Hi Didier, hi all. I've been trying to accomplish this mission but I miss something (my bet is that I need an interface similar to gsettings but it doesn't exist something like this).
1.- I have successfully created a symlink from /home/$USER/.config/xfce4/xfconf/xfce-perchannel-xml inside the snap directory and all the XML files in which the configuration is stored are accessible for the application. 2.- I have defined, as stage package, xfconf, the tool to write configurations directly into those XML files. 3.- But when I execute ' xfconf-query --channel xfce4-desktop --property /backdrop/screen0/monitor0/workspace0/last-image --set wallpaper.jpg' inside my application, I still receive 'Property "/backdrop/screen0/monitor0/workspace0/last-image" does not exist on channel "xfce4-desktop". If a new property should be created, use the --create option.' and xfce-destop.xml (the XML which has the configuration for the background wallpaper) is not modified at all. Maybe is needed an interface similar to gsettings? If this is the case, can I program something like that? Thank you very much! :) Best, Eloy 2016-10-24 11:08 GMT+02:00 Didier Roche <didro...@ubuntu.com>: > Le 24/10/2016 à 10:58, Eloy García (PC Actual) a écrit : > > Hi Didier! > > > > Thanks as always for your answer and feedback :) I suspected it and I > > was taking a look to desktop launcher source code on github, but I > > didn't have time to test it. One question: Can I create the symblink > > when the snap application is executed (after installation) via the > > script that i use to wrap up the launching process or will I have > > problems to do that because of the confinement? > > No worry :) > > As long as your snap has the right plug to access the initial file, this > isn't an issue (and exactly what I'm doing in the desktop launcher for > dconf/gsettings: creating symlink on first launch or after each snap > upgrade if the symlink isn't present). > You can see such an example in > https://github.com/ubuntu/snapcraft-desktop-helpers/blob/master/glib-only/ > launcher-specific#L37 > for instance. > > (But yeah, it relies on /home/$USER/ and should probably find a better > way to get user's real home directory. I can't use $HOME as it's > redirected to SNAP_USER_DATA in some cases) > > > > > > Best, > > > > Eloy > > > > 2016-10-24 10:14 GMT+02:00 Didier Roche <didro...@ubuntu.com > > <mailto:didro...@ubuntu.com>>: > > > > 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 > <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 > >> <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 > >> <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 > > > > > > -- > > Snapcraft mailing list > > Snapcraft@lists.snapcraft.io <mailto:Snapcraft@lists.snapcraft.io> > > Modify settings or unsubscribe at: > > https://lists.ubuntu.com/mailman/listinfo/snapcraft > > <https://lists.ubuntu.com/mailman/listinfo/snapcraft> > > > > > > > > > > -- > > Eloy García Almadén > > -- Eloy García Almadén
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