nanogui: updating window
Subject:
RE: [nanogui] updating window
From:
"Robbie" ####@####.####
Date:
8 Mar 2006 21:05:52 +0000
Message-Id: <20060308210506.2AB1A7E4B0@xprdmxin.myway.com>
If I do that, I'll have to set the background of the pixmap to a specified colour. I wasn't aware you can do that. can you?
Thanks.
> -----Original Message-----
> From: Aaron J. Grier ####@####.####
> Sent: Wednesday, March 08, 2006 1:05 PM
> To: ####@####.####
> Subject: [nanogui] Re: updating window
>
> On Wed, Mar 08, 2006 at 10:21:01AM -0500, Robbie wrote:
> > I don't think this question was asked before but I'm wondering if
> > there is anyway to update a window without causing a noticable
> > flicker. Is there? If not, is there a way to update a portion of the
> > window?
> >
> > For instance, if I want to add items to a displayed list, or icons for
> > that matter, is their a way to update just the portion affected and
> > not the entire window?
>
> double-buffer. create an offscreen pixmap, do all your updates there,
> and then perform a single blit to the visible window.
>
> since you're not performing any erase/redraw operations to the visible
> screen, the flicker is minimized.
>
> --
> Aaron J. Grier | Frye Electronics, Tigard, OR | ####@####.####
>
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