Repainting a QGraphicsView

Hi! Is it possible to redraw a QGraphicsView so that, in case it has the focus, it has a border around? I tried to paint it like any other widget, overriding the paintEvent method, but it seems nothing happens. Is there any other way?
Thanks for any advice!

Could you show the relevant code, please? Did you remember to open the painter on the viewport as instructed in QAbstractScrollArea::paintEvent() docs?

mmh... in the doc I found that the paintEvent method is reimplemented from QWidget::paintEvent(...). So, I did what I usually do with QWidgets.

Code:

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QPainter painter;
painter.setBrush(QBrush(Qt::gray));
painter.drawRect(QRect(0, 0, this->width(), this->height()));

---

Then, I painted the scene, ad I saw this cannot be omitted:

Code:

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QGraphicsView::paintEvent(event);

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What do you mean by "open the painter"? It seems I'm lacking something...
Thanks for your answer!

Hi Can you please let me know where you are trying to draw the border? On Scene or View?

Show us the paintEvent of your view class.
Probably you are first painting the border and then calling the base class paintEvent. This will override your painting !
You will need to first call the base class function and then draw after it.

This is what I wrote:

Code:

---

void MyView::paintEvent(QPaintEvent* event) {
   QGraphicsView::paintEvent(event);
   QPainter painter(this);
   painter.setBrush(QBrush(Qt::green));
   painter.drawRect(QRect(0, 0, this->width(), this->height()));
}

---

I can't understand. Maybe some other property I don't remember inserting is overwriting the background...

EDIT: I noticed in debug mode I get this:
warning: QPainter::begin: Paint device returned engine == 0, type: 1
warning: QPainter::setBrush: Painter not active
warning: QPainter::drawRects: Painter not active

try this :

Code:

---

void MyView::paintEvent(QPaintEvent * e)
{
	// 1. draw scene items
    QGraphicsView::paintEvent(e);
 
    // 2. draw zoom area if any
    if( m_zoomArea.width()!=0 || m_zoomArea.height()!=0 )
    {
	QPainter painter( viewport() );
        painter.save() ;
        // paint here
        painter.restore() ;
    }
}

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i.e., draw on view's viewport instead

It seems it is not redrawing correctly the scene, lines remain in the area. This is what I wrote:

Code:

---

void MyView::paintEvent(QPaintEvent* event) {
   QGraphicsView::paintEvent(event);
   QPainter painter(this->viewport());
   painter.save();
   QPen pen;
   pen.setColor(SELECTION_BORDER_AREA_QCOLOR);
   pen.setWidth(GoodiesStore::SELECTION_BORDER_AREA_WIDTH);
   painter.setPen(pen);
   painter.drawRect(QRect(0, 0, this->width(), this->height()));
   painter.restore();
}

---

When I scroll the view, it seems lines are scrolled too.
Thank you for your help!

In case anyone else need this, I didn't know how to solve this so I placed a label under the QGraphicsView and made it larger than the QGraphicsView. The result is exactly the same.