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Re: [cgal-discuss] How to draw arcs under Qt


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  • From: Alex Tsui <>
  • To:
  • Subject: Re: [cgal-discuss] How to draw arcs under Qt
  • Date: Wed, 5 Sep 2012 21:11:06 -0700

Hi,

The class you are looking for is QPainter - it has a drawArc method that you can use:
http://qt-project.org/doc/qt-5.0/qpainter.html#drawArc

You can get access to a QPainter by implementing your own QGraphicsItem and adding it to the scene, then overriding the paint method.

Also note that CGAL has some helpful utilities for drawing common geometric objects, see here:
http://www.cgal.org/Manual/latest/doc_html/cgal_manual/GraphicsView_ref/Class_Qt--PainterOstream.html#Cross_link_anchor_2113

--Alex

On Wed, Sep 5, 2012 at 7:47 PM, Wang Hetao <> wrote:
Hello, everyone.

I'm learning and using CGAL with Qt environment. Now I'd like to draw some
arcs. Previously I draw lines and rects with QGraphicsScene class and
QGraphcsView to show the image.
But QGraphicsScene does not provide a function called "drawArc()" or
something like that to draw arcs. So I'd like to know could I draw arcs with
Qt and how?

Thx for your reply.



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