Can't adjust font size of QGraphicsTextItem in QGraphicsRectItem

leinad

Hi,

I created a custom QGraphicsRectItem to allow me to handle mouse events which works fine. The issue I'm having is when I try to set the font of a QGraphicsTextItem which happens to be in my custom QGraphicsRectItem, it won't change I can't even change the text width. Below is a sample code.

CustomRect:
CustomRectItem::CustomRectItem()
{

}

//subclass QGraphicsRectItem to allow mouse events
void CustomRectItem::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
int xyCellSize = 20;

if(event->isAccepted())
{
   if(event->button() == Qt::LeftButton)
   {
       //convert scenePos to row/col values

    //   qDebug() << event->scenePos().x() <<  event->scenePos().y();
       int x = ((event->scenePos().x() - sceneStartCornerX_) / xyCellSize) + 2;  //add one to accomodate the cell for the pingee and pinger text  - 32
       int y = ((event->scenePos().y() - sceneStartCornerY_) / xyCellSize) + 2; // 217
    //   qDebug() << "row = " << y << "col = " << x;
       Q_EMIT sendRectClicked(y, x);
   }
}

}

void CustomRectItem::getViewCoordinates(int x, int y)
{
sceneStartCornerX_ = x;
sceneStartCornerY_ = y;
}

In my main to change the fonts size:
CustomRectItem *rect = new CustomRectItem;
rect->setRect(12 + (XY_CELL_SIZE * column), sceneStartCornerY_ + (XY_CELL_SIZE * rowPlacement), XY_CELL_SIZE, XY_CELL_SIZE);
QGraphicsTextItem *appIDText = new QGraphicsTextItem(rect);
appIDText->setPos(12 + (XY_CELL_SIZE * column), sceneStartCornerY_ + (XY_CELL_SIZE * rowPlacement));
QFont times("Times", 10);
appIDText->setFont(times);
appIDText->setPlainText(QString::number(appID));
scene->addItem(rect);

The text is in the rect just can't change the font size. Can someone please explain to me what I'm doing wrong?

Thanks!

SGaist

Hi,

What if you create an item with its text content rather than its size ?

leinad

I'm not sure what you mean. Can you please provide a simple example? I create a QGraphicsRectItem and add an QGraphicsTextItem to it. Is that not valid?

JoeCFD

you may need to override
void QGraphicsRectItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = nullptr)
to paint your text with different font size.

SGaist

@leinad said in Can't adjust font size of QGraphicsTextItem in QGraphicsRectItem:

QGraphicsTextItem *appIDText = new QGraphicsTextItem(rect);

Pass the text rather than a text here.

leinad

If you mean:
QGraphicsTextItem *appIDText = new QGraphicsTextItem(QString::number(appID));
appIDText->setPos(12 + (XY_CELL_SIZE * column), sceneStartCornerY_ + (XY_CELL_SIZE * rowPlacement));
QFont times("Times", 10);
times.setPointSize(2);
appIDText->setFont(times);

I get the same results :(

SGaist

Do you have the same issue if you just add a QGraphicsTextItem to your scene ?

leinad

Yes, I tried this and same results

// QGraphicsTextItem *appIDText = new QGraphicsTextItem(rect);
QGraphicsTextItem *appIDText = new QGraphicsTextItem(QString::number(appID));
appIDText->setPos(12 + (XY_CELL_SIZE * column), sceneStartCornerY_ + (XY_CELL_SIZE * rowPlacement));
QFont times("Times", 10);
times.setPointSize(2);
appIDText->setFont(times);
// appIDText->setPlainText(QString::number(appID));
scene->addItem(appIDText);

SGaist

Why are you setting the point size to two after creating your QFont object with a size of 10 ?

JoeCFD

@leinad override paint and set font to painter. It will work.