientSliderWidget::mouseMoveEvent( QMouseEvent * e )
00168 {
00169 QWidget::mouseMoveEvent( e );
00170 if( ( e->y() < MARGIN || e->y() > height() - MARGIN ) || ( e->x() < MARGIN || e->x() > width() - MARGIN ) )
00171 return;
00172 double t = (double)(e->x() - MARGIN) / (double)(width() - 2 * MARGIN);
00173 switch( m_drag )
00174 {
00175 case RIGHT_DRAG:
00176 m_autogradientResource->moveSegmentEndOffset( m_currentSegment, t );
00177 break;
00178 case LEFT_DRAG:
00179 m_autogradientResource->moveSegmentStartOffset( m_currentSegment, t );
00180 break;
00181 case MIDDLE_DRAG:
00182 m_autogradientResource->moveSegmentMiddleOffset( m_currentSegment, t );
00183 break;
00184 }
00185
00186 if ( m_drag != NO_DRAG)
00187 emit sigChangedSegment( m_currentSegment );
00188
00189 repaint(false);
00190 }
00191
00192 void KisGradientSliderWidget::contextMenuEvent( QContextMenuEvent * e )
00193 {
00194 m_segmentMenu->setItemEnabled( REMOVE_SEGMENT, m_autogradientResource->removeSegmentPossible() );
00195 m_segmentMenu->popup( e->globalPos());
00196 }
00197
00198 void KisGradientSliderWidget::slotMenuAction( int id )
00199 {
00200 switch( id )
00201 {
00202 case SPLIT_SEGMENT:
00203 m_autogradientResource->splitSegment( m_selectedSegment );
00204 break;
00205 case DUPLICATE_SEGMENT:
00206 m_autogradientResource->duplicateSegment( m_selectedSegment );
00207 break;
00208 case MIRROR_SEGMENT:
00209 m_autogradientResource->mirrorSegment( m_selectedSegment );
00210 break;
00211 case REMOVE_SEGMENT:
00212 m_selectedSegment = m_autogradientResource->removeSegment( m_selectedSegment );
00213 break;
00214 }
00215 emit sigSelectedSegment( m_selectedSegment );
00216 repaint(false);
00217 }
00218
00219 #include "kis_gradient_slider_widget.moc"