Created attachment 8090 Sample xfpanel 4.13.3 aero panel image not blend along with notification, dockbarx Hello I've this issue very long ago at first I was wonder is this a bug?, lost feature or what? Seems nothing changed at all with any new 4.13.x I was thought something was off the alpha transparency function was extinct in The solid color change into that I've to go into Pick color to scroll 0-100% of color to make transparency like lxterminal transparency bg. But image transparency background doesn't work like on xfce4.12 GTK2 panel anymore Even worse normal(use system style) I can do nothing about alpha since that scroll function like 4.12 was gone. If you see carefully dockbarx(gtk3), xfce notification, pulseautio panel transparency worked properly but the major xfce panel itself doesn't work & not match together with these 3 while these 3 blend well in 4.12. Did missing something settings about one of these? gtk-2.0/gtkrc, gtk-2.0/apps/panel.rc gtk-3.0/gtk.css I've tried many gtk2+3.0 theme for xfce panel 4.13 series 95% of them not work only Greybird among odd that show transparency a little. If I change into soild texture images like wood texture it blend along well normally. Regards
If you want to have a semi-transparent image as background I think you can still do that by creating a semi-transparent image and setting it as a background. I understand that that's a behavioral change, but we can try to describe it well in the docs.
Simon Steinbeiss referenced this bugreport in commit ff724933be1b16c074660470f79ab2a688fa9339 Fix alpha-transparent background images (Bug #14850) https://git.xfce.org/xfce/xfce4-panel/commit?id=ff724933be1b16c074660470f79ab2a688fa9339
While the transparency slider is not restored for images and will not be restored (simply because you can always create semi-transparent images with Gimp or a software of your choosing and it's a waste of resources and LOC/complexity to do this at runtime for the panel) the bug you rightfully complained about is now fixed. You can also use imagemagick's "convert" command like this to get a 75% percent transparent picture (note that this simple approach does not play well with existing alpha-gradients): convert <image> -alpha on -channel a -evaluate set 25% result.png Sorry it took so long, but I had to read through the report a few times to really understand what it was about.
Thank you, Simon I've faith in Xfce & Xubuntu team, no matter how late reply come. Fixed better than unsolved. Even myself sometime I slowpoke on reply as well. But I do check the reply in the end. I've tested it out. Finally solved. Even dockbarx, pulseaudio, datetime, xkb on gtk3 xfce all worked! This last puzzle affect my decision to shift xfce4.14 backported on debian stretch & buster that nearly come. Now I've finally shifted to xfce4.14pre on stretch fully from my own repo. So far nothing much buggy only thunar columns & xfce settings icon behaviour that i'll report in next bug reports.