From 47afdc46275834f3d6ecb0021dbdda9b77f3729d Mon Sep 17 00:00:00 2001 From: Jan Tojnar Date: Sun, 29 Aug 2021 02:28:38 +0200 Subject: nixos/gnome: enable platform integration for Qt Qt links against GTK to be able to use native GTK file chooser in GTK-oriented DEs. However, GTK expects a specific environment, which means the application needs to be wrapped to prevent crashes when file chooser is opened in some environments. This patch bypasses the need for wrapping Qt applications with GTK-related environment since the file chooser dialogue will now come from a separate process (instantiated by the XDG desktop portal via D-Bus). In the future, we could remove the GTK dependency from Qt to fix the crashes on non-{GNOME,Pantheon} environments. Then, users would be able to choose between non-native Qt dialogue or native one facilitated by XDG portals (e.g. through setting `QT_QPA_PLATFORMTHEME` to either `qgnomeplatform`, or `xdgdesktopportal`). One disadvantage is adding a Qt dependency to GNOME, even for people who might not use any Qt apps. But they can easily just add `qt5.enable = false;` to their NixOS configuration. The configuration is also presumably less battle tested than plain Qt with its first-party GTK integration. But it is backed by Fedora and used by Manjaro GNOME so it cannot be that bad. Lastly, I worry about ABI compatibility of the platform modules with apps installed from different Nixpkgs revision. --- nixos/doc/manual/from_md/release-notes/rl-2111.section.xml | 9 +++++++++ nixos/doc/manual/release-notes/rl-2111.section.md | 2 ++ nixos/modules/services/x11/desktop-managers/gnome.nix | 7 +++++++ 3 files changed, 18 insertions(+) (limited to 'nixos') diff --git a/nixos/doc/manual/from_md/release-notes/rl-2111.section.xml b/nixos/doc/manual/from_md/release-notes/rl-2111.section.xml index b922f9f12082..cd8f9e316412 100644 --- a/nixos/doc/manual/from_md/release-notes/rl-2111.section.xml +++ b/nixos/doc/manual/from_md/release-notes/rl-2111.section.xml @@ -1088,6 +1088,15 @@ Superuser created successfully. but instead use more of the YAML-specific syntax. + + + GNOME desktop environment now enables + QGnomePlatform as the Qt platform theme, + which should avoid crashes when opening file chooser dialogs + in Qt apps by using XDG desktop portal. Additionally, it will + make the apps fit better visually. + + diff --git a/nixos/doc/manual/release-notes/rl-2111.section.md b/nixos/doc/manual/release-notes/rl-2111.section.md index c7e5afb7d0af..0bc35cdb643a 100644 --- a/nixos/doc/manual/release-notes/rl-2111.section.md +++ b/nixos/doc/manual/release-notes/rl-2111.section.md @@ -311,3 +311,5 @@ To be able to access the web UI this port needs to be opened in the firewall. - Nginx will use the value of `sslTrustedCertificate` if provided for a virtual host, even if `enableACME` is set. This is useful for providers not using the same certificate to sign OCSP responses and server certificates. - `lib.formats.yaml`'s `generate` will not generate JSON anymore, but instead use more of the YAML-specific syntax. + +- GNOME desktop environment now enables `QGnomePlatform` as the Qt platform theme, which should avoid crashes when opening file chooser dialogs in Qt apps by using XDG desktop portal. Additionally, it will make the apps fit better visually. diff --git a/nixos/modules/services/x11/desktop-managers/gnome.nix b/nixos/modules/services/x11/desktop-managers/gnome.nix index b0859321a525..4bc42525906c 100644 --- a/nixos/modules/services/x11/desktop-managers/gnome.nix +++ b/nixos/modules/services/x11/desktop-managers/gnome.nix @@ -372,6 +372,13 @@ in xdg.portal.enable = true; xdg.portal.extraPortals = [ pkgs.xdg-desktop-portal-gtk ]; + # Harmonize Qt5 application style and also make them use the portal for file chooser dialog. + qt5 = { + enable = mkDefault true; + platformTheme = mkDefault "gnome"; + style = mkDefault "adwaita"; + }; + networking.networkmanager.enable = mkDefault true; services.xserver.updateDbusEnvironment = true; -- cgit 1.4.1