nixdots/home/themes/qt.nix

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{
pkgs,
lib,
osConfig,
...
}: let
inherit (lib) mkIf mkMerge;
cfg = osConfig.myOptions.home-manager.theme.qt;
in {
qt = {
enable = true;
platformTheme.name = mkIf cfg.forceGtk "gtk"; # just an override for QT_QPA_PLATFORMTHEME, takes "gtk", "gnome", "qtct" or "kde"
style = mkIf (!cfg.forceGtk) {
name = cfg.theme.name;
package = cfg.theme.package;
};
};
home = {
packages = with pkgs;
mkMerge [
[
# libraries and programs to ensure that qt applications load without issue
# breeze-icons is added as a fallback
libsForQt5.qt5ct
kdePackages.qt6ct
breeze-icons
]
(mkIf cfg.forceGtk [
# libraries to ensure that "gtk" platform theme works
# as intended after the following PR:
# <https://github.com/nix-community/home-manager/pull/5156>
libsForQt5.qtstyleplugins
qt6Packages.qt6gtk2
])
];
sessionVariables = {
# scaling - 1 means no scaling
QT_AUTO_SCREEN_SCALE_FACTOR = "1";
# use wayland as the default backend, fallback to xcb if wayland is not available
QT_QPA_PLATFORM = "wayland;xcb";
# disable window decorations everywhere
QT_WAYLAND_DISABLE_WINDOWDECORATION = "1";
# remain backwards compatible with qt5
DISABLE_QT5_COMPAT = "0";
# tell calibre to use the dark theme, because the light one hurts my eyes
CALIBRE_USE_DARK_PALETTE = "1";
};
};
}