Update theme

modules/desktop/themes/qt.nix

@@ -2,24 +2,53 @@
 
 with lib;
 with lib.my;
-let cfg = config.modules.desktop.themes.qt;
+let
+  cfg = config.modules.desktop.themes.qt;
+
+  sddmBackground = pkgs.fetchurl {
+    url =
+      "https://raw.githubusercontent.com/AngelJumbo/gruvbox-wallpapers/main/wallpapers/irl/mountains2.jpg";
+    sha256 = "sha256-hp9cxCpZsDYKxUUSuec2wZyv9/N93Cw6ENTHGxKap9Q=";
+  };
+
+  sddmTheme = pkgs.stdenv.mkDerivation {
+    name = "sddm-theme";
+    src = pkgs.fetchFromGitHub {
+      owner = "MarianArlt";
+      repo = "sddm-sugar-dark";
+      rev = "ceb2c455663429be03ba62d9f898c571650ef7fe";
+      sha256 = "0153z1kylbhc9d12nxy9vpn0spxgrhgy36wy37pk6ysq7akaqlvy";
+    };
+    installPhase = ''
+      mkdir -p $out
+      cp -R ./* $out/
+      cd $out/
+      rm Background.jpg
+      cp -r ${sddmBackground} $out/Background.jpg
+    '';
+  };
+
 in {
   options.modules.desktop.themes.qt = { enable = mkBoolOpt false; };
 
   config = mkIf cfg.enable {
+    services.xserver.displayManager.sddm.theme = "${sddmTheme}";
+
+    environment.systemPackages = with pkgs; [
+      libsForQt5.qt5.qtquickcontrols2
+      libsForQt5.qt5.qtgraphicaleffects
+    ];
+
     home-manager.users.${config.user.name} = {
 
-      xdg.configFile = {
-        "Kvantum/kvantum.kvconfig" = { text = "theme=Gruvbox-Dark-Blue"; };
-
-        "Kvantum/Gruvbox-Dark-Blue" = {
-          source = "${inputs.gruvbox-kvantum-theme}/Gruvbox-Dark-Blue";
+      qt = {
+        enable = true;
+        platformTheme = "gtk";
+        style = {
+          name = "adwaita-dark";
+          package = pkgs.unstable.adwaita-qt;
         };
       };
-
-      home.sessionVariables = { QT_STYLE_OVERRIDE = "kvantum-dark"; };
-
-      home.packages = with pkgs.unstable; [ libsForQt5.qtstyleplugin-kvantum ];
     };
   };
 }