Ruby/Tk Some Basic Questions

[Zach Dennis]

Hi,

I'm playing with Ruby/Tk and I've got the Perl/Tk book and some other
text/online documentation to go along with. I am wondering if there is a
major difference between TkRoot and TkWindow and it might be. In all of the
ruby examples folks use TkRoot and assign all widgets to it, but the
TkWindow still exists. So why use one over the other?

Any input is greatly appreciated.

Thanks!

Zach

[David D'Andrea]

If you'll forgive another newbie question:

What is an abstract class?

I think of classes as abstract already, and objects as concrete. Maybe
an abstract class is one that never gets instantiated, but is always
further specified / subclassed before being used?

David

On Monday, November 10, 2003, at 08:49 PM, Hidetoshi NAGAI wrote:

> Hi,
>
> From: "Zach Dennis" <zdennis@mktec.com>

>> I am wondering if there is a
>> major difference between TkRoot and TkWindow and it might be. In all
>> of the
>> ruby examples folks use TkRoot and assign all widgets to it, but the
>> TkWindow still exists. So why use one over the other?

>
> TkWindow class is an abstract class.
> --
> Hidetoshi NAGAI
> (nagai@ai.kyutech.ac.jp)
>

[Lyle Johnson]

David D'Andrea wrote:

> If you'll forgive another newbie question:
>
> What is an abstract class?
>
> I think of classes as abstract already, and objects as concrete. Maybe
> an abstract class is one that never gets instantiated, but is always
> further specified / subclassed before being used?

Yes, your guess is correct. Abstract base classes are never themselves
instantiated, but rather provide a set of basic functionality that their
(concrete) subclasses use.

[Zach Dennis]

I think that is a good question!!

I know an abstract class in Java, and I just figured the same thing applied
here in a ruby-ish way, but I was pondering the exact same question! What is
an abstract class in Ruby?

Zach

-----Original Message-----
From: David D'Andrea [mailto:david.dandrea@sympatico.ca]
Sent: Tuesday, November 11, 2003 1:05 PM
To: ruby-talk ML
Subject: Re: Ruby/Tk Some Basic Questions


If you'll forgive another newbie question:

What is an abstract class?

I think of classes as abstract already, and objects as concrete. Maybe
an abstract class is one that never gets instantiated, but is always
further specified / subclassed before being used?

David

On Monday, November 10, 2003, at 08:49 PM, Hidetoshi NAGAI wrote:

> Hi,
>
> From: "Zach Dennis" <zdennis@mktec.com>

>> I am wondering if there is a
>> major difference between TkRoot and TkWindow and it might be. In all
>> of the
>> ruby examples folks use TkRoot and assign all widgets to it, but the
>> TkWindow still exists. So why use one over the other?

>
> TkWindow class is an abstract class.
> --
> Hidetoshi NAGAI
> (nagai@ai.kyutech.ac.jp)
>

[David D'Andrea]

I got this reply from Lyle Johnson (thanks), so just in case anyone
else was wondering:

> Yes, your guess is correct. Abstract base classes are never themselves
> instantiated, but rather provide a set of basic functionality that

their

> (concrete) subclasses use.

I suppose there's no way to enforce the non-instantiation of these
abstract classes, you just don't unless you're feeling perverse.

(me never, really!)

David

On Tuesday, November 11, 2003, at 01:44 PM, Zach Dennis wrote:

> I think that is a good question!!
>
> I know an abstract class in Java, and I just figured the same thing
> applied
> here in a ruby-ish way, but I was pondering the exact same question!
> What is
> an abstract class in Ruby?
>
> Zach
>
> -----Original Message-----
> From: David D'Andrea [mailto:david.dandrea@sympatico.ca]
> Sent: Tuesday, November 11, 2003 1:05 PM
> To: ruby-talk ML
> Subject: Re: Ruby/Tk Some Basic Questions
>
>
> If you'll forgive another newbie question:
>
> What is an abstract class?
>
> I think of classes as abstract already, and objects as concrete. Maybe
> an abstract class is one that never gets instantiated, but is always
> further specified / subclassed before being used?
>
> David
>
> On Monday, November 10, 2003, at 08:49 PM, Hidetoshi NAGAI wrote:
>

>> Hi,
>>
>> From: "Zach Dennis" <zdennis@mktec.com>

>>> I am wondering if there is a
>>> major difference between TkRoot and TkWindow and it might be. In all
>>> of the
>>> ruby examples folks use TkRoot and assign all widgets to it, but the
>>> TkWindow still exists. So why use one over the other?

>>
>> TkWindow class is an abstract class.
>> --
>> Hidetoshi NAGAI
>> (nagai@ai.kyutech.ac.jp)
>>

>
>
>
>

[Zach Dennis]

I am running

Ruby 1.8.0
Tcl/Tk 8.3
Windows 2000


Zach




----- Original Message -----
From: "Hidetoshi NAGAI" <nagai@ai.kyutech.ac.jp>
To: "ruby-talk ML" <ruby-talk@ruby-lang.org>; <zdennis@mktec.com>
Sent: Tuesday, November 11, 2003 7:51 PM

> Hi,
>
> From: "Zach Dennis" <zdennis@mktec.com>
> Subject:
> Date: Wed, 12 Nov 2003 12:28:52 +0900
> Message-ID: <001901c3a8e6$18952d80$6501a8c0@Laptop>

> > I'm having bind problems with TkRoot. I want to detect a window resize.

Here

> > is what I am attempting:

>
> I cannot reproduce your problem.
>
> # ruby 1.8.1 (2003-11-07) [i686-linux] & Tcl/Tk8.4.4
>
> Please tell me your environment (ruby version, tcl/tk version,
> platform, and so on).
> --
> Hidetoshi NAGAI (nagai@ai.kyutech.ac.jp)
>
>
>

[Hidetoshi NAGAI]

From: "Zach Dennis" <zdennis@mktec.com>
Subject: Re:
Date: Wed, 12 Nov 2003 12:58:51 +0900
Message-ID: <007301c3a8ea$49a4da20$6501a8c0@Laptop>

> I am running
> Ruby 1.8.0
> Tcl/Tk 8.3
> Windows 2000

Maybe your problem depends on "Tcl/Tk's vwait problem".
Could you try the recent version of tcltklib.c?
There are many changes between between yours and the current CVS.

# ruby-1.8.0/ext/tcltklib/tcltklib.c : 1253 lines
# Ruby-CVS/ruby/ext/tcltklib/tcltklib.c : 2396 lines
--
Hidetoshi NAGAI (nagai@ai.kyutech.ac.jp)

[Zach Dennis]

It's late I think I am thinking off base at the moment. Thanks for your help
Hidetoshi. I'm heading to bed and I'll update tomorrow on any progress.

Zach

----- Original Message -----
From: "Hidetoshi NAGAI" <nagai@ai.kyutech.ac.jp>
To: "ruby-talk ML" <ruby-talk@ruby-lang.org>; <zdennis@mktec.com>
Sent: Tuesday, November 11, 2003 8:18 PM
Subject: Re:

> From: "Zach Dennis" <zdennis@mktec.com>
> Subject: Re:
> Date: Wed, 12 Nov 2003 12:58:51 +0900
> Message-ID: <007301c3a8ea$49a4da20$6501a8c0@Laptop>

> > I am running
> > Ruby 1.8.0
> > Tcl/Tk 8.3
> > Windows 2000

>
> Maybe your problem depends on "Tcl/Tk's vwait problem".
> Could you try the recent version of tcltklib.c?
> There are many changes between between yours and the current CVS.
>
> # ruby-1.8.0/ext/tcltklib/tcltklib.c : 1253 lines
> # Ruby-CVS/ruby/ext/tcltklib/tcltklib.c : 2396 lines
> --
> Hidetoshi NAGAI (nagai@ai.kyutech.ac.jp)
>
>
>

[nobu.nokada@softhome.net]

Hi,

At Thu, 13 Nov 2003 00:10:08 +0900,
Zach Dennis wrote:

> H:\ruby-1.8.1\win32>nmake DESTDIR=temp install

You have to specify DESTDIR as absolute path.

--
Nobu Nakada

[nobu.nokada@softhome.net]

Hi,

At Thu, 13 Nov 2003 02:22:10 +0900,
Zach Dennis wrote:

> I:\source\languages\ruby\source\ruby-1.8.1\bcc32>configure
> 1 file(s) copied.
> MAKE Version 5.2 Copyright (c) 1987, 2000 Borland
> MAKE Version 5.2 Copyright (c) 1987, 2000 Borland
> Creating Makefile
>
> ** error 1 ** deleting -prologue-

Hmmm, do you set TEMP environment variable?

--
Nobu Nakada