Better QT and GTK theming

flake.nix

@@ -106,6 +106,13 @@
       url = "github:ocf/jukebox-django";
       inputs.nixpkgs.follows = "nixpkgs";
     };
+
+    nixpkgs-unstable = {
+      type = "github";
+      owner = "nixos";
+      repo = "nixpkgs";
+      ref = "nixos-unstable";
+    };
   };
 
   outputs =

modules/graphical/default.nix

@@ -107,6 +107,13 @@ in
         # Conflict override since multiple DEs set this option
         programs.ssh.askPassword = pkgs.lib.mkForce (lib.getExe pkgs.ksshaskpass.out);
 
+        xdg.portal = {
+          enable = true;
+          extraPortals = with pkgs; [
+            xdg-desktop-portal-gtk
+          ];
+        };
+
         environment.systemPackages = with pkgs; [
           catppuccin-sddm
 
@@ -125,6 +132,13 @@ in
 
           # OCF IRC
           halloy
+
+          # Themes
+          adw-gtk3
+          libsForQt5.qt5ct
+          kdePackages.qt6ct
+          adwaita-qt
+          adwaita-qt6
         ];
 
         fonts.packages = with pkgs; [
@@ -133,6 +147,18 @@ in
           noto-fonts-cjk-sans
         ];
 
+        environment.sessionVariables = {
+          QT_QPA_PLATFORMTHEME = "qt5ct";
+        };
+
+        programs.dconf.enable = true;
+
+        programs.firefox = {
+          preferences = {
+            "widget.gtk.libadwaita-colors.enabled" = false;
+          };
+        };
+
         services = {
           desktopManager.cosmic = {
             enable = true;
@@ -224,6 +250,8 @@ in
             COSMIC_THEME_FILE="$HOME/.config/cosmic/com.system76.CosmicTheme.Mode/v1/is_dark"
             COSMIC_BG_FILE="$HOME/.config/cosmic/com.system76.CosmicBackground/v1/all"
             OCF_THEME_FILE="$HOME/remote/.config/ocf/theme"
+            QT5CT_THEME_FILE="$HOME/.config/qt5ct/qt5ct.conf"
+            QT6CT_THEME_FILE="$HOME/.config/qt6ct/qt6ct.conf"
 
             sync_theme() {
               if [ -f "$COSMIC_THEME_FILE" ]; then
@@ -233,16 +261,31 @@ in
                   echo "dark" > "$OCF_THEME_FILE"
                   sed -i -E 's/bg-(light|dark)/bg-dark/g' $COSMIC_BG_FILE
                   sed -i 's/theme = "rose-pine-dawn"/theme = "rose-pine"/' $HOME/.config/halloy/config.toml
+                  # QT Themes
+                  sed -i 's/^style=.*/style=Adwaita-Dark/' $QT5CT_THEME_FILE
+                  sed -i 's/^style=.*/style=Adwaita-Dark/' $QT6CT_THEME_FILE
                 else
                   echo "light" > "$OCF_THEME_FILE"
                   sed -i -E 's/bg-(light|dark)/bg-light/g' $COSMIC_BG_FILE
                   sed -i 's/theme = "rose-pine"/theme = "rose-pine-dawn"/' $HOME/.config/halloy/config.toml
+                  # QT Themes
+                  sed -i 's/^style=.*/style=Adwaita/' $QT5CT_THEME_FILE
+                  sed -i 's/^style=.*/style=Adwaita/' $QT6CT_THEME_FILE
                 fi
                 pkill -USR1 halloy || true
               fi
             }
 
             # Initial sync
+            if [ -f "$OCF_THEME_FILE" ]; then
+              ocf_theme=$(cat "$OCF_THEME_FILE")
+              mkdir -p "$(dirname "$COSMIC_THEME_FILE")"
+              if [ "$ocf_theme" = "dark" ]; then
+                echo "true" > "$COSMIC_THEME_FILE"
+              elif [ "$ocf_theme" = "light" ]; then
+                echo "false" > "$COSMIC_THEME_FILE"
+              fi
+            fi
             sync_theme
 
             # Watch for changes

modules/graphical/skel/.config/cosmic/com.system76.CosmicTk/v1/apply_theme_global

@@ -0,0 +1 @@
+true

modules/graphical/skel/.config/qt5ct/qt5ct.conf

@@ -0,0 +1,4 @@
+[Appearance]
+icon_theme=Cosmic
+standard_dialogs=gtk3
+style=Adwaita-Dark

modules/graphical/skel/.config/qt6ct/qt6ct.conf

@@ -0,0 +1,4 @@
+[Appearance]
+icon_theme=Cosmic
+standard_dialogs=gtk3
+style=Adwaita-Dark