g t k+ 101

Ahmed Mohamed Saeed

Sun Campus Ambas s ador. .Ahmed Sae e d@Sun c om

GTK+ 101

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Agenda

Introduction to GTK+Why GTK+?Supporting LibrariesGTK Applications StructureGTK Setup and Compilation on NetBeansDemo

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Introduction

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History

GNU Image Manipulation Program (GIMP) Peter Mattis, Spencer Kimball, and Josh

MacDonald (Class Project!!)MotifGTK

GIMP ToolKit (GTK)Object Oriented and renamed GTK+.

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What is GTK?

“GTK+ is a highly usable, feature rich toolkit for creating graphical user interfaces which boasts cross platform compatibility and an easy to use API. GTK+ it is written in C, but has bindings to many other popular programming languages” http://www.gtk.org

LGPL

Part of the GNU Project

All written in C!

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Features

Stability

Cross Platform

Language Bindings

Mobile

Accommodating

Interfaces

Foundations

http://www.gtk.org

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Why GTK?

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Did you see the features ?!

Why GTK?

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Where is GTK?

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GTK Supporting Libraries

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Glib

GLib is a general-purpose utility library, which provides many useful data types, macros, type conversions, string utilities, file utilities, a main loop abstraction, and so on. It works on many UNIX-like platforms, Windows, OS/2 and BeOS. GLib is released under the GNU Library General Public License (GNU LGPL).

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GObjectA generic type system to register arbitrary single-inherited flat and deep derived

types as well as interfaces for structured types. It takes care of creation, initialization and memory management of the assorted object and class structures, maintains parent/child relationships and deals with dynamic implementations of such types. That is, their type specific implementations are relocatable/unloadable during runtime.

A collection of fundamental type implementations, such as integers, doubles, enums and structured types, to name a few.

A sample fundamental type implementation to base object hierarchies upon - the GObject fundamental type.

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Gobject (Cont'd)

A signal system that allows very flexible user customization of virtual/overridable object methods and can serve as a powerful notification mechanism.

An extensible parameter/value system, supporting all the provided fundamental types that can be used to generically handle object properties or otherwise parameterized types.

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GDK

GIMP DrawingKitMeant to deal with X Window SystemActs as an intermediate layer between GTK+ and Xlib

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Pango and ATK

PangoTexts and fonts rendering along with Cairo

ATKAccessibility ToolKit

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GTK Applications Structure

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GTK code anatomy

InitializationMain Event LoopData types Call back functions

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Initialization and the main event loop

gtk_init() initializes the GTK environment Should be called at the beginning of the programTerminates the program if it failed to initialize the

environment

get_main()Starts the event loop that will check for the signals

connected to the widgets

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Data Types (widgets hierarchy)

http://www.gtk.org/tutorial1.2/gtk_tut-5.html

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Call back functions

SignalsWidgets need to be notified if the user clicked, typed, etc.g_signal_connect (G_OBJECT (window),

"destroy", G_CALLBACK (destroy),

NULL);

Call back functionsSimply “Functions that signal handlers call in case that

signal occurred”

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GTK Setup and Compilation on

Netbeans/Ubuntu

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Compilation Parameter

Command Line Argument`pkg-config --cflags --libs gtk+-2.0`Don't miss the “`”

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Demo 1Setup and Configuration

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Demo 2GTK+ 2.0 Tutorial Code Samples walk through

THANK YOU!

Ahmed Mohamed SaeedSun Campus AmbassadorAhmed.Saeed@Sun.Com

GTK+ 101