That should have been Endupdate... From: [email protected] To: [email protected] Subject: RE: [Lazarus] TMemo flicker Date: Mon, 29 Apr 2013 16:38:17 +0000
Have you tried wrapping your writes in memo1.Lines.BeginUpdate and memo1.Lines.BeginUpdate? > Date: Mon, 29 Apr 2013 18:34:07 +0200 > From: [email protected] > To: [email protected] > Subject: [Lazarus] TMemo flicker > > After having moved from TStringList over TStringGrid (which both cannot be > shifted right to make long text visible) I now use TMemo. But again I have > another issue with this component: If there are more rows than can be > displayed in the window and I change the text in the last row (Lines.Count-1) > rapidly then the whole display flickers. This OnClick event demonstrates it: > > ------------------------------------------------------- > with Memo1 do > begin > for i := 1 to 40 do > begin > if odd(i) then > Append('\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\') > else > Append('+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++'); > end; > for i := 1 to 1000 do > begin > Lines[Lines.Count-1] := '#### LAST LINE > ---'+IntToStr(i)+'-----------------------------------------------------------'; > Application.Processmessages; > end; > Memo1.Lines[Lines.Count-1] := '#### READY #### '; > end; > ------------------------------------------------------- > > When you click on the memo (so that the routine runs) and the window is small > enough then all lines are shifted down for a short time and then are shifted > up again when writing to Memo1.Lines[Lines.Count-1]. This flicker is quite > disturbing and it does not happen when there are only a few lines (which fit > in the window). Is this a known bug? > > > -- > _______________________________________________ > Lazarus mailing list > [email protected] > http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
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