<html> <head> <meta content="text/html; charset=windows-1252" http-equiv="Content-Type"> </head> <body bgcolor="#FFFFFF" text="#000000"> <div class="moz-cite-prefix">Le 06/10/2016 à 21:34, Eloy García (PC Actual) a écrit : </div> <blockquote cite="mid:CAFW_=cNB7XYN7B9dhfjGaN4uvNRMsNn7wt6Z0fcpL6PVETAXbg@mail.gmail.com" type="cite"> <div dir="ltr"> <div>Hi all. </div> I develop a java-based application to download and manage wallpapers from the Internet (wallpaperdownloader) (<a moz-do-not-send="true" href="https://bitbucket.org/eloy_garcia_pca/wallpaperdownloader/overview">https://bitbucket.org/eloy_garcia_pca/wallpaperdownloader/overview</a>). 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: <pre>name: wallpaperdownloader <a moz-do-not-send="true" name="snapcraft.yaml-2"></a>version: "2.2" <a moz-do-not-send="true" name="snapcraft.yaml-3"></a>summary: Download and manage your favorite wallpapers from the Internet <a moz-do-not-send="true" name="snapcraft.yaml-4"></a>description: WallpaperDownloader is a simple GUI Java based application for downloading and managing wallpapers from the Internet <a moz-do-not-send="true" name="snapcraft.yaml-5"></a>grade: stable <a moz-do-not-send="true" name="snapcraft.yaml-6"></a>confinement: strict <a moz-do-not-send="true" name="snapcraft.yaml-7"></a> <a moz-do-not-send="true" name="snapcraft.yaml-8"></a>apps: <a moz-do-not-send="true" name="snapcraft.yaml-9"></a> wallpaperdownloader: <a moz-do-not-send="true" name="snapcraft.yaml-10"></a> command: wallpaperdownloader.sh <a moz-do-not-send="true" name="snapcraft.yaml-11"></a> plugs: [x11, network-bind, home, gsettings] <a moz-do-not-send="true" name="snapcraft.yaml-12"></a> <a moz-do-not-send="true" name="snapcraft.yaml-13"></a>parts: <a moz-do-not-send="true" name="snapcraft.yaml-14"></a> # Pulls the code from the original source (master branch) <a moz-do-not-send="true" name="snapcraft.yaml-15"></a> # desktop/gtk3 is a snapcraft part (snapcraft-desktop-helpers) from the Wiki: <a moz-do-not-send="true" href="https://wiki.ubuntu.com/snapcraft/parts">https://wiki.ubuntu.com/snapcraft/parts</a> <a moz-do-not-send="true" name="snapcraft.yaml-16"></a> # It enables desktop integration and gsettings manipulation from the confined application <a moz-do-not-send="true" name="snapcraft.yaml-17"></a> # It is necessary to use gsettings interface (see above) in order to have a fully functional <a moz-do-not-send="true" name="snapcraft.yaml-18"></a> # desktop/gtk3 part <a moz-do-not-send="true" name="snapcraft.yaml-19"></a> # Github repository for snapcraft-desktop-helpers: <a moz-do-not-send="true" href="https://github.com/ubuntu/snapcraft-desktop-helpers">https://github.com/ubuntu/snapcraft-desktop-helpers</a> <a moz-do-not-send="true" name="snapcraft.yaml-20"></a> wallpaperdownloader: <a moz-do-not-send="true" name="snapcraft.yaml-21"></a> plugin: maven <a moz-do-not-send="true" name="snapcraft.yaml-22"></a> source: .. <a moz-do-not-send="true" name="snapcraft.yaml-23"></a> stage-packages: <a moz-do-not-send="true" name="snapcraft.yaml-24"></a> # mate-desktop-common is necessary to have MATE gsettings schemas available for the application <a moz-do-not-send="true" name="snapcraft.yaml-25"></a> - mate-desktop-common <a moz-do-not-send="true" name="snapcraft.yaml-26"></a> after: [desktop/gtk3] <a moz-do-not-send="true" name="snapcraft.yaml-27"></a> <a moz-do-not-send="true" name="snapcraft.yaml-28"></a> # It will copy wallpaperdownloader script into /bin/ <a moz-do-not-send="true" name="snapcraft.yaml-29"></a> # This script contains all the commands needed (sets env variables, launches the jar file...) to <a moz-do-not-send="true" name="snapcraft.yaml-30"></a> # execute the application <a moz-do-not-send="true" name="snapcraft.yaml-31"></a> exec: <a moz-do-not-send="true" name="snapcraft.yaml-32"></a> plugin: dump <a moz-do-not-send="true" name="snapcraft.yaml-33"></a> source: scripts</pre> 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: <div> 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. <div> <div> </div> <div>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? </div> <div>Thank you very much for your time and your help :) </div> </div> </div> </div> </blockquote> 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 </body> </html>