Map QTextCursor to item coordinates in QGraphicsTextItem
I am using a QGraphicsScene with multiple QGraphicsTextItems. Sometimes I need to know where a QTextCursor is in terms of item coordinates. I use the following code to get the document coordinates.
QTextCursor cursor = textCursor();
QTextBlock block = cursor.block();
int p = cursor.position();
QTextLine line = block.layout()->lineForTextPosition(p);
return QPointF(line.cursorToX(p), line.y() + line.height());
Now my problem is that the document is not exactly aligned with the QGraphicsTextItem. There are a couple of pixels of margin around the document, and I do not know how many. I could of course try to measure them, but that would only give me the values for my particular setup, and I would prefer the program to look nice on every system. Is there a way to find out the position of the document in the item?