I have some interest in using file managers that draw a desktop over the root window, like Caja, with FVWM, but when I try it, I end up with undesirable focus behavior. I want strict FocusFollowsMouse, but the desktop provided by Caja does not take focus unless it is clicked, which results in windows not under the mouse retaining focus if the mouse leaves it without entering another non-desktop window. This is typical “focus follows mouse” behavior in various other window managers and desktop environments, probably by design, but I want to find out if there is a way to fix the issue from FVWM’s end. Caja’s desktop window information looks like this:
FvwmIdent
Name: x-caja-desktop
Icon Name: x-caja-desktop
Class: Caja
Resource: desktop_window
Window ID: 0x5400006
Desk: 2
Xinerama Screen: 1
Layer: 0
Width: 3840
Height: 1920
X (current page): 0
Y (current page): 0
Boundary Width: 0
StickyPage: Yes
StickyDesk: Yes
StickyPageIcon: No
StickyDeskIcon: No
NoTitle: Yes
Iconified: No
Transient: No
WindowListSkip: Yes
Gravity: NorthWest
Geometry: 3840x1920+0+0
Focus Policy: Locally Active
- Input Field: True
-WM_TAKE_FOCUS: Present
EWMH Window Type: Desktop
xwininfo
xwininfo: Window id: 0x5400006 "x-caja-desktop"
Absolute upper-left X: 0
Absolute upper-left Y: 0
Relative upper-left X: 0
Relative upper-left Y: 0
Width: 3840
Height: 1920
Depth: 24
Visual: 0x2b
Visual Class: TrueColor
Border width: 0
Class: InputOutput
Colormap: 0x5400005 (installed)
Bit Gravity State: NorthWestGravity
Window Gravity State: NorthWestGravity
Backing Store State: NotUseful
Save Under State: no
Map State: IsViewable
Override Redirect State: no
Corners: +0+0 -0+0 -0-0 +0-0
-geometry 3840x1920+0+0
I am also looking through the Caja source code to see if it sets up anything to prevent focus on mouseover going to the desktop, but I’m not familiar enough with this issue yet to know whether it’s the deliberate work of Caja, a side effect of the applicable EWMH, or something else. Any advice will be appreciated.