QwtPlotShapeItem* Editor::itemAt( const QPoint& pos ) const
{
const QwtPlot *plot = this->plot();
if ( plot == NULL )
return NULL;
// translate pos into the plot coordinates
double coords[ QwtPlot::axisCnt ];
coords[ QwtPlot::xBottom ] =
plot->canvasMap( QwtPlot::xBottom ).invTransform( pos.x() );
coords[ QwtPlot::xTop ] =
plot->canvasMap( QwtPlot::xTop ).invTransform( pos.x() );
coords[ QwtPlot::yLeft ] =
plot->canvasMap( QwtPlot::yLeft ).invTransform( pos.y() );
coords[ QwtPlot::yRight ] =
plot->canvasMap( QwtPlot::yRight ).invTransform( pos.y() );
QwtPlotItemList items = plot->itemList();
for ( int i = items.size() - 1; i >= 0; i-- )
{
QwtPlotItem *item = items[ i ];
if ( item->isVisible() &&
item->rtti() == QwtPlotItem::Rtti_PlotShape )
{
QwtPlotShapeItem *shapeItem = static_cast<QwtPlotShapeItem *>( item );
const QPointF p( coords[ item->xAxis() ], coords[ item->yAxis() ] );
if ( shapeItem->boundingRect().contains( p )
&& shapeItem->shape().contains( p ) )
{
return shapeItem;
}
}
}
return NULL;
}
void Plot::addShape( const QString &title,
ShapeFactory::Shape shape, const QColor &color,
const QPointF &pos, const QSizeF &size )
{
QwtPlotShapeItem *item = new QwtPlotShapeItem( title );
item->setItemAttribute( QwtPlotItem::Legend, true );
item->setLegendMode( QwtPlotShapeItem::LegendShape );
item->setLegendIconSize( QSize( 20, 20 ) );
item->setRenderHint( QwtPlotItem::RenderAntialiased, true );
item->setShape( ShapeFactory::path( shape, pos, size ) );
QColor fillColor = color;
fillColor.setAlpha( 200 );
QPen pen( color, 3 );
pen.setJoinStyle( Qt::MiterJoin );
item->setPen( pen );
item->setBrush( fillColor );
item->attach( this );
}
void Plot::populate()
{
const double d = 900.0;
const QRectF rect( 1.0, 1.0, d, d );
QPainterPath path;
//path.setFillRule( Qt::WindingFill );
path.addEllipse( rect );
const QRectF rect2 = rect.adjusted( 0.2 * d, 0.3 * d, -0.22 * d, 1.5 * d );
path.addEllipse( rect2 );
#if 0
QFont font;
font.setPointSizeF( 200 );
QPainterPath textPath;
textPath.addText( rect.center(), font, "Seppi" );
QTransform transform;
transform.translate( rect.center().x() - 600, rect.center().y() + 50 );
transform.rotate( 180.0, Qt::XAxis );
textPath = transform.map( textPath );
path.addPath( textPath );
#endif
QwtPlotShapeItem *item = new QwtPlotShapeItem( "Shape" );
item->setItemAttribute( QwtPlotItem::Legend, true );
item->setRenderHint( QwtPlotItem::RenderAntialiased, true );
#if 1
item->setRenderTolerance( 1.0 );
#endif
item->setShape( path );
item->setPen( Qt::yellow );
QColor c = Qt::darkRed;
c.setAlpha( 100 );
item->setBrush( c );
item->attach( this );
}
