Le 06/10/2016 à 21:34, Eloy García (PC Actual) a écrit : > Hi all. > > I develop a java-based application to download and manage wallpapers > from the Internet (wallpaperdownloader) > (https://bitbucket.org/eloy_garcia_pca/wallpaperdownloader/overview). > The applications is in the store but now I'm trying to integrate XFCE > desktop too. I mean, now you can set any wallpaper downloaded directly > from the GUI and it is working fine for GNOME 3, Unity and MATE. All > three of them use gsettings interface and desktop-gtk3 wrapper part as > you can see in the snapcraft.yaml: > > name: wallpaperdownloader > version: "2.2" > summary: Download and manage your favorite wallpapers from the Internet > description: WallpaperDownloader is a simple GUI Java based application for > downloading and managing wallpapers from the Internet > grade: stable > confinement: strict > > apps: > wallpaperdownloader: > command: wallpaperdownloader.sh > plugs: [x11, network-bind, home, gsettings] > > parts: > # Pulls the code from the original source (master branch) > # desktop/gtk3 is a snapcraft part (snapcraft-desktop-helpers) from > the Wiki: https://wiki.ubuntu.com/snapcraft/parts > # It enables desktop integration and gsettings manipulation from the > confined application > # It is necessary to use gsettings interface (see above) in order to > have a fully functional > # desktop/gtk3 part > # Github repository for snapcraft-desktop-helpers: > https://github.com/ubuntu/snapcraft-desktop-helpers > wallpaperdownloader: > plugin: maven > source: .. > stage-packages: > # mate-desktop-common is necessary to have MATE gsettings schemas > available for the application > - mate-desktop-common > after: [desktop/gtk3] > > # It will copy wallpaperdownloader script into /bin/ > # This script contains all the commands needed (sets env variables, > launches the jar file...) to > # execute the application > exec: > plugin: dump > source: scripts > Now, if XFCE desktop is detected by the application, the command run > inthe background is 'xfconf-query --channel xfce4-desktop --property > /backdrop/screen0/monitor0/workspace0/last-image --set wallpaper.jpg'. > If the application runs natively, there is no problem and the > wallpaper is set properly. But when I test the snap package built, > this is the error thrown: > > ERROR LinuxWallpaperChanger:188 - Property > "/backdrop/screen0/monitor0/workspace0/last-image" does not exist on > channel "xfce4-desktop". If a new property should be created, use the > --create option. > > I have included xfconf as stage-package and the command xfconf-query > is found within the snap. Could you give me a hint to solve this problem? > > Thank you very much for your time and your help :)
Hey Eloy, I'm not a xfconf user and so can't answer to you precisly. However, my guess is that you will need a file (like the dconf one we are using in GNOME/Unity environment) shared between your user's settings and the snap writable path. The desktop launcher is creating a symlink (accessed via the home interface) between the main user's dconf/user file to path of the snap writable path, to be able to read the value. The gsettings interfaces give, on its side, access to the dbus call for this. I wonder if the unaccessible file/dbus property could trigger this error fallback in xfconf, and hence, prints that message. I hope this helps! Cheers, Didier
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