[Qt-interest] Painting outside QWidget::paintEvent() on MS Windows

[Srdjan Todorovic]

Hi,

2009/6/13 varun singh <mailthatmale at yahoo.co.in>:
>
> hi,
> I've started learning Qt on Microsoft Windows platform.
>
> Qt on Windows does not allow painting outside QWidget::paintEvent(). But I want to draw a pixel specified by the click of the mouse (which could have been done using QWidget::mousePressEvent(), had Qt allowed painting outside
> QWidget::paintEvent()).
>
> So, how can I do that?

Make your mouse click event cause a paint event. Then paint in your
paintEvent().

As in:

yourclass::mousePressEvent()
{
  mMessage = "Hello!";       /* mMessage is a class member of type QString */
  update();                    /* should cause a repaint */
}

yourclass::paintEvent()
{
  qWarning(mMessage.toAscii());   /* mMessage has been modified in
mousePressEvent() */
}

Something like the above?

Srdjan