CGAL users discussion list

[Mahmood NT <>]

>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).

Thanks, what is the rule of "widget->x_pixel" and "widget->y_pixel". Are they 
the same as "moveTo()"?

Is there any manual about qt functions in CGAL? I mean does CGAL use native 
QT functions or it has specific functions that are not in QT? You mean that 
"widget->get_painter()" is not a native QT function?
 
Mahmood NT




----- Original Message ----
From: Laurent Rineau 
<>
To: 

Sent: Sunday, December 30, 2007 9:02:07 PM
Subject: Re: [cgal-discuss] drawLine() does not work


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)
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