Am 29.11.2012 03:59, schrieb luiz americo pereira camara:
As is today, if you have a reference to a IFPObserver is not possible
to use it to attach to, e.g., child objects. This occurs because AFAIK
you can't get a TObject from a interface reference.
At least for COM interfaces as and is with
In our previous episode, Sven Barth said:
As is today, if you have a reference to a IFPObserver is not possible
to use it to attach to, e.g., child objects. This occurs because AFAIK
you can't get a TObject from a interface reference.
At least for COM interfaces as and is with a class
Am 29.11.2012 10:12, schrieb Marco van de Voort:
In our previous episode, Sven Barth said:
As is today, if you have a reference to a IFPObserver is not possible
to use it to attach to, e.g., child objects. This occurs because AFAIK
you can't get a TObject from a interface reference.
At least
On Wed, 28 Nov 2012, luiz americo pereira camara wrote:
Given the considerations i did about the observer feature, here are
some simple projects that supports my concerns and therefore the
request i made to change the interface of two functions.
Test1
As is today, if you have a reference to
On Thu, 29 Nov 2012, Sven Barth wrote:
Am 29.11.2012 03:59, schrieb luiz americo pereira camara:
As is today, if you have a reference to a IFPObserver is not possible
to use it to attach to, e.g., child objects. This occurs because AFAIK
you can't get a TObject from a interface reference.
2012/11/29 michael.vancann...@wisa.be:
On Thu, 29 Nov 2012, Sven Barth wrote:
Am 29.11.2012 03:59, schrieb luiz americo pereira camara:
As is today, if you have a reference to a IFPObserver is not possible
to use it to attach to, e.g., child objects. This occurs because AFAIK
you can't
On Thu, 29 Nov 2012, luiz americo pereira camara wrote:
2012/11/29 michael.vancann...@wisa.be:
On Thu, 29 Nov 2012, Sven Barth wrote:
Am 29.11.2012 03:59, schrieb luiz americo pereira camara:
As is today, if you have a reference to a IFPObserver is not possible
to use it to attach to,
Hi Luiz,
First off, thanks for take the trouble it creating test projects.
On 2012-11-29 02:59, luiz americo pereira camara wrote:
Test1
As is today, if you have a reference to a IFPObserver is not possible
to use it to attach to, e.g., child objects. This occurs because AFAIK
you can't
On Thu, 29 Nov 2012, Graeme Geldenhuys wrote:
Hi Luiz,
First off, thanks for take the trouble it creating test projects.
On 2012-11-29 02:59, luiz americo pereira camara wrote:
Test1
As is today, if you have a reference to a IFPObserver is not possible
to use it to attach to, e.g., child
2012/11/29 michael.vancann...@wisa.be:
On Wed, 28 Nov 2012, luiz americo pereira camara wrote:
Given the considerations i did about the observer feature, here are
some simple projects that supports my concerns and therefore the
request i made to change the interface of two functions.
On 2012-11-29 12:10, michael.vancann...@wisa.be wrote:
The primary reason of existence for TFPList and TFPObjectList is speed and
minimal overhead.
OK, I understand now.
Regards,
- Graeme -
--
fpGUI Toolkit - a cross-platform GUI toolkit using Free Pascal
http://fpgui.sourceforge.net/
On Thu, 29 Nov 2012, luiz americo pereira camara wrote:
Well i have at least two situations, with code that is already
running, that the observer pattern would fit as i described.
- I implemented a Wizard Page component where i can attach a page to
any TFrame. Each page can be assigned as
Am 29.11.2012 10:44, schrieb michael.vancann...@wisa.be:
On Thu, 29 Nov 2012, Sven Barth wrote:
Am 29.11.2012 03:59, schrieb luiz americo pereira camara:
As is today, if you have a reference to a IFPObserver is not possible
to use it to attach to, e.g., child objects. This occurs because
2012/11/29 michael.vancann...@wisa.be:
On Thu, 29 Nov 2012, luiz americo pereira camara wrote:
Well i have at least two situations, with code that is already
running, that the observer pattern would fit as i described.
- I implemented a Wizard Page component where i can attach a page to
2012/11/29 Graeme Geldenhuys gra...@geldenhuys.co.uk:
Hi Luiz,
First off, thanks for take the trouble it creating test projects.
Thanks for looking at them ;-)
On 2012-11-29 02:59, luiz americo pereira camara wrote:
Test1
As is today, if you have a reference to a IFPObserver is not
On Thu, 29 Nov 2012, luiz americo pereira camara wrote:
I fail to see how the current interface forbids this ?
It does not forbids. It's just an example of the need to check if a
object implements an IFPObserver before attaching it.
You have said that there's no real life situation you
On Thu, 29 Nov 2012, luiz americo pereira camara wrote:
- I cannot define FieldsObserver as IFPObserver (the reasons why do i
prefer as it are above)
- Using FieldsObserver as TObject each time i attach/dettach from a
TFields there will be a type cast that i know before hand is not
necessary
Hello luiz,
Thursday, November 29, 2012, 12:31:41 PM, you wrote:
BTW: Graeme already pointed, that the Observer methods should be
public. Does not makes sense to protect methods that are exposed by an
interface.
When did I say that? [Though my memory has been failing me once or
twice.
2012/11/29 Graeme Geldenhuys gra...@geldenhuys.co.uk:
Hello luiz,
Thursday, November 29, 2012, 12:31:41 PM, you wrote:
BTW: Graeme already pointed, that the Observer methods should be
public. Does not makes sense to protect methods that are exposed by an
interface.
When did I say
Hello luiz,
Thursday, November 29, 2012, 9:39:36 PM, you wrote:
In the message of the example observer:
It seems Gmail searching has failed me. Thanks for fulfilling my
curiosity.
As for my comment. It was purely a suggestion (for convenience). My
personal preference is still to
2012/11/29 michael.vancann...@wisa.be:
On Thu, 29 Nov 2012, luiz americo pereira camara wrote:
Yes. I still do not see how your example shows this ?
Your wizard knows it can observe. It attaches itself to the frame.
The code frame does not need to know the observing object ?
Yes, you
2012/11/29 luiz americo pereira camara luiz...@oi.com.br:
There's a more concrete example about the duplicate typecast.
I'm developing a model manager that would be responsible to easily
create LCL forms/frames, html forms, LazReport reports etc with the
same set of data/models
Each
Given the considerations i did about the observer feature, here are
some simple projects that supports my concerns and therefore the
request i made to change the interface of two functions.
Test1
As is today, if you have a reference to a IFPObserver is not possible
to use it to attach to, e.g.,
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