FLTK applications cannot start

[Michael R Sweet]

Hi,

I'm trying to create snaps for two FLTK-based applications I maintain (rasterview and HTMLDOC) but when I run these applications I get two error messages:

    XOpenIM() failed
    Unable to find fonts. Check your FontConfig configuration.

Both applications list the "x11" and "unity7" interfaces in the plugs: value in snapcraft.yaml, but neither will open a window. (HTMLDOC also has a command-line mode, and that works just fine...)

The projects are hosted on Github:

    https://github.com/michaelrsweet/htmldoc
    https://github.com/michaelrsweet/rasterview

[Kyle Fazzari (kyrofa)]

You're not setting the environment correctly for FLTK to find assets such as fonts. You can do this by hand, but I've had success using the desktop-gtk3 part to do it. Something like this:

    parts:
      my-fltk-part:
        # ...
        after: [desktop-gtk3]

    apps:
      my-fltk-app:
        command: desktop-launch <real command>

[Michael R Sweet (msweet)]

I made the suggested changes and this is the error I am getting:

    /snap/htmldoc/3/bin/desktop-launch: line 309: /home/mike/c/htmldoc/bin/htmldoc: No such file or directory

Thoughts?

[Launchpad Janitor (janitor)]

[Expired for Snapcraft because there has been no activity for 60 days.]

[Michael R Sweet (msweet)]

Adding $SNAP in front of the command path seems to have done the job:

apps:
    htmldoc:
        command: desktop-launch $SNAP/bin/htmldoc
        desktop: share/applications/htmldoc.desktop
        plugs: [home, network, x11]

parts:
    main:
        plugin: autotools
        source: .
        after: [desktop-gtk3]

build-packages: [libfltk1.3-dev]

I think this needs to be included in the documentation/examples (not specifically the FLTK parts, but the command and after bits are VERY hard to find!)