Subclassing QGraphicsView crash the app

[stampede]

fluxoCaixaGraphicsView::fluxoCaixaGraphicsView(QWidget *parent) :
    QGraphicsView(parent)
{
    QGraphicsScene *cenario = new QGraphicsScene(this);
}

fluxoCaixaGraphicsView::fluxoCaixaGraphicsView(QWidget *parent) :
    QGraphicsView(parent)
{
    QGraphicsScene *cenario = new QGraphicsScene(this);
}

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you just declared a local variable named "cenario", it is not the same as your "cenario" in the header file
change this to

fluxoCaixaGraphicsView::fluxoCaixaGraphicsView(QWidget *parent) :
    QGraphicsView(parent)
{
    this->cenario = new QGraphicsScene(this);
}

fluxoCaixaGraphicsView::fluxoCaixaGraphicsView(QWidget *parent) :
    QGraphicsView(parent)
{
    this->cenario = new QGraphicsScene(this);
}

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btw. you should call base class implementation of the reimplemented event handlers.

[d_stranz]

Also need to insert the Q_OBJECT macro in the fluxoCaixaGraphicsView class definition:

class fluxoCaixaGraphicsView : public QGraphicsView
{
   Q_OBJECT
 
public:
  explicit fluxoCaixaGraphicsView(QWidget *parent = 0);
  ~fluxoCaixaGraphicsView();
 
// ...
};

class fluxoCaixaGraphicsView : public QGraphicsView
{
   Q_OBJECT

public:
  explicit fluxoCaixaGraphicsView(QWidget *parent = 0);
  ~fluxoCaixaGraphicsView();

// ...
};

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