Hi.
I love signals/slots mechanism, and im afraid that i can overuse it(or maybe i don't understand it : P )
For example, I have 2 objects. First one inherits from QPixmapGraphicsItem , second one is QGraphicsScene. When i click on a QPixmap... object , a want to display it in QGraphicsScene. And i have 2 possible solutions. Use signal/slots mechanism, or simply call a method.

Here is my reimplementation of mousePressEvent

Qt Code: 
  1. connect(this,SIGNAL(projectNewPixmapInViewWidget(const QPixmap &)),mediator->getPToCardVDW(),SLOT(setNewPixmap(const QPixmap &))); //necessary or not ?
  2.  
  3. void cCardBase::mousePressEvent(QGraphicsSceneMouseEvent *event)
  4. {
  5. 	switch(event->button())
  6. 	{
  7. 	case Qt::LeftButton :
  8. 		//Should I emit signal here ? 
  9. 		//emit projectNewPixmapInViewWidget(this->pixmap());
  10. 		//or simply
  11. 		//mediator->getPToCardVDW()->setNewPixmap(this->pixmap());
  12. 		break;
  13.          ..............
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And a slot in QGraphicsScene based object

Qt Code: 
  1. card = new QGraphicsPixmapItem(QPixmap(tr("./graphics/misc/empty.jpg")));
  2.  
  3. void cCardViewDockWidget::setNewPixmap(const QPixmap &pixmap)
  4. {
  5. 	card->setPixmap(pixmap);
  6. }//setNewPixmap()
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And maybe some pictures








So, in that case should I emit a signal or call a method ^^'

Regards