Problem with QTextCursor selection

[jdowner]

Hi,

I'm have a situation where I need to customize the input to a QGraphicsTextItem. In particular, I need to select characters in response to an up-arrow key press. So I have created a custom QGraphicsTextItem and over-ridden the keyPressEvent,

@ class MyText : public QGraphicsTextItem
{
public:
MyText(const char* str) : QGraphicsTextItem(str)
{
}

  virtual void keyPressEvent(QKeyEvent* event)
  {   
    QTextCursor cursor = textCursor();
    if (event->key() == Qt::Key_Down)
    {   
      cursor.movePosition(QTextCursor::Left,QTextCursor::KeepAnchor);
    }   
  }  

};@

Through the testing I've done, this is selecting text (e.g. if I called removeSelectedText() the text is correctly removed). The problem is that I need to have the visual indicator of the selection and I do not see it for some reason. Am I doing something wrong, or does the selection performed by QTextCursor not get displayed graphically?

-Josh

[steno]

You have to set the cursor back onto the text edit once you move its position.

@
cursor.movePosition(QTextCursor::Left, QTextCursor::KeepAnchor);
setCursor(cursor);
@

[jdowner]

I don't think that is quite right. setCursor() defines the mouse cursor via QCursor, I am modifying text with QTextCursor, which does not inherit from QCursor so I cannot pass it to setCursor().

[steno]

ok you got me, setTextCursor is the the call. textCursor returns a copy of the QTextCursor, thats why you have to set it back into the object.

[jdowner]

Arg, of course! Thank you for the help, that seems to have fixed the problem.