[Lazarus] Increasingly frustrated with DbGrids

Luca Olivetti luca at wetron.es
Mon Nov 2 11:56:39 CET 2015

El 02/11/15 a les 11:12, Luca Olivetti ha escrit:
> Hello,
> I constantly stumble with the behaviour of the TDBGrid.
> I understand that it's a complex component, but every time I find an
> issue an Luiz fixes it, two more pop up (or an older one resurfaces).
> The latest episode of the saga is the futility of using a custom editor
> (with OnSelectEditor), since the grids then sets the value of the field
> using this snippet of code
>    if (FEditor<>nil) and FEditor.Visible then begin
>      Msg.LclMsg.msg:=GM_GETVALUE;
>      Msg.grid:=Self;
>      Msg.Col:=FCol;
>      Msg.Row:=FRow;
>      Msg.Value:=GetCells(FCol, FRow);
>      FEditor.Dispatch(Msg);
>      SetEditText(Msg.Col, Msg.Row, Msg.Value);
>    end;
> and this only works with the editors defined in Grids.pas, the only ones
> managing the GM_GETVALUE message.
> For other kinds of editors the result depends on how you move in the
> grid: it could either maintain the value the editor set or reset it to
> an empty string.
> I think I will file a bug once I can create a simple project, but in the
> meantime if somebody has an idea on how to solve it, it would be
> appreciated.

Bug created:


Luca Olivetti
Wetron Automation Technology http://www.wetron.es/
Tel. +34 93 5883004 (Ext.3010)  Fax +34 93 5883007

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