OpenEuphoria

Re: Win32 page flipping

• Posted by jordah at btopenworld.com Jan 14, 2003
• 481 views

Hi Patrick,

  you can still trap that windows message using win32lib.
try something like this.

procedure TrapMsg(integer id,integer event,sequence params)
     if params[1] = WM_ERASEBKGND then
          returnValue(1)
     end if
end procedure
setHandler(<window id>,w32HEvent,routine_id("TrapMsg"))

Jordah
----- Original Message -----
From: <Patrick.Barnes at transgrid.com.au>
To: "EUforum" <EUforum at topica.com>
Sent: Tuesday, January 14, 2003 9:50 PM
Subject: RE: Win32 page flipping


>
> How do you do that? Is that a win32lib thing, or an api thing?
>
> -----Original Message-----
> From: Phil Russell [mailto:pg_russell at lineone.net]
> Sent: Tuesday, 14 January 2003 20:56
> To: EUforum
> Subject: RE: Win32 page flipping
>
>
> Hi Patrick,
>
> Another source of flicker that I have found is the automatic background
> erase that windows performs prior to WM_PAINT being issued. You can
> prevent this by returning 1 to the WM_ERASEBKGND message for the window
> you are blitting to.
>
> There is also a good article on flicker-free drawing at:
>
> http://freespace.virgin.net/james.brown7/tuts/flicker.htm
>
> HTH,
>
> Phil
>
> Patrick.Barnes at transgrid.com.au wrote:
> > I have several pages of graphics and text (wPuts'ed) that I wish to
> > switch between without flickering. How do I draw graphics and text into
> > a bitmap, so that I can blit it on to the screen in one go?
> > =======================
> > Patrick Barnes
> > Information Systems Group
> > 201 Elizabeth St, Sydney
> > Patrick.Barnes at transgrid.com.au
> > Ext: 91-3583
> > Ph:(02) 9284-3583
> > Mob: 0410 751 044
> >
> >
> > ***********************************************************************
> >
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> >
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