GTK FAQ Introduction

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== About this tutorial ==
 
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This is an introductory GTK+ programming tutorial. The tutorial is targeted for the C programming language.
 
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It has been created and tested on Linux. The GTK+ programming tutorial is suited for novice and intermediate programmers.
 
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== GTK+ ==
 
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[[image: Pygtk_faq_gtk.png | left]]
 
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The <b>GTK+</b> is a library for creating graphical user interfaces. The library is created in C programming language. The GTK+ library is also called the GIMP Toolkit. Originally, the library was created while developing the GIMP image manipulation program. Since then, the GTK+ became one of the most popular toolkits under Linux and BSD Unix. Today, most of the GUI software in the open source world is created in Qt or in GTK+.
 
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The GTK+ is an object oriented application programming interface. The object oriented system is created with the Glib object system, which is a base for the GTK+ library. The <b>GObject</b> also enables to create language bindings for various other programming languages. Language bindings exist for C++, Python, Perl, Java, C# and other programming languages.
 
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The GTK+ itself depends on the following libraries.
 
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* Glib
 
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* Pango
 
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* ATK
 
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* GDK
 
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* GdkPixbuf
 
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* Cairo
 
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The <b>Glib</b> is a general purpose utility library. It provides various data types, string utilities, enables error reporting, message logging, working with threads and other useful programming features.
 
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The <b>Pango</b> is a library which enables internationalization.
 
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The <b>ATK</b> is the accessibility toolkit. This toolkit provides tools which help physically challenged people work with computers. The <b>Cairo</b> is a library for creating 2D vector graphics.
 
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It has been included in GTK+ since version 2.8.
 
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Gnome and XFce desktop environments have been created using the GTK+ library. SWT and wxWidgets are well known  programming frameworks, that use GTK+. Prominent software applications that use GTK+ include Firefox or Inkscape.
 
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== Compiling GTK+ applications ==
 
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To compile GTK+ applications, we have a handy tool called <b>pkg-config</b>.
 
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The pgk-config returns metadata about installed libraries. Simply put, if we want to use a specific library, it will provide us necessary dependent libraries and include files, that we need. The pkg-config program retrieves information about packages from special metadata files.
 
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<source lang="cpp">
 
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gcc -o simple simple.c `pkg-config --libs --cflags gtk+-2.0`
 
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</source>
 
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Here we show, how we can compile a simple program. The source code consists of one file, simple.c.
 
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<source lang="cpp">
 
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$ pkg-config --cflags gtk+-2.0
 
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-I/usr/include/gtk-2.0 -I/usr/lib/gtk-2.0/include -I/usr/include/atk-1.0
 
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-I/usr/include/cairo -I/usr/include/pango-1.0 -I/usr/include/glib-2.0
 
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-I/usr/lib/glib-2.0/include -I/usr/include/freetype2 -I/usr/include/libpng12 
 
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</source>
 
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This list shows all necessary include files for GTK+ programming.
 
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<source lang="cpp">
 
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$ pkg-config --libs gtk+-2.0
 
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-lgtk-x11-2.0 -lgdk-x11-2.0 -latk-1.0 -lgdk_pixbuf-2.0 -lm -lpangocairo-1.0
 
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-lfontconfig -lXext -lXrender -lXinerama -lXi -lXrandr
 
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-lXcursor -lXfixes -lpango-1.0 -lcairo -lX11 -lgobject-2.0
 
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-lgmodule-2.0 -ldl -lglib-2.0
 
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</source>
 
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And this list shows the necessary libraries.
 
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== Sources ==
 
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* [http://www.gtk.org gtk.org]
 
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* [http://www.gtkforums.com gtkforums.com]
 
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* GTK+ / Gnome application development
 
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[[Категория:GTK+]]
 

Текущая версия на 11:27, 7 апреля 2009