Added basic GTK theming support.

Still need to add:

  1. Icons
  2. Cursor
  3. Fallbacks

modules/profiles/graphical.nix

@@ -5,6 +5,7 @@
     ../cli.nix
     ../fonts.nix
     ../sway.nix
+    ../system/gtk.nix
     ./minimal.nix
   ];
 

modules/system/gtk.nix

@@ -0,0 +1,18 @@
+{ config, pkgs, ... }: {
+  home-manager.users.james = {
+    home.packages = with pkgs; [ dracula-theme ];
+    home.sessionVariables = { GTK_THEME = "Dracula"; };
+
+    xdg.configFile."gtk-3.0/settings.ini".text = ''
+      [Settings]
+      gtk-theme-name=Dracula
+      #gtk-icon-theme-name=
+      #gtk-cursor-theme-name=
+      gtk-fallback-icon-theme=gnome
+      gtk-application-prefer-dark-theme=true
+      gtk-xft-hinting=1
+      gtk-xft-hintstyle=hintfull
+      gtk-xft-rgba=none
+    '';
+  };
+}