Using gtk-3-themes with kde-neon

snapcraft
1

We are trying to figure out how to make our Qt App adhere to Gtk Themes, currently, it doesn’t and it looks like this:

image

Currently we are looking at adding gtk-3-themes plugin:

plugs:
  gtk-3-themes:
    interface: content
    target: $SNAP/data-dir/themes
    default-provider: gtk-common-themes:gtk-3-themes

then add a launcher and add the qt5-gtk-platformtheme package as a stage-package.

The problem is that the package is not in the kde-neon base, thus it pulls the qt5 version from bionic.
It might work if we remove the kde-neon extension and include qt5 in the snap, but the size of the snap would then increase.

Is this the proper way to do it or can someone propose a better solution?
Can that package be added to kde-neon interface?

Here is our snapcraft.yaml

name: ksnip
base: core18
adopt-info: ksnip
icon: desktop/ksnip.svg
grade: stable
confinement: strict
summary: Screenshot and Annotation Tool
description: |
  Qt based cross-platform screenshot tool that provides many annotation features for your screenshots.
apps:
  ksnip:
    command: ksnip
    common-id: ksnip
    environment:
      # Coerce XDG_CURRENT_DESKTOP to Unity so that App Indicators
      # are used and do not fall back to Notification Area applets
      # or disappear completely.
      XDG_CURRENT_DESKTOP: Unity:Unity7
      # Set theme fix on gnome/gtk
      QT_QPA_PLATFORMTHEME: gtk3
    desktop: share/applications/ksnip.desktop
    extensions: [kde-neon]
    plugs:
      - home
      - removable-media
      - unity7

parts:
  ksnip:
    source: .
    plugin: cmake
    parse-info: [share/metainfo/ksnip.appdata.xml]
    after:
      - kimageannotator
    build-snaps:
      - kde-frameworks-5-core18-sdk
    build-packages:
      - libglvnd-dev
      - libx11-dev
    configflags:
      - -DCMAKE_FIND_ROOT_PATH=/snap/kde-frameworks-5-core18-sdk/current;/snap/kimageannotator/current
    override-pull: |
      snapcraftctl pull
      sed -i 's|Icon=.*|Icon=share/pixmaps/ksnip.svg|g' desktop/ksnip.desktop
      snapcraftctl set-version $(cat CMakeLists.txt | grep project\(ksnip | cut -d" " -f5 | cut -d")" -f1)
  kimageannotator:
    source: https://github.com/ksnip/kImageAnnotator.git
    plugin: cmake
    after:
      - kcolorpicker
    configflags:
      - -DCMAKE_FIND_ROOT_PATH=/snap/kde-frameworks-5-core18-sdk/current;/snap/kcolorpicker/current
  kcolorpicker:
    source: https://github.com/ksnip/kColorPicker.git
    plugin: cmake
    configflags:
      - -DCMAKE_FIND_ROOT_PATH=/snap/kde-frameworks-5-core18-sdk/current
  cleanup:
    after: [kcolorpicker, kimageannotator, ksnip]
    plugin: nil
    build-snaps: [ kde-frameworks-5-core18 ]
    override-prime: |
        set -eux
        cd /snap/kde-frameworks-5-core18/current
        find . -type f,l -exec rm -f $SNAPCRAFT_PRIME/{} \;

Any thoughts?

2

kde-framworks-5-core18 is built with packages from deb http://archive.neon.kde.org/release bionic main (see https://cgit.kde.org/snap-kf5.git/tree/Rakefile?h=core18).

You should be able to ship an ABI compatible qt5-gtk-platformtheme from that repo, I guess :thinking:

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