New metods in components problem
lazarus / 5-Lazarus Extra Components

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luigisic · 2008-12-18 14:18

Hi,
I have tried to implement two metod in a TFieldDatalink descendant.
Because this metod are not present in TFieldDatalink I try to
implement in TFieldDatalink ancestor TDatalink.

In Public section of TDatalink I put this two metod declared:
Quotefunction ExecuteAction(Action: TBasicAction): Boolean; dynamic;
    function UpdateAction(Action: TBasicAction): Boolean; dynamic;

The result, inexplicably, a compile error in rebuild of Lazarus:
Quoteidentifier idents no member "ExecuteAction"
in descendant of TFieldDatalink.

Inexplicably, because if I try to write TFieldDatalink. in code
completition was "ExecuteAction(Action: TBasicAction)"

I try to implement same metod in class TFieldDatalink and the error
is:
QuoteThere is no method in an ancestor class to be overridden:
"TFieldDataLink.ExecuteAction(TBasicAction):Boolean;"

Yes, without a parameter "Action:", only Type of parameter
TBasicAction. :shock:

There is a mistake that i not understand. I derived classes well a lot
of time with Delphi without a problem but with Lazarus are a mistery
 :shock:

Can anyone help me, please. I discouraged to use Lazarus. It becomes
like me but I do not understand how to work it.

Thanks.

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felipemdc · 2008-12-18 19:08

Your code is not sufficient to draw any conclusions.

Post the full unit.