[Lazarus] TMemo flicker

[Jürgen Hestermann]

Am 2013-04-30 14:38, schrieb Graeme Geldenhuys:
> On 2013-04-30 10:52, Michael Van Canneyt wrote:
>> What I can say is that, given the purpose of beginupdate/endupdate,
>> in the above code, using beginupdate/endupdate is totally pointless.
>
> Indeed. BeginUpdate/EndUpdate should be outside the loop.
>
>
>
Yes, from a programmers point of view this is completely pointless if you surround a single assignment with these commands.

But it seems that internally a lot more is done which is *not* embraced with these commands. That's realy tricky because (again) you need to know about the internals to do the right thing. Of course, if you do many changes to TMemo and each would raise Begin/EndUpdate pairs internally it would slow down everything significantly I think. So if you know all this it makes sense. But this information should be written to the TMemo doku at http://lazarus-ccr.sourceforge.net/docs/lcl/stdctrls/tmemo.html .