+class DTM_item : public QGraphicsItem
+{
+public:
+ DTM_item( HYDROGUI_ShapeBathymetry* theDTM, double d )
+ {
+ Handle(AIS_PointCloud) pc = Handle(AIS_PointCloud)::DownCast( theDTM->getAISObject() );
+ Handle(Graphic3d_ArrayOfPoints) pp = pc->GetPoints();
+ myBB = QRectF();
+ double xmin, xmax, ymin, ymax;
+ myD = d;
+
+ int n = pp->VertexNumber();
+
+ for( int i=1; i<=n; i++ )
+ {
+ gp_Pnt pnt = pp->Vertice( i );
+ Quantity_Color col = pp->VertexColor( i );
+
+ int r = col.Red()*255;
+ int g = col.Green()*255;
+ int b = col.Blue()*255;
+ int val = ( r << 16 ) + ( g << 8 ) + b;
+ double x = pnt.X();
+ double y = -pnt.Y();
+ QPointF aPnt( x, y );
+ myPoints[val].append( aPnt );
+ if( i==1 )
+ {
+ xmin = x;
+ xmax = x;
+ ymin = y;
+ ymax = y;
+ }
+ else
+ {
+ if( x>xmax )
+ xmax = x;
+ if( x<xmin )
+ xmin = x;
+ if( y>ymax )
+ ymax = y;
+ if( y<ymin )
+ ymin = y;
+ }
+ }
+
+ xmin -= 10;
+ xmax += 10;
+ ymin -= 10;
+ ymax += 10;
+ myBB.setRect( xmin, ymin, xmax-xmin, ymax-ymin );
+ }
+
+ virtual QRectF boundingRect() const
+ {
+ return myBB;
+ }
+
+ virtual void paint( QPainter* p, const QStyleOptionGraphicsItem*, QWidget* )
+ {
+ QMap<int, QList<QPointF> >::const_iterator it = myPoints.begin(), last = myPoints.end();
+ for( ; it!=last; it++ )
+ {
+ int r = ( it.key() >> 16 ) % 256;
+ int g = ( it.key() >> 8 ) % 256;
+ int b = ( it.key() >> 0 ) % 256;
+ QColor aColor( r, g, b );
+ QBrush aBrush( aColor );
+ foreach( QPointF pnt, it.value() )
+ {
+ QRectF r( pnt.x()-myD/2, pnt.y()-myD/2, myD, myD );
+ p->fillRect( r, aBrush );
+ }
+ }
+ }
+
+private:
+ QRectF myBB;
+ double myD;
+ QMap<int, QList<QPointF> > myPoints;
+};
+
+QImage draw_DTM( HYDROGUI_ShapeBathymetry* theDTM, double theD, int theWidth, int theHeight )
+{
+ QGraphicsScene aScene;
+ QGraphicsView aView;
+ DTM_item anItem( theDTM, theD );
+
+ aView.setScene( &aScene );
+ aView.setHorizontalScrollBarPolicy( Qt::ScrollBarAlwaysOff );
+ aView.setVerticalScrollBarPolicy( Qt::ScrollBarAlwaysOff );
+ aScene.addItem( &anItem );
+
+ aView.resize( theWidth, theHeight );
+ QRectF bb = anItem.boundingRect();
+ aView.fitInView( bb, Qt::KeepAspectRatio );
+ QApplication::processEvents();
+
+ QPixmap aPixmap = QPixmap::grabWidget( &aView );
+ return aPixmap.toImage();
+}
+
+