Can I apply a different GTK3 theme from the main one to an individual application?
Solution 1
You can use the GTK environment variable GTK_THEME=elementary
to launch an app with the elementary theme. For example, running GTK_THEME=elementary pantheon-files
will launch the elementary Files app using the elementary GTK theme.
To get this to apply every time you launch a specific app, your best option is likely to create a custom .desktop file (launcher).
Create a custom .desktop file
- Open your file browser
- Navigate to
/usr/share/applications/
- Copy the launcher (highlight and Ctrl+C) for the app you want to launch with the elementary theme
- Navigate to
~/.local/share/applications/
and paste the launcher (Ctrl+V) - Right-click and open the launcher with a text editor
- Modify the line starting with
Exec=
to includeExec=env GTK_THEME=elementary
and then the previous existing contents of the line. (SoExec=pantheon-files
would becomeExec=env GTK_THEME=elementary pantheon-files
) - Save and close the file
The next time you launch the app from Unity (or your app launcher of choice) it will use the elementary theme.
Bonus: make it work when using command line
You may also want the app to launch with the elementary theme when launching it from the command line. To do so:
- Open your Terminal app
- Type
alias pantheon-files="GTK_THEME=elementary pantheon-files"
(replacingpantheon-files
with the desired app) - Press Enter
Caveats:
- This will not change your window manager's theme to the elementary theme.
- This (by design) will only apply to your account, not root or anyone else on the machine.
- The theme names are cAsE-sEnsItiVe and should be matched with the theme folder name.
Sources:
- I'm an elementary contributor ;)
- GTK+ 3 Reference Manual: Running GTK+ Applications
- Set variable in .desktop file
Solution 2
The question is still valid and I found a way:
-
create any folder
path/to/MY_FOLDER
-
create a
/share/themes/
folder inside it (that ispath/to/MY_FOLDER/share/themes
). -
put any GTK3 theme inside the latter
-
rename the theme to the name of the CURRENTLY ACTIVE THEME.
At last, this command will make an app use the renamed theme instead of the currently active one:
GTK_DATA_PREFIX=path/to/MY_FOLDER YOUR_APPLICATON
(The path after GTK_DATA_PREFIX=
has to be that (and only that) to the folder that contains /share/themes/RENAMED_THEME
. That's why it's NOT path/to/MY_FOLDER/share/themes/RENAMED_THEME
, but just path/to/MY_FOLDER
.)
To have that inside a launcher, replace accordingly:
Exec=sh -c 'GTK_DATA_PREFIX=path/to/MY_FOLDER YOUR_APPLICATION'
Solution 3
Its certainly possible, I don't have much of themeing experience, but when you navigate to /usr/share/themes/*Theme Name*/gtk-3.0/apps/
directory, you'll find .css
files, named with apps they target to theme, so yes you can create app-specific Themes.
Note that the way you mentioned to theme your apps may require some work to be done (like having both Ambiance and Elementary work simultaneously, since every theme has a base file on top of which app specific styling is done, (a file gtkrc
in Gtk 2.0 while, a file gtk.css
in case of Gtk3.0).
And this base theme file contains styling rules that specifically target the given theme, hence you cannot create Elementary like look and feel from Ambiance's base theme file without making some heavy changes, and even if you do, you'll loose Ambiance look itself.
Also, in GNOME, it is possible to have only single theme applied at a time, For Example, if you have used Appearance window in Ubuntu 12.04, you know can can select any single theme from the dropdown, in case you have used gnome-tweak-tool
, than you can set different themes, for Gtk, Window frames, and icons, but still, it doesn't allow to target specific applications to theme, so as I said earlier, you can set totally different themes for different applications if you cleverly work with base theme file, as of now, no third party applications can do it by itself.
One way you can do it by yourself is that, let the base theme file (gtk.css
) have only essential rules which are neutral to any theme, being dark or light. And have the actual theme design written in app-specific files that reside in above mentioned directory, i.e. for styling Nautilus, you can write all required properties in nautilus.css
file. Same with every app you wish to target. Obviously, doing such requires some decent Gtk themeing experience.
You may refer this for creating your own theme using template, Also there's a decent documentation on Gtk+ themeing.
Solution 4
Yes, the simple way is to point the application at the required path where your rc file lives, in the command that runs your application:
GTK2_RC_FILES=/usr/share/themes/Redmond/gtk-2.0/gtkrc inkscape
This on 12.04 for inkscape (which is still Gnome2 btw) produces this:
See more information about Gtk2 theme running here.
Solution 5
Yes you can, actually I googled and got some answers:
- Look for the exact executable for the program you want to change the theme. For example, if you want it for ooffice then type
which ooffice
in the terminal. - Look for the bin folder where all applications put their binary executables. Type
echo $PATH
in the terminal and you will ge the path. I recommend you to create a bin folder in your home directory by typingmkdir ~/bin
- Type
gedit ~/.bashrc
to open your bash rc file. - Go to the bottom of this file and add this line
export PATH=~/bin:${PATH}
Now we will create a script which will execute your program with custom theme:
- Create application's script file by typing:
gedit ~/bin/ooffice
-
Type these lines in the opened file:
#!/bin/bash env GTK2_RC_FILES=/usr/share/themes/SlicknessX/gtk-2.0/gtkrc /usr/bin/ooffice "$@"
Change the mode of the file to executable by typing:
chmod +x ~/bin/ooffice
.
Hope this helps, you have to remember only one thing, the format of the script as shown below:
#!/bin/bash
env GTK2_RC_FILES=PATH_TO_GTKRC PATH_TO_EXECUTABLE "$@"
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matt
Updated on September 18, 2022Comments
-
matt almost 2 years
For example, can I keep Ambiance as main theme but assign elementary theme to elementary's app?
-
neonboy about 12 yearsCurrent answers ara about Gtk2, I am asking about Gtk3.
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ish about 12 yearsI edited the question to better reflect what you seek. Sorry, but the short answer from my research is no, you cannot without having to spend some effort creating a new "hybrid" theme as @Kush explained :( It's not as simple as GTK2 any more.
-
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ish about 12 yearsIt is certainly possible for GTK2 apps using GTK2_RC_FILES env. variable. Also, what themes are you talking about compiling? The question is about systemwide GTK themes available in Ubuntu.
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Marceau about 12 yearsI believe the method you mentioned targets Gtk2.0 while Ubuntu 12.04 uses Gtk3.0 for themes, so if might not work.
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neonboy about 12 yearsI'm sorry, that's a solution for Gtk2, question is about Gtk3.
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neonboy about 12 yearsI don't want to create a new theme, I want to assign an existing one.
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Marceau about 12 years@neonboy: As I said that with GTK3, its not that simple, a theme is distributed across multiple files, and if dependencies are not satisfied, broken theme is all you'll get. That's why I posted the answer that shows possible solution with GTK3, and not GTK2 (in which doing this is fairly easier).
-
Martin Owens -doctormo- about 12 yearsYou didn't specify that in your original question. Please no antagonise the questioneers.
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neonboy about 12 yearsOriginally it was "Can I use different GTK3 themes for individual apps?" wich still had Gtk3 subject in the question, then foss freedom ask me to comment on non valid answers and edit the question if it was necessary, I'm not antagonise anyone.
-
Redsandro about 10 yearsNice reply but I cannot get this to work for any theme. Can you give an example using terminal,
find /usr/share/themes -type d -name 'gtk-3.0' | awk -F'/' '{print $5}'
andgedit
for demonstration purposes? E.g.GTK_THEME="HighContrast" gedit
orenv GTK_THEME="HighContrast" gedit
orGTK_THEME=Adwaita:dark gedit
... nothing. -
Drew Chapin almost 10 yearsI just changed it in
/usr/share/applications/<appname>.desktop
and it worked for me. -
Has QUIT--Anony-Mousse almost 10 yearsAny way to do this from code inside the app?
-
runDOSrun over 7 yearswhich file/folder exactly do we point to using
GTK_DATA_PREFIX
? -
Cedric Reichenbach almost 7 yearsIt's worth noting that theme names are case sensitive.
-
Admin over 6 yearsThis works for some apps but not for all.
-
Admin over 6 yearsThis was rather confusing, but I have figured it out and edited the answer.
-
Admin over 6 yearsAnother way is to put the app-specific renamed theme in
~/.themes
(the current active has to be in/usr/share/themes
) and then use some pathGTK_DATA_PREFIX=path/to/nowhere
to launch that app, which will reset the app theme to the current one, only it will look first in~/.themes
and take the one with the same name there. -
Admin over 6 years@runDOSrun - the path after
GTK_DATA_PREFIX=
has to be that (and only that) to the folder that contains/share/themes/RENAMED_THEME
. That's why it's NOTFOLDER/share/themes/RENAMED_THEME
, but justFOLDER
. -
Admin over 6 yearscan we do something similar in relation to the icon theme?
-
Scindix over 5 yearsAlso it's worth mentioning that the env variable
GTK_THEME
works with actual paths. So if you want tons of different variations of the same theme for different applications, but don't want them all to show up at your global theme selector tool you may create a second folder (e.g. ~/.themes-apps) and use something likeGTK_THEME=../.themes-apps/elementary-mint-green
. -
AlphaLife about 3 years+1 Works for codeblocks running in ubuntu 20.04 using adwaita theme. Orchis light theme had messed up my codeblocks colours.
-
Евгений Крамаров over 2 yearsFor apps that use QT5, as a GUI framework instead of
env GTK_THEME=<ThemeName>
useenv QT_QPA_PLATFORMTHEME=<ThemeName>
. It requiresqt5-style-plugins
apt package to be installed -
Admin about 2 yearsI tried this and thought it was not working, but it turns out I had already got an instance of the app working (in this case meld), and it only worked after I ran
sudo killall meld
before running the command again from the CLI. E.g.GTK_THEME="Adwaita" meld
.