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GTK
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Free and open-source cross-platform widget toolkit for creating
graphical user interfaces
For other uses, see GTK (disambiguation).
CAPTION: GTK
GTK logo.svg
Gtk4-widget-factory demos.png
GTK version 4 (gtk4-widget-factory, a collection of examples that
demonstrate many of the GUI widgets)
Original author(s) Spencer Kimball, Peter Mattis
Developer(s) The GNOME Project, eXperimental Computing Facility (XCF)
Initial release April 14, 1998; 24 years ago (1998-04-14)
Stable release
4.6.6 / July 2, 2022; 5 months ago (2022-07-02)
Preview release
4.7.1 / July 13, 2022; 5 months ago (2022-07-13)
Repository
* gitlab.gnome.org/GNOME/gtk Edit this at Wikidata
Written in C, CSS^[1]
Operating system Linux, Unix-like, macOS, Windows
Type Widget toolkit
License LGPLv2.1+
Website gtk.org
GTK (formerly GIMP ToolKit and GTK+)^[2] is a free and open-source
cross-platform widget toolkit for creating graphical user interfaces
(GUIs).^[3] It is licensed under the terms of the GNU Lesser General
Public License, allowing both free and proprietary software to use it.
It is one of the most popular toolkits for the Wayland and X11
windowing systems.^[4]
The GTK team releases new versions on a regular basis.^[5] GTK 4 and
GTK 3 are maintained, while GTK 2 is end-of-life.^[6]
[ ]
Contents
* 1 Software architecture
+ 1.1 GTK Drawing Kit (GDK)
+ 1.2 GTK Scene Graph Kit (GSK)
+ 1.3 GtkInspector
+ 1.4 GUI designers
o 1.4.1 GtkBuilder
+ 1.5 Language bindings
o 1.5.1 Gtk#
* 2 Development
+ 2.1 Build automation
* 3 Criticism
* 4 Use
+ 4.1 Applications
+ 4.2 Desktop environments
o 4.2.1 Current
o 4.2.2 Inactive
o 4.2.3 Miscellaneous
+ 4.3 Window managers
+ 4.4 GtkSourceView
+ 4.5 GtkSpell
* 5 Example
* 6 History
+ 6.1 Linux
+ 6.2 macOS
+ 6.3 Windows
+ 6.4 OpenVMS
+ 6.5 GTK 4
+ 6.6 Releases
* 7 See also
* 8 References
* 9 Bibliography
* 10 External links
Software architecture[edit]
The GTK toolkit
Simplified software architecture of GTK. Pango, GDK, ATK, GIO, Cairo
and GLib
GDK contains back-ends to X11, Wayland, Broadway (HTTP), Quartz, and
GDI and relies on Cairo for the rendering. Its new SceneGraph is
work-in-progress.
The GTK library contains a set of graphical control elements (widgets);
version 3.22.16 contains 186 active and 36 deprecated widgets.^[7] GTK
is an object-oriented widget toolkit written in the programming
language C; it uses GObject, that is the GLib object system, for the
object orientation. While GTK is mainly for windowing systems based on
X11 and Wayland, it works on other platforms, including Microsoft
Windows (interfaced with the Windows API), and macOS (interfaced with
Quartz). There is also an HTML5 back-end named Broadway.^[8]^[9]
GTK can be configured to change the look of the widgets drawn; this is
done using different display engines. Several display engines exist
which try to emulate the look of the native widgets on the platform in
use.
Starting with version 2.8, released in 2005, GTK began the transition
to using Cairo to render most of its graphical control elements
widgets.^[10] Since GTK version 3.0, all rendering is done using
Cairo.^[11]
On 26 January 2018 at DevConf.cz, Matthias Clasen gave an overview of
the current state of GTK 4 development, including a high-level
explanation of how rendering and input worked in GTK 3, what changes
are being made in GTK 4 (>3.90), and why.^[12] On 6 February 2019 it
was announced that GTK 4 will drop the "+" from the project's name.^[2]
GTK Drawing Kit (GDK)[edit]
Main article: GDK
GDK acts as a wrapper around the low-level functions provided by the
underlying windowing and graphics systems.
GDK is found in the /gdk directory.
GTK Scene Graph Kit (GSK)[edit]
Main article: GTK Scene Graph Kit
GSK is the rendering and scene graph API for GTK. GSK lies between the
graphical control elements (widgets) and the rendering. GSK was finally
merged into GTK version 3.90 released March 2017.
GSK is found in the /gsk directory.
GtkInspector[edit]
GtkInspector was introduced with version 3.14.^[13]^[14] GtkInspector
can only be invoked after installing the development package
libgtk-3-dev/gtk+-devel^[permanent dead link].
GUI designers[edit]
There are several GUI designers for GTK. The following projects are
active as of July 2011:
* Glade, supports GtkBuilder, which is a GTK built-in GUI description
format.
* Gazpacho, GUI builder for the GTK toolkit written in Python^[15]
* Crow Designer, relies on its own GuiXml format and GuiLoader
library.^[16]
* Stetic, part of MonoDevelop, oriented toward Gtk#.
* Gambas since version 2.0 atop BASIC
* Xojo on Linux
* Lazarus on Linux defaults to interfacing with GTK 2
GtkBuilder[edit]
GtkBuilder allows user interfaces to be designed without writing code.
The interface is described in an Extensible Markup Language (XML) file,
which is then loaded at runtime and the objects created automatically.
The Glade Interface Designer allows creation of the user interface in a
what you see is what you get (WYSIWYG) manner. The description of the
user interface is independent from the programming language being used.
Language bindings[edit]
Main article: List of language bindings for GTK
Language bindings are available for using GTK from languages other than
C, including C++, Genie, JavaScript, Perl, Python, Vala, and
others.^[17]
GtkSharp, not to be confused with Gtk#, supports GTK 3.
Gtk#[edit]
CAPTION: Gtk#
Gtk Sharp Logo.png
Developer(s) Xamarin
Initial release March 12, 2004; 18 years ago (2004-03-12)
Stable release
2.12.41^[18] / September 22, 2016; 6 years ago (2016-09-22)
Preview release
2.99.3 (for GTK3)^[18] / June 6, 2014; 8 years ago (2014-06-06)
Repository
* gitlab.gnome.org/GNOME/gtk Edit this at Wikidata
Written in C#, XML, Perl, C
Operating system Windows, macOS, Linux
Type Widget toolkit
License GNU Lesser General Public License
Website mono-project.com/GtkSharp
Gtk# is a set of .NET Framework bindings for the GTK graphical user
interface (GUI) toolkit and assorted GNOME libraries. The library
facilitates building graphical GNOME applications using Mono or any
other compliant Common Language Runtime (CLR). Gtk# is an event-driven
system like any other modern windowing library where every widget
allows associating handler methods, which get called when certain
events occur.
Applications built using Gtk# will run on many platforms including
Linux, Windows and macOS. The Mono packages for Windows include GTK,
Gtk# and a native theme to make applications look like native Windows
applications. Starting with Mono 1.9, running Gtk# applications on
macOS no longer requires running an X11 server.^[19]
Glade Interface Designer can be used with the Glade# bindings to easily
design GUI applications. A GUI designer named Stetic is integrated with
the MonoDevelop integrated development environment (IDE).
In addition to support the standard GTK/GNOME stack of development
tools, the
gtk-dotnet.dll assembly provides a bridge to consume functionality
available on the .NET stack. At this point this includes the
functionality to use System.Drawing to draw on a widget.
As of September 2020^[update], Gtk# support for Gtk3 remains in the
preview phase and forked projects, such as GtkSharp, have been founded
to provide full Gtk3 support for C# and other CLI languages. The lack
of a released version of Gtk# with support for Gtk3 was cited as a
reason to remove the Banshee media player in Ubuntu 12.04.^[20]
Development[edit]
GTK is mainly developed by The GNOME Project, which also develops the
GNOME Development Platform and the GNOME Desktop Environment.^[21]
GTK development is loosely managed. Discussion chiefly occurs on
several public mailing lists.^[22] GNOME developers and users gather at
an annual GNOME Users And Developers European Conference GUADEC meeting
to discuss GNOME's current state and future direction.^[23] GNOME
incorporates standards and programs from freedesktop.org to better
interoperate with other desktops.
GTK is mainly written in C.^[24] Many language bindings are available.
On 1 September 2016 a post on the GTK development blog denoted, among
other things, the future numbering scheme of GTK.^[25] GTK version
3.22, released in Autumn 2016, was planned to be the last 3.x release,
although version 3.24 followed in Fall 2018 with the delay of GTK
4.^[26] The development of GTK 4 used version names 3.90, 3.92, etc.
until the first GTK 4.0 stable release was launched in December
2020.^[27] Despite the first stable GTK 4 release, some applications
using GTK still rely on GTK 2. For example, as of January 2022, GIMP is
still being ported to GTK 3.^[28]
Build automation[edit]
GTK (and GNOME, GLib, etc.) formerly utilized the GNU Build System
(named Autotools) as the build automation system of choice.
Since 14 Aug 2017, the master branch of GTK has been built with Meson,
and the Autotools build system files have been dropped.^[29]
Criticism[edit]
The most common criticism of GTK is the lack of backward-compatibility
in major updates, most notably in the application programming interface
(API)^[30] and theming.^[31]
The compatibility breaks between minor releases during the GTK 3.x
development cycle was explained by Benjamin Otte as due to strong
pressures to innovate, such as providing the features modern users
expect and supporting the increasingly influential Wayland display
server protocol. With the release of GTK 4, the pressure from the need
to innovate will have been released and the balance between stability
and innovation will tip toward stability.^[32] Similarly, recent
changes to theming are specifically intended to improve and stabilise
that part of the API, meaning some investment now should be rewarded
later.
* Dirk Hohndel, codeveloper of Subsurface and member of Intel's
Open-Source Technology Center, criticized the GTK developers for
being abrasive and ignoring most community requests.^[33]
* Hong Jen Yee, developer of LXDE (the GTK version of which was
dropped and all efforts focused on the Qt port), expressed disdain
for version 3 of the GTK toolkit's radical API changes and
increased memory usage, and ported PCMan File Manager (PCManFM) to
Qt. PCManFM is being developed with a GTK and with a Qt backend at
the same time.^[34]
* The Audacious music player moved to Qt in version 3.6.^[35] The
reasons stated by the developers for this include a transition to
client-side window decorations, which they claim cause the
application to look "GNOME-y and out of place."^[36]
* Wireshark has switched to Qt due to not having a good experience
with GTK's cross-platform support.^[37]
Use[edit]
The GTK support for Wayland, co-requisites applications to be adapted
to Wayland also
Screenshot of GIMP 2.8 - GTK is responsible for managing the interface
components of the program, including the menus, buttons, and input
fields.
Applications[edit]
Main pages: List of GTK applications and Category:Software that uses
GTK
Some notable applications that use GTK as a widget toolkit include:
* Ardour, a digital audio workstation (DAW)
* Deluge, a Bit Torrent client
* Foliate, an ebook reader
* GIMP, a raster graphics editor
* GNOME Builder, an integrated development environment (IDE)
* GNOME Core Applications, a collection of applications as a standard
bundle of the GNOME desktop environment
* GNOME Evolution, a personal information manager
* HandBrake, digital video transcoder
* Inkscape, a vector graphics editor
* LibreOffice, an office suite
* Lutris, a game manager
* Mozilla Firefox, a web browser
* Mozilla Thunderbird, a personal information manager
* Pitivi, a video editor
* PCSX-Reloaded, a video game console emulator
* Remmina, a remote desktop client
* Transmission, a Bit Torrent client
Desktop environments[edit]
Main page: Desktop environments based on GTK
Several desktop environments utilize GTK as the widget toolkit.
Current[edit]
* GNOME, based on GTK, meaning that programs native to GNOME use GTK
* Budgie, built from scratch for the SolusOS successor, Solus
Operating System
* Cinnamon, a fork of GNOME 3 which uses GTK version 3
* MATE, a fork of GNOME 2 which uses GTK 3 since version 1.18
* Xfce, based on GTK 3 since version 4.14
* Pantheon uses GTK 3 exclusively, being developed by elementary OS
* Sugar, a desktop environment for youth primary education, which
uses GTK, especially PyGTK
* Phosh, a mobile UI designed for PureOS
* LXDE (Lightweight X11 Desktop Environment) is based on GTK 2
* Unity, the former default desktop environment of Ubuntu
Inactive[edit]
* Access Linux Platform (successor of the Palm OS PDA platform)
* Consort, the GNOME 3.4 Fallback Mode - fork from SolusOS
* GPE, the GPE Palmtop Environment
* ROX Desktop, a lightweight desktop, with features from the GUI of
RISC OS
Miscellaneous[edit]
GTK programs can be run on desktop environments based on X11 and
Wayland, or window managers even those not made with GTK, provided the
needed libraries are installed; this includes macOS if X11.app is
installed. GTK can be also run on Microsoft Windows, where it is used
by some popular cross-platform applications like Pidgin and GIMP.
wxWidgets, a cross-platform GUI tool-kit, uses GTK on Linux by
default.^[38] Other ports include DirectFB (used by the Debian
installer, for example) and ncurses.^[39]
Window managers[edit]
The following window managers use GTK:
* Aewm
* AfterStep
* Amaterus
* Consortium
* IceWM
* Marco
* Metacity
* Muffin
* Mutter
* Sawfish
* Wmg
* Xfwm
GtkSourceView[edit]
Main article: GtkSourceView
For syntax highlighting there is GtkSourceView, "source code editing
widget". GtkSourceView is maintained by GNOME separately from GTK as a
library: gtksourceview. There are plans to rename to gsv.
GtkSpell[edit]
GtkSpell is a library separate from GTK. GtkSpell depends on GTK and
Enchant. Enchant is a wrapper for ispell, hunspell, etc., the actual
spell checker engine/software. GtkSpell uses GTK's GtkTextView widget,
to highlight misspelled words and offer replacement.
* gtkspell.sourceforge.net
Example[edit]
Documentation is available here:
* developer.gnome.org/gtk4/stable/
The following code presents a graphical GTK hello-world program in the
C programming language. This program has a window with the title
"Hello, world!" and a label with similar text.
// helloworld.c
#include <gtk/gtk.h>
/* Callback that will be called when the application is activated */
static void
activate_callback(GApplication *app, gpointer user_data)
{
GtkWidget *window;
GtkWidget *label;
/* Create the main, top level window */
window = gtk_window_new();
/* Give it the title */
gtk_window_set_title(GTK_WINDOW(window), "Hello, world!");
/* Set the window's default size */
gtk_window_set_default_size(GTK_WINDOW(window), 200, 100);
/* Assign the variable "label" to a new GTK label,
* with the text "Hello, world!" */
label = gtk_label_new("Hello, world!");
/* Plot the label onto the main window */
gtk_window_set_child(GTK_WINDOW(window), label);
/* Make the application aware of the window.
* The application process will continue to run until all
* windows are closed */
gtk_application_add_window(GTK_APPLICATION(app), GTK_WINDOW(window));
/* Make sure that everything, window and label, are visible */
gtk_widget_show(window);
}
int main (int argc, char *argv[])
{
/* Create our test application */
GtkApplication *application = gtk_application_new("org.wikipedia.gtktest", 0
);
/* Connect our handler to the "activate" callback, which will be called
* when the application is activated by the user, e.g. on first start */
g_signal_connect(application, "activate", G_CALLBACK(activate_callback), NUL
L);
/* Run the application and return its status */
return g_application_run(G_APPLICATION(application), argc, argv);
}
Needs installing the libraries first in Debian or derivatives: $ sudo
apt-get install libgtk-4-dev
Using pkg-config in a Unix shell, this code can be compiled with the
following command: $ cc -Wall $(pkg-config --cflags --libs gtk4)
helloworld.c -o helloworld
Invoke the program: $ ./helloworld
History[edit]
Linux[edit]
GTK was originally designed and used in the GNU Image Manipulation
Program (GIMP) as a replacement of the Motif toolkit; at some point
Peter Mattis became disenchanted with Motif and began to write his own
GUI toolkit named the GIMP toolkit and had successfully replaced Motif
by the 0.60 release of GIMP.^[40] Finally GTK was re-written to be
object-oriented and was renamed GTK+.^[41] This was first used in the
0.99 release of GIMP. GTK was subsequently adopted for maintenance by
the GNOME Foundation, which uses it in the GNOME desktop environment.
The GTK 2.0.0 release series introduced new features which include
improved text rendering using Pango, a new theme engine, improved
accessibility using the Accessibility Toolkit, transition to Unicode
using UTF-8 strings, and a more flexible API. Starting with version
2.8, GTK 2 depends on the Cairo graphics library for rendering vector
graphics.
GTK version 3.0.0 included revised input device handling, support for
themes written with CSS-like syntax, and the ability to receive
information about other opened GTK applications.
The '+' was dropped returning to simply 'GTK' in February 2019 during a
Hackathon.^[42]
macOS[edit]
With Quartz-backend^[43] GTK is available in macOS.^[44]
Windows[edit]
* After GTK 2.24.10 and 3.6.4 Development of Windows with Installer
was closed by Gnome. Installation of MSYS2 on Windows is a good way
to use actual GTK.^[45]
* GTK 2.24.10 and 3.6.4 is available in Internet, but very buggy and
limited against actual versions.^[46]^[47]
* A version for Windows 64-bit is prepared by Tom Schoonjans with
2.24.33 (actual like Linux) and 3.24.24 (actual like Linux) from
January 2021 available.^[48]
* Windows 10's Fall Creators Update includes Windows Subsystem for
Linux (WSL). With Linux distributions like Ubuntu or Debian
available from the Microsoft Store and an X server like Xming or
VcXsvr, thousands of programs like GTK 2 or 3 can run with X or
terminal support.
OpenVMS[edit]
HP stated that their goal was to merge the needed OpenVMS changes into
the GTK Version 1.3 development stream,^[49] however this never
materialised. The latest version of GTK for OpenVMS is version
1.2.10.^[50]
GTK 4[edit]
One of the cardinal novelties implemented during the GTK 4 development
cycle (i.e. GTK 3.92, etc.) has been the removal of customization
option for the user side (like individual keyboard shortcuts that could
be set in GTK+ 2), the delegation of functionality to ancillary objects
instead of encoding it into the base classes provided by GTK.
* the event handling from signal handlers described by GtkWidget is
delegated to event controllers
* the rendering is delegated to GtkSnapshot objects
* the layout mechanism from GtkWidget is delegated to
GtkLayoutManager
In 2018-Jan-26 at DevConf.cz Matthias Clasen gave an overview of the
then current state of GTK 4 development, including a high-level
explanation of how rendering and input worked in GTK 3, what changes
were being made to GTK 4, and the reasons for those changes. Examples
of things that have become possible with GTK 4 were given as well.^[51]
Releases[edit]
Legend:
Old version
Older version, still maintained
Latest version
Latest preview version
Future release
Release series Initial release Major enhancements Latest minor version
Old version, no longer maintained: 1.0 1998-04-13^[52] First stable
version 1.0.6
Old version, no longer maintained: 1.2 1999-02-25^[53] New widgets:
* GtkFontSelector
* GtkPacker
* GtkItemFactory
* GtkCTree
* GtkInvisible
* GtkCalendar
* GtkLayout
* GtkPlug
* GtkSocket
1.2.10
Old version, no longer maintained: 2.0 2002-03-11^[54] GObject
Overall support for UTF-8
2.0.9
Old version, no longer maintained: 2.2 2002-12-22^[55] Multihead
support 2.2.4
Old version, no longer maintained: 2.4 2004-03-16^[56] New widgets:
* GtkFileChooser
* GtkComboBox
* GtkComboBoxEntry
* GtkExpander
* GtkFontButton
* GtkColorButton
2.4.14
Old version, no longer maintained: 2.6 2004-12-16^[57] New widgets:
* GtkIconView
* GtkAboutDialog
* GtkCellView
The last to support Windows 98/Me
2.6.10
Old version, no longer maintained: 2.8 2005-08-13^[58] Most widgets are
rendered by Cairo 2.8.20
Old version, no longer maintained: 2.10 2006-07-03^[59] New widgets:
* GtkStatusIcon
* GtkAssistant
* GtkLinkButton
* GtkRecentChooser
Print support: GtkPrintOperation
2.10.14
Old version, no longer maintained: 2.12 2007-09-14^[60] GtkBuilder
2.12.12
Old version, no longer maintained: 2.14 2008-09-04^[61] JPEG 2000 load
support 2.14.7
Old version, no longer maintained: 2.16 2009-03-13^[62] New widget:
GtkOrientable
Caps Lock warning in password entry
Improvements on GtkScale, GtkStatusIcon, GtkFileChooser
2.16.6
Old version, no longer maintained: 2.18 2009-09-23^[63] New widget:
GtkInfoBar
Improvement on file chooser, printing
To remove much of the necessary IPC between the X11 application and the
X11 server, GDK is rewritten (mainly by Alexander Larsson) to use
"client-side windows", i.e., the GdkWindow, which every widget must
have, belongs now to the client
2.18.9
Old version, no longer maintained: 2.20 2010-03-23^[64] New widgets:
* GtkSpinner
* GtkToolPalette
* GtkOffscreenWindow
Improvement on file chooser, keyboard handling, GDK
Introspection data is now included in GTK
2.20.1
Old version, no longer maintained: 2.22 2010-09-23^[65] GdkPixbuf moved
to separate module
Most GDK drawing are based on Cairo
Many internal data are now private and can be sealed in preparation to
GTK 3
2.22.1
Old version, no longer maintained: 2.24 2011-01-30^[66] New widget:
GtkComboBoxText which had previously been a custom widget shipped with
Gtkmm
The CUPS print backend can send print jobs as PDF
GtkBuilder has gained support for text tags and menu toolbuttons and
many introspection annotation fixes were added
Migrating from GTK+ 2.x to GTK+ 3
2.24.32
(2018-01-08)
Old version, no longer maintained: 3.0 2011-02-10^[67] Development and
design of the GTK 3 release of the toolkit started in February 2009
during the GTK Theming Hackfest held in Dublin^[68]
* The first draft of the development roadmap was released on 9 April
2009^[69]
Completed mostly Project Ridley
* the attempt to consolidate several libraries that were external to
GTK+
* including libgnome, libgnomeui, libgnomeprint22, libgnomeprintui22,
libglade, libgnomecanvas, libegg, libeel, gtkglext, and
libsexy^[70]
All the rendering is done using Cairo
GDK became more X11 agnostic
XInput2, theme API is based on Cascading Style Sheets (CSS), worsening
the achievable performance for 60 Hz frame rates
3.0.12
Old version, no longer maintained: 3.2 2011-09-25^[71] New widgets:
* GtkLockButton
* GtkOverlay
New Font Chooser dialog
New experimental backends:
* Wayland
* HTML5 (named "Broadway")
3.2.4
Old version, no longer maintained: 3.4 2012-03-26^[72] Menu support in
GtkApplication
A new color chooser
Added support for touch devices
Added support for smooth scrolling
GtkScrolledWindow will do kinetic scrolling with touch devices
macOS support is improved
This is the first version of GTK 3 that works well on Windows
The Wayland backend is updated to the current Wayland version
Spin buttons have received a new look
Accessibility: the treeview accessible support is rewritten
More complete CSS theming support
3.4.4
Old version, no longer maintained: 3.6 2012-09-24^[73] New widgets:
* GtkSearchEntry
* GtkMenuButton
* GtkLevelBar
Vertical spin buttons
CSS animations, blur shadows
Support for cross-fading and transitions in themes
3.6.5
Old version, no longer maintained: 3.8 2013-03-25^[74] Wayland 1.0
stable support
Support for the broadwayd server
Improved theming
Better geometry management
Touch improvements
Support with the window manager for the frame synchronization protocol
GdkFrameClock added^[75]
3.8.9
Old version, no longer maintained: 3.10 2013-09-23^[76] New widgets:
* GtkHeaderBar
* GtkPlacesSidebar
* GtkStack
* GtkStackSwitcher
* GtkRevealer
* GtkSearchBar
* GtkListBox
Support for Wayland 1.2
* maximization
* animated cursors
* multiple monitors
* settings
* custom surfaces
* frame synchronization
Added:
* client-side decorations
* scaled output support on high-dpi screens
* fine-adjustment mode for scrolling
Removed:
* support for the Motif DND protocol
* support for multiple screens per display
* gdk_window_get_display
* gtk_widget_push_composite_child
Tear-off menu-items, plus many GTK settings
The modern GTK drawing model
3.10.9
Old version, no longer maintained: 3.12 2014-03-25^[77] Client-side
decorations^[78]
Support for Wayland 1.5
New widget: GtkPopover (an alternative to menus and dialogs)
3.12.2
Old version, no longer maintained: 3.14 2014-09-22^[79] GtkInspector (a
copy of gtkparasite) introduced^[80]^[81]
Improved support for gestures/multi-touch merged^[82]^[83]
Deprecated:^[84]
* GtkMisc
* GtkAlignment
* GtkArrow
* GdkColor
* Style regions
* support for .icon files
* gdk_window_flush
* drawing outside of begin/end paint
Most widgets converted to use gestures internally
Wayland supports GNOME Shell classic mode^[85]
3.14.15
Old version, no longer maintained: 3.16 2015-03-22^[86] GDK supports
rendering windows using OpenGL for X11 and Wayland using libepoxy
New widgets:
* GtkGLArea
* GtkStackSidebar
* GtkModelButton
* GtkPopoverMenu
Scrolling overhauled (scrollbar hidden by default^[87])
Experimental Mir backend^[88]
3.16.7
Old version, no longer maintained: 3.18 2015-09-23^[89] Add CSS node
infrastructure
More filechooser design refresh and better filechooser search
Dropped Windows XP support
Model support for list and flow box
Kinetic touchpad scrolling
Touchpad gestures (Wayland)
gtk-builder-tool utility
Output-only windows
3.18.9
Old version, no longer maintained: 3.20 2016-03-21^[90] Further
Integration of CSS nodes^[91]
Move drag and drop down to GDK
New widget: GtkShortcutsWindow (shows keyboard shortcuts and gestures
of an application)
3.20.10
Old version, no longer maintained: 3.22 2016-09-21^[92] Last 3.x
release^[25]
Wayland tablet support is merged,^[93] support for graphics tablets is
considered feature complete^[94]
GTK 3.22 shall be as rock-stable (and hence "boring") as GTK
2^[32]^[95]^[96]
for 3+ years
3.22.29
Older version, yet still maintained: 3.24 2018-09-03^[97] 3.22 was
supposed to be the last version of GTK 3 series
* 3.24 was mainly released to ease migrating from GTK+ 3.x to GTK+ 4
Dependency bumps - require:
* libepoxy 1.4
* pango 1.41
New font chooser features:
* allow setting OpenType font features
* show examples for OpenType font features
* allow selecting OpenType font variations
* support levels of details for selection
New Emoji features:
* support a completion popup for Emoji
* drop Ctrl-Shift-e shortcut
Other new APIs: gdk_window_move_to_rect
Wayland: use anonymous shared memory on FreeBSD
Backported event controllers from GTK 4:
* GtkEventControllerScroll
* GtkEventControllerMotion
* GtkEventControllerKey
* GtkGestureStylus
Deprecate a few APIs that are gone in GTK 4:
* focus chains in GtkContainer
* stepper sensitivity in GtkRange
3.23.0
3.23.1
3.23.2
3.23.3
3.24.0
...3.24.5
3.24.14
...
3.24.29
Old version, no longer maintained: 3.90 2017-03-31^[98] GTK Scene Graph
Kit (GSK) merged^[5]
Remove any API marked as deprecated
* before (2016-09-22) vs. after
Heavy development
* break API & ABI^[95]^[96]
A new Vulkan-renderer augments the old Cairo-renderer^[99]
3.89.1
3.89.2
3.89.4
3.89.5
3.90
Old version, no longer maintained: 3.92 2017-10-18^[100]^[101] As GNOME
3.26 was released already on September 13, 2017,^[102] it was not based
on GTK 3.92.
GNU autotools was replaced with Meson.
3.91.0
3.91.1
3.91.2
3.92.1
Old version, no longer maintained: 3.94 2018-06-26^[103] 3.93
* GdkScreen, GdkVisual removed
* GdkDeviceManager replaced by GdkSeat
* Clipboard handling is moved from GTK to GDK
* GdkEvent is converted to an opaque GObject
* the GL renderer in GSK is substantially completed, and is now on
par with the Vulkan renderer
* the use of GdkPixbuf in APIs is reduced
+ and the GskTexture object is moved to GDK as GdkTexture, to
take its place
* the Wayland backend now implements the KDE server-side decoration
protocol
* Broadway is ported to GSK.
GdkWindow renamed to GdkSurface
New abstraction for drawable content: GdkPaintable
There is support for displaying media with:
* GtkVideo
* GtkMediaFile
* GtkMediaStream
* GtkMediaControls
3.93
3.94.0
Old version, no longer maintained: 3.96 2019-05-07^[104] The
gtk4-builder-tool simplify command has gained a --3to4 option to
convert GTK3 ui files to GTK4; though with AMTK menus, toolbars or
other objects like GtkShortcutsWindow are created programmatically (not
with a *.ui file), but with convenient APIs.^[105]
GtkWidget can now use a GtkLayoutManager for size allocation
* layout managers can optionally use layout children holding layout
properties
* GtkBinLayout, GtkBoxLayout, GtkGridLayout, GtkFixedLayout and
GtkCustomLayout are currently available
* more layout manager implementations will appear in the future
Focus handling has been rewritten, and focus-change event generation
has been unified with crossing events
Events have been simplified and are just used for input:
* expose events have been replaced by a GdkSurface::render signal
* configure events have been replaced by a GdkSurface::size-changed
signal
* map events have been replaced by a GdkSurface::mapped property
* gdk_event_handler_set has been replaced by a GdkSurface::event
signal
* key events no longer contain a string
* events on unmapped widgets are ignored
3.96.0
Old version, no longer maintained: 3.98 2020-02-10^[104]
* Performance improvements
* Drag and drop refactoring
* Moving GDK towards Wayland
* Removals
+ GtkMenu, GtkToolbar and similar classes have been replaced by
GMenu.
* Additions
+ Emoji chooser
+ Text widgets now have undo stacks
+ A new layout manager^[106]
3.98.5
Old version, no longer maintained: 3.99.0 2020-07-31^[107]
* Introduced successor to Accessibility Toolkit (ATK).^[108] The new
approach will implement WAI-ARIA (World Wide Web Consortium (W3C)
Accessibility Initiative - Accessible Rich Internet Applications).
* Updated headers to use standard C types instead of GLib types
* New widgets
* Fixes and improvements^[107]
3.99.4
Old version, no longer maintained: 4.0 2020-12-16^[109] 4.0.2
Old version, no longer maintained: 4.2 2021-03-30^[110]
Old version, no longer maintained: 4.4 2021-08-23^[111]
Current stable version: 4.6 2021-12-30^[112]
See also[edit]
* Free and open-source software portal
* Client-Side Decoration
* List of widget toolkits
* GDK - the GIMP Drawing Kit lies between the xlib and the GTK
library, handling basic rendering such as drawing primitives,
raster graphics (bitmaps), cursors, fonts, as well as window events
and drag-and-drop functionality
* gtkmm - C++ bindings for GTK
* Qt - cross platform framework and toolkit
* Xojo - cross-platform development tool and framework
* Enlightenment Foundation Libraries (EFL) - widget toolkit written
for the Enlightenment window manager
* FLTK - a light, cross-platform, non-native widget toolkit
* FOX toolkit - a fast, open source, cross-platform widget toolkit
* IUP - a multi-platform toolkit for building native graphical user
interfaces
* Ultimate++
* Visual Component Library (VCL)
* Vala - an object-oriented programming language with a self-hosting
compiler that generates C code and uses the GObject system.
* wxWidgets - a cross-platform GUI toolkit whose goal is to directly
use each platform's native graphic API whenever possible.
References[edit]
1. ^ "The GTK Open Source Project on Open Hub: Languages Page".
www.openhub.net.
2. ^ ^a ^b Bassi, Emmanuele (6 February 2019). "Project rename to
"GTK"". mail.gnome.org. GNOME mailinglist. Retrieved 7 February
2019.
3. ^ The GTK+ Team. "GTK+ Features". Archived from the original on 25
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4. ^ "Documentation". www.x.org.
5. ^ ^a ^b "Projects/GTK/Roadmap - GNOME Wiki!". wiki.gnome.org.
6. ^ "GTK 4.0 - GTK Development Blog". Retrieved 18 October 2021.
7. ^ "GTK+ 3 Reference Manual". Retrieved 15 July 2017.
8. ^ "Using GTK+ with Broadway". GNOME Developer. GNOME. Retrieved 6
March 2018.
9. ^ "Broadway - GitHub symbiose/symbiose Wiki". GitHub. Retrieved 6
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10. ^ "GTK+ to Use Cairo Vector Engine". Retrieved 27 December 2009.
11. ^ "Gtk: Migrating from GTK 2.x to GTK 3". docs.gtk.org. Retrieved
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12. ^ "Matthias Clasen DevConf.cz 2018 talk about GTK+ 4" (PDF). 26
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13. ^ "Introducing GtkInspector". 15 May 2014.
14. ^ "Another GtkInspector update". 11 July 2014.
15. ^ "Debian -- Package Search Results -- gazpacho".
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16. ^ "Nothing-personal - A development site for Crow Designer,
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17. ^ The GTK+ Team. "GTK+ Language Bindings". www.gtk.org. Archived
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18. ^ ^a ^b "Gtk# is a Mono/.NET binding to the cross platform Gtk+ GUI
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25. ^ ^a ^b "Versioning and long term stability promise in GTK". GTK
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26. ^ "GTK+ 3.24 To Deliver Some New Features While Waiting For GTK4".
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27. ^ "GTK 4.0". GTK development blog. 16 December 2020.
28. ^ "Development release GIMP 2.99.2 is out". Gimp news. 6 November
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30. ^ "How Does One Create A Gtk+ Application? - Morten Welinder".
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31. ^ mclasen (20 November 2015). "A GTK+ update". Goings on.
32. ^ ^a ^b "GUADEC2013: Benjamin Otte talks about GTK+". GUADEC.
33. ^ Larabel, Michael (12 January 2014). "The Biggest Problem With GTK
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34. ^ Hong Jen Yee (26 March 2013). "PCManFM Qt 0.1.0 released".
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35. ^ "Audacious - An Advanced Audio Player".
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36. ^ Lindgren, John (6 May 2014). "Ugly window decorations and how to
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37. ^ Gerald Combs (15 October 2013). "We're switching to Qt".
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38. ^ "GTK+". WxWidgets Compared To Other Toolkits.
39. ^ "GTK+ TTY Port". Slashdot. Retrieved 31 August 2010.
40. ^ "LinuxWorld - Where did Spencer Kimball and Peter Mattis go?".
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2013.{{cite web}}: CS1 maint: bot: original URL status unknown
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41. ^ "What is the + in GTK+?". 2011. Archived from the original on 26
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42. ^ "Rename some references to GTK+ (d080be3e) . Commits . GNOME /
gtk". gitlab.gnome.org.
43. ^ "Projects/GTK/OSX - GNOME Wiki!". wiki.gnome.org.
44. ^ "GTK Download: Mac OS X". www.gtk.org.
45. ^ "GTK Download: Windows". www.gtk.org.
46. ^ "GTK+ for Windows Runtime Environment". SourceForge.
47. ^ "GTK+". www.tarnyko.net.
48. ^ "GTK+ for Windows Runtime Environment Installer (fork from
http://gtk-win.sourceforge.net):
tschoonj/GTK-for-Windows-Runtime-Environment-Installer". 19
November 2020 - via GitHub.
49. ^ "HP OpenVMS systems - GTK+".
50. ^ "HP OpenVMS systems - GTK+".
51. ^ https://mclasen.fedorapeople.org/gtk4-devconf2018.pdf^[bare URL
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52. ^ Amundson, Shawn T. (13 April 1998). "ANNOUNCE: GTK+ 1.0.0
Released!". GNOME Mail Services (Mailing list). Retrieved 20 May
2019.
53. ^ Amundson, Shawn T. (25 February 1999). "ANNOUNCE: GTK+ and GLib
1.2.0 Released". GNOME Mail Services (Mailing list). Retrieved 20
May 2019.
54. ^ Taylor, Owen (11 March 2002). "GTK+-2.0.0 released". GNOME Mail
Services (Mailing list). Retrieved 20 May 2019.
55. ^ Taylor, Owen (22 December 2002). "GTK+-2.2.0 released". GNOME
Mail Services (Mailing list). Retrieved 20 May 2019.
56. ^ Taylor, Owen (16 March 2004). "GTK+-2.4.0 released". GNOME Mail
Services (Mailing list). Retrieved 20 May 2019.
57. ^ Clasen, Matthias (16 December 2004). "GTK+-2.6.0 released". GNOME
Mail Services (Mailing list). Retrieved 20 May 2019.
58. ^ Clasen, Matthias (13 August 2005). "GTK+ 2.8.0 released". GNOME
Mail Services (Mailing list). Retrieved 20 May 2019.
59. ^ Clasen, Matthias (3 July 2006). "GTK+ 2.10 released". GNOME Mail
Services (Mailing list). Retrieved 20 May 2019.
60. ^ Clasen, Matthias (14 September 2007). "GTK+ 2.12 released". GNOME
Mail Services (Mailing list). Retrieved 20 May 2019.
61. ^ Clasen, Matthias (4 September 2008). "GTK+ 2.14.0 released".
GNOME Mail Services (Mailing list). Retrieved 20 May 2019.
62. ^ Clasen, Matthias (13 March 2009). "GTK+ 2.16.0 released". GNOME
Mail Services (Mailing list). Retrieved 20 May 2019.
63. ^ Clasen, Matthias (23 September 2009). "GTK+ 2.18.0 released".
GNOME Mail Services (Mailing list). Retrieved 20 May 2019.
64. ^ Clasen, Matthias (23 March 2010). "GTK+ 2.20.0 released". GNOME
Mail Services (Mailing list). Retrieved 20 May 2019.
65. ^ Clasen, Matthias (23 September 2010). "GTK+ 2.22.0 released".
GNOME Mail Services (Mailing list). Retrieved 20 May 2019.
66. ^ Clasen, Matthias (20 January 2011). "GTK+ 2.24.0". GNOME Mail
Services (Mailing list). Retrieved 20 May 2019.
67. ^ Clasen, Matthias (10 February 2011). "GTK+ 3.0.0 released". GNOME
Mail Services (Mailing list). Retrieved 20 May 2019.
68. ^ "Gtk+ 3.0 Theming API Hackfest". Silicon Island. Retrieved 3 June
2017.
69. ^ "Gtk+ 3 roadmap draft". Retrieved 3 June 2017.
70. ^ "Attic/ProjectRidley - GNOME Wiki!". wiki.gnome.org.
71. ^ Clasen, Matthias (25 September 2011). "GTK+ 3.2.0". GNOME Mail
Services (Mailing list). Retrieved 20 May 2019.
72. ^ Clasen, Matthias (26 March 2012). "GTK+ 3.4.0 released". GNOME
Mail Services (Mailing list). Retrieved 20 May 2019.
73. ^ Clasen, Matthias (24 September 2012). "GTK+ 3.6.0 released".
GNOME Mail Services (Mailing list). Retrieved 20 May 2019.
74. ^ Clasen, Matthias (25 March 2013). "GTK+ 3.8.0 released". GNOME
Mail Services (Mailing list). Retrieved 20 May 2019.
75. ^ "Frame clock: GDK 3 Reference Manual". developer.gnome.org.
76. ^ Clasen, Matthias (23 September 2013). "GTK+ 3.10.0 released".
GNOME Mail Services (Mailing list). Retrieved 20 May 2019.
77. ^ Clasen, Matthias (25 March 2014). "GTK+ 3.12 released". GNOME
Mail Services (Mailing list). Retrieved 20 May 2019.
78. ^ "Client-side decorations in themes | Goings on".
79. ^ Clasen, Matthias (22 September 2014). "GTK+ 3.14.0 released".
GNOME Mail Services (Mailing list). Retrieved 20 May 2019.
80. ^ Matthias Clasen (15 May 2014). "GtkInspector Author's blog
entry". Retrieved 17 May 2014.
81. ^ "GtkInspector in GNOME wiki". 15 May 2014. Retrieved 17 May 2014.
82. ^ "Merging gestures into 3.14". 23 May 2014. Retrieved 23 May 2014.
83. ^ "RFC: gestures". 4 March 2014. Retrieved 23 May 2014.
84. ^ "gtk+ 3.13.2". 27 May 2014.
85. ^ "gtk+ 3.13.3". 24 June 2014.
86. ^ Clasen, Matthias (22 March 2015). "GTK+ 3.16.0 released". GNOME
Mail Services (Mailing list). Retrieved 20 May 2019.
87. ^ online, heise. "Linux-Desktop: Neues Gnome zeigt Nachrichten
oben". heise online. Retrieved 3 June 2017.
88. ^ "GTK+ 3.16.0 released". mail.gnome.org. Retrieved 3 June 2017.
89. ^ Nestor, Marius (24 September 2015). "GTK+ 3.18.0 Officially
Released as Part of the GNOME 3.18 Desktop Environment". Softpedia.
Retrieved 25 May 2019.
90. ^ Clasen, Matthias (21 March 2016). "GTK+ 3.20". GNOME Mail
Services (Mailing list). Retrieved 20 May 2019.
91. ^ "GTK+ 3.20 - Style Classes and Element Names". 20 November 2015.
92. ^ Clasen, Matthias (21 September 2016). "GTK+ 3.22 released". GNOME
Mail Services (Mailing list). Retrieved 20 May 2019.
93. ^ "GTK+ Wayland tablet support is merged - Carlos Garnacho".
94. ^ "hutterer input". www.x.org.
95. ^ ^a ^b "Gtk 4.0 will not be stable until Gtk 4.6". 13 June 2016.
96. ^ ^a ^b "Gtk 5.0 will not be stable until Gtk 5.6". 14 June 2016.
97. ^ Clasen, Matthias (3 September 2018). "gtk+ 3.24.0". GNOME Mail
Services (Mailing list). Retrieved 20 May 2019.
98. ^ Clasen, Matthias (31 March 2017). "gtk+ 3.90.0". GNOME Mail
Services (Mailing list). Retrieved 20 May 2019.
99. ^ "Commits . master . GNOME / gtk". GitLab.
100. ^ Clasen, Matthias (18 October 2017). "gtk+ 3.92.1". GNOME Mail
Services (Mailing list). Retrieved 20 May 2019.
101. ^ Clasen, Matthias (23 October 2017). "GTK+ 3.92". GTK Development
Blog. Retrieved 25 May 2019.
102. ^ "GNOME 3.26 Released". 13 September 2017.
103. ^ Clasen, Matthias (26 June 2018). "gtk+ 3.94.0". GNOME Mail
Services (Mailing list). Retrieved 20 May 2019.
104. ^ ^a ^b Clasen, Matthias (7 May 2019). "gtk 3.96". GNOME Mail
Services (Mailing list). Retrieved 28 May 2019.
105. ^ "Introducing amtk".
106. ^ Clasen, Matthias (13 February 2020). "GTK 3.98". GTK+
Development Blog. Retrieved 18 February 2020.
107. ^ ^a ^b Clasen, Matthias (9 June 2021). "gtk 4.3.1". FTP Releases
(Mailing list). Retrieved 10 July 2021.
108. ^ "Emmanuele Bassi / guadec-2020". GitLab.
109. ^ Clasen, Matthias (16 December 2020). "gtk 4.0.0". GNOME Mail
Services (Mailing list). Retrieved 16 December 2020.
110. ^ Clasen, Matthias (30 March 2021). "gtk 4.2.0". GNOME Mail
Services (Mailing list). Retrieved 30 March 2021.
111. ^ Clasen, Matthias (23 August 2021). "gtk 4.4.0". GNOME Mail
Services (Mailing list). Retrieved 23 January 2022.
112. ^ Clasen, Matthias (30 December 2021). "gtk 4.6.0". FTP Releases
(Mailing list). Retrieved 23 January 2022.
Bibliography[edit]
*
Krause, Andrew (23 April 2007), Foundations of GTK+ Development
(1st ed.), Apress, ISBN 978-1-59059-793-4
Wright, Peter (15 May 2000), Beginning GTK+ and GNOME (1st ed.), Peer
Information, ISBN 978-1-86100-381-2
Logan, Syd (6 September 2001), Gtk+ Programming in C (1st ed.),
Prentice Hall, ISBN 978-0-13-014264-1
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