[lazarus] FW: Dynamic Caption Change

[Cliff Baeseman]

-----Original Message-----
From: Cliff Baeseman [mailto:Cliff.Baeseman at Greenheck.com]
Sent: Thursday, April 22, 1999 8:54 AM
To: 'Shane Miller'
Subject: Dynamic Caption Change


Yep that is the same I was thinking but alot of these controls decend from
gtklabel. It is quite apparent that the
label is holding a local copy. In theory you should be able to cast a button
widget as a gtklabel and then use gtk_label_set to change the caption of a
button for instance. But I have tried just about every thing and cannot get
it to work.

Cliff

-----Original Message-----
From: Shane Miller [mailto:SMiller1 at stvgb.org]
Sent: Thursday, April 22, 1999 8:33 AM
To: Cliff.Baeseman at Greenheck.com
Subject: Re: RE: RE: RE: RE: [lazarus] Where is Classe.pp (lazarus)


PChar's point to the address of a string so if something else (another
variable) points to that address, or that address is the address of another
variable, then when you change PChar's contents, the varialbe changes too.
As long as PChar keeps the same address, you will see the change in the
variable.

Shane


>>> Cliff Baeseman <Cliff.Baeseman at Greenheck.com> 04/21 3:54 PM >>>
I was thinking about this the other night a little. GTK uses pchar or
pointer to characters. If I change the PChar does the label change
dynamically if the pchar changes? I have not tried it so I do not really
know if it will or not. This would really clean things up a bit.

Else I believe I would just create the group on the lower end much like I do
with the menu system.

Cliff

-----Original Message-----
From: Shane Miller [mailto:SMiller1 at stvgb.org]
Sent: Wednesday, April 21, 1999 3:32 PM
To: lazarus at miraclec.com
Subject: Re: RE: RE: RE: [lazarus] Where is Classe.pp (lazarus)


Problem: The RadioButton needs to access a "group" item so it knows what
group it's in when it's created.  However, the "group" property doesn't
exist in TControl or TWinControl so either I have to create one (which is
kind of a waste because nothing else uses it) or I have to actually create
the component in the TRadioButton class.

If I create the component in the TRadioGroup class, then how do I know when
to destroy it and re-construct it when , for example, the caption changes?
See if the caption changes, the radiobutton has to be recreated because gtk
doesn't give you the ability to simply change the label for a radiobutton.
You have to set the label when you create it.

So, should I move "group" all the way down, or is there a way (?virtual
function?) to notify a child class of a change caused by the parent
.............Can TControl call something in TRadioButton....

Shane


-- If I had something cute to say I forgot what it was --

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