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Usage of PROPERTY DATA in CLASS definition

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david fung
Mensajes: 257
Registrado: Mié Jul 19, 2006 8:48 am

Usage of PROPERTY DATA in CLASS definition

Mensaje por david fung »

From SelFromTabala.prg (DBFData6 app), it use "Property" and "Data"
statement as "parameters". It seems they receive value from the caller
(parent object). I tried the same idea but failed.
Attached a sample, please inform what went wrong ? Are DATA & PROPERTY
use for parameter passing ?
Can you clarify the purpose of the captioned keywords or where I can get
more information. I'll need to get the concept right.
Thanks.
David
--
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ignacio
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Mensajes: 9447
Registrado: Lun Abr 06, 2015 8:00 pm
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Usage of PROPERTY DATA in CLASS definition

Mensaje por ignacio »

David,
Sample fixed.
Regards,
--
Ignacio Ortiz de Zúñiga
http://www.xailer.com
"david fung" <davfung@yahoo.com> escribió en el mensaje
news:[email=453ef4d8@news.xailer.com...]453ef4d8@news.xailer.com...[/email]
> From SelFromTabala.prg (DBFData6 app), it use "Property" and "Data"
> statement as "parameters". It seems they receive value from the caller
> (parent object). I tried the same idea but failed.
>
> Attached a sample, please inform what went wrong ? Are DATA & PROPERTY
> use for parameter passing ?
>
> Can you clarify the purpose of the captioned keywords or where I can get
> more information. I'll need to get the concept right.
>
> Thanks.
> David
>
>


Attached files TLab.zip (2.5 KB)Â
Ignacio Ortiz de Zúñiga
[OZ Software]
https://www.ozs.es
--
[Equipo de Xailer / Xailer team]
https://www.xailer.com
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NoName
Mensajes: 531
Registrado: Vie Feb 03, 2006 7:27 pm

Usage of PROPERTY DATA in CLASS definition

Mensaje por NoName »

David,
Sample fixed.
Regards,
--
Ignacio Ortiz de Zúñiga
http://www.xailer.com
"david fung" <davfung@yahoo.com> escribió en el mensaje
news:[email=453ef4d8@news.xailer.com...]453ef4d8@news.xailer.com...[/email]
> From SelFromTabala.prg (DBFData6 app), it use "Property" and "Data"
> statement as "parameters". It seems they receive value from the caller
> (parent object). I tried the same idea but failed.
>
> Attached a sample, please inform what went wrong ? Are DATA & PROPERTY
> use for parameter passing ?
>
> Can you clarify the purpose of the captioned keywords or where I can get
> more information. I'll need to get the concept right.
>
> Thanks.
> David
>
>


Attached files TLab.zip (2.5 KB)Â
Arriba
david fung
Mensajes: 257
Registrado: Mié Jul 19, 2006 8:48 am

Usage of PROPERTY DATA in CLASS definition

Mensaje por david fung »

Thanks.
Q1. What is the different
Tform1:New() and Tform1:New( Self )
Q2. Why in my routine Parm1 & Parm2 unable to receive value from caller ?
Q3. must hb_qwith() always associate with an object, hence can only be
use inside a 'WITH OBJECT' statement ?
Regard,
David
Arriba
david fung
Mensajes: 257
Registrado: Mié Jul 19, 2006 8:48 am

Usage of PROPERTY DATA in CLASS definition

Mensaje por david fung »

Thanks.
Q1. What is the different
Tform1:New() and Tform1:New( Self )
Q2. Why in my routine Parm1 & Parm2 unable to receive value from caller ?
Q3. must hb_qwith() always associate with an object, hence can only be
use inside a 'WITH OBJECT' statement ?
Regard,
David
Arriba
Avatar de Usuario
ignacio
Site Admin
Mensajes: 9447
Registrado: Lun Abr 06, 2015 8:00 pm
Ubicación: Madrid, Spain
Contactar:
Contactar ignacio

Usage of PROPERTY DATA in CLASS definition

Mensaje por ignacio »

David,
> Q1. What is the different
>
> Tform1:New() and Tform1:New( Self )
The Self parameter, in this case the Form. Check the documentation of
TComponent:New( oParent )
> Q2. Why in my routine Parm1 & Parm2 unable to receive value from caller ?
Sure they can. But the assignment to the edit controls on event OnInitialize
is RUNNED BEFORE the assignment of the Parm? members.
> Q3. must hb_qwith() always associate with an object, hence can only be use
> inside a 'WITH OBJECT' statement ?
Yes. That is a xHarbour issue BTW.
Regards,
--
Ignacio Ortiz de Zúñiga
http://www.xailer.com
"david fung" <davfung@yahoo.com> escribió en el mensaje
news:[email=453f201b@news.xailer.com...]453f201b@news.xailer.com...[/email]
> Thanks.
>
> Q1. What is the different
>
> Tform1:New() and Tform1:New( Self )
>
> Q2. Why in my routine Parm1 & Parm2 unable to receive value from caller ?
>
> Q3. must hb_qwith() always associate with an object, hence can only be use
> inside a 'WITH OBJECT' statement ?
>
>
> Regard,
> David
>
Ignacio Ortiz de Zúñiga
[OZ Software]
https://www.ozs.es
--
[Equipo de Xailer / Xailer team]
https://www.xailer.com
Arriba
NoName
Mensajes: 531
Registrado: Vie Feb 03, 2006 7:27 pm

Usage of PROPERTY DATA in CLASS definition

Mensaje por NoName »

David,
> Q1. What is the different
>
> Tform1:New() and Tform1:New( Self )
The Self parameter, in this case the Form. Check the documentation of
TComponent:New( oParent )
> Q2. Why in my routine Parm1 & Parm2 unable to receive value from caller ?
Sure they can. But the assignment to the edit controls on event OnInitialize
is RUNNED BEFORE the assignment of the Parm? members.
> Q3. must hb_qwith() always associate with an object, hence can only be use
> inside a 'WITH OBJECT' statement ?
Yes. That is a xHarbour issue BTW.
Regards,
--
Ignacio Ortiz de Zúñiga
http://www.xailer.com
"david fung" <davfung@yahoo.com> escribió en el mensaje
news:[email=453f201b@news.xailer.com...]453f201b@news.xailer.com...[/email]
> Thanks.
>
> Q1. What is the different
>
> Tform1:New() and Tform1:New( Self )
>
> Q2. Why in my routine Parm1 & Parm2 unable to receive value from caller ?
>
> Q3. must hb_qwith() always associate with an object, hence can only be use
> inside a 'WITH OBJECT' statement ?
>
>
> Regard,
> David
>
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