CGAL users discussion list

[Laurent Rineau <>]

On Sunday 30 December 2007 13:10:13 Mahmood NT wrote:
> I use a simple:
> widget->get_painter().drawLine (1,1,4,3);
>
> but there is no line in the window. What is the problem?

Maybe the points (1,1) and (4,3) are outside of the viewport. Check it with 
widget->get_painter->viewport().

Why do you want to use widget->get_painter() directly? Maybe you should use 
the native Qt drawing tools. If you want to use native drawings with 
CGAL::Qt_widget IO operators, you may want to use the following functions:
     int widget->x_pixel ( double x)
and  int widget->y_pixel ( double y).

-- 
Laurent Rineau
INRIA - Sophia Antipolis
BP 93, 2004 Route des Lucioles
06902 Sophia Antipolis Cedex FRANCE
Tel: +33 4 92 38 78 62 (Fax: +33.4.97.15.53.95)