{ config, lib, pkgs, ... }: with lib; let cfg = config.qt; # Maps known lowercase style names to style packages. Non-exhaustive. stylePackages = with pkgs; { bb10bright = libsForQt5.qtstyleplugins; bb10dark = libsForQt5.qtstyleplugins; cleanlooks = libsForQt5.qtstyleplugins; gtk2 = libsForQt5.qtstyleplugins; motif = libsForQt5.qtstyleplugins; cde = libsForQt5.qtstyleplugins; plastique = libsForQt5.qtstyleplugins; adwaita = adwaita-qt; adwaita-dark = adwaita-qt; adwaita-highcontrast = adwaita-qt; adwaita-highcontrastinverse = adwaita-qt; breeze = libsForQt5.breeze-qt5; }; in { meta.maintainers = [ maintainers.rycee ]; imports = [ (mkChangedOptionModule [ "qt" "useGtkTheme" ] [ "qt" "platformTheme" ] (config: if getAttrFromPath [ "qt" "useGtkTheme" ] config then "gtk" else null)) ]; options = { qt = { enable = mkEnableOption "Qt 4 and 5 configuration"; platformTheme = mkOption { type = types.nullOr (types.enum [ "gtk" "gnome" ]); default = null; example = "gnome"; relatedPackages = [ "qgnomeplatform" [ "libsForQt5" "qtstyleplugins" ] ]; description = '' Platform theme to use for Qt applications.</para> <para>The options are <variablelist> <varlistentry> <term><literal>gtk</literal></term> <listitem><para>Use GTK theme with <link xlink:href="https://github.com/qt/qtstyleplugins">qtstyleplugins</link> </para></listitem> </varlistentry> <varlistentry> <term><literal>gnome</literal></term> <listitem><para>Use GNOME theme with <link xlink:href="https://github.com/FedoraQt/QGnomePlatform">qgnomeplatform</link> </para></listitem> </varlistentry> </variablelist> ''; }; style = { name = mkOption { type = types.nullOr types.str; default = null; example = "adwaita-dark"; relatedPackages = [ "adwaita-qt" [ "libsForQt5" "qtstyleplugins" ] ]; description = '' Style to use for Qt5 applications. Case-insensitive. </para> <para>Some examples are <variablelist> <varlistentry> <term><literal>adwaita</literal></term> <term><literal>adwaita-dark</literal></term> <term><literal>adwaita-highcontrast</literal></term> <term><literal>adwaita-highcontrastinverse</literal></term> <listitem><para>Use the Adwaita style from <link xlink:href="https://github.com/FedoraQt/adwaita-qt">adwaita</link> </para></listitem> </varlistentry> <varlistentry> <term><literal>breeze</literal></term> <listitem><para>Use the Breeze style from <link xlink:href="https://github.com/KDE/breeze">breeze</link> </para></listitem> </varlistentry> <varlistentry> <term><literal>bb10bright</literal></term> <term><literal>bb10dark</literal></term> <term><literal>cde</literal></term> <term><literal>cleanlooks</literal></term> <term><literal>gtk2</literal></term> <term><literal>motif</literal></term> <term><literal>plastique</literal></term> <listitem><para>Use styles from <link xlink:href="https://github.com/qt/qtstyleplugins">qtstyleplugins</link> </para></listitem> </varlistentry> </variablelist> ''; }; package = mkOption { type = types.nullOr types.package; default = null; example = literalExpression "pkgs.adwaita-qt"; description = '' Theme package to be used in Qt5 applications. Auto-detected from <option>qt.style.name</option> if possible. ''; }; }; }; }; config = mkIf (cfg.enable && cfg.platformTheme != null) { assertions = [{ assertion = cfg.platformTheme == "gnome" -> cfg.style.name != null && cfg.style.package != null; message = '' `qt.platformTheme` "gnome" must have `qt.style` set to a theme that supports both Qt and Gtk, for example "adwaita", "adwaita-dark", or "breeze". ''; }]; qt.style.package = mkIf (cfg.style.name != null) (mkDefault (stylePackages.${toLower cfg.style.name} or null)); # Necessary because home.sessionVariables doesn't support mkIf home.sessionVariables = filterAttrs (n: v: v != null) { QT_QPA_PLATFORMTHEME = if cfg.platformTheme == "gnome" then "gnome" else "gtk2"; QT_STYLE_OVERRIDE = cfg.style.name; }; home.packages = if cfg.platformTheme == "gnome" then [ pkgs.qgnomeplatform ] ++ lib.optionals (cfg.style.package != null) [ cfg.style.package ] else [ pkgs.libsForQt5.qtstyleplugins ]; xsession.importedVariables = [ "QT_QPA_PLATFORMTHEME" ] ++ lib.optionals (cfg.style.name != null) [ "QT_STYLE_OVERRIDE" ]; # Enable GTK+ style for Qt4 in either case. # It doesn’t support the platform theme packages. home.activation.useGtkThemeInQt4 = hm.dag.entryAfter [ "writeBoundary" ] '' $DRY_RUN_CMD ${pkgs.crudini}/bin/crudini $VERBOSE_ARG \ --set "${config.xdg.configHome}/Trolltech.conf" Qt style GTK+ ''; }; }