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.