some software cannot show icon with using appimage format file

[newyorkthink]

when i using alttab to select software item.

like this:

they are all appimage format file

but some software cannot display icon , some software has normal.

they have full icon , but they cannot show:
example for stacer

and 16x16 32x32 ...

but alttab cannot show it

[sagb]

Please follow this instruction: https://github.com/sagb/alttab/blob/master/doc/icons.md

[newyorkthink]

Please follow this instruction: https://github.com/sagb/alttab/blob/master/doc/icons.md

i try use this , but it not work show

[sagb]

None of the icons (including those displayed correctly) are loaded from files:

Let's try to realize why. Run xprop | grep CLASS and click on qemu window. Show the xprop output.

[newyorkthink]

[newyorkthink]

this is too

[newyorkthink]

[sagb]

for class in qemu qemu-system-x86_64 remote_viewer ; do
    find \
    /usr/share/icons/hicolor/*x*/apps/ \
    /usr/local/share/icons/hicolor/*x*/apps/ \
    ~/.icons/hicolor/*x*/apps/ \
    ~/.local/share/icons/hicolor/*x*/apps/ \
    /usr/share/pixmaps/ \
    ~/.local/share/pixmaps/ \
    -iname $class\* 2>/dev/null
done

[newyorkthink]

for class in qemu qemu-system-x86_64 remote_viewer ; do
    find \
    /usr/share/icons/hicolor/*x*/apps/ \
    /usr/local/share/icons/hicolor/*x*/apps/ \
    ~/.icons/hicolor/*x*/apps/ \
    ~/.local/share/icons/hicolor/*x*/apps/ \
    /usr/share/pixmaps/ \
    ~/.local/share/pixmaps/ \
    -iname $class\* 2>/dev/null
done

i using the appimage file , the system not have they.

and my browser file is appimage to, they can show

[newyorkthink]

[newyorkthink]

[sagb]

You can fix your problem by copying suitable qemu.png and remote_viewer.png (find them anywhere) in any directory from the script above, for example: /usr/share/icons/hicolor/128x128/apps/qemu.png

[sagb]

If there is no such directory, create it.