\documentclass[12pt,landscape]{article} \usepackage{times,helvetic} \usepackage[latin1]{inputenc} \newcommand{\Gnome}{{\sc gnome}} \newcommand{\Gtk}{{\sc gtk+}} \begin{document} \title{The \Gnome\ Architecture} \author{ Federico Mena-Quintero\\ Red Hat Advanced Development Labs\\ federico@redhat.com } \maketitle \section*{Overview} \begin{itemize} \item What is in \Gnome? \item Architecture in detail \item \Gnome\ programming guidelines \end{itemize} \newpage \section*{What is in \Gnome? (1)} \hrulefill \begin{itemize} \item Graphical desktop environment \begin{itemize} \item \Gtk\ as the GUI library and object system \item Standard GUI \item Consistent look and feel \item Drag and drop \end{itemize} \item Application framework \begin{itemize} \item High-level widgets for applications \item Internationalization (all 20 letters of it) \item Session management \item Configuration back-end \end{itemize} \item Imaging architecture \begin{itemize} \item The \Gnome\ canvas \item Libart imaging model \item Printing system \item Font system \end{itemize} \end{itemize} \newpage \section*{What is in \Gnome? (2)} \hrulefill \begin{itemize} \item Component model \begin{itemize} \item CORBA as the backend \item Bonobo component model \item Interfaces for (lack of) Unix services \end{itemize} \item Miscellaneous backend libraries \begin{itemize} \item libxml --- XML loading/saving/parsing \item gnome-db --- Generic database API \item libglade --- GUI builder library \item gnome-mailer --- Mail API \item libgtop --- System information \item zvt --- Fast terminal emulation widget \end{itemize} \end{itemize} \newpage \section*{\Gtk\ and Glib} \hrulefill \begin{itemize} \item Glib \begin{itemize} \item Data structures \item Utility functions \item Main loop abstraction \item Portability functions \item Threads and mutexes \end{itemize} \item \Gtk\ \begin{itemize} \item Gdk wraps Xlib \item Gtk provides objects and widgets \end{itemize} \end{itemize} \newpage \section*{Glib (1)} \hrulefill \begin{itemize} \item Data structures \begin{itemize} \item Lists \item Trees \item Hash tables \item Resizable arrays \item Strings \item Relations (N-way mappings) \item Generic cache \end{itemize} \item Utility functions \begin{itemize} \item Memory allocation and memory chunks \item Assertions for correctness \item Logging and debugging \item Datasets and hooks \item Date functions \item A lexical scanner \end{itemize} \end{itemize} \newpage \section*{Glib (2)} \hrulefill \begin{itemize} \item Main loop abstraction \begin{itemize} \item Data sources for select(2)-like functionality \item I/O channel abstraction \item Timers \item Idle functions \end{itemize} \item Portability functions \begin{itemize} \item All sorts of weird string functions \item Byte-swapping functions \item Useful macros \end{itemize} \item Thread and mutex abstraction \end{itemize} \newpage \section*{Gdk} \hrulefill \begin{itemize} \item Thin wrapper over Xlib \item Makes operations less hard (or easier) \item Ported to Win32 as well \end{itemize} \newpage \section*{\Gtk} \hrulefill \begin{itemize} \item Object and type system \begin{itemize} \item Single inheritance \item Signal/slot mechanism \item Dataset mechanism \item Dynamic type registration \end{itemize} \item Widget system \begin{itemize} \item Widgets and containers \item Geometry negotiation \item Signals for notification \end{itemize} \end{itemize} \newpage \section*{\Gtk\ Widget Organization} \hrulefill \begin{itemize} \item Base GtkWidget class \begin{itemize} \item Signals for events \item Signals for map/unmap/realize/unrealize/etc. \end{itemize} \item Base GtkContainer class \begin{itemize} \item Containers are widgets \item They manage their children's geometry \item Request/allocate size negotiation policy \end{itemize} \end{itemize} \newpage \section*{\Gtk\ Drag and Drop} \hrulefill \begin{itemize} \item Xdnd and Motif protocols \item Protocol is transparent to the programmer \item Based on MIME-types \end{itemize} \newpage \section*{Imlib, GdkPixbuf, and GdkRGB} \hrulefill \begin{itemize} \item Imlib/gdk\_imlib \begin{itemize} \item Image loading with fallbacks \item Color reduction and dithering \item Image/pixmap Cache \end{itemize} \item GdkRGB \begin{itemize} \item High-quality dithering \item Part of Gdk \end{itemize} \item GdkPixbuf \begin{itemize} \item Replacement for gdk\_imlib \item Separates loading, caching, and rendering \item Uses GdkRGB \end{itemize} \end{itemize} \newpage \section*{Core \Gnome\ Libraries} \hrulefill \begin{itemize} \item Libgnome for UI-independent stuff \begin{itemize} \item Configuration file handling \item Metadata for files \item MIME-type handling \item URL and Mozilla-remote handling \item High score handling \item Desktop entry files \end{itemize} \item Libgnomeui for GUI framework \begin{itemize} \item High-level widgets \item Session management client \item The \Gnome\ canvas \end{itemize} \end{itemize} \newpage \section*{Libgnome Features} \hrulefill \begin{itemize} \item Configuration file handling \item Metadata information for files \begin{itemize} \item Icons images, positions \item Stored in a db2 database \item Per-user and systemwide metadata \end{itemize} \item MIME-types \begin{itemize} \item Basic data typing system \item Files are typified via a regex or file(1)-like match \item Actions bound to MIME-types \end{itemize} \item URLs, scores, desktop entries \end{itemize} \newpage \section*{Libgnomeui features} \hrulefill \begin{itemize} \item High-level widgets \begin{itemize} \item Toplevel application window \item Menus and toolbars \item Stock icons \item Property dialogs \item GnomeGuru (wizards) \item Multiple document interface (MDI) framework \item The \Gnome\ canvas \end{itemize} \item Session management client \begin{itemize} \item Implemented as a GtkObject \item Signals for SM requests \end{itemize} \end{itemize} \newpage \section*{Internationalization} \hrulefill \begin{itemize} \item GNU gettext for storing and translating message catalogs \item Unicode in \Gtk\ is the next step \end{itemize} \newpage \end{document}