Octave-GTK 24/02/05 © Octave-GTK Team 24/02/05 Octave-GTK Team Octave-GTK, a language bindings...

Octave-GTK

24/02/05 © Octave-GTK Team

24/02/05 Octave-GTK Team

Octave-GTK, a language bindings project

Hemant Muthu Rams Manik {gnufied, gnumuthu, chaosglare,manickam}@users.sourceforge.net]

Step in



➔ Aims ➔ Rationale/Need➔ Project Overview➔ Development Tools➔ Octave-GTK Today➔ Octave-GTK demo➔ What can you do?➔ More Information

Agenda



Aims➢Integrate Scientific programming environment with a world-class GUI.

➢Octave+GTK = Octave-GTK

➢Octave bindings for GTK+

➢Octave GUI



Terms➢Scientific Computing➢Octave➢GTK➢GUI➢Language Bindings➢Language Interoperability➢Advantages



Rationale/Need ➢A Software EcoSystem based around Octave.

➔Integration of free tools & librariesEnviroments: Lush, SciLab, NumPythonLibraries: GD , GTK, Fann, ImageMagick, Audiofile

➔Octave-GUIOctave-GUI using Octave-GTK itself.

➔Make porting easierOctave-SWIG: for autogenerating bindings.

➢Principle of least surprise➔A Matlab clone.

➢RAD for scientific Applications➔Stop Re-Inventing the wheel.➔Reduce Reuse Recycle. GNU Way.

Why start Octave-GTK ?



Project Overview➢Octave-GTK:

➔Octave bindings to GTK✔GTK function calls from Octave.✔Function call marshalling✔Type conversion between Octave & C

➔Octave bindings to LibGlade, LibGnomeUi, GDK

✔Language bindings to LibGlade, for easier GUI programming✔LibGnome for real GNOME programs✔LibGDK for graphics & color. LibGD already ported.✔Octave-SWIG: for autogenerating bindings.

➢Octave-GUI➔Octave-GUI using Octave-GTK itself.

➢#1 Fun project!➔All code under this project is GPL'ed



➢Octave Bindings produced by Octave-GTK team.➔Octave-GTK

Octave bindings to GTK. Write GUI code from Octave.➔Octave-libGlade

Use Glade UI designer .glade files➔GD-Octave

Image processing from Octave.➔Octave-Glade

Glade UI Editor customised.➢Octave Bindings due from Octave-GTK team

➔LibGnome for real GNOME programs

➔LibGDK for graphics & color. LibGD already ported.

➔LibAtk, LibPango, LibGlib, LibGObjectCompletes the GTK bindings set.

Development Tools



Octave-GTK Today

➔Octave-GTK works today.➔Maps about 2083 functions automagically.

➔Python code generator➔Custom lexer.➔Bindings autogenerated.

➔Exports C API directly.➔Part of functions manually wrapped.

➔Glue code of 35,208 lines of code.➔gtk.cpp size 1336Kb.➔Binding library, gtk.oct 5572 Kb



Design Issues➢Callbacks are AdHoc

➢Must Write a custom Marshaller.

➢Type Mapping➢Integer to Pointer

➢Memory Management➢Reference counting problem

➢Quality of binding,GObject.➢Native to C, and Octave.

➢Lag between releases.

➢C API always newer.

➢Library Size, Speed➢Octave marshalling slow



Components➢Octave-GTK (40%)

➔Difficult to write GUI's.➔ Repetitive code➔ Suitable for autogeneration➔Tough API to learn.➔Version 0.1➔2083 functions.

➢Octave-LibGlade (80%)➔Easy to write GUI's.➔Only Event Handlers➔GUI Builder➔Easy simple API to learn.➔Version 0.1➔13 functions

➢Gd-Octave (80%)➔Read/Write Image files.➔Easy Image Processing.

➔Convolution, FFT, DFT➔Filtering, Analysis/Synthesis

➔Fairly mature.➔Concise API to learn.➔Version 0.5➔75 functions

➢Octave-Glade (5%)➔Glade Hacked➔History added?➔Customised Window creation➔Eliminate Boxed widget building.➔Auto-Code generation of octave.➔Version 0.1



Demo➢Gd-Octave (80%)

➔Read/Write Image files.➔Easy Image Processing.

➔Convolution, FFT, DFT➔Filtering, Analysis/Synthesis

➔Fairly mature.➔Concise API to learn.➔Version 0.5➔75 functions

#! /usr/bin/octave -qfunction main() gd() fp=fopen("mail.png","wb") ip=gdImageCreate(200,40); color=gdImageColorAllocate( ip,0xcc,0xdd,0xff)

%draws a square grid for i=0:20:190 gdImageLine(ip,0,i/5,200,i/5,color); gdImageLine(ip,i,0,i,40,color); end

gdImageString(ip,"Large",0,20, "[email protected]",color);

gdImagePng(ip,fp); fclose(fp); gdFree(ip);endmain()



Demo➢Octave-GTK (40%)

➔Difficult to write GUI's.➔ Repetitive code➔ Suitable for autogeneration➔Tough API to learn.➔Version 0.1➔2083 functions.

#! /usr/bin/octave -qfunction main() gtk() %load library gtk_init() %initation w=gtk_window_new(0) b=gtk_vbox_new(0,0) gtk_window_set_title(w, "Welcome to Octave-GTK"); entry=gtk_entry_new(); gtk_entry_set_text(entry,"Hello World"); okb=gtk_button_new_with_label("ok"); gtk_container_add(w,b); gtk_container_add(b,entry); gtk_container_add(b,okb); %hookup the signals g_signal_connect(okb, "clicked","gtk_main_quit"); g_signal_connect(w, "destroy","gtk_main_quit"); gtk_widget_show_all(w); gtk_main() %enter main loopend

main()



Demo [LibGlade]➢Octave-LibGlade (80%)

➔Easy to write GUI's.➔Only Event Handlers➔GUI Builder➔Easy simple API to learn.➔Version 0.1➔13 functions

function main() global xml gtk() %Load GTK Library glade() %Load LibGlade gtk_init() %Initialize GTK Type system.

xml=glade_xml_new("ohms.glade","window1",""); win1=glade_xml_get_widget(xml,"window1"); glade_xml_signal_autoconnect(xml); gtk_widget_show_all(win1); gtk_main()end

main()



Demo [LibGlade ...]➢Octave-LibGlade (80%)

➔Easy to write GUI's.➔Only Event Handlers➔GUI Builder➔Easy simple API to learn.➔Version 0.1➔13 functions

#! /usr/bin/octave -q

xml=""disp('Ohms law example with octave-libglade')

function calculate_cb() global xml disp('Hello World') i=glade_xml_get_widget(xml,"current") r=glade_xml_get_widget(xml,"resistance") v=glade_xml_get_widget(xml,"voltage")

amp=str2num(gtk_entry_get_text(i)) ohm=str2num(gtk_entry_get_text(r)) gtk_entry_set_text(v,num2str(amp*ohm)) end



Demo [Complete App]➢Design the GUI with Octave-Glade

➢Glade hacked & customised.➢Use the .glade file in your octave program.

➢Standard LibGlade useage.➢Generate GUI from this using Octave-LibGlade

➢Standard LibGlade useage.➢Write callbacks in Octave.

➢Your Job! Application Logic➢ Most of this stuff can easily be automated.

➢Done in Octave-Glade.

➢Octave-Glade (5%)➔Glade Hacked➔History added?➔Customised Window creation➔Eliminate Boxed widget building.➔Auto-Code generation of octave.➔Version 0.1



Time Line

20 July 2004

ProjectLaunched

29 July 2004

First Octave-GTKPrototype

17 Oct 2004

First Gd-Octaveautogenerated code

Gd-Octave ported toGNU Autotools.

20 Nov 2004

First Octave-GTK autogenerated

08 Feb 2005First Octave-libGlade autogenerated/released

21 Feb 2005

7 Jan 2005Glade hacked

Listed as part of Debian Project

http://aliot.debian.org/octave-gtk/GTK Project

http://www.gtk.org/bindings.htmlOctave Project: ?GNOME Project: ?



What can you do?

➢Use Octave-LibGlade/Octave-GTK➔For your science/Engineering projects➔Make applications wit Octave-GTK.➔Use Octave-GTK for your work.

➢Request features➔Ask for newer libraries for Octave-GTK.➔Ask for new type of API

➔ Ask for code/example/documents/demos.

➢Write new Applications➔Stress test Octave-GTK.➔Report errors/results.

➢ Write Documentation➔ Well how else could you get

started?➔ Support us!

➢ Write Code!➔Hack with us!

Evolution/Conclusion➢ Octave-GTK Project is Evolving. 0.1

➢ Octave-GTK will be industrial strength

➢ Version 0.2 slated for March 1st

➢ We are working!

➢ Furiously Hacking?

➢ GtkExtra, GtkWidgetFactory

➢ SWIG : Simplified Wrapper Generator

➢ Debugger: Octave Debugger

➢ Profiler: Profiler for Octave.

➢ Octave# compiler/Interpreter:

12/27/04 © ECE NIT-T, Muthiah A


Information

➢ http://octave-gtk.sourceforge.net

➢ [email protected]

➢ http://www.sf.net/projects/octave-gtk/

➢ [email protected], [email protected],

[email protected], [email protected]

➢ www.octave.org,www.gtk.org



http://octave-gtk.sourceforge.net/

mailto:[email protected]

http://www.sf.net/projects/octave-gtk/





http://www.octave.org/

http://www.gtk.org/

The Team


Hemant Kumar Chemical Engineer NIT-T C++, OOP, Octave [email protected]

Ramasamy Chemical Engineer NIT-T C++, GUI,Octave

[email protected]

Muthiah Electronics Engineer NIT-T GTK, C, [email protected]

et

Saravana Manickam Mechanical Engineer NIT-T Python, SWIG, C

[email protected]


Thanks● The GNU movement, and free software.

– Dr Richard Stallman

● GNU Octave John Eaton

● GTK Peter Mattis, Spencer Kimball, Havoc Pennington, OwenTaylor et-al

● The GNU/Linux OS Linus Torvalds et-al

● PyGTK James Henstridge

● GNOME Miguel De Icaza

● CSG Head Mr.Arun, Mr.Pradeep & Mr. Victor





Q &A

● Contents of this slides are licensed under GNU FDL

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