[Lazarus] Class operators

[Jose Luis]

On Tue, 2011-05-24 at 00:35 +0100, Martin wrote:
> On 24/05/2011 00:17, Jose Luis wrote:
> > On Tue, 2011-05-24 at 00:30 +0200, Mattias Gaertner wrote:
> >> On Mon, 23 May 2011 18:06:31 -0400
> >> Jose Luis<jlvolta at fibertel.com.py>  wrote:
> >>
> >>> Hi all:
> >>>
> >>> I've tried to cast the argument 'Sender' from a call to an event
> >>> procedure, but it didn't work. The event is triggered by a TSpeedButton
> >>> push, and the code of the action call contain the sentence:
> >>>
> >>> -- if Sender is TSpeedButton then
> >>> --      buttn:=TSpeedButton(Sender);
> >>>
> >>> The code compile without raising error or warning, but at run-time
> >>> Sender is not of TSpeedButton's type, like it is in Delphi.
> >>
> ....
> > procedure TAyDForm.ButtnBHExecute(Sender: TObject);
> > var buttn:TSpeedButton;
> >      indBtn: integer;
> >      CanChange: boolean;
> > begin
> >    if (Sender is TSpeedButton) then
> 
> Set a breakpoint, and when the execution stops at it evaluate (ctrl-f7 
> or watch window) the following
> (^^PChar(Sender)^+3)^+1
> 
> It should give you the real classname
> 
> 
Hi Martin, thank you for your email;

The watch window says the value of Sender is:
0x8327251 'TAction' #148

What does this mean ?, it was a SpeedButton that triggered the action,
but I received a TAction object.

Regards,
J.L.

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