Re: [Lazarus] Linux GUI Application define CONSOLE
Hi Leledumbo, Thanks for the explanation... I agree with this point of view... I have some code shared between 2 applications, running on Text mode and GUI... And I used CONSOLE directive to distinguish some specific code for GUI application... I can fix my code, using another compiler directive on Build modes... I was considering CONSOLE directive was equal on Linux and Windows... []s Daniel Conheça o Projeto ACBr - Automaçao Comercial Brasil DJSystem a Loja Patrocinadora do ACBr De: leledumbo leledumbo_c...@yahoo.co.id Para: lazarus@lists.lazarus.freepascal.org Enviadas: Sábado, 13 de Abril de 2013 14:35 Assunto: Re: [Lazarus] Linux GUI Application define CONSOLE I´m confusing... I always find out that the CONSOLE directive exists only for applications that does not require a GUI or in other words, applications that does not require a X server Linux applications are console, Linux doesn't have integrated GUI as a part of the system like Windows (which is why replacing X server with something else is quite easily possible). Everything (including X server) runs on top of it. It's just a matter of showing the console or not. Launching Lazarus from terminal will show output log during its execution without the need to redirect to file via --debug-log option, which is mandatory on Windows. How can I distinguish applications in Text mode (CONSOLE) from Graphics Applications (GUI) ? I don't think it's possible on Linux. Do you have any need for that? -- View this message in context: http://free-pascal-lazarus.989080.n3.nabble.com/Lazarus-Linux-GUI-Application-define-CONSOLE-tp4030537p4030548.html Sent from the Free Pascal - Lazarus mailing list archive at Nabble.com. -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] Linux GUI Application define CONSOLE
[]s Daniel Conheça o Projeto ACBr - Automaçao Comercial Brasil DJSystem a Loja Patrocinadora do ACBr De: Sven Barth pascaldra...@googlemail.com Para: lazarus@lists.lazarus.freepascal.org Enviadas: Sábado, 13 de Abril de 2013 18:49 Assunto: Re: [Lazarus] Linux GUI Application define CONSOLE On 13.04.2013 18:48, Daniel Simoes de Ameida wrote: I´m confusing... I always find out that the CONSOLE directive exists only for applications that does not require a GUI or in other words, applications that does not require a X server How can I distinguish applications in Text mode (CONSOLE) from Graphics Applications (GUI) ? You can't as leledumbo wrote already. The compiler will even warn if you use $apptype ... in the main program file on Unix systems, because it is simply not supported there. As a sidenote: checking for ifdef console or ifdef gui is problematic, because you will only be aware of a change if your units are completely recompiled. If you change the setting (e.g. by not using the IDE dialogs, but by manually adding apptype console to your program file) the compiler will only recompile the main program unit and your units won't detect a change. Regards, Sven -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] Linux GUI Application define CONSOLE
If your design is modular enough, you can use frontend-backend architecture.
Only the frontend should differ. This could be achieved by having 2 .lpi
referencing the same backend unit, with each own frontend (user interface).
Another way would be to use build mode, differing in -Fu paths. One will
refer to the console unit, while the other to the gui. This way requires you
to have both units having the same interface. To ease maintenance, you could
instead make one unit, but the implementation part is just an {$include}
directive. This time, -Fi (instead of -Fu) will decide the path where the
include file should be searched. So the layout is like:
Solution 1 (-Fu):
-backend.pas
-frontend/
--console/
---frontend.pas
--gui/
---frontend.pas
Solution 2 (-Fi):
-backend.pas
-frontend.pas
-include/
--console/
---frontend.inc
--gui/
---frontend.inc
--
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Re: [Lazarus] Linux GUI Application define CONSOLE
As a side note, in order to figure out if your program is running under X11
in Linux you can simply check for the DISPLAY environment variable:
program test;
uses
SysUtils;
begin
if GetEnvironmentVariable('DISPLAY') '' then
Writeln('Hello X11')
else
Writeln('Hello Console');
end.
Obviously the program will detect X11 even if it is running under a
terminal emulator like xterm, konsole, gnome-terminal, etc.
This way you can detect if the user tries to run the program from a pure
console (like a virtual terminal from Ctrl+Alt+F1 to F6 in most Linux
machines or from a remote connection via SSH) or from under X11 and use the
appropriate user interface at launch time.
On Sun, Apr 14, 2013 at 3:54 PM, leledumbo leledumbo_c...@yahoo.co.idwrote:
If your design is modular enough, you can use frontend-backend
architecture.
Only the frontend should differ. This could be achieved by having 2 .lpi
referencing the same backend unit, with each own frontend (user interface).
Another way would be to use build mode, differing in -Fu paths. One will
refer to the console unit, while the other to the gui. This way requires
you
to have both units having the same interface. To ease maintenance, you
could
instead make one unit, but the implementation part is just an {$include}
directive. This time, -Fi (instead of -Fu) will decide the path where the
include file should be searched. So the layout is like:
Solution 1 (-Fu):
-backend.pas
-frontend/
--console/
---frontend.pas
--gui/
---frontend.pas
Solution 2 (-Fi):
-backend.pas
-frontend.pas
-include/
--console/
---frontend.inc
--gui/
---frontend.inc
--
View this message in context:
http://free-pascal-lazarus.989080.n3.nabble.com/Lazarus-Linux-GUI-Application-define-CONSOLE-tp4030537p4030599.html
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Re: [Lazarus] Linux GUI Application define CONSOLE
Hi Mattias, Thanks for answering... I´m confusing... I always find out that the CONSOLE directive exists only for applications that does not require a GUI or in other words, applications that does not require a X server How can I distinguish applications in Text mode (CONSOLE) from Graphics Applications (GUI) ? []s Daniel Conheça o Projeto ACBr - Automaçao Comercial Brasil DJSystem a Loja Patrocinadora do ACBr De: Mattias Gaertner nc-gaert...@netcologne.de Para: lazarus@lists.lazarus.freepascal.org Enviadas: Sexta-feira, 12 de Abril de 2013 12:12 Assunto: Re: [Lazarus] Linux GUI Application define CONSOLE On Fri, 12 Apr 2013 08:01:14 -0700 (PDT) Daniel Simoes de Ameida dopidan...@yahoo.com.br wrote: Hello All, I noticed that GUI Applications on Linux (gtk2) are always signed as CONSOLE apptype by default... Yes, Linux GUI Applications have always a console. Windows GUI Applications do not have a console. Mattias -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] Linux GUI Application define CONSOLE
I´m confusing... I always find out that the CONSOLE directive exists only for applications that does not require a GUI or in other words, applications that does not require a X server Linux applications are console, Linux doesn't have integrated GUI as a part of the system like Windows (which is why replacing X server with something else is quite easily possible). Everything (including X server) runs on top of it. It's just a matter of showing the console or not. Launching Lazarus from terminal will show output log during its execution without the need to redirect to file via --debug-log option, which is mandatory on Windows. How can I distinguish applications in Text mode (CONSOLE) from Graphics Applications (GUI) ? I don't think it's possible on Linux. Do you have any need for that? -- View this message in context: http://free-pascal-lazarus.989080.n3.nabble.com/Lazarus-Linux-GUI-Application-define-CONSOLE-tp4030537p4030548.html Sent from the Free Pascal - Lazarus mailing list archive at Nabble.com. -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
[Lazarus] Linux GUI Application define CONSOLE
Hello All,
I noticed that GUI Applications on Linux (gtk2) are always signed as CONSOLE
apptype by default...
For instance, the code below generate a compiler Error on Linux, but works on
Windows
Please see these images for a better comprehension
http://imagebin.org/253733
http://imagebin.org/253734
unit Unit1;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, FileUtil, Forms, Controls, Graphics, Dialogs;
{$IFDEF CONSOLE}
ERROR // -- unit1.pas(11,3) Fatal: Syntax error, IMPLEMENTATION expected
but identifier ERROR found
{$ENDIF}
type
TForm1 = class(TForm)
private
{ private declarations }
public
{ public declarations }
end;
..
I am using Lazarus 1.1 from SVN (rev 40699M)
and FPC 2.7.1 also from SVN Free Pascal Compiler version 2.7.1 [2013/04/02]
for i386
Is there any extra configuration needed to be done on Project Options ?
[]s Daniel
Conheça o Projeto ACBr - Automaçao Comercial Brasil
DJSystem a Loja Patrocinadora do ACBr
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Re: [Lazarus] Linux GUI Application define CONSOLE
On Fri, 12 Apr 2013 08:01:14 -0700 (PDT) Daniel Simoes de Ameida dopidan...@yahoo.com.br wrote: Hello All, I noticed that GUI Applications on Linux (gtk2) are always signed as CONSOLE apptype by default... Yes, Linux GUI Applications have always a console. Windows GUI Applications do not have a console. Mattias -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
