Hi,

I have trouble with QGraphicsView update.

Screenshot:

image1.jpg

Code:

GraphicsViewExample.tar.bz2

I belive there is a problem with AssociItem :: Line :: paint() where I'm setting position of QGraphicsTextItem, but I have no clue how to fix it:

Qt Code: 
  1. void AssociItem::Line::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
  2. {
  3.     Q_UNUSED(option);
  4.     Q_UNUSED(widget);
  5.  
  6.     painter->setPen(pen());
  7.  
  8.     setLine(QLineF(start->mapToScene(start->boundingRect().center()),
  9.                    end->mapToScene(end->boundingRect().center())));
  10.  
  11.     QPointF endPoint;
  12.  
  13.     QPolygonF polygon = QPolygonF(end->boundingRect());
  14.     QPointF p1 = polygon.first() + end->pos();
  15.     QPointF p2;
  16.     QLineF polyLine;
  17.  
  18.     int count = polygon.count();
  19.     for(int i = 1; i < count; ++i)
  20.     {
  21.         p2 = polygon[i] + end->pos();
  22.         polyLine = QLineF(p1, p2);
  23.         QLineF::IntersectType intersectType = polyLine.intersect(line(), &endPoint);
  24.         if(intersectType == QLineF::BoundedIntersection)
  25.             break;
  26.  
  27.         p1 = p2;
  28.     }
  29.  
  30.     QGraphicsTextItem *text = static_cast<AssociItem *>(parentItem())->leftText;
  31.     text->setPos(endPoint);
  32.  
  33.     QPointF startPoint;
  34.  
  35.     polygon = QPolygonF(start->boundingRect());
  36.     p1 = polygon.first() + start->pos();
  37.  
  38.     count = polygon.count();
  39.     for(int i = 1; i < count; ++i)
  40.     {
  41.         p2 = polygon[i] + start->pos();
  42.         polyLine = QLineF(p1, p2);
  43.         QLineF::IntersectType intersectType = polyLine.intersect(line(), &startPoint);
  44.         if(intersectType == QLineF::BoundedIntersection)
  45.             break;
  46.  
  47.         p1 = p2;
  48.     }
  49.  
  50.     text = static_cast<AssociItem *>(parentItem())->rightText;
  51.     text->setPos(startPoint);
  52.  
  53.     setLine(QLineF(startPoint, endPoint));
  54.  
  55.     painter->drawLine(line());
  56. }
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Any ideas?