[Qt-interest] QRadioButton setDown(true) initialise problem.

[phil prentice]

Hi
  I have an application where I need to initialise a radiobuttons state at 
startup.  If I create the button and then set down to true, when I go and 
select other radiobuttons using the mouse (buttons have same parent)the radio 
button that I originally pressed down via setDown() will remain down until I 
use the mouse to select it then all the buttons work fine(exclusively) as 
expected.

Heres a bit of code to demonstrate (although to be honest this seems to have 
even more bizaire consequences, but thats another problem).

#include <QApplication>
#include <QtGui>
int main(int argc, char *argv[])
{
  QApplication app(argc,argv);
  QWidget *top = new QWidget();
  QRadioButton *q1 = new QRadioButton("button1",top);
  QRadioButton *q2 = new QRadioButton("button2",top);
  q1->setDown(true);
  q2->setDown(true);
  q1->move(5,10);
  q2->move(5,40);
  top->show();
  return app.exec();
}

I get some strange results when I run the above which I dont understand.
When I first see the displayed widget I see both radio buttons down..which is 
wrong. However if I simply move my mouse the first button is changed to being 
up (which is what I would have expected to see when it was first 
displayed???).

Anyway I now move on to my main problem which is that when I select button1 
with the mouse button 2 remains down.  Its not until I select button2 with 
the mouse that both buttins start behaving as they should do.

I know the above code is a bit basic, but I just wanted to demonstarte my 
problem(s).
I'm using QT 4.2.1 which I appreciate is a bit out of date now, but I'm sure 
its my understanding that is at fault here.
What am I doing wrong?
Thanks for your help.