Anything new on this? I usually never use AlwaysShowEditor so I never see
this problem.

Jason Wharton
CPS - Mesa AZ
http://www.ibobjects.com

----- Original Message -----
From: "Geoff Worboys" <geoff@...>
To: <IBObjects@yahoogroups.com>
Sent: Sunday, May 06, 2001 7:17 PM
Subject: Re: [IBO] IB_Grid and DoubleBuffered


> > I have the problem, when I set IB_Grid.DoubleBuffered:=true and
> > the Grid is editable, I cannot scroll in the grid. Can anybody
> > tell me, what the problem is ?
>
> I just ran a small experiment here with IB_Grid.DoubleBuffered set to
> true...
>
> **IF** I have IB_Grid.AlwaysShowEditor = true then it appears that the
> interactions between the grid and the inplace editor cause some sort
> of continuous call to the paint routines - which resulted in high CPU
> useage and slow or unreliable response from many aspects of the entire
> application, including grid scrolling.
>
> When I set IB_Grid.AlwaysShowEditor = false then the problem went away
> and everything appeared to be normal (for the limited testing that I
> did).
>
> I could also cause the problem by dropping one of my Enh controls onto
> IB_Grid with AutoLabel turned on - which is not desireable but does
> point towards the cause of the problem. If a child control needs to
> be painted as part of painting the parent you end up with a feedback
> situation causing continuous painting.
>
>
> Curiously the problem does not happen on an editable TStringGrid, so
> it would seem that the problem results from code in the IBO grid or
> inplace editor, however...
>
> I suspect that this situation will be a difficult one to track down.
> Once found it is even possible that it would not be fixable without
> removing or restricting some other feature.
>
> So I ask you how much trouble this is causing you? If you can find
> some other way of working around the problem it would be preferrable,
> this issue can then be put on a low priority for investigation in
> IBO4.
>
>
> Geoff Worboys
> Telesis Computing
>
>
>
>
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