dev-cpp-users Mailing List for Dev-C++

Will take some time to get my fingers to write wxWidgets ;)

/Per W

On Fri, 12 Mar 2004, Oliver Brandt wrote:

> Per Westermark schrieb:
>
>  > Another alternative is to look at the database classes in wxWindows.
>
> Right! I just forgot it. wxwindows (now wxwidgets) has a
> support for ODBC. Look here: http://www.wxwidgets.org/
>
> Regards Olli

Per Westermark schrieb:

 > Another alternative is to look at the database classes in wxWindows.

Right! I just forgot it. wxwindows (now wxwidgets) has a
support for ODBC. Look here: http://www.wxwidgets.org/

Regards Olli



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Another alternative is to look at the database classes in wxWindows.

/Per W

On Fri, 12 Mar 2004, Oliver Brandt wrote:

> Oliver Rogasch schrieb:
> > Can anyone give me an advice, how to connect to a database via odbc?
>
> try this:
> http://otl.sourceforge.net/
> http://dtemplatelib.sourceforge.net/index.htm
>
> Regards Oliver
>
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Oliver Rogasch schrieb:
> Can anyone give me an advice, how to connect to a database via odbc?

try this:
http://otl.sourceforge.net/
http://dtemplatelib.sourceforge.net/index.htm

Regards Oliver

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Can anyone give me an advice, how to connect to a database via odbc?

Greetings

Oliver

If you want to use any objects within your class that just uses static 
methods you end up having to instantiate them as singletons in a 
non-standard construction method that you then have to document.

Far simpler to design a conventional class that you then use as a 
singleton.

In article <404...@al...>, dou...@al... 
(Doug MacDonald) wrote:

> This is thread is especially interesting to me, as I'm working on a 
> project that uses Singleton for a number of its classes, and I'm not 
> sure it is warranted.  No one has addressed Michael's original 
> question: what are the tradeoffs between using Singleton and just 
> making the class (or all of its members) static?  I'd like to know 
> about others' experiences with Singleton, in case it's advisable to 
> move from Singleton-based classes to static classes in my project.
> 
> Doug

yup. it would be better if the 'reply to' address was the list.

-alvin


Daniel Glenfield wrote:
> Exactly. I enjoy seeing what other ppl have to say - I just delete those 
> with subject lines I am not interested in.
> 
> 
>> From: "Mats Lidstrom" <mat...@to...>
>> To: <dev...@li...>
>> Subject: Re: [Dev-C++] about replies
>> Date: Thu, 11 Mar 2004 00:12:20 +0100
>>
>> From: "Scott Simontis" <age...@co...>
>> > How about we all only reply to people who need to hear the results? I
>> > think this would help clear all of our inboxes.
>> > Tim Schumacher wrote:
>>
>> The purpose of a mailing list is that everybody else can gain from the
>> input. The thing that irritates me with this list is that when I click
>> "reply" it defaults to the person instead of the list.
>>
>> Just my 2 cents.
>>
>> /M
>>
>>
>>
>> -------------------------------------------------------
>> This SF.Net email is sponsored by: IBM Linux Tutorials
>> Free Linux tutorial presented by Daniel Robbins, President and CEO of
>> GenToo technologies. Learn everything from fundamentals to system
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> 
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-- 
Alvin Thompson

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I haven't looked at any Singleton<DataType> class doing any instance
pointer offset hack.

The sample code I sent for a singleton object was just a very fiew lines
of manually added code to the class in question. 100% valid C++ without
any typecasts.

/Per W

On Thu, 11 Mar 2004, Doug MacDonald wrote:

> Per and Kevin,
>
> Thanks for your advice.
>
> My ambivalence wrt the Singleton<DataType> class is in part due to the
> instance pointer offset hack, which seems to introduce a risk of
> implementation dependency: are base and derived classes always included
> in a standard order with offsets that never vary from compiler to
> compiler?.  Further, the instance pointer adjustment involves pointer
> <-> int casts that are a bit ugly, despite the elegance of Singleton as
> seen from the outside.
>
> But I take your points as to the limited desirability of fully static
> classes.
>
> (I guess declaring a top-level static _instance_ of a class is a
> different matter, and is useful, e.g., when there is no C++ main
> routine, as was the case in a former project of mine at my last employer.)
>
> --Doug
>
>
>
>

Per and Kevin,

Thanks for your advice.

My ambivalence wrt the Singleton<DataType> class is in part due to the 
instance pointer offset hack, which seems to introduce a risk of 
implementation dependency: are base and derived classes always included 
in a standard order with offsets that never vary from compiler to 
compiler?.  Further, the instance pointer adjustment involves pointer 
<-> int casts that are a bit ugly, despite the elegance of Singleton as 
seen from the outside.

But I take your points as to the limited desirability of fully static 
classes.

(I guess declaring a top-level static _instance_ of a class is a 
different matter, and is useful, e.g., when there is no C++ main 
routine, as was the case in a former project of mine at my last employer.)

--Doug

When it comes to graphic cards I think you have to count the Matrox =
Millenium G450 as an old card. You really should try another card. But =
if your computer is about 5 years old as the card you might have to =
upgrade that too since new graphic cards need a faster computer.

/M

  ----- Original Message -----=20
  From: michele=20
  To: Mats Lidstrom=20
  Cc: dev-cpp-users=20
  Sent: Thursday, March 11, 2004 10:10 AM
  Subject: Re: [Dev-C++] problem with Irrlicht


  thanks... even I  think so,
  (even if my graph. card isn't very old)
  (I have a Matrox=20
  millennium G450 16MB).

  p.s. excuse me all if only I make questions... but I'm not very =
expert...

From: "Siva Chandra" <siv...@ya...>

> > > > Tim Schumacher wrote:
> > >
> > >The purpose of a mailing list is that everybody
> > else can gain from the
> > >input. 

I think that was me actually :)

hello,

I do exactly what Dan' does.
But how do we know who all are willing to listen to
our replies if we are going to follow Scott??
And anyway, as Tim puts it, mailing list is that
everybody else can gain from the input. 

Hence from my side: We should be stripping of
un-neccassry junk from the text in the replies.

Siva Chandra

> Daniel Glenfield <sp...@ho...> wrote:
> I just delete those 
> with subject lines I am not interested in.
 
> >From: "Scott Simontis" <age...@co...>
> > > How about we all only reply to people who need
> to hear the results? .

> > > Tim Schumacher wrote:
> >
> >The purpose of a mailing list is that everybody
> else can gain from the
> >input. 


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----- Original Message -----=20
From: michele=20
To: Mats Lidstrom=20
Cc: dev-cpp-users=20
Sent: Thursday, March 11, 2004 10:10 AM
Subject: Re: [Dev-C++] problem with Irrlicht


thanks... even I  think so,
(even if my graph. card isn't very old)
(I have a Matrox=20
millennium G450 16MB).

p.s. excuse me all if only I make questions... but I'm not very =
expert...


    ----- Original Message -----=20
    From: Mats Lidstrom=20
    To: dev...@li...=20
    Sent: Tuesday, March 09, 2004 12:24 PM
    Subject: Re: [Dev-C++] problem with Irrlicht


    The "OpenGL device" is your graphics card. What model and make is =
it? Could it be that it's an older one?
    =20
    /M

      ----- Original Message -----=20
      From: michele=20
      To: dev-cpp-users=20
      Sent: Tuesday, March 09, 2004 11:18 AM
      Subject: [Dev-C++] problem with Irrlicht
      =20
      ...but even when opengl works there is some problem... Could it =
concerns with my dll or with my graphic-card-driver?  (Sometimes it =
causes bad loop.console: "OpenGL device only has one texture unit. =
Disable multitexturing.").
      =20

thanks... even I  think so,
(even if my graph. card isn't very old)
(I have a Matrox=20
millennium G450 16MB).

p.s. excuse me all if only I make questions... but I'm not very =
expert...


    ----- Original Message -----=20
    From: Mats Lidstrom=20
    To: dev...@li...=20
    Sent: Tuesday, March 09, 2004 12:24 PM
    Subject: Re: [Dev-C++] problem with Irrlicht


    The "OpenGL device" is your graphics card. What model and make is =
it? Could it be that it's an older one?
    =20
    /M

      ----- Original Message -----=20
      From: michele=20
      To: dev-cpp-users=20
      Sent: Tuesday, March 09, 2004 11:18 AM
      Subject: [Dev-C++] problem with Irrlicht
      =20
      ...but even when opengl works there is some problem... Could it =
concerns with my dll or with my graphic-card-driver?  (Sometimes it =
causes bad loop.console: "OpenGL device only has one texture unit. =
Disable multitexturing.").
      =20

Exactly. I enjoy seeing what other ppl have to say - I just delete those 
with subject lines I am not interested in.


>From: "Mats Lidstrom" <mat...@to...>
>To: <dev...@li...>
>Subject: Re: [Dev-C++] about replies
>Date: Thu, 11 Mar 2004 00:12:20 +0100
>
>From: "Scott Simontis" <age...@co...>
> > How about we all only reply to people who need to hear the results? I
> > think this would help clear all of our inboxes.
> > Tim Schumacher wrote:
>
>The purpose of a mailing list is that everybody else can gain from the
>input. The thing that irritates me with this list is that when I click
>"reply" it defaults to the person instead of the list.
>
>Just my 2 cents.
>
>/M
>
>
>
>-------------------------------------------------------
>This SF.Net email is sponsored by: IBM Linux Tutorials
>Free Linux tutorial presented by Daniel Robbins, President and CEO of
>GenToo technologies. Learn everything from fundamentals to system
>administration.http://ads.osdn.com/?ad_id=1470&alloc_id=3638&op=click
>_______________________________________________
>Dev-cpp-users mailing list
>Dev...@li...
>TO UNSUBSCRIBE: http://www23.brinkster.com/noicys/devcpp/ub.htm
>https://lists.sourceforge.net/lists/listinfo/dev-cpp-users

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