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[[Category:Widget Toolkits]]
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[[Category:Widget toolkits]]
 
[[cs:GTK+]]
 
[[cs:GTK+]]
 
[[de:GTK+]]
 
[[de:GTK+]]
[[es:Improve GTK Application Looks]]
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[[es:GTK+]]
 
[[it:GTK+]]
 
[[it:GTK+]]
[[uk:GTK+]]
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[[ja:GTK+]]
[[zh-CN:GTK+]]
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[[ru:GTK+]]
{{Article summary start}}
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[[zh-hans:GTK+]]
{{Article summary text|This articles details theme configuration of GTK+ applications. GTK+ (GIMP Toolkit) is a cross-platform widget toolkit for creating graphical user interfaces. This article will explore the tools used to configure the GTK+ theme, style, icon, font and font size, and also detail manual configuration.}}
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{{Related articles start}}
{{Article summary heading|Related}}
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{{Related|Uniform look for Qt and GTK applications}}
{{Article summary wiki|Uniform Look for Qt and GTK Applications}}
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{{Related|Qt}}
{{Article summary wiki|Qt}}
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{{Related|GNU Project}}
{{Article summary wiki|GNU Project}}
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{{Related|GTK+/Development}}
{{Article summary end}}
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{{Related articles end}}
 +
From the [http://www.gtk.org GTK+ website]:
 +
:GTK+, or the GIMP Toolkit, is a multi-platform toolkit for creating graphical user interfaces. Offering a complete set of widgets, GTK+ is suitable for projects ranging from small one-off tools to complete application suites.
 +
 
 +
GTK+, The GIMP Toolkit, was initially made by the [[GNU Project]] for the [[GIMP]] but is now a very popular toolkit with bindings for many languages. This article will explore the tools used to configure the GTK+ theme, style, icon, font and font size, and also detail manual configuration.
 +
 
 +
== Installation ==
 +
 
 +
Two versions of GTK+ are currently available in the [[official repositories]]. They can be [[install]]ed with the following packages:
 +
* '''GTK+ 3.x''' is available with the {{Pkg|gtk3}} package.
 +
* '''GTK+ 2.x''' is available with the {{Pkg|gtk2}} package.
 +
* '''GTK+ 1.x''' is available with the {{AUR|gtk}} package.
 +
 
 +
== Themes ==
 +
 
 +
In GTK+ 2, the default theme is ''Raleigh'', but Arch Linux has a custom configuration file at {{ic|/usr/share/gtk-2.0/gtkrc}}, which sets the default theme to ''Adwaita''. In GTK+ 3, the default theme is ''Adwaita'', but ''HighContrast'', ''HighContrastInverse'' and ''Raleigh'' themes are also included.
 +
 
 +
To force a specific theme, you can set environment variables.
 +
* For GTK+ 2, use the {{ic|GTK2_RC_FILES}} environment variable, for example:
 +
$ GTK2_RC_FILES=/usr/share/themes/Industrial/gtk-2.0/gtkrc gimp
 +
:will launch GIMP with the Industrial theme.
 +
* For GTK+ 3, use the {{ic|GTK_THEME}} environment variable, for example:
 +
$ GTK_THEME=Adwaita:dark gnome-calculator
 +
:will launch GNOME Calculator with the dark variant of Adwaita theme.
 +
 
 +
More themes can be installed from the official repositories or the [[AUR]].
  
From the [http://www.gtk.org GTK+ website]:
+
'''GTK+ 2 and GTK+ 3.20 or newer are supported:'''
:''GTK+, or the GIMP Toolkit, is a multi-platform toolkit for creating graphical user interfaces. Offering a complete set of widgets, GTK+ is suitable for projects ranging from small one-off tools to complete application suites.''
+
* {{App|Adapta| An adaptive Gtk+ theme based on Material Design Guidelines. Includes: ''Adapta'', ''Adapta-Eta'', ''Adapta-Nokto'', ''Adapta-Nokto-Eta''|https://github.com/tista500/Adapta|{{Pkg|adapta-gtk-theme}}}}
 +
* {{App|Arc|A flat theme with a modern look and transparent elements. Includes: ''Arc'', ''Arc-Dark'', ''Arc-Darker''|https://github.com/horst3180/arc-theme|with transparency: {{Pkg|arc-gtk-theme}}, without transparency: {{Pkg|arc-solid-gtk-theme}}}}
 +
* {{App|Breeze|GTK+ version of KDE's default widget theme. Includes: ''Breeze'', ''Breeze-Dark''|https://cgit.kde.org/breeze-gtk.git|{{Pkg|breeze-gtk}}}}
 +
* {{App|Deepin|Default theme for the Deepin desktop. Includes: ''deepin'', ''deepin-dark''|https://github.com/linuxdeepin/deepin-gtk-theme|{{Pkg|deepin-gtk-theme}}}}
 +
* {{App|GNOME Standard Themes|Default themes for the GNOME desktop. Includes: ''Adwaita'', ''Adwaita-dark'', ''HighContrast''|https://github.com/GNOME/gnome-themes-standard|{{Pkg|gnome-themes-standard}}}}
 +
* {{App|MATE Themes|Default themes for the MATE desktop. Includes: ''BlackMATE'', ''Blue-Submarine'', ''BlueMenta'', ''ContrastHighInverse'', ''Green-Submarine'', ''GreenLaguna'', ''Menta'', ''TraditionalGreen'', ''TraditionalOk''|https://github.com/mate-desktop/mate-themes|{{Pkg|mate-themes}}}}
 +
* {{App|Numix|A flat and light theme with a modern look (GNOME, Openbox, Unity, Xfce). Includes: ''Numix''|https://github.com/shimmerproject/Numix|{{Pkg|numix-gtk-theme}}}}
 +
* {{App|Blackbird|Dark Desktop Suite for Xfce.|https://github.com/shimmerproject/Blackbird|{{AUR|xfce-theme-blackbird}}}}
 +
* {{App|Materia Theme| A Material Design-like flat theme for GTK3, GTK2, and GNOME-Shell.|https://github.com/nana-4/materia-theme|{{AUR|materia-theme}}}}
 +
* {{App|Gnome-breeze|A GTK theme created to match with the new Plasma 5 Breeze.|https://github.com/dirruk1/gnome-breeze|{{AUR|gnome-breeze-git}}}}
 +
* {{App|Greybird|A grey and blue Xfce theme, used by default in Xubuntu 12.04.|https://github.com/shimmerproject/Greybird|{{AUR|xfce-theme-greybird}}}}
 +
* {{App|Vertex|Theme for GTK 3, GTK 2, Gnome-Shell and Cinnamon.|https://github.com/horst3180/vertex-theme|{{AUR|vertex-themes}}}}
 +
* {{App|Zuki|Themes for GTK, gnome-shell and more.|https://github.com/lassekongo83/zuki-themes|{{AUR|zuki-themes-git}}}}
  
GTK+, The GIMP Toolkit, was initially made by the [[GNU Project]] for the [[GIMP]] but is now a very popular toolkit with bindings for many languages.  
+
'''Only GTK+ 2 is supported:'''
 +
* {{App|GTK+ Engines|Theme engines for GTK+ 2. Includes: ''Clearlooks'', ''Crux'', ''Industrial'', ''Mist'', ''Redmond'', ''ThinIce''|https://github.com/GNOME/gtk-engines|{{Pkg|gtk-engines}}}}
 +
* {{App|Xfce Gtk+ Engine|Xfce Gtk+-2.0 engine and themes|http://git.xfce.org/xfce/gtk-xfce-engine/|{{Pkg|gtk-xfce-engine}}}}
 +
* {{App|Oxygen-Gtk|Port of the default KDE widget theme (Oxygen) to GTK2|https://cgit.kde.org/oxygen-gtk.git|{{Pkg|oxygen-gtk2}}}}
 +
* {{App|Aurora Gtk Engine|Latest member of the Clearlooks family.|http://gnome-look.org/content/show.php/Aurora+Gtk+Engine?content=56438|{{Pkg|gtk-engine-aurora}}}}
 +
* {{App|QtCurve|A configurable set of widget styles for KDE and Gtk.|https://cgit.kde.org/qtcurve.git|{{Pkg|qtcurve-gtk2}}}}
  
== Configuration programs ==
+
There are a number of additional GTK+ themes in the [[AUR]]: [https://aur.archlinux.org/packages.php?K=gtk-theme search for gtk-theme], [https://aur.archlinux.org/packages.php?K=gtk2-theme search for gtk2-theme].
  
These GUI programs allow theme selection and at least customising of a font. They generally overwrite the {{ic|~/.gtkrc-2.0}} file.
+
{{Note|Because GTK+ 3 changes rapidly, GTK+ 3 themes often require re-working after a GTK+ 3 release. For this reason, not all GTK+ 3 themes may look as intended when used with the latest GTK+ 3 version.}}
  
* {{Pkg|lxappearance}}: A configuration tool from the [[LXDE]] project, which does not require any other parts of LXDE or other desktop environment. More flexible customisation than the other programs.
+
=== GTK+ and Qt ===
* {{Pkg|gtk-chtheme}}
 
* {{Pkg|gtk-theme-switch2}}
 
* {{Pkg|gtk2_prefs}}
 
  
Example install command:
+
If you have GTK+ and Qt (KDE) applications on your desktop then you know that their looks do not blend well. If you wish to make your GTK+ styles match your Qt styles please read [[Uniform look for Qt and GTK applications]].
# pacman -S gtk-theme-switch2
 
  
See also [[Uniform Look for Qt and GTK Applications#Changing styles in each toolkit]].
+
== Configuration tools ==
  
== Themes ==
+
Most major [[desktop environments]] provide tools to configure the GTK+ theme, icons, font and font size, and manage these settings via [http://standards.freedesktop.org/xsettings-spec/xsettings-spec-0.5.html XSettings]:
 +
* If you use [[Cinnamon]], use Themes tool (''cinnamon-settings themes''): go to ''System Settings > Themes''.
 +
* If you use [[Enlightenment]]: go to ''Settings > All > Look > Application Theme''.
 +
* If you use [[GNOME]], use GNOME Tweak Tool (''gnome-tweak-tool''): install {{Pkg|gnome-tweak-tool}}.
 +
* If you use [[MATE]], use the Appearance Preferences tool (''mate-appearance-properties''): go to ''System > Settings > Appearance''.
 +
* If you use [[Xfce]], use the Appearance tool: go to ''Settings > Appearance''.
 +
 
 +
Other GUI tools generally overwrite the [[#Configuration|configuration files]].
  
=== GTK+ 1.x ===
+
'''Both GTK+ 2 and GTK+ 3 are supported:'''
There are loads of GTK+ 1.x themes in the [[AUR]]: [https://aur.archlinux.org/packages.php?K=gtk-theme search for gtk-theme]. A good start is {{AUR|gtk-smooth-engine}}.
+
* {{App|KDE GTK Configurator|Application that allows you to change style and font of GTK+ 2 and Gtk+ 3 applications.|https://cgit.kde.org/kde-gtk-config.git|{{Pkg|kde-gtk-config}}}}
 +
:After installation, {{ic|kde-gtk-config}} can also be found in ''System Settings > Application Style  > GTK''.
 +
* {{App|LXAppearance|Desktop independent GTK+ 2 and GTK+ 3 style configuration tool from the LXDE project (it does not require other parts of the LXDE desktop).|http://wiki.lxde.org/en/LXAppearance|{{Pkg|lxappearance}}}}
 +
* {{App|Oo-mox| Graphical application for generating different color variations of Numix and Flat-Plat themes (GTK+ 2 and 3), Archdroid and Gnome-Colors icon themes. Also allows generating pre-scaled GTK+ 2 themes for HiDPI displays. |https://github.com/actionless/oomox|{{AUR|oomox}}}}
  
Most major [[Desktop Environment|desktop environments]] provide tools to configure the GTK+ theme, icons, font and font size.
+
'''Only GTK+ 2 is supported:'''
 +
* {{App|GTK+ Change Theme|Little program that lets you change your GTK+ 2.0 theme (considered a better alternative to ''switch2'').|http://plasmasturm.org/code/gtk-chtheme/|{{Pkg|gtk-chtheme}}}}
 +
* {{App|GTK+ Preference Tool|GTK+ theme selector and font switcher.|http://gtk-win.sourceforge.net/home/index.php/Main/GTKPreferenceTool|{{Pkg|gtk2_prefs}}}}
 +
* {{App|GTK+ Theme Switch|Simple GTK+ theme switcher.|http://muhri.net/nav.php3?node=gts|{{Pkg|gtk-theme-switch2}}}}
  
Alternatively, use {{Pkg|gtk-theme-switch2}}. Run it with the {{ic|switch}} command.
+
== Configuration ==
  
=== GTK+ 2.x ===
+
GTK+ settings can be specified manually in configuration files, but desktop environments and applications can override these settings. Depending on GTK+ version, these files are located at:
 +
* GTK+ 2 user specific: {{ic|~/.gtkrc-2.0}}
 +
* GTK+ 2 system wide: {{ic|/etc/gtk-2.0/gtkrc}}
 +
* GTK+ 3 user specific: {{ic|$XDG_CONFIG_HOME/gtk-3.0/settings.ini}}, or {{ic|$HOME/.config/gtk-3.0/settings.ini}} if {{ic|$XDG_CONFIG_HOME}} is not set
 +
* GTK+ 3 system wide: {{ic|/etc/gtk-3.0/settings.ini}}
  
There are loads of GTK+ 2.x themes in the [[AUR]]: [https://aur.archlinux.org/packages.php?K=gtk2-theme search for gtk2-theme]. A good start is {{Pkg|gtk-engines}} which includes the popular ''Clearlooks'' theme.
+
{{Note|
 +
*See the [http://library.gnome.org/devel/gtk3/stable/GtkSettings.html#GtkSettings.properties GTK+ 3 ''GtkSettings'' properties] (and [http://library.gnome.org/devel/gtk2/stable/GtkSettings.html#GtkSettings.properties GTK+ 2 properties]) in the GTK+ programming reference manual for the full list of currently supported GTK+ configuration options.
 +
*Some of the settings described below (such as {{ic|gtk-icon-sizes}}) are deprecated and ignored since GTK+ 3.10.
 +
*If you edit your GTK+ configuration files, only newly started applications will display the changes.}}
  
Most major [[Desktop Environment|desktop environments]] provide tools to configure the GTK+ theme, icons, font and font size.
+
=== Basic theme configuration ===
  
Alternatively, GTK+ settings can be configured manually by editing {{ic|~/.gtkrc-2.0}}. A list of GTK+ settings can be found in the [http://library.gnome.org/devel/gtk/stable/GtkSettings.html GNOME library]. To manually change the GTK+ theme, icons, font and font size, add the following to {{ic|~/.gtkrc-2.0}}:
+
To manually change the GTK+ theme, icons, font and font size, add the following to the configuration files, for example:
  
 +
'''GTK+ 2:'''
 
{{hc|~/.gtkrc-2.0|2=
 
{{hc|~/.gtkrc-2.0|2=
gtk-icon-theme-name = "[name-of-icon-theme]"
+
gtk-icon-theme-name = "Adwaita"
gtk-theme-name = "[name-of-theme]"
+
gtk-theme-name = "Adwaita"
gtk-font-name = "[font-name] [size]"
+
gtk-font-name = "DejaVu Sans 11"
 
}}
 
}}
  
For example:
+
'''GTK+ 3:'''
{{hc|~/.gtkrc-2.0|2=
+
{{hc|$XDG_CONFIG_HOME/gtk-3.0/settings.ini|2=
gtk-icon-theme-name = "Tango"
+
[Settings]
gtk-theme-name = "Murrine-Gray"
+
gtk-icon-theme-name = Adwaita
gtk-font-name = "DejaVu Sans 8"
+
gtk-theme-name = Adwaita
 +
gtk-font-name = DejaVu Sans 11
 
}}
 
}}
  
{{Note| The above example requires the packages {{Pkg|ttf-dejavu}}, {{Pkg|tangerine-icon-theme}}, {{Pkg|gtk-engine-murrine}} from the [[Official Repositories|official repositories]], and {{AUR|gtk-theme-murrine-collection}} from the AUR.}}
+
{{Note|The icon theme name is the name defined in the theme's index file, ''not'' the name of its directory.}}
 +
 
 +
=== Dark theme variant ===
 +
 
 +
Some GTK+ 3 themes contain a dark theme variant, but it's only used by default when the application requests it explicitly. To use dark theme variant with all GTK+ 3 applications, set:
 +
 
 +
gtk-application-prefer-dark-theme = true
  
=== GTK+ 3.x ===
+
=== Keyboard shortcuts ===
  
A good start is {{Pkg|gnome-themes-standard}} which includes the popular ''Adwaita'' theme.
+
Keyboard shortcuts (otherwise known as ''accelerators'' in GTK+) may be changed by hovering the mouse over the respective menu item, and pressing the desired key combination. To enable this feature, set:
  
If selected style has both GTK+ 2.x and GTK+ 3.x themes, they will be used. If selected style has only GTK+ 2.x theme, it will be used for GTK+ 2.x applications and (ugly) defaults will be used for GTK+ 3.x applications. If selected style has only GTK+ 3.x theme, it will be used for GTK+ 3.x applications and (ugly) defaults will be used for GTK+ 2.x applications. Thus for uniform UI appearance and best experience one can use style that has both GTK+ 2.x and GTK+ 3.x themes.
+
gtk-can-change-accels = 1
  
Most major [[Desktop Environment|desktop environments]] provide tools to configure the GTK+ theme, icons, font and font size. If you use [[GNOME]], use GNOME Tweak Tool: install {{pkg|gnome-tweak-tool}}. If you use [[Xfce]], use the Appearance tool: go to Settings-->Appearance.
+
==== Emacs keybindings ====
 +
To get Emacs-like keybindings in gtk apps:
  
An alternative without huge dependencies is {{pkg|lxappearance}}.
+
For GTK2, add {{ic|1=gtk-key-theme-name = "Emacs"}} to {{ic|~/.gtkrc-2.0}}.
  
If you prefer not to install a theme manager at all, your theme can be set manually in {{ic|$XDG_CONFIG_HOME/gtk-3.0/settings.ini}} (this is usually {{ic|~/.config/gtk-3.0/settings.ini}}).  An example {{ic|settings.ini}} file:
+
For GTK3 add the following to the noted file:
{{hc|$XDG_CONFIG_HOME/gtk-3.0/settings.ini|2=
+
 +
{{hc|1=~/.config/gtk-3.0/settings.ini|2=
 
[Settings]
 
[Settings]
gtk-application-prefer-dark-theme = false
+
gtk-key-theme-name = Emacs}}
gtk-theme-name = Zukitwo
+
 
gtk-fallback-icon-theme = gnome
+
Then run:
gtk-icon-theme-name = [icon theme name]
 
gtk-font-name = [font name] [font size]
 
  
}}
+
$ gsettings set org.gnome.desktop.interface gtk-key-theme "Emacs"
 +
 
 +
XFCE has a similar setting:
 +
 
 +
$ xfconf-query -c xsettings -p /Gtk/KeyThemeName -s Emacs
 +
 
 +
The config files in {{ic|/usr/share/themes/Emacs/}} determine what the Emacs bindings are, and can be changed.
 +
Copying sections to the users {{ic|~/.gtkrc-2.0}} file allows for changes on a per user basis.
 +
 
 +
=== GNOME menu delay ===
 +
 
 +
This setting controls the delay between pointing the mouse at a menu and that menu opening. This delay is measured in milliseconds.
 +
 
 +
gtk-menu-popup-delay = 0
 +
 
 +
=== Reduce widget sizes ===
 +
 
 +
If you have a small screen or you just do not like big icons and widgets, you can resize things easily.
 +
 
 +
To have icons without text in toolbars ([https://developer.gnome.org/gtk3/stable/gtk3-Standard-Enumerations.html#GtkToolbarStyle valid values]), use
 +
 
 +
gtk-toolbar-style = GTK_TOOLBAR_ICONS
 +
 
 +
To use smaller icons, use a line like this:
 +
 
 +
gtk-icon-sizes = "panel-menu=16,16:panel=16,16:gtk-menu=16,16:gtk-large-toolbar=16,16\
 +
:gtk-small-toolbar=16,16:gtk-button=16,16"
 +
 
 +
Or to remove icons from buttons completely:
 +
 
 +
gtk-button-images = 0
 +
 
 +
You can also remove icons from menus:
 +
 
 +
gtk-menu-images = 0
 +
 
 +
See also [http://martin.ankerl.com/2008/10/10/how-to-make-a-compact-gnome-theme/] and [http://gnome-look.org/content/show.php/Simple+eGTK?content=119812].
 +
 
 +
=== File-Chooser Startup-Location ===
 +
 
 +
Open the file-chooser within the '''current-working-directory''' and not the '''recent''' location. Normally the '''current-working-directory''' is '''home-directory'''.
 +
 
 +
'''GTK+ 3'''
 +
 
 +
Modify DConf with ''gsettings'', as the database file ($XDG_CONFIG_HOME/dconf/users) is binary:
 +
 
 +
$ gsettings set org.gtk.Settings.FileChooser startup-mode cwd
 +
 
 +
'''GTK+ 2'''
 +
 
 +
Modify {{ic|~/.config/gtk-2.0/gtkfilechooser.ini}} configuration file:
 +
 
 +
{{hc|~/.config/gtk-2.0/gtkfilechooser.ini|
 +
StartupMode=cwd}}
 +
 
 +
=== Legacy scrolling behavior ===
 +
 
 +
{{Note|This setting is not obeyed by all GTK+ applications.}}
 +
{{Tip|Legacy scrolling behaviour can be achieved reliably simply by using right click instead of left click.}}
 +
 
 +
Prior to GTK+ 3.6, clicking on either side of the slider in the scrollbar would move the scrollbar in the direction of the click by approximately one page. Since GTK+ 3.6, the slider will move directly to the position of the click. This behaviour can be reverted in some applications by creating the file with the content below:
  
If it still does not change, delete old {{ic|gtk-3.0}} folder in {{ic|$XDG_CONFIG_HOME}} and copy {{ic|gtk-3.0}} folder from /path/to/theme to {{ic|$XDG_CONFIG_HOME}}. Example:
+
{{hc|~/.config/gtk-3.0/settings.ini|<nowiki>
 +
[Settings]
 +
gtk-primary-button-warps-slider = false
 +
</nowiki>}}
  
$ rm -r ~/.config/gtk-3.0/
+
=== Disable overlay scrollbars ===
$ cp -r /usr/share/themes/Zukitwo/gtk-3.0/ ~/.config/ 
 
  
 +
Since GTK+ 3.15, overlay scrollbars are enabled by default, meaning that scrollbars will be shown only on mouseover in GTK+ 3 applications. This behavior can be reverted by setting the following environment variable: {{ic|1=GTK_OVERLAY_SCROLLING=0}}.
  
After this, you need to set the same theme in your DE's appearance configuration tool. There are only a few themes which provide a uniform look for GTK+ 3.x and GTK+ 2.x apps. A few examples:
+
See [[Environment variables#Graphical applications]].
#Adwaita (part of {{pkg|gnome-themes-standard}})
 
#Newlooks for GTK+ 3 and Clearlooks for GTK+ 2
 
#Zukitwo
 
#Elegant Brit
 
#Atolm
 
#Hope
 
  
{{Note|Some themes may require {{pkg|librsvg}} to display correctly, but not all specify it as a dependency.  Try installing it if the chosen theme looks broken.}}
+
==== Remove overlay scroll indicators ====
  
{{Note|There probably are other themes. Some of these themes are available in the AUR. Also, some of them are not usable as-is for displaying a GTK+ 2.x panel (light text over light background), so you need to use the provided [http://i.imgur.com/QmeyN.png panel background].}}
+
The positions of the overlay scrollbars are indicated by thin dashed lines in the application window. These dashed lines will be present even when overlay scrolling is disabled using the environment variable discussed in the section above. To remove the indicator lines, create the following file:
  
You could find what themes installed on your system  have both an GTK+ 2.x and GTK+ 3.x version by using this command (don't work with names containing spaces):
+
{{hc|~/.config/gtk-3.0/gtk.css|
find $(find ~/.themes /usr/share/themes/ -wholename "*/gtk-3.0" | sed -e "s/^\(.*\)\/gtk-3.0$/\1/")\
+
/* Remove dotted lines from GTK+ 3 applications */
-wholename "*/gtk-2.0" | sed -e "s/.*\/\(.*\)\/gtk-2.0/\1"/
+
undershoot.top, undershoot.right, undershoot.bottom, undershoot.left { background-image: none; }
 +
}}
  
=== GTK+ and Qt ===
+
== GDK backends  ==
If you have GTK+ and Qt (KDE) applications on your desktop then you know that their looks do not blend well. If you wish to make your GTK+ styles match your Qt styles please read [[Uniform Look for Qt and GTK Applications]].
+
 
 +
GDK (the underlying abstraction layer of GTK+) supports multiple backends to display GTK+ applications. The default backend is ''x11''.
  
=== GTK+ and HTML with Broadway ===
+
=== Broadway backend ===
 
The GDK Broadway backend provides support for displaying GTK+ applications in a web browser, using HTML5 and web sockets.  
 
The GDK Broadway backend provides support for displaying GTK+ applications in a web browser, using HTML5 and web sockets.  
 
[https://developer.gnome.org/gtk3/3.8/gtk-broadway.html]
 
[https://developer.gnome.org/gtk3/3.8/gtk-broadway.html]
Line 122: Line 247:
  
 
Port Used on default
 
Port Used on default
  port &#61; 8080 + ($display_number - 1)
+
  port &#61; 8080 + $display_number
  
Point your browser to http://localhost:port
+
Point your browser to http://127.0.0.1:port
  
 
To Start apps
 
To Start apps
Line 134: Line 259:
 
  $ broadwayd --port $port_number --address $address $display_number
 
  $ broadwayd --port $port_number --address $address $display_number
  
== Configuration file ==
+
=== Wayland backend ===
 +
 
 +
The GDK [[Wayland]] backend can be enabled by setting the {{ic|GDK_BACKEND&#61;wayland}} environment variable.
 +
 
 +
{{Tip|To disable GTK window decorations in Wayland, [[install]] the {{AUR|gtk3-optional-csd}} package and set the environment variable {{ic|1=GTK_CSD=0}}.}}
 +
 
 +
== Troubleshooting ==
 +
 
 +
=== Different themes between GTK+ 2 and GTK+ 3 applications ===
 +
 
 +
In general, if a selected theme has support for both GTK+ 2 and GTK+ 3, the theme will be applied to all GTK+ 2 and GTK+ 3 applications. If a selected theme has support for only GTK+ 2, it will be used for GTK+ 2 applications and the default GTK+ theme will be used for GTK+ 3 applications. If the selected theme has support for only GTK+ 3, it will be used for GTK+ 3 applications and the default GTK+ theme will be used for GTK+ 2 applications. Thus for application theme consistency, it is best to use a theme which has support for both GTK+ 2 and GTK+ 3.
 +
 
 +
You could find what themes installed on your system  have both an GTK+ 2 and GTK+ 3 version by using this command (does not work with names containing spaces):
 +
find $(find ~/.themes /usr/share/themes/ -wholename "*/gtk-3.0" | sed -e "s/^\(.*\)\/gtk-3.0$/\1/") -wholename "*/gtk-2.0" | sed -e "s/.*\/\(.*\)\/gtk-2.0/\1"/
 +
 
 +
=== Theme not applied to root applications ===
 +
 
 +
As user theme files ({{ic|$XDG_CONFIG_HOME/gtk-3.0/settings.ini}}, {{ic|~/.gtkrc-2.0}}) are not read by other accounts, the selected theme will not apply to [[Running_X_apps_as_root|X applications run as root]]. Possible solutions include:
 +
 
 +
* Create symlinks, e.g
 +
# ln -s /home/[username]/.gtkrc-2.0 /etc/gtk-2.0/gtkrc
 +
# ln -s /home/[username]/.config/gtk-3.0/settings.ini /etc/gtk-3.0/settings.ini
 +
* Configure system-wide theme files: {{ic|/etc/gtk-3.0/settings.ini}} (GTK+ 3) or {{ic|/etc/gtk-2.0/gtkrc}} (GTK+ 2)
 +
* Adjust the theme as root
 +
# gksu lxappearance
 +
* Use a settings daemon (this is what most desktop environments do). A desktop-agnostic variant using [http://standards.freedesktop.org/xsettings-spec/xsettings-spec-0.5.html XSettings] is available in the [[AUR]] under {{aur|xsettingsd-git}}.
 +
 
 +
=== Client-side decorations ===
 +
 
 +
GTK 3.12 introduced [http://blogs.gnome.org/mclasen/2013/12/05/client-side-decorations-in-themes/ client-side decorations], which move the title-bar away from the window manager. This may present issues such as [http://redmine.audacious-media-player.org/boards/1/topics/1135 double title-bars], no title-bar at all or [https://github.com/chjj/compton/issues/189 double shadows] with compositing enabled.
 +
 
 +
To remove the shadow and gap around windows (for example in combination with a tiling window manager), create the following file:
 +
 
 +
{{hc|~/.config/gtk-3.0/gtk.css|<nowiki>.window-frame, .window-frame:backdrop {
 +
box-shadow: 0 0 0 black;
 +
border-style: none;
 +
margin: 0;
 +
border-radius: 0;
 +
}
 +
 
 +
.titlebar {
 +
border-radius: 0;
 +
}
 +
 
 +
.window-frame.csd.popup {
 +
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2), 0 0 0 1px rgba(0, 0, 0, 0.13);
 +
}
 +
 
 +
.header-bar {
 +
  background-image: none;
 +
  background-color: #ededed;
 +
  box-shadow: none;
 +
}
 +
/* You may want to use this if you don't like the double title.
 +
GtkLabel.title {
 +
    opacity: 0;
 +
}*/
 +
</nowiki>}}
 +
 
 +
To adjust the buttons in the header bar, use the {{ic|gtk-decoration-layout}} setting. [https://developer.gnome.org/gtk3/stable/GtkSettings.html#GtkSettings--gtk-decoration-layout] The below examples removes all buttons:
 +
 
 +
{{hc|~/.config/gtk-3.0/settings.ini|2=
 +
gtk-decoration-layout=menu:
 +
}}
 +
 
 +
=== cedilla ç/Ç instead of ć/Ć ===
 +
 
 +
See [https://bugs.launchpad.net/ubuntu/+source/gtk+2.0/+bug/518056], and [https://bugs.launchpad.net/ubuntu/+source/gtk+2.0/+bug/518056/comments/37] for a workaround using Xcompose (US international layout).
 +
 
 +
===Suppress warning about accessibility bus===
  
{{Note|See the [http://library.gnome.org/devel/gtk/stable/GtkSettings.html#GtkSettings.properties ''GtkSettings'' properties] in the GTK+ programming reference manual for the full list of GTK configuration options.}}
+
If you do not use any [https://wiki.gnome.org/Accessibility Gnome Accessibility] features, you may receive warnings like:
  
The purpose of this section is to collect GTK+ configuration settings which can e.g. be used within one's GTK+ configuration files.
+
WARNING **: Couldn't connect to accessibility bus:
  
There are two relevant locations for  GTK+ configuration files (which are in an ini format) : $XDG_CONFIG_HOME/gtk-3.0/ (usually ~/.config/gtk-3.0/) and /etc/gtk-3.0/. The former is reserved for user wide settings, and the latter for system wide settings.  
+
To suppress these warnings, execute programs with {{ic|1=NO_AT_BRIDGE=1}} or set that as a global [[environment variable]].
  
=== Enabling Customizable Keyboard Shortcuts ===
+
=== Titlebar background color mismatch ===
  
You can customize your GTK+ applications' keyboard shortcuts (those are called ''accelerators'' in GTK+ terminology) by hovering your mouse over a menu item and pressing your desired key combination. However, this feature is disabled by default. To enable it, set
+
If you are using a [[window manager]] which uses a window decoration theme that mimics the GTK+ theme background color, you may find that the titlebar color no longer completely matches the application color in some GTK+ 3 applications. As a workaround, create the following file:
gtk-can-change-accels = 1
+
{{hc|~/.config/gtk-3.0/gtk.css|
 +
/* Always use background color */
 +
GtkWindow {
 +
    background-color: @theme_bg_color;
 +
}
  
=== Speed up your GNOME menu ===
+
/* Fix tooltip background override */
 +
.tooltip {
 +
    background-color: rgba(0, 0, 0, 0.8);
 +
}
  
This setting controls the delay between you pointing the mouse at a menu and that menu opening in GNOME. Change this to a setting you prefer. I guess the number is in milliseconds, e.g. 250 being a quarter of a second.
+
.tooltip * {
gtk-menu-popup-delay = 0
+
    background-color: transparent;
 +
}
  
=== Reduce widget sizes ===
+
/* Fix Nautilus desktop window background override */
 +
NautilusWindow {
 +
    background-color: transparent;
 +
}
 +
}}
  
If you have a small screen or you just do not like big icons and widgets, you can resize things easily.
+
=== Wrong focus events with tiling window managers ===
To have icons without text in toolbars, use
 
gtk-toolbar-style = GTK_TOOLBAR_ICONS
 
To use smaller icons, use a line like this:
 
gtk-icon-sizes = "panel-menu=16,16:panel=16,16:gtk-menu=16,16:gtk-large-toolbar=16,16\
 
:gtk-small-toolbar=16,16:gtk-button=16,16"
 
Or to remove icons from buttons completely:
 
gtk-button-images = 0
 
You can also remove icons from menus:
 
gtk-menu-images = 0
 
  
There is some more tweaking to do in your themes gtkrc like explained [http://martin.ankerl.com/2008/10/10/how-to-make-a-compact-gnome-theme/ here] and there's another [http://gnome-look.org/content/show.php/Simple+eGTK?content=119812 theme] that does it all.
+
{{Note|1=This disables touchscreen support for GTK3 applications. [https://bugzilla.gnome.org/show_bug.cgi?id=677329#c14]}}
  
== Development ==
+
[[Define]] {{ic|1=GDK_CORE_DEVICE_EVENTS=1}} to use GTK2 style input, instead of xinput2. [https://bugzilla.gnome.org/show_bug.cgi?id=677329#c10]
  
When writing a start-from-scratch GTK+ 3 program with C, it's necessary to add CFLAGS for gcc:
+
=== Thumbnail support for GTK+ 2 file dialog ===
gcc -g -Wall `pkg-config --cflags --libs gtk+-3.0` -o base base.c
 
-g and -Wall parameters are not necessary since they are only for verbose debugging outputs.
 
You may try out the official [http://developer.gnome.org/gtk-tutorial/stable/c39.html#SEC-HELLOWORLD Hello World example].
 
  
=== Write a simple message dialog app ===
+
Install {{AUR|gtk2-patched-filechooser-icon-view}} to have the option to view files as thumbnails instead of list in the GTK+ file chooser.
You can write your own GTK+ 3 message dialog easily in many programming languages through GObject-Introspection or bindings, or you can simply use bash.
 
  
The following examples display a simple "Hello world" in a message dialog.
+
===  Button/menu icons in some apps in GNOME Wayland session ===
  
====Bash====
+
Your {{ic|~/.config/gtk-3.0/settings.ini}} file is misconfigured. This can happend if you try other GTK+ based desktop environments. These are the offending values:
*Dependency: {{Pkg|zenity}}
 
{{hc|hello_world.sh|<nowiki>#!/bin/bash
 
zenity --info --title='Hello world!' --text='This is an example dialog.'</nowiki>}}
 
  
====Boo====
+
{{hc|~/.config/gtk-3.0/settings.ini|<nowiki>[Settings]
*Dependency: {{AUR|gtk-sharp-git}} from AUR ({{Pkg|boo}})
+
gtk-button-images=1
*Makedependency:  {{Pkg|boo}}
+
gtk-menu-images=1</nowiki>}}
*Build with: {{ic|booc hello_world.boo}}
 
*Run with: {{ic|mono hello_world.exe}} (or {{ic|booi hello_world.boo}})
 
  
{{hc|hello_world.boo|<nowiki>import Gtk from "gtk-sharp"
+
Simply set them to 0 or remove the whole file to use GNOME defaults.
Application.Init()
 
Hello = MessageDialog(null, DialogFlags.Modal, MessageType.Info, ButtonsType.Close, "Hello world!")
 
Hello.SecondaryText = "This is an example dialog."
 
Hello.Run()</nowiki>}}
 
  
====C====
+
=== GTK+ 3 without polkit ===
*Dependency: {{Pkg|gtk3}} and {{Pkg|pkg-config}}
 
*Build with: {{Ic|gcc -o hello_world `pkg-config --cflags --libs gtk+-3.0` hello_world.c}}
 
{{hc|hello_world.c|<nowiki>#include <gtk/gtk.h>
 
void main (int argc, char *argv[]) {
 
gtk_init (&argc, &argv);
 
        GtkWidget *hello = gtk_message_dialog_new (NULL, GTK_DIALOG_MODAL, GTK_MESSAGE_INFO, GTK_BUTTONS_OK, "Hello world!");
 
gtk_message_dialog_format_secondary_text (GTK_MESSAGE_DIALOG (hello), "This is an example dialog.");
 
        gtk_dialog_run(GTK_DIALOG (hello));
 
}</nowiki>}}
 
  
====C++====
+
GTK+3 depends on polkit through colord, which is required for printing. However printing works fine without polkit installed; at least with a monochrome printer and package versions gtk3-print-backends=3.22.19-2 and colord=1.4.1-1.
*Dependency: {{Pkg|gtkmm3}}
 
*Build with: {{Ic|g++ -o hello_world `pkg-config --cflags --libs gtkmm-3.0` hello_world.cc}}
 
{{hc|hello_world.cc|<nowiki>#include <gtkmm/main.h>
 
#include <gtkmm/messagedialog.h>
 
int main(int argc, char *argv[]) {
 
Gtk::Main kit(argc, argv);
 
Gtk::MessageDialog Hello("Hello world!", false, Gtk::MESSAGE_INFO, Gtk::BUTTONS_OK);
 
Hello.set_secondary_text("This is an example dialog.");
 
Hello.run();
 
}</nowiki>}}
 
  
====C#====
+
=== Some GTK+ 2 themes only change the UI color palette ===
*Dependency: {{AUR|gtk-sharp-git}} from AUR
 
*Build with: {{ic|mcs -pkg:gtk-sharp-3.0 hello_world.cs}}
 
*Run with: {{ic|mono hello_world.exe}}
 
{{hc|hello_world.cs|<nowiki>using Gtk;
 
public class HelloWorld {
 
static void Main() {
 
Application.Init ();
 
MessageDialog Hello = new MessageDialog (null, DialogFlags.Modal, MessageType.Info, ButtonsType.Close, "Hello world!");
 
Hello.SecondaryText="This is an example dialog.";
 
Hello.Run ();
 
}
 
}</nowiki>}}
 
  
====Genie====
+
Depending on the theme of choice's support for GTK+ 2, UI controls may still have the default Raleigh appearance, possibly with a different color palette. This is due to these themes requiring the GTK+ 2 Murrine engine, which is missing (GTK+ 2 programs should complain about it on their standard error output). Install the {{Pkg|gtk-engine-murrine}} package.
*Dependency: {{Pkg|gtk3}}
 
*Makedependency: {{Pkg|vala}}
 
*Build with: {{Ic|valac --pkg gtk+-3.0 hello_world.gs}}
 
{{hc|hello_world.gs|<nowiki>uses
 
Gtk
 
init
 
Gtk.init (ref args)
 
var Hello=new MessageDialog (null, Gtk.DialogFlags.MODAL, Gtk.MessageType.INFO, Gtk.ButtonsType.OK, "Hello world!")
 
Hello.format_secondary_text ("This is an example dialog.")
 
Hello.run ()</nowiki>}}
 
  
====Java====
+
== Examples ==
*Dependency: {{AUR|java-gnome}} from AUR
 
*Makedependency: java-environment
 
*Build with: {{ic|mkdir HelloWorld && javac -classpath /usr/share/java/gtk.jar -d HelloWorld HelloWorld.java}}
 
*Run with: {{ic|java -classpath /usr/share/java/gtk.jar:HelloWorld HelloWorld}}
 
  
{{hc|HelloWorld.java|<nowiki>import org.gnome.gtk.Gtk;
+
GTK+ 2 configuration example:
import org.gnome.gtk.Dialog;
 
import org.gnome.gtk.InfoMessageDialog;
 
  
public class HelloWorld
+
{{hc|~/.gtkrc-2.0|2=
{
+
# GTK theme
    public static void main(String[] args) {
+
include "/usr/share/themes/Clearlooks/gtk-2.0/gtkrc"
        Gtk.init(args);
 
        Dialog Hello = new InfoMessageDialog(null, "Hello world!", "This is an example dialog.");
 
        Hello.run();
 
    }
 
}</nowiki>}}
 
  
====JavaScript====
+
# Font
*Dependencies: {{Pkg|gtk3}}, {{Pkg|gjs}} (works also with {{Pkg|seed}})
+
style "myfont" {
{{hc|hello_world.js|<nowiki>#!/usr/bin/gjs
+
    font_name = "DejaVu Sans 8"
Gtk = imports.gi.Gtk
+
}
Gtk.init(null, null)
+
widget_class "*" style "myfont"
Hello = new Gtk.MessageDialog({type: Gtk.MessageType.INFO,
+
gtk-font-name = "DejaVu Sans 8"
                              buttons: Gtk.ButtonsType.OK,
 
                              text: "Hello world!",
 
                              "secondary-text": "This is an example dialog."})
 
Hello.run()</nowiki>}}
 
  
====Perl====
+
# Icon theme
*Dependency: {{AUR|perl-gtk3}} from AUR
+
gtk-icon-theme-name = "Tango"
{{hc|hello_world.pl|<nowiki>#!/usr/bin/perl
 
use Gtk3 -init;
 
my $hello = Gtk3::MessageDialog->new (undef, 'modal', 'info', 'ok', "Hello world!");
 
$hello->set ('secondary-text' => 'This is an example dialog.');
 
$hello->run;</nowiki>}}
 
  
====Python====
+
# Toolbar style
*Dependencies: {{Pkg|gtk3}}, {{Pkg|python-gobject}}
+
gtk-toolbar-style = GTK_TOOLBAR_ICONS
{{hc|hello_world.py|<nowiki>#!/usr/bin/python
+
}}
from gi.repository import Gtk
 
Gtk.init(None)
 
Hello=Gtk.MessageDialog(None, Gtk.DialogFlags.MODAL, Gtk.MessageType.INFO, Gtk.ButtonsType.CLOSE, "Hello world!")
 
Hello.format_secondary_text("This is an example dialog.")
 
Hello.run()</nowiki>}}
 
  
====Vala====
+
GTK+ 3 example of a configuration as converted from GTK+ 2.x to GTK+ 3.x by {{Pkg|lxappearance}}:
*Dependency: {{Pkg|gtk3}}
 
*Makedependency: {{Pkg|vala}}
 
*Build with: {{Ic|valac --pkg gtk+-3.0 hello_world.vala}}
 
{{hc|hello_world.vala|<nowiki>using Gtk;
 
public class HelloWorld {
 
static void main (string[] args) {
 
Gtk.init (ref args);
 
var Hello=new MessageDialog (null, Gtk.DialogFlags.MODAL, Gtk.MessageType.INFO, Gtk.ButtonsType.OK, "Hello world!");
 
Hello.format_secondary_text ("This is an example dialog.");
 
Hello.run ();
 
}
 
}</nowiki>}}
 
  
====Visual Basic .NET====
+
{{hc|$XDG_CONFIG_HOME/gtk-3.0/settings.ini|2=
*Dependency: {{AUR|gtk-sharp-git}} from AUR
+
[Settings]
*Makedependency: {{Pkg|mono-basic}}
+
gtk-theme-name=TraditionalOk
*Build with: {{ic|vbnc -r:/usr/lib/mono/gtk-sharp-3.0/gio-sharp.dll -r:/usr/lib/mono/gtk-sharp-3.0/glib-sharp.dll -r:/usr/lib/mono/gtk-sharp-3.0/gtk-sharp.dll hello_world.vb}}
+
gtk-icon-theme-name=Fog
*Run with: {{ic|mono hello_world.exe}}
+
gtk-font-name=Luxi Sans 12
 +
gtk-cursor-theme-name=mate
 +
gtk-cursor-theme-size=24
 +
gtk-toolbar-style=GTK_TOOLBAR_BOTH_HORIZ
 +
gtk-toolbar-icon-size=GTK_ICON_SIZE_LARGE_TOOLBAR
 +
gtk-button-images=1
 +
gtk-menu-images=1
 +
gtk-enable-event-sounds=0
 +
gtk-enable-input-feedback-sounds=0
 +
gtk-xft-antialias=1
 +
gtk-xft-hinting=1
 +
gtk-xft-hintstyle=hintslight
 +
gtk-xft-rgba=rgb
 +
}}
  
{{hc|hello_world.vb|<nowiki>Imports Gtk
+
== See also ==
Public Class Hello
 
Inherits MessageDialog
 
Public Sub New
 
MyBase.New(Me, DialogFlags.Modal, MessageType.Info, ButtonsType.Close, "Hello world!")
 
Me.SecondaryText = "This is an example dialog."
 
End Sub
 
Public Shared Sub Main
 
Application.Init
 
Dim Dialog As New Hello
 
Dialog.Run
 
End Sub
 
End Class</nowiki>}}
 
  
== Resources ==
 
 
* [http://www.gtk.org/ The official GTK+ website]
 
* [http://www.gtk.org/ The official GTK+ website]
* [[wikipedia:GTK+|Wikipedia article about GTK+]]
+
* [[Wikipedia:GTK+|Wikipedia article about GTK+]]
 
* [http://developer.gnome.org/gtk-tutorial/stable/ GTK+ 2.0 Tutorial]
 
* [http://developer.gnome.org/gtk-tutorial/stable/ GTK+ 2.0 Tutorial]
 
* [http://developer.gnome.org/gtk3/stable/ GTK+ 3 Reference Manual]
 
* [http://developer.gnome.org/gtk3/stable/ GTK+ 3 Reference Manual]
 
* [http://developer.gnome.org/gtkmm-tutorial/stable/ gtkmm Tutorial]
 
* [http://developer.gnome.org/gtkmm-tutorial/stable/ gtkmm Tutorial]
 
* [http://developer.gnome.org/gtkmm/stable/ gtkmm Reference Manual]
 
* [http://developer.gnome.org/gtkmm/stable/ gtkmm Reference Manual]

Latest revision as of 20:55, 26 November 2017

From the GTK+ website:

GTK+, or the GIMP Toolkit, is a multi-platform toolkit for creating graphical user interfaces. Offering a complete set of widgets, GTK+ is suitable for projects ranging from small one-off tools to complete application suites.

GTK+, The GIMP Toolkit, was initially made by the GNU Project for the GIMP but is now a very popular toolkit with bindings for many languages. This article will explore the tools used to configure the GTK+ theme, style, icon, font and font size, and also detail manual configuration.

Installation

Two versions of GTK+ are currently available in the official repositories. They can be installed with the following packages:

  • GTK+ 3.x is available with the gtk3 package.
  • GTK+ 2.x is available with the gtk2 package.
  • GTK+ 1.x is available with the gtkAUR package.

Themes

In GTK+ 2, the default theme is Raleigh, but Arch Linux has a custom configuration file at /usr/share/gtk-2.0/gtkrc, which sets the default theme to Adwaita. In GTK+ 3, the default theme is Adwaita, but HighContrast, HighContrastInverse and Raleigh themes are also included.

To force a specific theme, you can set environment variables.

  • For GTK+ 2, use the GTK2_RC_FILES environment variable, for example:
$ GTK2_RC_FILES=/usr/share/themes/Industrial/gtk-2.0/gtkrc gimp
will launch GIMP with the Industrial theme.
  • For GTK+ 3, use the GTK_THEME environment variable, for example:
$ GTK_THEME=Adwaita:dark gnome-calculator
will launch GNOME Calculator with the dark variant of Adwaita theme.

More themes can be installed from the official repositories or the AUR.

GTK+ 2 and GTK+ 3.20 or newer are supported:

  • Adapta — An adaptive Gtk+ theme based on Material Design Guidelines. Includes: Adapta, Adapta-Eta, Adapta-Nokto, Adapta-Nokto-Eta
https://github.com/tista500/Adapta || adapta-gtk-theme
  • Arc — A flat theme with a modern look and transparent elements. Includes: Arc, Arc-Dark, Arc-Darker
https://github.com/horst3180/arc-theme || with transparency: arc-gtk-theme, without transparency: arc-solid-gtk-theme
  • Breeze — GTK+ version of KDE's default widget theme. Includes: Breeze, Breeze-Dark
https://cgit.kde.org/breeze-gtk.git || breeze-gtk
  • Deepin — Default theme for the Deepin desktop. Includes: deepin, deepin-dark
https://github.com/linuxdeepin/deepin-gtk-theme || deepin-gtk-theme
  • GNOME Standard Themes — Default themes for the GNOME desktop. Includes: Adwaita, Adwaita-dark, HighContrast
https://github.com/GNOME/gnome-themes-standard || gnome-themes-standard
  • MATE Themes — Default themes for the MATE desktop. Includes: BlackMATE, Blue-Submarine, BlueMenta, ContrastHighInverse, Green-Submarine, GreenLaguna, Menta, TraditionalGreen, TraditionalOk
https://github.com/mate-desktop/mate-themes || mate-themes
  • Numix — A flat and light theme with a modern look (GNOME, Openbox, Unity, Xfce). Includes: Numix
https://github.com/shimmerproject/Numix || numix-gtk-theme
  • Blackbird — Dark Desktop Suite for Xfce.
https://github.com/shimmerproject/Blackbird || xfce-theme-blackbirdAUR
  • Materia Theme — A Material Design-like flat theme for GTK3, GTK2, and GNOME-Shell.
https://github.com/nana-4/materia-theme || materia-themeAUR
  • Gnome-breeze — A GTK theme created to match with the new Plasma 5 Breeze.
https://github.com/dirruk1/gnome-breeze || gnome-breeze-gitAUR
  • Greybird — A grey and blue Xfce theme, used by default in Xubuntu 12.04.
https://github.com/shimmerproject/Greybird || xfce-theme-greybirdAUR
  • Vertex — Theme for GTK 3, GTK 2, Gnome-Shell and Cinnamon.
https://github.com/horst3180/vertex-theme || vertex-themesAUR
  • Zuki — Themes for GTK, gnome-shell and more.
https://github.com/lassekongo83/zuki-themes || zuki-themes-gitAUR

Only GTK+ 2 is supported:

  • GTK+ Engines — Theme engines for GTK+ 2. Includes: Clearlooks, Crux, Industrial, Mist, Redmond, ThinIce
https://github.com/GNOME/gtk-engines || gtk-engines
  • Xfce Gtk+ Engine — Xfce Gtk+-2.0 engine and themes
http://git.xfce.org/xfce/gtk-xfce-engine/ || gtk-xfce-engine
  • Oxygen-Gtk — Port of the default KDE widget theme (Oxygen) to GTK2
https://cgit.kde.org/oxygen-gtk.git || oxygen-gtk2
  • Aurora Gtk Engine — Latest member of the Clearlooks family.
http://gnome-look.org/content/show.php/Aurora+Gtk+Engine?content=56438 || gtk-engine-aurora
  • QtCurve — A configurable set of widget styles for KDE and Gtk.
https://cgit.kde.org/qtcurve.git || qtcurve-gtk2

There are a number of additional GTK+ themes in the AUR: search for gtk-theme, search for gtk2-theme.

Note: Because GTK+ 3 changes rapidly, GTK+ 3 themes often require re-working after a GTK+ 3 release. For this reason, not all GTK+ 3 themes may look as intended when used with the latest GTK+ 3 version.

GTK+ and Qt

If you have GTK+ and Qt (KDE) applications on your desktop then you know that their looks do not blend well. If you wish to make your GTK+ styles match your Qt styles please read Uniform look for Qt and GTK applications.

Configuration tools

Most major desktop environments provide tools to configure the GTK+ theme, icons, font and font size, and manage these settings via XSettings:

  • If you use Cinnamon, use Themes tool (cinnamon-settings themes): go to System Settings > Themes.
  • If you use Enlightenment: go to Settings > All > Look > Application Theme.
  • If you use GNOME, use GNOME Tweak Tool (gnome-tweak-tool): install gnome-tweak-tool.
  • If you use MATE, use the Appearance Preferences tool (mate-appearance-properties): go to System > Settings > Appearance.
  • If you use Xfce, use the Appearance tool: go to Settings > Appearance.

Other GUI tools generally overwrite the configuration files.

Both GTK+ 2 and GTK+ 3 are supported:

  • KDE GTK Configurator — Application that allows you to change style and font of GTK+ 2 and Gtk+ 3 applications.
https://cgit.kde.org/kde-gtk-config.git || kde-gtk-config
After installation, kde-gtk-config can also be found in System Settings > Application Style > GTK.
  • LXAppearance — Desktop independent GTK+ 2 and GTK+ 3 style configuration tool from the LXDE project (it does not require other parts of the LXDE desktop).
http://wiki.lxde.org/en/LXAppearance || lxappearance
  • Oo-mox — Graphical application for generating different color variations of Numix and Flat-Plat themes (GTK+ 2 and 3), Archdroid and Gnome-Colors icon themes. Also allows generating pre-scaled GTK+ 2 themes for HiDPI displays.
https://github.com/actionless/oomox || oomoxAUR

Only GTK+ 2 is supported:

  • GTK+ Change Theme — Little program that lets you change your GTK+ 2.0 theme (considered a better alternative to switch2).
http://plasmasturm.org/code/gtk-chtheme/ || gtk-chtheme
  • GTK+ Preference Tool — GTK+ theme selector and font switcher.
http://gtk-win.sourceforge.net/home/index.php/Main/GTKPreferenceTool || gtk2_prefs
  • GTK+ Theme Switch — Simple GTK+ theme switcher.
http://muhri.net/nav.php3?node=gts || gtk-theme-switch2

Configuration

GTK+ settings can be specified manually in configuration files, but desktop environments and applications can override these settings. Depending on GTK+ version, these files are located at:

  • GTK+ 2 user specific: ~/.gtkrc-2.0
  • GTK+ 2 system wide: /etc/gtk-2.0/gtkrc
  • GTK+ 3 user specific: $XDG_CONFIG_HOME/gtk-3.0/settings.ini, or $HOME/.config/gtk-3.0/settings.ini if $XDG_CONFIG_HOME is not set
  • GTK+ 3 system wide: /etc/gtk-3.0/settings.ini
Note:
  • See the GTK+ 3 GtkSettings properties (and GTK+ 2 properties) in the GTK+ programming reference manual for the full list of currently supported GTK+ configuration options.
  • Some of the settings described below (such as gtk-icon-sizes) are deprecated and ignored since GTK+ 3.10.
  • If you edit your GTK+ configuration files, only newly started applications will display the changes.

Basic theme configuration

To manually change the GTK+ theme, icons, font and font size, add the following to the configuration files, for example:

GTK+ 2:

~/.gtkrc-2.0
gtk-icon-theme-name = "Adwaita"
gtk-theme-name = "Adwaita"
gtk-font-name = "DejaVu Sans 11"

GTK+ 3:

$XDG_CONFIG_HOME/gtk-3.0/settings.ini
[Settings]
gtk-icon-theme-name = Adwaita
gtk-theme-name = Adwaita
gtk-font-name = DejaVu Sans 11
Note: The icon theme name is the name defined in the theme's index file, not the name of its directory.

Dark theme variant

Some GTK+ 3 themes contain a dark theme variant, but it's only used by default when the application requests it explicitly. To use dark theme variant with all GTK+ 3 applications, set:

gtk-application-prefer-dark-theme = true

Keyboard shortcuts

Keyboard shortcuts (otherwise known as accelerators in GTK+) may be changed by hovering the mouse over the respective menu item, and pressing the desired key combination. To enable this feature, set:

gtk-can-change-accels = 1

Emacs keybindings

To get Emacs-like keybindings in gtk apps:

For GTK2, add gtk-key-theme-name = "Emacs" to ~/.gtkrc-2.0.

For GTK3 add the following to the noted file:

~/.config/gtk-3.0/settings.ini
[Settings]
gtk-key-theme-name = Emacs

Then run:

$ gsettings set org.gnome.desktop.interface gtk-key-theme "Emacs"

XFCE has a similar setting:

$ xfconf-query -c xsettings -p /Gtk/KeyThemeName -s Emacs

The config files in /usr/share/themes/Emacs/ determine what the Emacs bindings are, and can be changed. Copying sections to the users ~/.gtkrc-2.0 file allows for changes on a per user basis.

GNOME menu delay

This setting controls the delay between pointing the mouse at a menu and that menu opening. This delay is measured in milliseconds.

gtk-menu-popup-delay = 0

Reduce widget sizes

If you have a small screen or you just do not like big icons and widgets, you can resize things easily.

To have icons without text in toolbars (valid values), use

gtk-toolbar-style = GTK_TOOLBAR_ICONS

To use smaller icons, use a line like this:

gtk-icon-sizes = "panel-menu=16,16:panel=16,16:gtk-menu=16,16:gtk-large-toolbar=16,16\
:gtk-small-toolbar=16,16:gtk-button=16,16"

Or to remove icons from buttons completely:

gtk-button-images = 0

You can also remove icons from menus:

gtk-menu-images = 0

See also [1] and [2].

File-Chooser Startup-Location

Open the file-chooser within the current-working-directory and not the recent location. Normally the current-working-directory is home-directory.

GTK+ 3

Modify DConf with gsettings, as the database file ($XDG_CONFIG_HOME/dconf/users) is binary:

$ gsettings set org.gtk.Settings.FileChooser startup-mode cwd

GTK+ 2

Modify ~/.config/gtk-2.0/gtkfilechooser.ini configuration file:

~/.config/gtk-2.0/gtkfilechooser.ini
StartupMode=cwd

Legacy scrolling behavior

Note: This setting is not obeyed by all GTK+ applications.
Tip: Legacy scrolling behaviour can be achieved reliably simply by using right click instead of left click.

Prior to GTK+ 3.6, clicking on either side of the slider in the scrollbar would move the scrollbar in the direction of the click by approximately one page. Since GTK+ 3.6, the slider will move directly to the position of the click. This behaviour can be reverted in some applications by creating the file with the content below:

~/.config/gtk-3.0/settings.ini
[Settings]
gtk-primary-button-warps-slider = false

Disable overlay scrollbars

Since GTK+ 3.15, overlay scrollbars are enabled by default, meaning that scrollbars will be shown only on mouseover in GTK+ 3 applications. This behavior can be reverted by setting the following environment variable: GTK_OVERLAY_SCROLLING=0.

See Environment variables#Graphical applications.

Remove overlay scroll indicators

The positions of the overlay scrollbars are indicated by thin dashed lines in the application window. These dashed lines will be present even when overlay scrolling is disabled using the environment variable discussed in the section above. To remove the indicator lines, create the following file:

~/.config/gtk-3.0/gtk.css
/* Remove dotted lines from GTK+ 3 applications */
undershoot.top, undershoot.right, undershoot.bottom, undershoot.left { background-image: none; }

GDK backends

GDK (the underlying abstraction layer of GTK+) supports multiple backends to display GTK+ applications. The default backend is x11.

Broadway backend

The GDK Broadway backend provides support for displaying GTK+ applications in a web browser, using HTML5 and web sockets. [3]

When using broadwayd, specify the display number to use, prefixed with a colon, similar to X. The default display number is 1.

$ display_number=:5

Start it.

$ broadwayd $display_number 

Port Used on default

port = 8080 + $display_number

Point your browser to http://127.0.0.1:port

To Start apps

$ GDK_BACKEND=broadway BROADWAY_DISPLAY=$display_number <<app>>

Alternatively can set address and port

$ broadwayd --port $port_number --address $address $display_number

Wayland backend

The GDK Wayland backend can be enabled by setting the GDK_BACKEND=wayland environment variable.

Tip: To disable GTK window decorations in Wayland, install the gtk3-optional-csdAUR package and set the environment variable GTK_CSD=0.

Troubleshooting

Different themes between GTK+ 2 and GTK+ 3 applications

In general, if a selected theme has support for both GTK+ 2 and GTK+ 3, the theme will be applied to all GTK+ 2 and GTK+ 3 applications. If a selected theme has support for only GTK+ 2, it will be used for GTK+ 2 applications and the default GTK+ theme will be used for GTK+ 3 applications. If the selected theme has support for only GTK+ 3, it will be used for GTK+ 3 applications and the default GTK+ theme will be used for GTK+ 2 applications. Thus for application theme consistency, it is best to use a theme which has support for both GTK+ 2 and GTK+ 3.

You could find what themes installed on your system have both an GTK+ 2 and GTK+ 3 version by using this command (does not work with names containing spaces):

find $(find ~/.themes /usr/share/themes/ -wholename "*/gtk-3.0" | sed -e "s/^\(.*\)\/gtk-3.0$/\1/") -wholename "*/gtk-2.0" | sed -e "s/.*\/\(.*\)\/gtk-2.0/\1"/

Theme not applied to root applications

As user theme files ($XDG_CONFIG_HOME/gtk-3.0/settings.ini, ~/.gtkrc-2.0) are not read by other accounts, the selected theme will not apply to X applications run as root. Possible solutions include:

  • Create symlinks, e.g
# ln -s /home/[username]/.gtkrc-2.0 /etc/gtk-2.0/gtkrc
# ln -s /home/[username]/.config/gtk-3.0/settings.ini /etc/gtk-3.0/settings.ini
  • Configure system-wide theme files: /etc/gtk-3.0/settings.ini (GTK+ 3) or /etc/gtk-2.0/gtkrc (GTK+ 2)
  • Adjust the theme as root
# gksu lxappearance
  • Use a settings daemon (this is what most desktop environments do). A desktop-agnostic variant using XSettings is available in the AUR under xsettingsd-gitAUR.

Client-side decorations

GTK 3.12 introduced client-side decorations, which move the title-bar away from the window manager. This may present issues such as double title-bars, no title-bar at all or double shadows with compositing enabled.

To remove the shadow and gap around windows (for example in combination with a tiling window manager), create the following file:

~/.config/gtk-3.0/gtk.css
.window-frame, .window-frame:backdrop {
 box-shadow: 0 0 0 black;
 border-style: none;
 margin: 0;
 border-radius: 0;
}

.titlebar {
 border-radius: 0;
}

.window-frame.csd.popup {
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2), 0 0 0 1px rgba(0, 0, 0, 0.13);
}

.header-bar {
  background-image: none;
  background-color: #ededed;
  box-shadow: none;
}
/* You may want to use this if you don't like the double title.
GtkLabel.title {
    opacity: 0;
}*/

To adjust the buttons in the header bar, use the gtk-decoration-layout setting. [4] The below examples removes all buttons:

~/.config/gtk-3.0/settings.ini
gtk-decoration-layout=menu:

cedilla ç/Ç instead of ć/Ć

See [5], and [6] for a workaround using Xcompose (US international layout).

Suppress warning about accessibility bus

If you do not use any Gnome Accessibility features, you may receive warnings like:

WARNING **: Couldn't connect to accessibility bus:

To suppress these warnings, execute programs with NO_AT_BRIDGE=1 or set that as a global environment variable.

Titlebar background color mismatch

If you are using a window manager which uses a window decoration theme that mimics the GTK+ theme background color, you may find that the titlebar color no longer completely matches the application color in some GTK+ 3 applications. As a workaround, create the following file:

~/.config/gtk-3.0/gtk.css
/* Always use background color */
GtkWindow {
    background-color: @theme_bg_color;
}

/* Fix tooltip background override */
.tooltip {
    background-color: rgba(0, 0, 0, 0.8);
}

.tooltip * {
    background-color: transparent;
}

/* Fix Nautilus desktop window background override */
NautilusWindow {
     background-color: transparent; 
}

Wrong focus events with tiling window managers

Note: This disables touchscreen support for GTK3 applications. [7]

Define GDK_CORE_DEVICE_EVENTS=1 to use GTK2 style input, instead of xinput2. [8]

Thumbnail support for GTK+ 2 file dialog

Install gtk2-patched-filechooser-icon-viewAUR to have the option to view files as thumbnails instead of list in the GTK+ file chooser.

Button/menu icons in some apps in GNOME Wayland session

Your ~/.config/gtk-3.0/settings.ini file is misconfigured. This can happend if you try other GTK+ based desktop environments. These are the offending values:

~/.config/gtk-3.0/settings.ini
[Settings]
gtk-button-images=1
gtk-menu-images=1

Simply set them to 0 or remove the whole file to use GNOME defaults.

GTK+ 3 without polkit

GTK+3 depends on polkit through colord, which is required for printing. However printing works fine without polkit installed; at least with a monochrome printer and package versions gtk3-print-backends=3.22.19-2 and colord=1.4.1-1.

Some GTK+ 2 themes only change the UI color palette

Depending on the theme of choice's support for GTK+ 2, UI controls may still have the default Raleigh appearance, possibly with a different color palette. This is due to these themes requiring the GTK+ 2 Murrine engine, which is missing (GTK+ 2 programs should complain about it on their standard error output). Install the gtk-engine-murrine package.

Examples

GTK+ 2 configuration example:

~/.gtkrc-2.0
# GTK theme
include "/usr/share/themes/Clearlooks/gtk-2.0/gtkrc"

# Font
style "myfont" {
    font_name = "DejaVu Sans 8"
}
widget_class "*" style "myfont"
gtk-font-name = "DejaVu Sans 8"

# Icon theme
gtk-icon-theme-name = "Tango"

# Toolbar style
gtk-toolbar-style = GTK_TOOLBAR_ICONS

GTK+ 3 example of a configuration as converted from GTK+ 2.x to GTK+ 3.x by lxappearance:

$XDG_CONFIG_HOME/gtk-3.0/settings.ini
[Settings] 
gtk-theme-name=TraditionalOk
gtk-icon-theme-name=Fog
gtk-font-name=Luxi Sans 12
gtk-cursor-theme-name=mate
gtk-cursor-theme-size=24
gtk-toolbar-style=GTK_TOOLBAR_BOTH_HORIZ
gtk-toolbar-icon-size=GTK_ICON_SIZE_LARGE_TOOLBAR
gtk-button-images=1
gtk-menu-images=1
gtk-enable-event-sounds=0
gtk-enable-input-feedback-sounds=0
gtk-xft-antialias=1
gtk-xft-hinting=1
gtk-xft-hintstyle=hintslight
gtk-xft-rgba=rgb

See also