Hi!
GNOME applets now come with "symbolic" icons. They are chroma-keyed SVG
icons. The final color is decided by the theme. In my case, I am using a
black background for the systray and my GNOME theme (the default one,
Adwaita) is expecting a clear background and display black icons which
are therefore invisible. I have searched a bit how to change this
without messing with the whole theme and I have discovered this:
https://mail.gnome.org/archives/commits-list/2010-April/msg09154.html
My understanding is that if I set _NET_SYSTEM_TRAY_COLORS property to
white, I will get the appropriate effect. With the help of gdb and three
hours later, I came with the following thingy to get what I want:
xprop -id 0xc00002 -format _NET_SYSTEM_TRAY_COLORS 32c -set
_NET_SYSTEM_TRAY_COLORS
65535,65535,65535,65535,8670,8670,65535,32385,0,8670,65535,8670
Then, I restart my applet and, bingo, I get the appropriate color. I
don't understand why I should restart the applet while GTK has code to
detect a change to this atom but this is not very important. Now my
questions:
0xc00001 is awesome. I suppose 0xc00002 is related. How could I compute
it? Maybe that's the first screen (for GTK, this "window" is related to
a screen)?
xwininfo -id 0xc00002
xwininfo: Window id: 0xc00002 (has no name)
Absolute upper-left X: 1324
Absolute upper-left Y: 0
Relative upper-left X: 1324
Relative upper-left Y: 0
Width: 42
Height: 14
Depth: 24
Visual: 0x21
Visual Class: TrueColor
Border width: 0
Class: InputOutput
Colormap: 0x20 (installed)
Bit Gravity State: ForgetGravity
Window Gravity State: NorthWestGravity
Backing Store State: NotUseful
Save Under State: no
Map State: IsViewable
Override Redirect State: no
Corners: +1324+0 -0+0 -0-754 +1324-754
-geometry 42x14+0+0
Second question: is there something cleaner than to call xprop to
modify this property?
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