Gtk Marries Marries Ada Ada: : Gtk The GUI Technology The GUI - - PowerPoint PPT Presentation

Gtk Gtk Marries Marries Ada Ada: : The GUI Technology The GUI Technology Revolution Revolution

charlet@gnat.com

Overview Overview

History of GtkAda History of GtkAda GtkAda GtkAda Features Features Why Why Gtk Gtk Rather Than Other Toolkits? Rather Than Other Toolkits? Why Why GtkAda GtkAda rather than rather than Gtk Gtk+? +?

GtkAda GtkAda -

• History

History

• The GIMP

The GIMP

– – GNU Photoshop clone GNU Photoshop clone

• The Gtk+ library

The Gtk+ library

– – Becomes independent Becomes independent

• GtkGlade: a Gtk+ GUI builder

GtkGlade: a Gtk+ GUI builder

• Gnome: a desktop manager

Gnome: a desktop manager

• GVD: the GNU Visual Debugger

GVD: the GNU Visual Debugger

GtkAda GtkAda Features Features

• High

High-

• level binding to the

level binding to the Gtk Gtk+ library + library

– – object

• bject-
• oriented
• riented

– – type safety type safety – – small and efficient small and efficient

• Highly portable

Highly portable

– – Unixes Unixes: : Linux Linux, Solaris, … , Solaris, … – – Windows Windows NT NT

• Native

Native

GtkAda Features (2) GtkAda Features (2)

• Event handling

Event handling

• Drawing services

Drawing services

– – Lines, rectangles, … Lines, rectangles, … – – OpenGL (3D graphics) OpenGL (3D graphics)

• Style support

Style support

• Large set of widgets

Large set of widgets

GtkAda GtkAda -

• Widget set

Widget set

• Two types of widgets

Two types of widgets

– – containers and visual containers and visual objects

• bjects
• About

About 100 100 widgets are widgets are provided provided

• High

High-

• level widgets

level widgets

– – notebook, text widget, tree, spin button, table, toolbar, ... notebook, text widget, tree, spin button, table, toolbar, ...

GtkAda GtkAda -

• Screenshots

Screenshots

• Ctree

Ctree

GtkAda GtkAda -

• Screenshots (2)

Screenshots (2)

• OpenGL

OpenGL

Why Gtk+? Why Gtk+?

• Portable

Portable

• Native

Native

• Extensible

Extensible

• Open Source

Open Source

• Actively developped

Actively developped

• Thread

Thread-

• safe

safe

Why Gtk+? (2) Why Gtk+? (2)

• High level widgets

High level widgets

• Easy to use scrolling capabilities

Easy to use scrolling capabilities

• Wide range of users

Wide range of users

• Very powerful layout capabilities

Very powerful layout capabilities

– – Complete set of containers Complete set of containers

• Powerful and easy to use GUI builder

Powerful and easy to use GUI builder

• Easy to bind

Easy to bind

The GUI Builder The GUI Builder

• Multi

Multi-

• language GUI builder

language GUI builder

– – Language Language-

• independent save file

independent save file (XML). (XML). – – Code Code-

• generation specific to each

generation specific to each language. language. – – Dynamic loading of XML files Dynamic loading of XML files

Why GtkAda? Why GtkAda?

• Compile time checks

Compile time checks

• Real Object Oriented hierarchy

Real Object Oriented hierarchy

• Code readability

Code readability

• Group most popular Gtk widgets

Group most popular Gtk widgets

• Can create new types and extend

Can create new types and extend widgets widgets

• More extensive documentation

More extensive documentation

#include <gtk/gtk.h> void main (int argc, char *argv[]) { GtkWidget *window; GtkWidget *button; gtk_init (&argc, &argv); window = gtk_window_new (GTK_WINDOW_TOPLEVEL); gtk_container_set_border_width (GTK_CONTAINER (window), 10); button = gtk_button_new_with_label ("Hello World"); gtk_container_add (GTK_CONTAINER (window), button); gtk_widget_show_all (window); gtk_main (); } #include <gtk/gtk.h> void main (int argc, char *argv[]) { GtkWidget *window; GtkWidget *button; gtk_init (&argc, &argv); window = gtk_window_new (GTK_WINDOW_TOPLEVEL); gtk_container_set_border_width (GTK_CONTAINER (window), 10); button = gtk_button_new_with_label ("Hello World"); gtk_container_add (GTK_CONTAINER (window), button); gtk_widget_show_all (window); gtk_main (); } with Gtk.Main; use Gtk.Main; with Gtk.Button; use Gtk.Button; with Gtk.Window; use Gtk.Window; with Gtk.Enums; use Gtk.Enums; procedure Hello is Window : Gtk_Window; Button : Gtk_Button; begin Init; Gtk_New (Window, Window_Toplevel); Set_Border_Width (Window, 10); Gtk_New (Button, "Hello World"); Add (Window, Button); Show_All (Window); Main; end Hello; with Gtk.Main; use Gtk.Main; with Gtk.Button; use Gtk.Button; with Gtk.Window; use Gtk.Window; with Gtk.Enums; use Gtk.Enums; procedure Hello is Window : Gtk_Window; Button : Gtk_Button; begin Init; Gtk_New (Window, Window_Toplevel); Set_Border_Width (Window, 10); Gtk_New (Button, "Hello World"); Add (Window, Button); Show_All (Window); Main; end Hello;

GtkAda vs Gtk+: Example GtkAda vs Gtk+: Example

GUI GUI Builder Builder Support with GtkAda Support with GtkAda

• Support built

Support built-

• in

in

• Takes

Takes advantage of object advantage of object-

• oriented
• riented

features. features.

– – Each widget generates its own Each widget generates its own code code

• Generated sources

Generated sources

– – easy to read sources (generates new easy to read sources (generates new composite widgets) composite widgets) – – sources can be modified and sources can be modified and regenerated regenerated

GtkAda GtkAda: a complete GUI Solution : a complete GUI Solution

• Portable

Portable

• Native

Native

• Easy to use

Easy to use

• Safe

Safe

• Object Oriented

Object Oriented

• Comes with a GUI builder

Comes with a GUI builder

• Same look

Same look-

• and

and-

• feel

feel